Austenite grain growth behavior of 500 MPa grade gantry steel

doi:10.13251/j.issn.0254-6051.2020.01.028

Abstract

Abstract: In order to study the effect of heating temperature and holding time on the austenite grain size of 500 MPa grade gantry steel, two kinds of tested steels with different compositions were studied. The SK type tubular heating furnace was used to heat the tested steels to 1000-1200 ℃ for 15 min and 30 min respectively. The microstructure was observed after rapid cooling from high temperature and the grain size was determined. The results show that the austenite grain size increases with the increase of heating temperature and holding time, the addition of Cr has a certain inhibitory effect on the growth of austenite grains. The research results have a practical guidance for the development of actual production heating process.

Key words: gantry steel, heating temperature, holding time, Cr element, austenite grain

CLC Number:

TG156.1

Gao Cairu, Huo Xiwei, Song Yuqing, Du Linxiu, Qiao Peng, Qu Bingbing. Austenite grain growth behavior of 500 MPa grade gantry steel[J]. HTM, 2020, 45(1): 139-142.

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Austenite grain growth behavior of 500 MPa grade gantry steel

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