摘要
ZG70Cr3N iMo耐磨铸钢空冷淬火即可获得较高的表面硬度,但冲击韧度不足,即使淬火后采用较高的回火温度仍不能确保良好的耐冲击性能。热处理工艺试验结果表明,采用950℃缓冷淬火、450℃回火缓冷的热处理工艺,可得到较均匀的硬度(约50 HRC),其马氏体组织也较为细小、均匀,从而满足球磨机衬板的使用要求。
ZG70Cr3NiMo wear-resistant cast steel part will provide higher surface hardness but insufficient impact toughness after air-quenching. Fine impact property of ZGTOCr3NiMo steel can＇t be obtainded even after high temperature tempering. The heat treatment process test reveals that relatively uniform hardness （about 50 HRC） and fine-uniform martensite can be obtained by means of quenching from 950 ℃ with a slow cooling rate and subse- quently tempering at 450 ℃ and slow clloing for ZG70Cr3NiMo steel, thus meeting the needs of ball mill liner in service.
出处
《热处理》
CAS
2009年第3期44-47,共4页
Heat Treatment
关键词
耐磨铸钢
热处理
球磨机衬板
缓冷
wear-resistant cast steel
heat treatment
ball mill liner
slow cooling
