Transactions of Materials and Heat Treatment

Title：Effect of forging temperature on high-temperature performance of new mechanical die steel

Authors： Yin Jiu1 Cheng Xingguo2

Unit：（1.Department of Mechanical and Electrical Engineering Hubei Light Industry Technology Institute Wuhan 430070 China 2.College of Mechnaical and Electronic Engineering Guizhou Minzu University Guiyang 550025 China)

KeyWords： initial forging temperature final forging temperature 4Cr5MoSiV1NbSr die steel high-temperature wear resistance high-temperature oxidation resistance

ClassificationCode：TH164

year,vol(issue):pagenumber：2025,50(4):1-6

Abstract：

Abstract:

As a new type of die steel， 4Cr5MoSiV1NbSr has excellent application prospects. In order to investigate the influence of forging temperature on the high-temperature properties of 4Cr5MoSiV1NbSr die steel， selecting the initial forging temperature of 1000-1250 ℃ and the final forging temperature of 700-950 ℃， wear and oxidation tests were conducted on the die steel after forging at 500 ℃. The results show that when the initial forging temperature increases from 1000 ℃ to 1250 ℃， the high-temperature wear resistance and the high-temperature oxidation resistance of 4Cr5MoSiV1NbSr die steel sample both increase first and then decrease. When the final forging temperature increases from 700 ℃ to 950 ℃， the high-temperature wear resistance and the high-temperature oxidation resistance of 4Cr5MoSiV1NbSr die steel sample both increase first and then remain basically unchanged. Compared with the initial forging at 1000 ℃， the high-temperature wear volume of Cr5MoSiV1NbSr die steel sample forged at 1150 ℃ decreases by 63.7%， and the high-temperature oxidation unit area mass gain decreases by 57.3%. Compared with the final forging at 700 ℃， the high-temperature wear volume of Cr5MoSiV1NbSr die steel sample forged at 900 ℃ decreases by 74.5%， and the high-temperature oxidation unit area mass gain decreases by 66.7%.

Funds：

基金项目:湖北省教育厅科研项目(B2019421)

作者简介：尹久（1973-），女，本科，副教授

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