摘要
采用Gleeble 3800试验机对TP321不锈钢的高温热影响区（1300℃,HAZ）进行热模拟试验后进行稳定化处理,在电解充氢条件下进行慢应变拉伸试验研究,分析稳定化处理对TP321不锈钢氢脆性能的影响。结果表明：稳定化处理会导致321不锈钢高温热影响区抗拉强度和断后伸长率大幅降低,降幅分别为7%和29%,同时氢脆敏感性系数增加;慢拉伸试样断口分析表明无论稳定化处理与否,氢才是断裂模式发生变化的直接原因;稳定化处理并不能改善TP321不锈钢焊接热影响区的抗氢脆性能。
The thermal simulation test of heat affected zone（ HAZ） of TP321 stainless steel at 1300 ℃ was carried out by a Gleeble 3800 test machine and then the sample was subjected to stabilization treatment. The slow strain tensile test was carried out under the condition of electrolytic hydrogen charging. The effect of stabilization treatment on hydrogen embrittlement of the TP321 stainless steel was analyzed.The results show that due to the stabilization treatment,the tensile strength and elongation in high temperature heat affected zone of the TP321 stainless steel decrease significantly by 7% and 29%,respectively,and the sensitivity coefficient of hydrogen embrittlement increases. The fracture analysis results of slow tensile specimen show that the hydrogen is the key factor of the change of fracture mode,regardless of stabilization treatment,and the stabilization treatment cannot improve the hydrogen embrittlement resistance of welding heat affected zone of the TP321 stainless steel.
作者
徐秀清
林罡
牛靖
李发根
来维亚
XU Xiu-qing;LIN Gang;NIU Jing;LI Fa-gen;LAI Wei-ya(State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials,Xi＇ an 710077,China;R＆D Center of TGRI,CNPC,Xi＇ an 710077,China;Xi＇ an Changqing Technology Engineering Co Ltd,Xi＇ an 710018,China;School of Materials Science and Engineering,Xi＇ an Jiaotong University,Xi＇ an 710049,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2018年第7期99-105,共7页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(21506256)
中石油科学研究与技术开发项目(2017D-2307)
关键词
TP321不锈钢
热模拟试验
高温热影响区
稳定化处理
氢脆性能
TP321 stainless steel
thermal simulation test
high-temperature heat affected zone
stabilization treatment
hydrogen embrittlement
