摘要
研究了镦锻式空心抽油杆用20Cr Mo钢经过二次淬火后在不同回火温度下的组织和性能变化规律。结果表明,随着回火温度的升高,材料的抗拉强度、屈服强度等强度指标呈现下降趋势,材料的断后伸长率、断面收缩率等塑性指标呈现上升趋势,但均高于原始材料的性能。对20Cr Mo钢进行二次淬火加高温回火后可得到回火索氏体组织,具备较高的强韧性,可推荐作为超高强度空心抽油杆的开发工艺。
The microstructure and properties change rules of 20 Cr Mo steel used for upsetting type hollow sucker rod under different tempering temperature after the secondary quenching process were investigated. The results showed that with the increase of tempering temperature, the strength indexes such as tensile strength, yield strength present a downward trend, and the plasticity indexes such as elongation after fracture and impact toughness increase, and higher than that of material under initial state. It can obtain tempered sorbite structure with better strength and impact toughness of 20 Cr Mo steel after the secondary quenching and high temperature tempering process, and this process can be recommended as an development process of ultra-high strength hollow sucker rod.
出处
《焊管》
2016年第5期8-11,共4页
Welded Pipe and Tube
关键词
空心抽油杆
二次淬火
20CrMo
组织
性能
hollow sucker rod
secondary quenching
20CrMo
microstructure
properties
