Thermal fatigue properties of H13 and Dievar steels for hot-work die

doi:10.13251/j.issn.0254-6051.2022.03.032

Abstract

Abstract: Effect of tempering temperature on thermal fatigue properties of the H13 and Dievar hot-work die steels was investigated. The Uddeholm self-constrained thermal fatigue test was conducted on the specimens tempered at 520, 580 and 640 ℃, and the thermal fatigue damage factors were obtained to quantify the fatigue damage of the steels. The results show that the Dievar steel has a lower hardness but higher impact property than that of the H13 steel tempered at the same temperature, and possesses better thermal fatigue resistance. Tempered at 580 ℃, the carbide sizes of the H13 steel and Dievar steel are about 10.1 μm and 6.3 μm, respectively. The high carbide content and large size of the H13 steel result in the decrease of toughness and thermal fatigue resistance.

Key words: hot-work die steel, H13 steel, Dievar steel, quenching and tempering, carbide, thermal fatigue

CLC Number:

TG111

Wu Fangjun, Deng Xiaoyun, Jie Xiaohua, Zheng Kaihong, Luo Zhichao. Thermal fatigue properties of H13 and Dievar steels for hot-work die[J]. Heat Treatment of Metals, 2022, 47(3): 165-172.

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