Transactions of Materials and Heat Treatment

Title：Influence of forging on high temperature properties for hot forging die steel

Authors： Qiao Ningning Wang Jiaqi

Unit： Shanxi Vocational University of Engineering Science and Technology Henan University of Technology

KeyWords： forging 4Cr5W2VSi hot forging die steel initial forging temperature high temperature wear resistance property high temperature oxidation resistance property

ClassificationCode：TG376.9

year,vol(issue):pagenumber：2022,47(5):19-24

Abstract：

In order to study the effect of forging on high temperature properties for 4Cr5W2VSi hot forging die steel, the forging tests of 4Cr5W2VSi hot forging die steel were carried out by different processes, and its microstructure, high temperature wear resistance property and high temperature oxidation resistance property were tested and compared with those of the unforged test steel. The results show that the forging significantly refines the microstructure of the test steel and improves the high temperature wear resistance property and high temperature oxidation resistance property of the test steel.

When the initial forging temperature increases from 1050 ℃ to 1150 ℃, the high temperature wear volume and the high temperature oxidation rate of the test steel first decrease and then increase, and the high temperature wear resistance property and high temperature oxidation resistance property first increase and then decrease.Compared with the unforged test steel, under the process parameters for the initial forging temperature of 1100 ℃, the final forging temperature of 900 ℃ and the forging ratio of 5, the improvement rate of high temperature wear volume and the high temperature oxidation rate for the test steel reach by 46% and 67%, respectively. The test steels obtain the optimal high temperature wear resistance property and high temperature oxidation resistance properties.

Funds：

山西省科技厅课题（2013041007-03）

作者简介：乔宁宁（1981-），女，硕士，讲师，E-mail：qiaoning1981@126.com

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