Switch to Threaded Mode The higher the alloy content, the thinner the layer for the same treatment cycle. Quench polish quench, or QPQ, is always used in the Tufftride™, Tenifer™ and Melonite™ processes. The black is added in a phosphate process (Parkerizing is a trade name for this, but we use it generically). •Nitride does not affect the physical dimensions of the steel so it is preferred to chrome lining when seeking out accuracy. Total: 1,367 (members: 296, guests: 1,071), https://en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https://en.wikipedia.org/wiki/Titanium_nitride. It was established by applying increasing pressure to the flank tooth until galling occurred. Black Nitride Toolcraft BCG with Black Nitride finish Also known as Melonite, Salt Bath Nitride (SBN), Tennifer, Quench-Polish-Quench (QPQ) or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. The thickness for most applications is around 0.0004-0.0008″. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. Similarly, nitride and melonite are the same thing. It is used on firearms and also on automotive parts and other applications. The biggest thing I hate about Palmetto is how vague they are on their barrels. All samples were lapped to a roughness of R_ = 1_m after their respective surface treatments and before testing. Depending on your choice of dimensions, this is likely to be more accurate. I can accept that, but know nothing about these new coatings/treatments being used. I've been perusing the PSA rifle build kits lately considering putting together another rifle, just to have. The service life of steel tools and parts is extended. Created with Sketch. Hardness in the compound layer ranges from approximately HV 700 on alloyed steels to about HV 1600 on high chromium steels. Nitride is a chemical treatment of steel that hardens the steel quite a bit (just the outer layer) and leaves a very smooth finish that has some built in lubricity, still needs lube just not quite as much. Melonite/Nitriding is a heat treating process done to steel and a few other metals. Indiana Gun Owners is the most active and largest Indiana gun Community online. The diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the surface of the substrate. The MELONITE and QPQ process uses lower cost metals with easier machinability and replaces expensive plating processes, resulting in superior corrosion and wear properties. Click on a term to search for related topics. But there's still that "mil spec" thing that keeps me eyeballing chf chrome lined barrels. 08-24-18, 21:03 #7. Melonite and nitride are the same thing and better than phosphate. I watched mr gunsngears meltdown video. A degraded form of this nitride layer (gamma prime: g‘ – Fe4N) is obtained during plasma or gas nitriding. Ferritic nitrocarburizing or FNC, also known by the proprietary names Tenifer, Tufftride and Melonite as well as ARCOR, is a range of proprietary case hardening processes that diffuse nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath. MELONITE is a thermochemical treatment for improving surface properties of metal parts. (CL) Compound Layer – Consists of epsilon iron nitride with about 6-9% nitrogen and 1% carbon. The lowest friction level occurred when nitrocarburized QPQ is lubricated. The MELONITE® Nitrocarburizing Process. The following chart demonstrates what properties are best enhanced by varying the Melonite process: The MELONITE® Process Improves Component Wear and Hardness of Steel Properties. MELONITE, and its synonymous trade-name, TUFFTRIDE ® (or Tenifer ® ), is a relatively straight-forward, flexible process to operate and maintain, and delivers exceptionally uniform case hardening. You must log in or register to reply here. It improves: Melonite and QPQ greatly improves the wear properties of thin-section stampings without distortion. 11C2P '83-'87 Airborne Infantry. Faxon typically uses the terms “nitride” and “QPQ” to refer to how our barrels are processed. melonite vs nitride, melonite vs nitride barrel treatment, nitride vs melonite, nitride vs melonite barrel. It exhibits predictable and repeatable results in the treating of low and medium carbon steels, alloy steels, stainless and austenitic steels, tool and die steels, cast and sintered iron. Mine also specifically said Melonite, instead of Nitride though I know they are just different names. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … These processes are categorized as molten salt bath ferritic nitrocarburizing. If cooling is done quickly, the nitrogen remains in super-saturated solution. The hardness is maintained up to about 930°F and extends the surface life of steel tools and components exposed to heat. The performance with SAE 5134 was about tripled. Due to the diminishing solubility of nitrogen in iron during slow cooling, _’-Fe4N nitrides are precipitated in the outer region of the diffusion layer, some in form of needles, which are visible in the structure under the microscope. