Quenching of alloy steel is to heat the steel to a temperature above the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel), keep it warm for a period of time to make it fully or partially austenitized, and then cool it at a temperature greater than the critical cooling rate. The heat treatment process is to rapidly cool to below Ms (or isothermally close to Ms) to perform martensite (or bainite) transformation. The solid solution treatment or heat treatment process with rapid cooling process of aluminum alloy, copper alloy, titanium alloy, tempered glass and other materials is usually called quenching.
Purpose of quenching:
1) Improve the mechanical properties of alloy metal products or parts. For example: improving the hardness and wear resistance of tools, bearings, etc., increasing the elastic limit of springs, improving the comprehensive mechanical properties of shaft parts, etc.
2) Improve the material properties or chemical properties of some special steels. Such as improving the corrosion resistance of stainless steel and increasing the permanent magnetism of magnetic steel.
Post time: Mar-12-2024
