Transactions of Materials and Heat Treatment

Title：Experimental research on high temperature pin-disc wear for hot work die steel

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ClassificationCode：TG376

year,vol(issue):pagenumber：2022,47(1):172-179

Abstract：

In order to study the high temperature hardness of three commonly used hot work die steels and the change laws of wear rate and friction coefficient at 100 and 300 ℃, the laws for the hardness, friction coefficient and wear rate changing with temperature for three types of hot work die steels were obtained by high temperature hardness test and high temperature friction-wear test. The results show that the hardness gradually decreases with the increasing of temperature. Although the surface nitriding treatment greatly increases the hardness of the material, the hardness decreases more obviously with the increasing of temperature after nitriding treatment. At 300 ℃, the resistance to deformation of the pin-disk contact surface is reduced, and the friction coefficient between material and plate is less than that at 100 ℃. At the same time, the pin surface produces a thicker oxide layer at 300 ℃, and the wear rate is less than that at 100 ℃. The surface nitriding treatment of the material improves the wear resistance of the material at 100 ℃, but at 300 ℃, the wear amount increases instead. Thus, the test results provide reliable basic data support for the selection of mold materials and the improvement of mold wear resistance.

Funds：

高品质热作模具钢研发与产业化（2020B010184002）

作者简介：张赛军（1978-），男，博士，副教授 E-mail：mesjzhang@scut.edu.cn

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