Shenzhen Su's heat treatment of heat treatment gas sources and metallurgical problems in the standards
1: the heat treatment industrial use natural gas, propane gas, acetylene gas, methanol gas in addition to the provisions of inorganic and organic sulfur, also the water is also required, and stressed that the lower the better.
2: carburizing and carbonitriding surface of non martensite microstructure suggest the "shallow corrosion".
3: the carburizing and quenching parts metallographic examination suggested by residual austenite above 800 times to check.
4: carbonitriding metallographic examination suggested surface loose layer using "no corrosion".
5: the use of heat treatment in the industrial propane, ammonia, methanol, process materials recommended reliable, long-term, stable equipment cleaning (removal of moisture, organic sulfur, sulfur and other harmful substances), improve the heat treatment quality.
6: the purified natural gas carburizing can not only improve the quality of the products (after carburizing and hardening, the surface of non martensite is very small, the superficial corrosion ≤ 3um; the surface hardness after conversion to reach more than 61HRC; products bright silver without carbon black; carbide extreme dispersion) and improve the carburizing speed, but also has prolonged oxygen probe and equipment component service life, reduce the air consumption and process travel cost.
We