Transactions of Materials and Heat Treatment

Title：Comparative research on microstructure and mechanical properties of DC53 die steel made in China and abroad

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ClassificationCode：TG142.45

year,vol(issue):pagenumber：2021,46(10):218-224

Abstract：

The microstructure and mechanical properties of DC53 cold working die steels in China and abroad were compared by experiments of chemical composition, metallography, SEM, EDS, XRD, hardness and toughness. The results show that there is no significant difference in the chemical compositions of raw materials for DC53 cold working die steels in China and abroad, imported DC53 die steel in annealed state has better cleanliness and more uniform carbide distribution than domestic DC53 die steel, and the annealed hardness of imported and domestic DC53 die steels are 240 and 255 HBS, respectively. After the same standard heat treatment (quenching+tempering), 4.56% and 3.23% retained austenite are measured in imported and domestic DC53 die steels respectively, and the hardness and toughness test results of imported and domestic DC53 die steels after heat treatment are 61.9 HRC and 11.6 J, 61.6 HRC and 7.6 J, respectively. Thus, their hardness after heat treatment is comparable, but the toughness of imported DC53 die steel is more excellent.

Funds：

重要工业原材料（模具钢材产品）质量国际比对研究

作者简介：邱华兴（1997-），男，硕士研究生 E-mail：huaxingq@126.com 通信作者：蔡玉俊（1970-），男，博士，教授 E-mail：cyjal@126.com

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