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王少清, 张宝昌, 焦伟, 葛兆祥. 16MnR钢高压除氧器焊接接头裂纹的成因[J]. 焊接学报, 1994, (1): 16-22.
引用本文: 王少清, 张宝昌, 焦伟, 葛兆祥. 16MnR钢高压除氧器焊接接头裂纹的成因[J]. 焊接学报, 1994, (1): 16-22.
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Wang Shaoqing, Zhang Baochang, Jiao Wei, Ge Zhaoxiang. Cause of cracks in welded joints of higher-pressure deaerator made of 16MnR steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1994, (1): 16-22.
Citation: Wang Shaoqing, Zhang Baochang, Jiao Wei, Ge Zhaoxiang. Cause of cracks in welded joints of higher-pressure deaerator made of 16MnR steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1994, (1): 16-22.
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16MnR钢高压除氧器焊接接头裂纹的成因

Cause of cracks in welded joints of higher-pressure deaerator made of 16MnR steel

    摘要
  • 摘要: 本文采用电镜、X射线衍射分析、裂纹扩展速率da/dN及门槛值△Kth试验,研究了大力发电厂16MnR钢高压除氧器焊接接头裂纹的形成原因.结果表明,原发裂纹为延迟裂纹,运行工况下,裂纹以应力腐蚀裂纹(SCF)方式扩展。

     

    Abstract: In this paper,the cause of cracks in the welded joints of higher-pressure deaertor made of 16MnR steel for thermal power plant was studied with electron mieroscopy,X-ray spectroscopic analysis,da/dN and △Kth test.The results show that the ckaeks were the delay cracking which propagated in a way of stress corrosion craeking in operation.

     

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