摘要
通过对韧-脆转变温度及冲击断口的韧-脆断裂转变趋势的分析,研究了Cr-Co-Mo-Ni轴承钢经不同温度固溶热处理后的韧-脆转变温度及其影响因素。结果表明:在1 000、1 030和1 060℃固溶,其韧-脆转变温度为100℃以上,在1 090℃固溶,韧-脆转变温度为70℃,且在-50℃钢的冲击功能保持在47J以上,1 120℃固溶,韧-脆转变温度为52℃,且-50℃的冲击功为46J以上。随固溶温度的增加,原始晶粒增大,韧-脆转变温度却降低,这是晶界处大颗粒M6C碳化物导致。
The ductile-brittle transition temperature and its influencing factors of Cr -Co- Mo Ni bearing steel after solid solution heat treatments at different temperatures were investigated through analysis on ductile brittle transition temperature and the trend of ductile-brittle transition of impact fracture. Results show that the ductile brittle transition temperatures of the samples after solid solutions at 1000, 1 030 and 1 060 ℃ are above 100 ℃. After sol id solution at 1 090 ℃, the ductile-brittle transition temperature is 70 ℃ and the impact energy is above 47 J at --50 ℃. After solid solution at 1 120 ℃, the ductile-brittle transition temperature is 52 ℃and the impact energy is above 46 J at -50 ℃. Ductile brittle transition temperature reduces and original grain size increases with the increasing of solid solution temperature because of big precipitations of M6 C at grain boundary.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2015年第11期66-72,共7页
Journal of Iron and Steel Research
基金
国家"863"计划资助项目(2012AA03A503)
关键词
轴承钢
韧-脆转变温度
固溶温度
晶粒度
碳化物
bearing steel
ductile-brittle transition temperature
temperature of solid solution
grain size
carbide
作者简介
王博（1990-），男，硕士生；E—mail：wangbokmust@163．com
