摘要
采用热压愈合的实验方法,对碳钢氢腐蚀裂纹的愈合行为进行研究.结果表明,在热塑性变形条件下,经1000℃、压下率为40%、15 min短时间处理,能够基本消除碳钢试样内的氢蚀裂纹,局部未修复裂纹呈现为尺寸4μm^8μm的透镜状.与单纯高温愈合处理(1000℃循环热处理10 h)的实验结果相比,塑性形变可大大缩短裂纹愈合所需要的热处理时间。热塑性变形下的裂纹愈合进程及程度加大,且氢蚀裂纹内高压甲烷气体的分解不是裂纹愈合过程的控速步骤.
Healing of hydrogen - attacked （HA） cracks in carbon steel was studied by using hot press treatment. Under hot plastic deforming at 1000℃ and the deformation rate of 40%, the most of HA cracks can be recovered ment without press （cyclic heat treatment between room temperature and 1000℃ for 10 h）, both the healing degree and speed under hot plastic deforming are improved obviously. There are not distinct difference of healing results between the direct hot - press healing and pre - heated treatment before hot - press healing. That means the decomposition of methane in HA cracks is not the key step during the whole healing process.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2007年第2期104-108,共5页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金(50401016)
关键词
碳钢
氢腐蚀
裂纹
愈合
carbon steel, hydrogen attack, crack, healing
