Effects of Annealing Temperature on Microstructure and Property of Aluminum-Free Ultrahigh Carbon Steel

XUE Guanlu; QU Jiamin; WANG Zhimin; LIU Qingsuo

doi:10.11973/jxgccl201710018

Materials and Mechanical Engineering > 2017 > 41(10): 82-85. > DOI: 10.11973/jxgccl201710018

XUE Guanlu, QU Jiamin, WANG Zhimin, LIU Qingsuo. Effects of Annealing Temperature on Microstructure and Property of Aluminum-Free Ultrahigh Carbon Steel[J]. Materials and Mechanical Engineering, 2017, 41(10): 82-85. DOI: 10.11973/jxgccl201710018

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Effects of Annealing Temperature on Microstructure and Property of Aluminum-Free Ultrahigh Carbon Steel

1. Jining Technician Institute, Jining 272000, China;
2. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China

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Received Date: August 06, 2016
Revised Date: June 21, 2017

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Abstract

The annealing treatments at 800-1 100℃ were conducted on an aluminum-free ultrahigh carbon steel with nominal composition of Fe-1.58C-1.97Cr-0.26Si-0.73Mn-0.09Mo, and then the effects of the annealing temperature on the microstructure and mechanical properties of the steel were studied by the methods such as phase analysis, microstructural observation, mechanical property tests. The results show that at the annealing temperature of 800℃, a large number of net-like carbides existed in the microstructure of the tested steel. When the annealing temperature increased to 860℃, the net-like carbides disappeared and the microstructure of fine and evenly distributed cabides and pearlite was obtained. When the annealing temperature increased further to 1 100℃, the pearlite became coarse and net-like carbides precipitated again in the tested steel. With the increase of annealing temperature, the tensile strength and impact energy of the tested steel first increased then decreased and both reached the peak values at 860℃, which were 1 017 MPa and 15 J, respectively.
- aluminum-free ultrahigh carbon steel,
- annealing temperature,
- carbide,
- mechanical property

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