Simulation of heating process for martensitic heat resistant steel G115 heavy pipe blanks

doi:10.13251/j.issn.0254-6051.2022.04.036

Abstract

Abstract: In order to optimize the heating process of martensitic heat resistant steel G115 heavy ingot before punching, the effect of heating process on temperature field of ingot was analyzed by finite element method. The results show that the temperature difference between the edge of the end section and 1/2 of the length of the ingot is larger, and the maximum temperature difference is 93 ℃. The higher the ingot heating temperature, the smaller the temperature difference. The edge of the end section has the highest temperature and the fastest heating rate, and the center of section of 1/2 longth of the ingot has the lowest temperature and the slowest heating rate. The research results can recommend the heating process of G115 steel heavy ingot before billet making, which is the furnace temperature increases from 300 ℃ to 500 ℃ held for 4 h, then to 850 ℃ held for 4 h, and rises to 1000 ℃ for 4 h then increases to 1230 ℃ for 20 h, it can provide a reference for the heating process of other processes.

Key words: martensitic heat-resistant steel G115, ingot heating, temperature field, finite element analysis

CLC Number:

Zhao Xin, Chen Zhengzong, Zhao Haiping. Simulation of heating process for martensitic heat resistant steel G115 heavy pipe blanks[J]. Heat Treatment of Metals, 2022, 47(4): 208-212.

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