What is QPQ finish?
Quench-Polish-Quench (QPQ) Process QPQ is prescribed when a smooth surface finish and maximum corrosion protection are required. For many applications, this finishing process provides a surface condition that protects against corrosion and wear superior than hard chrome or nickel plating.
How hard is Qpq?
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. The hardness is maintained up to about 930°F and extends the surface life of steel tools and components exposed to heat.
What is SBN coating?
Salt bath nitrocarburizing (SBN) is a popular alternative to hard chromium and physical vapor deposition (PVD). More effective than hard chromium, sBN is extremely economical, with an array of well-documented benefits. Cost-EffECtivE HigH PErformanCE Coating. enhanced wear resistance. increased corrosion resistance.
What is black nitride Qpq?
Quench polish quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. It is sometimes known by the brand name of Tufftride, Tenifer or Melonite. Three steps are involved: nitrocarburize (“quench”), polish, and post-oxidize (“quench”).
Is QPQ a coating?
Quench Polish Quench or QPQ coating is a sophisticated heat treatment for ferrous metals such as steels and iron. The main idea to use the QPQ process is to achieve very high corrosion resistance and lubricity. This makes it ideal for many different applications.
Is QPQ the same as nitride?
Faxon typically uses the terms “nitride” and “QPQ” to refer to how our barrels are processed. “Melonite,” “Isonite,” etc are all branding terms for various similar nitride processes. Typically, these will each have a small tweak compared to the other, but they are largely the same in terms of performance.
Is Qpq the same as nitride?
How many rounds will a nitride barrel last?
The nitrided barrels lasted an average of 28,000 shots before rejection.
Can you QPQ stainless steel?
In general, stainless steels are not treated with QPQ. There are nitriding processes for stainless steels, e.g.: http://www.nitrex.com/english/technologies_modern….
Is nitride better than chrome lined?
Both can be precise, but Nitride will always be more accurate all things being equal. Nitride “locks in” the bore, chrome will add material to it.
Which is better phosphate or nitride barrel?
On the basis of performance, nitride wins. For nostalga, phosphate wins. The battle between these two smooth finishes comes down to cost vs performance. Both are excellent finishes that are very hard, smooth and high performing.
What is the best AR-15 barrel material?
So, which steel is the best AR-15 barrel material then? Some manufacturers prefer to use 4140 or 4150 steel while others prefer to use 416 SS or 416R steel for its properties. Some other manufacturers prefer to chrome-line the inside of their AR barrels and some do not.