95CrMo钎具用钢的动态与静态相变研究  

Researches on Dynamic and Static Transformations of 95CrMo Drill Steel

作　　者：王筑生[1] 余伟[2] 熊家泽[1] 唐文龙[1] 于嘉君[1] 张吉舟[1] 

机构地区：[1]首钢贵阳特殊钢有限责任公司,贵州贵阳550005 [2]北京科技大学,北京100083

出　　处：《凿岩机械气动工具》2015年第2期25-29,共5页Rock Drilling Machinery & Pneumatic Tools

基　　金：十二五"国家科技支撑计划课题2012BAE03B01子课题"电炉流程高品质中空钢关键技术

摘　　要：通过采用DIL805热膨胀仪和Gleeble3500热模拟试验机,研究了95Cr Mo钎具钢静态和动态转变。研究表明:当冷速低于5℃/s时,只有高温区域珠光体转变;当冷速介于5℃/s和7℃/s时,开始在中温区域发生贝氏体转变,即贝氏体的临界冷却速度Vk大致为6℃/s;当冷速大于15℃/s时,开始在低温区域发生马氏体转变,Ms点约为190℃。95Cr Mo钎具用钢网状碳化物的抑制取决于冷却速度与冷却终止温度。researches were made on the static and dynamic transformations of 95CrMo drill steel by the use of DILS05 thermal dilatometer and Gleeble3500 thermal simulation testing machine. The followings were observed during the researches： when the cooling rate was less than 5 ℃/s, the pearlitic transformation occurred only in the high-temper- ature zone; when the cooling rate ranged from 5 ℃ to7 ℃/s, the bainitic transformation started in the middle-tempera- ture zone, namely, Vk, the critical cooling rate for the bainite, approximated 6℃/s; when the cooling rate was higher than 15℃/s, the martensitic transformation went on in the low-temperature zone, and the Ms point was about 190℃. The restraining of network carbide in 95CrMo drill steel relied on the cooling rate and the cooling ending temperature.

关 键 词：相变 相变温度 CCT曲线 显微组织 网状碳化物 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]