X70管线钢管件制造热过程中的形变规律

基金项目:

国家自然科学基金资助项目(50374056)

中国石油重点实验室基金资助项目(ZYT-0208)

详细信息

Deformation Law in Fitting-manufacture Thermal Process of X70 Pipeline Steel

摘要: 采用Gleeble-1500热/力模拟压缩试验机研究了X70管线钢在管件制造热过程中的形变规律.结果表明:X70管线钢在管件制造热过程中存在动态回复型和动态再结晶型两种真应力-应变曲线.在高的形变温度和低的应变速率条件下,发生动态再结晶,其热变形方程式为=4×10-8σ10.27p exp(-Q/RT);峰值应力σp、峰值应变εp与Zener-Hollomon因子Z的关系分别为ln σp=1.869+0093lnZ、ln εp=-1.291＋0.021 ln Z;动态再结晶体积分数Xd=1-exp [-1.51(ε/εp-0.83)1.22].
- 管线钢 /
- 管件 /
- 高温形变 /
- 动态再结晶
Abstract: The deformation law in fitting-manufacture thermal process of an X70 grade pipeline steel was investigated using a Gleeble-1500 tester.There were two kinds of stress-strain curves of both dynamic recovery and dynamic recrystallization in thermal deformation process.Under the condition of high temperature and low strain rate,dynamic recrystallization occurred.The thermal deformation equation was =4×10-8σ10.27p exp(-Q/RT) and relations between σp of εp and Z were ln σp=1.869+0.093lnZ and ln εp=-1.291＋0.021 lnZ respectively.The volume fraction of dynamic recrystallization was Xd=1-exp[-1.51(ε/εp-0.83)1.22].
- pipeline steel /
- fitting /
- high-temperature deformation /
- dynamic recrystallization

[1]	Z245.11-1996,Steel Fittings[S].
[2]	王国栋,刘振宇,熊尚武.高强度低合金钢的控制轧制与控制冷却 [M].北京:冶金工业出版社,1992.
[3]	王有铭,李曼云,韦光.钢材的控制轧制与控制冷却 [M].北京:冶金工业出版社,1995.
[4]	钟云龙,刘国权,刘胜新,等.新型油井管钢33Mn2V的动态再结晶规律研究[J].钢铁,2003,38(2):42-45.
[5]	程晓茹,李虎兴,葛懋琦,等.管线钢X65高温变形动态再结晶规律研究[J].金属学报,1997,33(12):1275-1281.