INVESTIGATION ON WATER COOLING METHOD FOR IMPROVING STRESS CORROSION RESISTANCE OF WELDED PIPES

J Chin Soc Corr Pro

1998, Vol. 18

Issue (3): 187-192 DOI:

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INVESTIGATION ON WATER COOLING METHOD FOR IMPROVING STRESS CORROSION RESISTANCE OF WELDED PIPES

LIU Ming WANG Yong LIU Guang-rui(Tianjing University; Tianjing 300072)TANG Mu-yao MENG Fan-sen(Xi'an Jiaotong University)

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Abstract Thermo-elastic-plastic finite element method was employed to investigate the welding stress distribution in the multipass-girth-butt welded pipes of austenitic stainless steel (1Cr18Ni9Ti) and mild steel(0.2%C). The computed results showed that significant biaxial tensile residual stresses existed in the weld vicinity region of the inner surface of the pipes under the normal process condition. Water cooling could effectively adjust the residual stress distribution and obtain the biaxial compression residual stresses on the whole HAZ of the pipe inner surface. The residual stress measurements verified the conclusion. The compression residual stresses of the multipass-girth-butt welded 1Cr18Ni9Ti pipe could remarkably improve its resistance to stress corrosion cracking.

Key words: Pipe Welded joint Water cooling method Stress corrosion Residual stress distribution

Received: 25 June 1998

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LIU Ming WANG Yong LIU Guang-rui(Tianjing University; Tianjing 300072)TANG Mu-yao MENG Fan-sen(Xi'an Jiaotong University). INVESTIGATION ON WATER COOLING METHOD FOR IMPROVING STRESS CORROSION RESISTANCE OF WELDED PIPES. J Chin Soc Corr Pro, 1998, 18(3): 187-192.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I3/187

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5 董俊明.低碳钢焊接接头应力腐蚀破裂行为的研究,西安交通大学硕土论文,1984

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