尹航,李倩,李金许,张智,岩雨,宿彦京.预充氢马氏体时效钢的氢脆性能研究[J].表面技术,2016,45(7):22-29.
YIN Hang,LI Qian,LI Jin-xu,ZHANG Zhi,YAN Yu,SU Yan-jing.Study on Hydrogen Embrittlement for Pre-charged Maraging Steel[J].Surface Technology,2016,45(7):22-29
预充氢马氏体时效钢的氢脆性能研究
Study on Hydrogen Embrittlement for Pre-charged Maraging Steel
投稿时间:2016-03-12  修订日期:2016-07-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.07.004
中文关键词:  预充氢  马氏体时效钢  慢应变速率拉伸  氢脆  氢扩散系数  沿晶断裂
英文关键词:precharged hydrogen  maraging steel  slow strain rate stretching  hydrogen embrittlement  hydrogen diffusion coefficient  intergranular crack
基金项目:国家自然科学基金面上项目(51571029, 51071025);油气藏地质及开发工程国家重点实验室(西南石油大学)资助项目(PLN1204)
作者单位
尹航 北京科技大学 腐蚀与防护中心环境断裂教育部重点实验室,北京 100083 
李倩 北京科技大学 腐蚀与防护中心环境断裂教育部重点实验室,北京 100083 
李金许 北京科技大学 腐蚀与防护中心环境断裂教育部重点实验室,北京 100083 
张智 西南石油大学 油气藏地质及开发工程国家重点实验室,成都 610500 
岩雨 北京科技大学 腐蚀与防护中心环境断裂教育部重点实验室,北京 100083 
宿彦京 北京科技大学 腐蚀与防护中心环境断裂教育部重点实验室,北京 100083 
AuthorInstitution
YIN Hang Key Laboratory of the Ministry of Education (MOE) for Environmental Fracture, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 
LI Qian Key Laboratory of the Ministry of Education (MOE) for Environmental Fracture, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 
LI Jin-xu Key Laboratory of the Ministry of Education (MOE) for Environmental Fracture, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 
ZHANG Zhi State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China 
YAN Yu Key Laboratory of the Ministry of Education (MOE) for Environmental Fracture, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 
SU Yan-jing Key Laboratory of the Ministry of Education (MOE) for Environmental Fracture, Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 
摘要点击次数:
全文下载次数:
中文摘要:
      目的 研究预先存在于试样中的氢对材料力学性能的影响。 方法 对固溶态和三种时效态 18Ni马氏体时效钢,采用双电解槽装置测量了其氢扩散系数,用热分析法获得了材料的氢扩散激活能。采用慢应变速率拉伸法评估了在预充氢后镀镉密封试样的力学性能,并由此评估它们的氢脆敏感性。结果 固溶态试样的氢扩散系数最大,为 1.40×10?8 cm2/s;对时效态试样,当时效温度分别为 465、 490、530 ℃时,氢扩散系数分别为 6.23×10?9、 5.52×10?9、 2.84×10?9 cm2/s,即随时效温度升高,扩散系数降低。而扩散激活能正好相反,固溶态的最小,其他的依次逐渐升高。四种试样均显示出氢脆敏感性,且随着预充氢电流密度升高而增大。 T465 和 T490 的氢脆敏感性均大于 58%, T530 的氢脆敏感性小于40%。四种试样的断口形貌均表现为由中心起裂,向周围呈放射状扩展。中心起裂源处为典型的沿晶开裂,扩展区为准解理开裂。 结论 过时效态样品的抗氢脆性能最好。 预先存在于试样中的氢在拉伸过程中向中心富集,造成中心沿晶开裂,与动态充氢拉伸断口相反。
英文摘要:
      Objective To study the effect of pre-existed hydrogen in specimen on the mechanical properties. Methods For a type of solution-treated and three types of heat-treated 18Ni maraging steels, electrochemical permeation was employed to determine effective hydrogen diffusion coefficient (Deff); thermal desorption analysis (TDA) was carried out to assess activity energies (Ea); slow strain rate tensile tests were performed to characterize the mechanical properties and further evaluate the hydrogen embrittlement (HE) susceptibility of pre-charged and cadmium coated specimens in comparison of uncharged specimens. Results The results showed that Deff of the solution-treated specimen was 1.40×10?8 cm2/s, which was the largest among four specimens. Deff of three heat-treated specimens gradually decreased with the rise of aging temperature, which were 6.23×10?9 cm2/s for 465 ℃, 5.52×10?9 cm2/s for 490 ℃ and 2.84×10?9 cm2/s for 530 ℃ respectively; whereas, Ea gradually rose. Four specimens all exhibited HE susceptibility, which increased with the rise of charging current density. The HE susceptibility indexes for T465 and T490 were both higher than 58%, while that for T530 was smaller than 40%. In the fracture morphology of the four specimens, cracks initiated from the centre and radiated to surrounding. Centre crack source was a typical intergranular feature, while the extension area was quasi-cleavage cracking. Conclusion The hydrogen embrittlement of overaging samples is the best. The pre-existed hydrogen in the sample gathers in the center during tensile test, which causes intergranular crack in the center and reverse to dynamic hydrogen charging tensile fracture.
查看全文  查看/发表评论  下载PDF阅读器
关闭

关于我们 | 联系我们 | 投诉建议 | 隐私保护 | 用户协议

您是第19851066位访问者    渝ICP备15012534号-3

版权所有:《表面技术》编辑部 2014 surface-techj.com, All Rights Reserved

邮编:400039 电话:023-68792193传真:023-68792396 Email: bmjs@surface-techj.com

渝公网安备 50010702501715号