摘要
通过高温试验装置在模拟井下工况温度25～350℃范围内进行了316L不锈钢的拉伸试验。结合拉伸试验数据、拉伸后微观结构以及断口形貌对316L不锈钢的25～350℃范围内的拉伸变形行为进行了探讨。应用温加工变形理论,建立了316L不锈钢在井下温度场环境中的形变本构方程。基于拉伸试验数据,计算了应变速率因子Z,变形激活能Q,建立了316L不锈钢温变形过程的流变应力计算模型,为完井设计中膨胀管膨胀施工提供了参考依据。
Tensile tests of 316L stainless steel at 25-350 ℃ were carried out on a high temperature experimental device.Combination of tensile test data with analyses of microstructure and fracture surface of 316L stainless steel after the tensile tests,tensile deformation behavior of the steel was investigated.Based on deformation theory of warm processing,the expandable constitutive equation of 316L stainless steel at temperatures of simulated well field was built.Based on tensile test data,the strain rate factor Z and deformation activation energy Q was calculated,finally the flow stress calculation model for deformation at high temparatures of 316L stainless steel was established,which provided a basis for design of expandable tube.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2012年第9期49-54,共6页
Transactions of Materials and Heat Treatment
基金
国家高技术发展研究计划(863计划)(2006AA09Z330)
关键词
316L不锈钢
拉伸行为
动态应变时效
流变应力
本构方程
316L stainless steel
tensile process
dynamic strain aging
flow stress
expandable constitutive equation