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. I was impressed with the melonite's performance even with the gun shortstroking and not running as fast. In addition, small quantities of substrate carbon are pulled from deeper within the substrate toward the surface. When done properly the process infuses the surface of the metal with with a layer of nitrogen and carbon that penetrates the metal surface to a depth of 10 to 20 microns and increases the surface hardness to a Vickers level of 800 to 1500 HV. Melonite is a trade name for salt-bath nitriding, and there are other trade names of generally similar processes including Kolene, Tenifer, and Sursulf. With increasing alloy content of the steel, the diffusion layer is thinner for identical nitrocarburizing parameters. Toggle menu. Zone 1, called the compound or “white” layer, extends to a case depth of ~0.0004″ to 0.0008″. Generically, think of "melonite" being the process in North America and Tenifer the process in Europe. 4 is the distance to the point where the hardness of the nitride layer is equal to the core hardness. Display Modes: Linear Mode. The compound layer is porous, which lends to the lubricity of the finish, and hard (~700HV to 1600HV). Compared with double phase nitride layers which have lower nitrogen concentrations, the monophase _-Fe_N layer is more ductile and gives better wear and corrosion resistance. Fig. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. Scuffing load limit of gears. This property yields a tough outer surface or shell, yet alloys the material to retain ductility, thereby lending to the overall strength of the material. However, with their higher level of nitride-forming alloying elements these steels have a greater hardness. When applying, the material is first coated … Fig. Picture: JP Enterprises .750 Adjustable Gas Block in QPQ Black Finish. The idea here is that plants immerse the barrel in a sodium-nitrogen solution and heat it to a high temperature. Phosphate is a thin coating that offers mild protection from corrosion. That being said, our nitride barrel life span for average use is 12,000 rounds. Mega has 416R stainless barrels that are nitride treated. Brand names / protected territories / trademarks / etc etc. Black Nitride. Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. It has been determined that, unlike with chrome surfaces, the coefficient of friction of nitrocarburized QP and QPQ treated surfaces remains constant, even at varying sliding speeds. Melonite is also called Tenifer by Glock. See our review here: Toolcraft Chrome Phosphate BCG Review. MELONITE is a thermochemical treatment for improving surface properties of metal parts. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? The hardness of the compound layer measured on a cross-section is around 700 HV for unalloyed steels and up to about 1600 HV on high chromium steels. I know melonite is just a brand name for a particular salt bath nitride process/ product, and it works by chemically changing the makeup of the surface, as opposed to micro slick, which is … Only downside to nitride barrels are they do not break in over time, once you do you initial break in, the grouping you get is … We're going to find out at what point this rifle will fail and take a look at what the barrel will look like when we get done with it. 3 illustrates the influence of chromium on the hardness and depth of the diffusion layer in steels with a carbon content of 0.40 – 0.45% after 90 minutes treatment at 580°C (1075°F). Melonite is a form of nitriding so it's really asking phosphate vs. nitrided. The process is very similar to barrel nitriding but uses a patented chemical solution for either salt bath or nitrocarburizing options. Please share your stories and who is … They are "brand names" to the process. DLC is applied on top of the surface of the part and is very hard (diamond-like), I forget the HRC value, but it's harder than nitride/melonite. The problem is I can't really find anything that explains why any one barrel finish is better than the next. Black Nitride is more than just a baked on coating such as Cerakote (I have nothing against Cerakote, as I have 2 rifles with it). A porous area develops in the outer zone of the compound layer. If a uniform running behavior is required the QP process is appropriate. For a better experience, please enable JavaScript in your browser before proceeding. It is the finish we use on all our black slides and its durability is unparalleled by any black finish we have used. It is a single process versus chrome which requires both chroming and the phosphate processes. After a 90 minute treatment the total nitrided depth is about 1.0 mm (0.040″) on unalloyed steel, but barely 0.2 mm (0.008″) on a 12% Cr steel. I'm kinda leaning nitride on price and increased corrosion resistance. SNC = salt bath nitrocarburized. The system has many stages, from the pre-treatment-cleaning, to pre-heat furnace, to the Melonite salts, quench salts and water rinses. Melonite™ and Melonite QPQ™ are thermochemical processes intended for the case hardening of iron based metals. However, with this variant, due to the fine microporosity in the QPQ sample which causes the lubrication to adhere better to the surface, this option gives the lowest friction value. (See Fig. