| http://www.w3.org/ns/prov#value | - Patent Literature 1: the Japanese PatentLaid Open Gazette Sho. 61-149424 Patent Literature 2: the Japanese Patent Laid Open Gazette Hei. 7-119831 However, the hardness of the quenched part treated by the laser quenching art or the high frequency quenching art is about 600 to 800 Hv. The structure of the quenched part is not perfectly uniform and structures such as martensite, bainite andretained a
|
