the high hardness of the application of martensite

Martensite and high hardness application in wear parts, is of great practical value, due to the high strength martensite, usually easy to form a brittle steel, so, at a moderate temperature of billet reheating forming is called tempering heat treatment method, it can eliminate the quenching stress, makes part of martensite can be obtained through the quenching hardness reduced some, get toughness good micro facies, tempering temperature is 180-180 degrees, because carbon is contained in martensite, with burning the microstructure of the forward part of ferrite and cementite phase.

Original article link：http://www.zcmim.com/article/the-high-hardness-of-the_1.html