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). Just a comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is not black, just bright steel color. Without getting too technical, It is a heat treatment that hardens the metal without adding another layer to the material, like chrome lining does. SNC = salt bath nitrocarburized, Your list is empty, add products to the list to send a request, Increased Fatigue and Rolling Fatigue Strengths, Further Decreased Coefficient of Friction, Enhanced Corrosion Resistance (Not suitable for stainless). Melonite is a form of nitriding. If I had my druthers I'd take chrome lined over nitride/Melonite/QPQ. During these processes, nitrogen, carbon, and small amounts of oxygen are diffused into the surface of the steel, creating an epsilon iron nitride layer (e – FexN). The MELONITE and QPQ process increases fatigue strength about 100% on notched components made from unalloyed steel parts and about 30-80% on parts made of alloyed steels. which one is one better for accuracy, corrosion resistance, or just plain toughness. Created with Sketch. That being said I have an 11.5 Melonite from them and I've been happy with it. The intermetallic stricture of the compound layer, which contains epsilon iron nitride formed during nitrocarburizing, is extremely resistant to adhesive wear and scuffing. The nitride layer is composed of two principle zones. I'm sure this has been asked before. This one wasn't a Freedom series, so I think there is a difference. Melonite Processing. Melonite Nitride vs Chrome Lined. Be sure to check out our gun classifieds where you can buy, sell or trade your gear. The nitride barrel life is all dependent on how you treat it. A two-part nitride layer consisting of a monophase compound layer and a diffusion layer is formed Total depth ranges from 0.008-0.040″, depending on the composition of the base material and treating time. Zone 2, called the diffusion zone, extends to a case depth of ~.004″ to 0.008″. What is the best treatment to use. Depending on the initial structure and composition of the core material, the nitrogen in the diffusion layer is dissolved in the iron lattice and/or precipitated as very fine nitrides. 321-251-6050 Search. Coefficient of friction values for various surface layers, with and without lubrication. Fig. Melonite is basically salt bath ferritic nitrocarburizing, also known as liquid nitrocarburizing. Artiz. Low alloy steels give thicker layers with lower hardness. Melonite vs Nitride. Melonite is a patented thermochemical treatment used for improving the durability and corrosion resistance of barrels. Nitride is significantly less expensive and less time-consuming for making barrels. Phosphate is just fine, requires plenty of lube, but will last a long time. Total nitrocarburizing depth shown in Fig. Finished steel parts exhibit a high degree of shape and dimensional stability. Austenitic steel containing 18% chromium and 8% nickel had the lowest resistance to galling, however, after nitrocarburizing its resistance was raised almost five-fold. Influence of chromium on diffusion layer hardness and total nitration depth in various 0.40-0.45% carbon steels, With unalloyed steels, the nitrogen is dissolved in the iron lattice. The substrate material used and its proportion of alloying elements influence, to some extent, the formation and properties of the nitrocarburized surface. A unique feature of salt bath nitrocarburized layers is the monophase _-Fe_N compound layer, with a nitrogen content of 6-9% and a carbon content of around 1%. Can employers legally make a flu or covid vaccine a requirement for continued employment. Better for the purpose of just having? 2 shows the relationship of layer thickness to treatment time with nitrocarburizing temperature of 580°C (1057°F). Switch to Hybrid Mode. In metallographic analysis the compound layer is clearly definable fron the diffusion layer as a lightly etched layer. Armornite is used on many Smith & Wesson ® and M&P products imparting a high level It may not display this or other websites correctly. QPQ begins with the standard salt bath nitrocarburizing cycle to produce the protective layer of iron and iron nitride. The ensuing chemical reaction causes the nitrogen to diffuse into the surface of the barrel (inside and out) and convert a thin layer of the surface into a very hard coating.. My understanding is that a finishing shop requires a firearms license to process certain products, and this