| 铁素体/珠光体界面对耐酸管线钢氢致开裂敏感性的影响 |
| |
| 作者姓名： | 曹成思 刘静 黄峰 胡骞 王贞 彭志贤 |
| |
| 作者单位： | 1.武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北 武汉,430081;2. 武汉科技大学湖北省海洋工程材料及服役安全工程技术研究中心,湖北 武汉,430081,1.武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北 武汉,430081;2. 武汉科技大学湖北省海洋工程材料及服役安全工程技术研究中心,湖北 武汉,430081,1.武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北 武汉,430081;2. 武汉科技大学湖北省海洋工程材料及服役安全工程技术研究中心,湖北 武汉,430081,1.武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北 武汉,430081;2. 武汉科技大学湖北省海洋工程材料及服役安全工程技术研究中心,湖北 武汉,430081,1.武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北 武汉,430081;2. 武汉科技大学湖北省海洋工程材料及服役安全工程技术研究中心,湖北 武汉,430081,1.武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北 武汉,430081;2. 武汉科技大学湖北省海洋工程材料及服役安全工程技术研究中心,湖北 武汉,430081 |
| |
| 基金项目： | 国家自然科学基金资助项目(51871171)；2018年中央引导地方科技发展专项(2018ZYYD026). |
| |
| 摘 要： | 利用OM、SEM、EBSD、TEM等手段,分别对热轧态和退火态耐酸管线钢的微观组织、晶界分布、位错及析出相进行表征,测试了不同组织管线钢的氢致开裂(HIC)敏感性,计算分析了有效氢扩散系数、氢陷阱密度及其对不同组织的氢捕获效率,重点探讨了铁素体/珠光体(F/P)界面对耐酸管线钢HIC敏感性的影响。结果表明,随着管线钢珠光体含量的增加,F/Fe_3C界面及F/P界面越多,二者作为不可逆氢陷阱会阻碍氢的扩散,提高氢的捕获效率,有效氢扩散系数降低,管线钢的HIC敏感性提高;F/P界面附近位错的聚集会加速氢原子向高界面能的F/P界面聚集,使氢致裂纹起始于F/P界面处,并沿着F/P界面扩展。
|
| 关 键 词： | 耐酸管线钢 氢致开裂(HIC) 铁素体/珠光体界面 氢捕获效率 |
| 收稿时间： | 2019/12/16 0:00:00 |
Hydrogen-induced cracking sensitivity of acid-resistant pipeline steel at ferrite/pearlite interface |
| |
| Authors: | Cao Chengsi Liu Jing Huang Feng Hu Qian Wang Zhen and Peng Zhixian |
| |
| Affiliation: | 1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Engineering Technology Research Center of Marine Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, China,1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Engineering Technology Research Center of Marine Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, China,1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Engineering Technology Research Center of Marine Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, China,1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Engineering Technology Research Center of Marine Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, China,1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Engineering Technology Research Center of Marine Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, China and 1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Hubei Engineering Technology Research Center of Marine Materials and Service Safety, Wuhan University of Science and Technology, Wuhan 430081, China |
| |
| Abstract: | By means of OM, SEM, EBSD, TEM, the microstructure, grain boundary distribution, dislocation and precipitates of hot-rolled and annealed acid-resistant pipeline steel were characterized respectively, the hydrogen-induced cracking (HIC) sensitivity of pipeline steel with different microstructure was tested, and the hydrogen trapping efficiency was investigated by measuring the effective hydrogen diffusivity and hydrogen trapping density. The effects of ferrite/pearlite (F/P) interface on the HIC sensitivity of pipeline steel were discussed accordingly. The results show that with the increase of pearlite content of pipeline steel, more ferrite/Fe3C interface and ferrite/pearlite interface are observed in the microstructure, which act as the irreversible hydrogen traps and will in turn hinder the diffusion of hydrogen, improve the hydrogen capture efficiency, and reduce the effective hydrogen diffusivity; as a result, the HIC sensitivity of pipeline steel is improved. Moreover, the gathering of dislocations near the F/P interface will accelerate the accumulation of hydrogen atoms near the F/P interface with high interface energy. This will lead to the initiation and propagation of hydrogen-induced crack at the F/P interface. |
| |
| Keywords: | acid-resistant pipeline steel HIC F/P interface hydrogen trapping efficiency |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《》浏览原始摘要信息 |
|
点击此处可从《》下载全文 |
|
