Features include using 9310 tool steel for the bolt, which is stronger and
nitriding the assembly to increase surface hardness, decrease resistance, and have superior corrosion resistance compared to typical chrome and phosphasted bolt carrier groups.
Melonite is a salt-bath
nitriding process that leaves a thick, corrosion-resistant, matte/satin hard surface that resists wear more effectively than black-oxide finishes.
In the two years since the last show, the company has added new prime approvals, made a company acquisition and invested heavily in new vacuum brazing and plasma
nitriding processes and equipment.
These processes can be to treat the whole gear or just focused on the teeth themselves and among the most common are carburizing, induction hardening and
nitriding.
Nitriding is used on motorsport wear parts to create fatigue resistance.
Suprapto et al., "The Role of Diffusion Media in
Nitriding Process on Surface Layers Characteristics of AISI 4140 with and without Hard Chrome Coatings," Tribology in Industry, vol.
changed the microstructure and performance of titanium alloy by
nitriding [14].
Technically, it's a QPC ("quench, polish, quench") ferritic nitrocarburizing (
nitriding) process.
In this method, an intermediate layer was introduced firstly at the 41Cr4 steel surface by traditional carburizing and
nitriding. Then a hard Cr coating was brush-plated on the intermediate layer.