回火温度对20CrMo钢组织性能的影响
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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.
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.
引文
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[2]李瑞彬,史艳兵,李岚.35Mn2钢抽油杆失效分析[J].热处理技术与装备,2007,28(4):45-47.
[3]姜玲.抽油杆失效原因分析及预防措施[J].石油工业技术监督,2003,19(10):17-18,21.
[4]师伟华.抽油杆断裂原因及预防措施[J].国外油田工程,2002,18(10):29-30.
[5]魏新春.一体式空心抽油杆采油技术研究[D].成都:西南石油大学,2008:1-2.
[6]赵晓,邢庆河,张士诚.空心抽油杆在油井举升中的应用[J].油气田地面工程,2006,25(7):5-6.
[7]张朋举,王语,殷志杰.D级镦锻式空心抽油杆的热处理工艺[J].金属热处理,2015,40(1):70-74.
[8]张朋举,韩军,鞠汉良.空心抽油杆螺纹黏结原因分析及预防[J].钢管,2014,43(5):48-51.
[9]王国正,张朋举,汪继刚.油井空心抽油杆杆头断裂失效分析[J].金属热处理,2015,40(2):200-203.
[10]俞彦勤,黄早文,邓小山.空心抽油杆镦锻工艺的实验研究[J].模具工业,2000(11):23.
[11]张骁勇,田晨超,高惠临.回火温度对X80钢级热煨弯管组织性能的影响[J].材料热处理学报,2012,33(5):59-63.