热塑性变形条件下碳钢氢腐蚀裂纹的愈合

中国腐蚀与防护学报

2007, Vol. 27

Issue (2): 104-108

研究报告

本期目录 | 过刊浏览

热塑性变形条件下碳钢氢腐蚀裂纹的愈合

董超芳; 李晓刚

北京科技大学材料学院腐蚀与防护中心

CRACK HEALING OF HYDROGEN-ATTACKED CRACKSIN CARBON STEEL UNDER HOT PLASTIC DEFORMATION

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北京科技大学材料学院腐蚀与防护中心

全文: PDF(1473 KB)

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4 μm～8 μm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.

关键词 ：碳钢, 氢腐蚀, 裂纹, 愈合

Abstract：Healing of hydrogen-attacked (HA) cracks in carbon steel was studied by using hot press treatment.Under hot plastic deforming at 1000°C and the deformation rate of 40%,the most of HA cracks can be recovered completely within 15 min.Partial HA cracks,which has not been recovered by hot-press treatment,present the spherical cap-shaped with the length of about 4 μm～8 μm.Comparing with the results of high temperature treatment 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.

Key words： Carbon steel hydrogen attack crack healing

收稿日期: 2005-07-27

ZTFLH:

TG111.91

通讯作者: 董超芳 E-mail: dongchf@sina.com

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引用本文:

董超芳; 李晓刚 . 热塑性变形条件下碳钢氢腐蚀裂纹的愈合[J]. 中国腐蚀与防护学报, 2007, 27(2): 104-108 .
. CRACK HEALING OF HYDROGEN-ATTACKED CRACKSIN CARBON STEEL UNDER HOT PLASTIC DEFORMATION. J Chin Soc Corr Pro, 2007, 27(2): 104-108 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2007/V27/I2/104

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