摘要
根据低碳马氏体型钢20Cr2Ni4A的材料特点,通过提高冶金质量获得高纯净度及成分、组织均匀的原材料。结果表明,将有利于提高淬透性的成分控制在中上限、加入细晶元素,及采取930℃高温正火+610℃高温回火+900℃高温淬火+200℃低温回火的热处理工艺,获得回火马氏体组织,降低材料脆性转变温度及缺口敏感性,满足石油吊环用钢的高强和抗低温冲击要求。
A low carbon martensitic steel 20Cr2Ni4 A was prepared through improving the metallurgical quality to obtain high purity and uniform microstructure. The results show that by controling the composition to improve the hardenability at the upper limit,adding elements to refine the grain,normalizing at 930 ℃ and tempering at 610 ℃ and finally quenching at 900 ℃ and tempering at 200 ℃,the microstructure of tempered matensite was obtained which can reduce material brittle transition temperature and notch sensitivity,and meet the requirements of high strength and impact resistance at low temperature for rings used in petroleum industry.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第4期175-177,共3页
Heat Treatment of Metals
关键词
20CR2NI4A钢
高强韧化
力学性能
热处理
20Cr2Ni4A steel
high strength and toughness
mechanical property
heat treatment
