Welding Thermal Crack Sensitivity Simulation of 9%Ni Steel

Zong Bin You; Ye Zheng Li

doi:10.4028/www.scientific.net/MSF.850.230

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HomeMaterials Science ForumMaterials Science Forum Vol. 850Welding Thermal Crack Sensitivity Simulation of...

Welding Thermal Crack Sensitivity Simulation of 9%Ni Steel

Abstract:

In this paper, the application of 9% Ni steel in natural gas storage tanks and the welding thermal crack tendency of 9% Ni steel were studied. For the section shrinkage and breaking strength of tensile specimens at different temperature, the high temperature tensile test (600°C~1450°C) of 9%Ni steel was carried out by Gleeble 3500 thermal simulation machine. The nil-ductility transition temperature (NDT), nil-ductility stength temperature (NST) and ductility recovery temperature (DRT) of 9%Ni steel were identified. The result showed that the NDT for 9% Ni steel was 1400°C, the NST was 1430°C, the DRT is 1370°C, and the brittle temperature range (BTR) was 60°C. In this study, the welding hot crack of 9% Ni steel was a little sensitive.

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Periodical:

Materials Science Forum (Volume 850)

Pages:

230-234

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.850.230

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Online since:

March 2016

Authors:

Zong Bin You*, Ye Zheng Li

Keywords:

9%Ni Steel, Heat Simulation, NDT, NST, Welding Thermal Crack

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