| 9%Ni钢焊接熔合区的氢致裂纹与马氏体带的关系 |
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| 引用本文： | 周昭伟,蔡宏彬,江崇华.9%Ni钢焊接熔合区的氢致裂纹与马氏体带的关系[J].焊接学报,1990(4). |
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| 作者姓名： | 周昭伟 蔡宏彬 江崇华 |
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| 作者单位： | 哈尔滨焊接研究所 工程师
(周昭伟)，哈尔滨焊接研究所 高级工程师
(蔡宏彬)，哈尔滨焊接研究所 工学硕士(江崇华) |
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| 摘 要： | 利用金相法、超高温显微镜及超高压透射电子显微镜技术,对9%Ni 钢焊接熔合区马氏体带的特性,拉应力对9%Ni 钢焊接熔合区组织,性能的影响进行了探讨。试验得出用Cr17Ni13Mn8W3奥氏体钢焊条焊接9%Ni 钢时,熔合区马氏体带中包含具有孪晶精细结构的马氏体,该马氏体带的相变滞后于热影响区的马氏体,其中的残余奥氏体稳定性不高,在拉应力作用或低温条件下易于转变成马氏体,从而增加了熔合区氢致裂纹倾向。提出了9%Ni 钢焊接熔合区氢致裂纹形成的模型。
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| 关 键 词： | 焊接 裂纹 马氏体 |
RELATIONSHIP BETWEEN MARTENSITE LAYER AND HYDROGEN-INDUCED CRACKING IN THE WELD BOND OF 9%Ni STEEL |
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| Senior Engineer Zhou Zhaowei Senior Engineer Cai Hongbin Marster Jiang Conghua.RELATIONSHIP BETWEEN MARTENSITE LAYER AND HYDROGEN-INDUCED CRACKING IN THE WELD BOND OF 9%Ni STEEL[J].Transactions of The China Welding Institution,1990(4). |
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| Authors: | Senior Engineer Zhou Zhaowei Senior Engineer Cai Hongbin Marster Jiang Conghua |
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| Affiliation: | Harbin Research Institute of Welding |
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| Abstract: | Characteristics of martensite layer in the weld bond of 9% Ni steel,effectsof tensile stress on the microstructure and mechanical properties of the weld bondwere investigated with metallography,ultra-high temperature microscopy and tran-smission electronic microscopy.It is revealed that the weld bond contains twinmartensite;martensite transformation in the weld bond lags behaind that inHAZ;tensile stress or low temperature may induce the residual austenite in thewartensite layer to transform into martensite,which enhances the tendency tohydrogen-induced cracking.A model of the formation of hydrogen-induced crackingin the weld bond of 9%Ni steel is proposed. |
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| Keywords: | Welding Cracking Martensite |
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