Analysis and Improvement on Broken Coupling Bolts

YOU Lei; DENG Xiao-yun; CHEN Rong; LIANG Xia-xiang

Volume 34 Issue 6

Mar. 2025

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YOU Lei, DENG Xiao-yun, CHEN Rong, LIANG Xia-xiang. Analysis and Improvement on Broken Coupling Bolts[J]. Nuclear Power Engineering, 2013, 34(6): 153-155.

Citation:

YOU Lei, DENG Xiao-yun, CHEN Rong, LIANG Xia-xiang. Analysis and Improvement on Broken Coupling Bolts[J]. Nuclear Power Engineering, 2013, 34(6): 153-155.

YOU Lei, DENG Xiao-yun, CHEN Rong, LIANG Xia-xiang. Analysis and Improvement on Broken Coupling Bolts[J]. Nuclear Power Engineering, 2013, 34(6): 153-155.

Citation:

YOU Lei, DENG Xiao-yun, CHEN Rong, LIANG Xia-xiang. Analysis and Improvement on Broken Coupling Bolts[J]. Nuclear Power Engineering, 2013, 34(6): 153-155.

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Analysis and Improvement on Broken Coupling Bolts

China Nuclear Power Engineering Company, Ltd. ShenZhen, Guangdong, 518120, China

Received Date: 2012-09-02
Rev Recd Date: 2013-10-14

Available Online: 2025-03-08

Abstract

Abstract

An extensive investigation on chemical element, fracture surface and so on was conducted into these broken bolts. The investigation showed that the broken bolts resulted from hydrogen-brittleness, high-hardness, high-strength and residual hydrogen. In order to improve the quality of bolts, the supplier changed the design model, improved the surface treatment method, and decreased the strength of bolts. The bolts after 2ndimprovement satisfied the requirements for safety operation.
- Nuclear power station,
- Hydrogen-brittleness,
- High-strength bolt,
- Stress concentration,
- Broken

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