+（86）13543460072     Mon-Fri  8:00 a.m.-18:p.m.

Untempered martensitic steel, while very hard, is too brittle to be useful for most applications. Amethod for alleviating this problem is call tempering.

Most applications require that quenched parts be tmpered. Tempering consists of heating steel below the lower critical temperature, to impart some toughness. Higher tempering temperatures, are sometimes used to impart further ductility. although some yield strength is lost.

Tempering may also be performed on normalized steels. Other methods of empering consist of quenching to a specific temperature, which is above the martensite start temperature, and then holding it there until pure bainite can form or internal stresses can be relieved. These include austempering and martempering.