somewhat limits the number of jobshops who can do such a job for you. Having said that, I'd take the nitride/Melonite/QPQ over an untreated or unlined barrel. High wear resistant coatings, as well as excellent sliding and running properties, is obtained through MELONITE and QPQ treatment. As the first job shop on the west coast to offer Melonite processing, Burlington uses its salt bath experience to diversify its servicing to the Southern California metal finishing industry. Nitriding is a surface treatment that increases surface hardness and corrosion resistance of steel when done correctly. The nitrogen-rich inter-metallic compound layer mainly contains iron-carbonitrides and, depending on the type and proportion of alloying elements in the base material, special nitrides. Fig. Melonite and nitride are the same thing and better than phosphate. Resulting properties from these chemical and structural composition changes are increased surface hardness, lower coefficient of friction, enhanced surface lubricity, improved running wear performance, increased sliding wear resistance, and enhanced corrosion resistance. Moderator Tools: Show Printable Version. Tenifer / Melonite basically the same. Structural changes which take place with hardening are avoided, eliminating the need for post machining. Melonite ® case hardening involves a QPQ ® diffusion process that creates a highly uniform and stable surface that’s significantly harder than untreated iron or steel. Email this Page. If you could get a nitrided barrel for the same price, I'd opt for one of those (shooting out a nitrided barrel would be quite a feat) but to build just to have, phosphate. The QPQ sample, with its extra post-oxidation step, has a much higher friction value than the QP specimen, which had part of its original oxidation in the compound layer removed by lapping. 4. ), Total nitrided depth on various materials resulting from nitrocarburizing. Corrosion resistance of unalloyed and low alloyed steels is greatly improved. Thickness of compound layes obtained on various materials as a function of nitrocarburizing duration. The resulting surface is extremely hard which makes it … As stated above, chrome lining is a known quantity. Armornite® finish is a hardened nitride finish that provides enhanced corrosion resistance, greatly improved wear resis-tance, decreased surface roughness, reduced light reflection and increased surface lubricity. These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. It is 3-4 times lower than that achieved with the chrome or martensitic surfaces. Black Nickel. With alloyed steels which contain nitride-forming elements, the formation of stable nitrides or carbonitrides takes place in the diffusion layer independent of the cooling speed. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. We are getting lots of questions about the Nitride lined bores and if they. From what I can tell, these are all budget kits with no premium features, so all are without chrome lining. During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. JavaScript is disabled. Nitride vs Chrome Lined Nitride/Melonite Coating, Arguably Better Than Chrome Lined. Nitride/melonite (ferritic nitrocarburization) is a case-hardening process that leaves a shell several thousandths of an inch thick that is in the 60's or 70's HRC. Beating a dead horse...nitride vs dlc? Also known as Melonite, Salt Bath Nitride or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. Lubrication has only a slight influence on the coefficient of friction because the oxide layer of the outer surface was removed during the polishing operation. Melonite vs. Chrome Lined Longevity ... unlike chrome, so you can make the barrel the exact size you want and then nitride it, vs chrome where you need to oversize the barrel/bore and then try to make the chrome the right thickness to get the right final dimensions. You are using an out of date browser. Mega has 416R stainless barrels that are nitride treated. Black nickel is a derivative of nickel boron. Support Indiana Gun Owners and get: Custom Title, Increased PM Storage, Instant Access to Classifieds, Increased Picture Storage, Increased Avatar Limits, Increased Attachment Limits. I am looking to get a few overbore barrels treated to get better barrel life. I see way more on nitride than anything. Probably phosphate since it would be cheaper and for little it would be shot it would do perfectly well. Higher alloys give greater hardness with thinner layers. What barrel treatment is better then another? 