焊接二次热循环对T23钢粗晶区再热裂纹敏感性的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.012.012

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Abstract The coarse-grained heat-affected zone (CGHAZ) and reheat coarse-grained heat-affected zone (reheat CGHAZ) experienced different second thermal cycle of T23 steel were produced by a Gleeble-3500 thermo-mechanical simulator, and then strain to fracture (STF) tests were carried out. Results showed that CGHAZ experienced thermal cycle of 1 350 ℃ or 780 ℃ still had coarse grain, straight grain boundary configuration and high reheat cracking sensitivity, with a reduction of area of lower than 5%. CGHAZ experienced thermal cycle of 880 ℃, 950 ℃ or 1 100 ℃ had smaller grain size, zigzag grain boundary and low reheat crac-king sensitivity, and the reductions of area were 24.67%, 16.6% and 7.24% respectively. Controlling the peak temperature of the second welding thermal cycle to the range of A_c1-A_c3 can reduce reheat cracking sensitivity.

Key words： T23 steel CGHAZ second welding thermal cycle reheat cracking

Published: 25 June 2017 Online: 2018-05-08

CLC number:

TG407

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	Articles by authors
	WANG Tiantian
	XU Mengjia
	XU Jijin
	YU Chun
	LU Hao

Cite this article:

WANG Tiantian,XU Mengjia,XU Jijin, et al. Influence of Second Welding Thermal Cycle on Reheat Cracking Sensitivity of CGHAZ in T23 Steel[J]. Materials Reports, 2017, 31(12): 56-59.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.012.012 OR https://www.mater-rep.com/EN/Y2017/V31/I12/56

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