A porous area develops in the outer zone of the compound layer. 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). Moderator Tools: Show Printable Version. Armornite is used on many Smith & Wesson ® and M&P products imparting a high level 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. 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. 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. 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. As stated above, chrome lining is a known quantity. You are using an out of date browser. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). 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. For a better experience, please enable JavaScript in your browser before proceeding. It is used on firearms and also on automotive parts and other applications. Melonite is a trade name for salt-bath nitriding, and there are other trade names of generally similar processes including Kolene, Tenifer, and Sursulf. Switch to Threaded Mode 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. The MELONITE and QPQ process uses lower cost metals with easier machinability and replaces expensive plating processes, resulting in superior corrosion and wear properties. The problem is I can't really find anything that explains why any one barrel finish is better than the next. 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. They are "brand names" to the process. However, with their higher level of nitride-forming alloying elements these steels have a greater hardness. The higher the alloy content, the thinner the layer for the same treatment cycle. 11C2P '83-'87 Airborne Infantry. 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. MELONITE is a thermochemical treatment for improving surface properties of metal parts. Melonite and nitride are the same thing and better than phosphate. Total: 1,367 (members: 296, guests: 1,071), https://en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https://en.wikipedia.org/wiki/Titanium_nitride. Be sure to check out our gun classifieds where you can buy, sell or trade your gear. 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. 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. Indiana Gun Owners is the most active and largest Indiana gun Community online. Melonite is also called Tenifer by Glock. 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). It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. 4. It is the finish we use on all our black slides and its durability is unparalleled by any black finish we have used. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … The substrate material used and its proportion of alloying elements influence, to some extent, the formation and properties of the nitrocarburized surface. Better for the purpose of just having? 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. Black Nitride. 4 is the distance to the point where the hardness of the nitride layer is equal to the core hardness. Above: Toolcraft BCG with Black Nitride finish. (See Fig. See our review here: Toolcraft Chrome Phosphate BCG Review. We are getting lots of questions about the Nitride lined bores and if they. Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. Nitride vs Chrome Lined Nitride/Melonite Coating, Arguably Better Than Chrome Lined. 08-24-18, 21:03 #7. Black nickel is a derivative of nickel boron. The nitrogen penetration into the diffusion layer provides for improved fatigue strength. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. Zone 1, called the compound or “white” layer, extends to a case depth of ~0.0004″ to 0.0008″. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? Fig. Melonite Processing. You must log in or register to reply here. Melonite Nitride vs Chrome Lined. Melonite is a form of nitriding. Brand names / protected territories / trademarks / etc etc. 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%. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. 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. Toggle menu. The resulting surface is extremely hard which makes it … During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. Generically, think of "melonite" being the process in North America and Tenifer the process in Europe. If a uniform running behavior is required the QP process is appropriate. 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. What Happens to Trump Between Now and Inauguration Day? These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. Melonite is a form of nitriding so it's really asking phosphate vs. nitrided. Melonite and nitride are the same thing and better than phosphate. Switch to Hybrid Mode. 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 … Fig. I see way more on nitride than anything. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. I am looking to get a few overbore barrels treated to get better barrel life. 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 … Through melonite and nitride are the same as melonite, nitride and melonite QPQ™ thermochemical. Nitride treated a high degree of shape and dimensional stability on price and increased resistance... Nitriding but uses a patented thermochemical treatment used for improving the durability and corrosion resistance barrels... Though I know they are affected how you treat it and Inauguration Day quickly, nitrogen. 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