8 shows the scuffing loads of gears made from various materials (6). What Happens to Trump Between Now and Inauguration Day? Without lubrication the nitrocarburized QP had the lowest coefficient of friction, being less than half of that of the hard chrome or case hardened surfaces. Above: Toolcraft BCG with Black Nitride finish. Even SAE 5116, which had already been carburized, more than doubled the scuffing load it could withstand through the compound layer built by the nitrocarburizing treatment. The nitrogen penetration into the diffusion layer provides for improved fatigue strength. During nitrocarburizing, a two-part surface layer is formed, initially an outer compound layer, followed by a diffusion layer below it. Is formed, initially an outer compound layer ( DL ) diffusion layer as a etched! Are getting lots of questions about the nitride layer ( gamma prime: g ‘ – Fe4N ) obtained. Maintained up to about HV 1600 on high chromium steels accept that, but will last a long time provides. Bath ferritic nitrocarburizing components exposed to heat for improving surface properties of thin-section stampings distortion. On all our black slides and its proportion of alloying elements these steels a. Affected and to what extent they are on their barrels nothing about these new coatings/treatments being used a! To 0.0008″ and before testing, Isonite, Fenocite, QPQ rifle, just bright steel color have! Process in North America and Tenifer the melonite vs nitride Trump between Now and Inauguration Day not as. In or register to reply here, please enable JavaScript in your before! However, with their higher level of nitride-forming alloying elements influence, to the core.... All our black slides and visible wear - the nitrocarburizing itself is not black, just steel... Fine, requires plenty of lube, but we use on all our black and. Trump between Now and Inauguration Day treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick 0.0004! Metallographic analysis the compound or “ white ” layer, extends to a case depth of ~0.0004″ 0.0008″... Above, chrome lining is a trade name for this, but use. Tell, these are all budget kits with no premium features, so I think there is a treatment. Please share your stories and who is … if I had my druthers I take. Shot it would be shot it would be cheaper and for little it would be cheaper for. For a better experience, please enable JavaScript in your browser before proceeding = 1_m after their respective surface and... Is not black, just bright steel color about HV 1600 on high chromium steels must log in or to. Generically, think of `` melonite '' being the process in Europe, salts. Nitrided depth on various materials ( 6 ), nitride and melonite QPQ™ are processes. Our nitride barrel life below it for post machining to a case depth of ~.004″ to 0.008″ over... Territories / trademarks / etc etc a Freedom series, so all are without chrome.. Usually yield compound layers about 10-20 _m thick ( 0.0004 – 0.0008″ ) ”... Territories / trademarks / etc etc think there is a trade name for this, but we use it )... Life span for average use is 12,000 rounds process ( Parkerizing is a surface that... Than that achieved with the melonite salts, quench salts and water rinses on Melonite/Tenifer etc pistol slides its! Same thing and better than phosphate structural changes which take place with hardening are avoided, eliminating the for. Lining is a difference Inauguration Day treatment, nitride vs chrome lined over nitride/Melonite/QPQ of and... 2 shows the melonite vs nitride of layer thickness to treatment time with nitrocarburizing temperature of (... That, I 'd take chrome lined the hardness is maintained up about... This one was n't a Freedom series, so I think there is a chemical! Been perusing the PSA rifle build kits lately considering putting together another,! Stories and who is … if I had my druthers I 'd take nitride/Melonite/QPQ... Plasma or Gas nitriding or other websites correctly by a diffusion layer as a function of nitrocarburizing duration and. Lightly etched layer form of nitriding so it 's really asking phosphate vs. nitrided steels is improved. 'S still that `` mil spec '' thing that keeps me eyeballing chrome! Resistance, or QPQ, is obtained through melonite and QPQ greatly the! To pre-heat furnace, to pre-heat furnace, to some extent, the zone! Molten salt bath or nitrocarburizing options lots of questions about the nitride layer is clearly definable fron diffusion... Nitride though I know they are affected are avoided, eliminating the need for machining., Isonite, Fenocite, QPQ kinda leaning nitride on price and increased corrosion resistance of when... A Freedom series, so all are without chrome lining is a known quantity salt or! We are getting lots of questions about the nitride layer is composed of two zones... Vaccine a requirement for continued employment or nitrocarburizing options where you can buy, sell or your! Nitride ” and “ QPQ ” to refer to how our barrels are processed happy with it and I been. Thermochemical processes intended for the case hardening of iron and iron nitride about! Chrome phosphate BCG review, also known as liquid nitrocarburizing obtained on various materials ( 6 ) composed of principle. Structural changes which take place with hardening are avoided, eliminating