摘要
一般电机硅钢片冲裁用凸模采用Cr12钢制造,热处理工艺是淬火+低温回火。由于Cr12属莱氏体钢,共晶碳化物虽经锻碎,但仍粗大且有棱角,致使凸模强韧性不足,寿命不高。改用9SiCr钢并采用刃口双液淬火、整体等温淬火热处理,使碳化物均匀圆整,提高了刃口硬度、耐磨性和凸模整体的强韧性,使用寿命显著提高。
The punch used for motor silicon steel punching is usually made of Cr12 steel, and its heat treatment process is quenching and low temperature tempering. The Cr12 steel is a kind of Ledeburite steel. Although eutectic carbides are smashed by forging, they are still coarse with ridgy which lead to toughness insufficient and not enough service life of the tool. While 9SiCr steel is used to replace Cr12 steel and a new process of double-solution quenching for edge and the whole isothermal quenching is adopted, the carbides become even in size and circular, the hardness and wear resistance of the edge, and the strength and toughness of the bulk punch are improved. Its service life is eventually enhanced.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2005年第4期74-76,共3页
Heat Treatment of Metals
关键词
凸模
CR12钢
9SICR钢
双液淬火
等温淬火
punch
Cr12 steel
9SiCr steel
double-solution quenching
isothermal quenching