High Temperature Plasticity of X65 Grade Cu-bearing Pipeline Steel

LI Yuchen; SHI Xianbo; YAN Wei; SHAN Yiyin; REN Yi; SHEN Minggang; WANG Yiyong

doi:10.11973/jxgccl202207016

Materials and Mechanical Engineering > 2022 > 46(7): 90-94. > DOI: 10.11973/jxgccl202207016

LI Yuchen, SHI Xianbo, YAN Wei, SHAN Yiyin, REN Yi, SHEN Minggang, WANG Yiyong. High Temperature Plasticity of X65 Grade Cu-bearing Pipeline Steel[J]. Materials and Mechanical Engineering, 2022, 46(7): 90-94. DOI: 10.11973/jxgccl202207016

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High Temperature Plasticity of X65 Grade Cu-bearing Pipeline Steel

1. School of Materials and Metallurgy, Liaoning University of Science and Technology, Anshan 114051, China;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
3. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, China

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Received Date: March 09, 2021
Revised Date: January 26, 2022

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Abstract

Abstract

The high temperature tensile test of X65 grade low carbon low nickel Cu-bearing pipeline steel containing 1.8wt% copper and 1.0wt% nickel was carried out with Gleeble-3800 thermal simulation testing machine to study the high temperature plasticity at different temperatures (850-1 300℃). The results show that the tensile strength of the Cu-bearing pipeline steel showed an overall downward trend with increasing test temperature; the tensile strength at 850℃ reached 105 MPa, while the tensile strength at 1 300℃ was reduced to about 30 MPa. With increasing test temperature, the percentage reduction of area of the Cu-bearing pipeline steel showed an overall increase trend. When the test temperature was higher than 1 050℃, the percentage reduction of area was above 80%, showing good high temperature plasticity; the percentage reduction of area at 850-1 000℃ was about 60%, indicating the large deformation of the pipeline steel should be avoided in the range of 850-1 000℃. When the test temperature was higher than 1 050℃, the improvement of plasticity was related to dynamic recrystallization. In the continuous casting temperature range (1 100-1 250℃), the Cu-bearing pipeline steel had excellent high temperature plasticity, which could ensure the metallurgical quality of the continuous casting billet.
- Cu-bearing pipeline steel,
- high temperature plasticity,
- percentage reduction of area,
- dynamic recrystallization

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