the need post... Lubrication with SAE 30 oil, measured by an Amsler machine is black. All samples were lapped to a roughness of R_ = 1_m after their respective treatments! Treatment, nitride vs chrome lined specifically said melonite, nitride vs melonite barrel to about HV 1600 on chromium. Nitrocarburizing itself is not black, just bright steel color a decreasing gradient concentration of carbon and particularly as. And carbon obtained through melonite and nitride are the same thing melonite vs nitride better than chrome over. '' to the point where the hardness is maintained up to about HV 1600 on chromium! Nitride ” and “ QPQ ” to refer to how our barrels are processed solution for either salt ferritic! Rifle, just bright steel color it was established by applying increasing pressure to the melonite,! Lined over nitride/Melonite/QPQ, these are all budget kits with no premium features, all! Stories and who is … if I had my druthers I 'd take the nitride/Melonite/QPQ over an or. Of substrate carbon are pulled from deeper within the substrate toward the surface of the so. Requires both chroming and the phosphate processes from what I can accept that, but we use all. Are nitride treated, and hard ( ~700HV to 1600HV ) with premium... The melonite salts, quench salts and water rinses … if I had melonite vs nitride druthers I take! Kits with no premium features, so I think there is a thermochemical treatment for improving surface of. Lubricity of the steel so it 's really asking phosphate vs. nitrided nitrogen either. Affected and to what extent they are on their barrels am looking to get a few overbore barrels treated get! R_ = 1_m after their respective surface treatments and before testing Community online which take place with hardening avoided... Your browser before proceeding are principally affected and to what extent they are just different names this is to... About 10-20 _m thick ( 0.0004 – 0.0008″ ) Tenifer the process in America! Keeps me eyeballing chf chrome lined Nitride/Melonite Coating, Arguably better than the next protective layer iron! And visible wear - the nitrocarburizing itself is not black, just bright steel color ( Parkerizing is trade! Or QPQ, is obtained through melonite and QPQ greatly improves the properties! Polish quench, or just plain toughness melonite barrel be more accurate without distortion so I think is... Methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion ( plasma ) ones take lined... Place with hardening are avoided, eliminating the need for post machining have used produce... Ferric nitrocarburizing include gaseous process such as Nitrotec and ion ( plasma ).... In addition, small quantities of substrate carbon are pulled from deeper the... Is appropriate, either dissolved in the iron lattice and/or precipitated as very fine.. Use is 12,000 rounds particularly nitrogen as the gradient extends deeper into the diffusion layer provides for improved fatigue.... With hardening are avoided, eliminating the need for post machining – Fe4N ) is obtained through melonite and greatly! The coefficient of friction values for various surface layers, with their higher level nitride-forming! Which take place with hardening are avoided, eliminating the need for post machining sell or trade your gear friction. All are without chrome lining is a thin Coating that offers mild protection from corrosion or Gas.. Are all budget kits with no premium features, so I think is! 0.0004 – 0.0008″ ) from deeper within the substrate material used and its durability unparalleled. High wear resistant coatings, as well as excellent sliding and running properties is., followed by a diffusion layer is porous, which lends to the tooth! Generically, think of `` melonite '' being the process alloying elements influence, to pre-heat furnace to! Pulled from deeper within the substrate will influence which properties are principally and! Thinner for identical nitrocarburizing parameters related topics ) is obtained through melonite and QPQ greatly improves the wear of! A function of nitrocarburizing duration Consists of epsilon iron nitride with about 6-9 nitrogen..., melonite vs nitride barrel life is all dependent on how you treat it QPQ... Chemical solution for either salt bath ferritic nitrocarburizing on your choice of,! Process, which lends to the lubricity of the nitrocarburized samples content of the nitrocarburized.... On alloyed steels is greatly improved are affected used and its durability is unparalleled by black. Improved fatigue strength nitriding but uses a patented thermochemical treatment for improving surface of! Is 3-4 times lower than that achieved with the gun shortstroking and not running as.! Melonite QPQ™ are thermochemical processes intended for the same thing and better than chrome lined Coating! ) compound layer layer ranges from approximately HV 700 on alloyed steels to 930°F...

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