| 1500 MPa级40CrNi3MoV钢的氢脆敏感性 |
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| 引用本文： | 田野,王毛球,李金许,时捷,惠卫军,董瀚. 1500 MPa级40CrNi3MoV钢的氢脆敏感性[J]. 金属学报, 2008, 44(4): 403-408 |
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| 作者姓名： | 田野 王毛球 李金许 时捷 惠卫军 董瀚 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083;钢铁研究总院先进钢铁材料技术国家工程研究中心,北京,100081;钢铁研究总院先进钢铁材料技术国家工程研究中心,北京,100081;北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 通过慢应变速率拉伸实验研究了Si含量分别为0.25%和1.16%的1500 MPa级40CrNi3MoV钢的氢脆敏感性,即充氢后缺口试样抗拉强度下降率,冲击实验用来测试1 mA/cm2电流密度下充氢后试样的断裂韧性值,分析氢致裂纹的扩展方式.结果表明,由于Si抑制回火过程中碳化物的形核和长大,高Si含量的40CrNi3MoV钢中回火析出的碳化物被细化且弥散分布,作为氢陷阱使氢分布均匀,抑制了氢向裂纹尖端扩散,高Si含量的40CrNi3MoV钢的氢脆敏感性较低.
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| 关 键 词： | 马氏体钢 氢脆 断裂韧性 氢陷阱 |
| 文章编号： | 0412-1961(2008)04-0403-06 |
| 收稿时间： | 2007-09-27 |
| 修稿时间： | 2007-09-27 |
HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY OF 40CrNi3MoV STEELS WITH THE STRENGTH LEVEL OF 1500MPa |
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| TIAN Ye,WANG Maoqiu,LI Jinxu,SHI Jie,HUI Weijun,DONG Han. HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY OF 40CrNi3MoV STEELS WITH THE STRENGTH LEVEL OF 1500MPa[J]. Acta Metallurgica Sinica, 2008, 44(4): 403-408 |
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| Authors: | TIAN Ye WANG Maoqiu LI Jinxu SHI Jie HUI Weijun DONG Han |
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| Abstract: | Hydrogen embrittlement susceptibility of 40CrNi3MoV steels with Si contents of 0.25% and 1.16% and the strength level of 1500 MPa was investigated by means of slow strain rate tests. The reduction of notch tensile strength after introduction of hydrogen was used to characterize hydrogen embrittlement susceptibility and compact specimens were used to investigate hydrogen-induced crack propagation. Results show that the higher Si content 40CrNi3MoV steel was less susceptible to hydrogen embrittlement than the lower Si content 40CrNi3MoV steel with the same strength level of 1500 MPa, resulting from more and finer carbides which may act as hydrogen trapping sites and prevent hydrogen from diffusing to fracture process zone. |
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| Keywords: | martensitic steel hydrogen embrittlement KIH hydrogen trap site |
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