冷却速率和保温时间对42CrMo离心铸造环坯高温性能的影响

武永红; 齐会萍; 李永堂

doi:10.15980/j.tzzz.2021.09.021

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冷却速率和保温时间对42CrMo离心铸造环坯高温性能的影响
Effects of Cooling Rate and Holding Time on High Temperature Mechanical Properties of 42CrMo Ring Blank by Centrifugal Casting
2021年41卷第9期页码：1163-1166
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.09.021

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武永红, 齐会萍, 李永堂. 冷却速率和保温时间对42CrMo离心铸造环坯高温性能的影响[J]. 特种铸造及有色合金杂志, 2021,41(9):1163-1166.

Wu Yonghong, Qi Huiping, Li Yongtang. Effects of Cooling Rate and Holding Time on High Temperature Mechanical Properties of 42CrMo Ring Blank by Centrifugal Casting[J]. Special Casting & Nonferrous Alloys, 2021,41(9):1163-1166.
武永红, 齐会萍, 李永堂. 冷却速率和保温时间对42CrMo离心铸造环坯高温性能的影响[J]. 特种铸造及有色合金杂志, 2021,41(9):1163-1166. DOI： 10.15980/j.tzzz.2021.09.021.

Wu Yonghong, Qi Huiping, Li Yongtang. Effects of Cooling Rate and Holding Time on High Temperature Mechanical Properties of 42CrMo Ring Blank by Centrifugal Casting[J]. Special Casting & Nonferrous Alloys, 2021,41(9):1163-1166. DOI： 10.15980/j.tzzz.2021.09.021.

摘要

针对环件铸辗连续成形高温出模环坯表面及边角易裂缺陷出现的原因

采用Gleeble-3500进行高温拉伸

研究高温出模立式离心铸造42CrMo环坯在不同冷却速率和保温时间下的力学性能。结果表明

冷却速率(1℃/s)和保温时间对材料强度影响较小

对塑性影响较大。在1 000℃以下缓慢冷却

塑性提高较多

在1 200℃时冷却

塑性有较大降低;快速冷却(10℃/s)则相反

1 200℃时塑性提高明显。

Abstract

In view of the causes of cracking on the surface and edges of high temperature ring blank in the mold ring blank casting-rolling continuous forming

the mechanical properties of 42 CrMo ring blank by vertical centrifugal casting were investigated at high temperature under different cooling rates and holding time by Geeble-3500 thermal test simulator. The results indicate that the cooling rate and holding time have less influence on the strength of the material

yet more on the plasticity. The plasticity of the material is increased with slowly cooling below 1 000 ℃

while decreased greatly at 1 200 ℃. Rapid cooling has the contrary law that plastic is increased significantly at 1 200 ℃.