Effect of quenching process on microstructure and mechanical properties of H13E steel

doi:10.13251/j.issn.0254-6051.2021.10.025

Abstract

Abstract: Effects of quenching process on microstructure and mechanical properties of the H13E steel, a modified H13 by adjusting alloying elements, were studied. The results show that the austenite grain size increases monotonically with the increase of quenching temperature. The average austenite grain size increases by about 40 μm when the temperature is increased from 1020 ℃ to 1080 ℃. The maximum hardness is 61.6 HRC at 1060 ℃, which is 3 to 5 HRC higher than that of the traditional H13 steel, and the impact property value can be more than 16 J. When the holding time is 20-50 min, the austenite grain growth rate slows, the average austenite grain size increases by only about 7 μm, and the hardness decreases by only about 0.2 HRC. Under the same conditions, the martensite of H13E steel after oil cooling is finer, and the mechanical properties are better than those of the H13E steel after air cooling. Considering the comprehensive mechanical properties, the optimal quenching process for the H13E steel is holding at 1060 ℃ for 20-30 min, then oil cooling.

Key words: H13E steel, quenching, austenite grain, microstructure, mechanical properties

CLC Number:

TG142.2

Ai Yunlong, Liu Zhe, Chen Weihua, Zhu Zhentao, Luo Guihai, Liang Bingliang. Effect of quenching process on microstructure and mechanical properties of H13E steel[J]. Heat Treatment of Metals, 2021, 46(10): 144-150.

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