Effect of stabilization treatment on mechanical properties and dimensional stability of DC53 steel

doi:10.13251/j.issn.0254-6051.2021.09.024

Abstract

Abstract: Effects of conventional heat treatment and stabilization treatment after tempering on mechanical properties and dimensional stability of the cold work mold steel DC53 were investigated by using scanning electron microscope (SEM), X-ray diffraction(XRD), hardness, toughness and coordinate measuring machine (CMM). The results show that the microstructure of the DC53 steel consists of tempered martensite, a small amount of retained austenite and carbide before and after the stabilization treatment. After the stabilization treatment with additional tempering at 400 ℃ for 2 h, the hardness and impact absorbed energy of the tested steel are 61.5 HRC and 19.7 J, respectively, while the dimensional stability of the material is further improved. The improvement of microstructure stability after tempering, the reduction of the residual stress values in the material and the aging of retained austenite are the main reasons for the improvement of dimensional stability of the tested steel.

Key words: cold work mold steel DC53, stabilization treatment, mechanical properties, dimensional stability

CLC Number:

TG156

Qiu Huaxing, Wu Zhenghuan, Li Xiaohui, Gu Liwen, Huang Lifeng. Effect of stabilization treatment on mechanical properties and dimensional stability of DC53 steel[J]. Heat Treatment of Metals, 2021, 46(9): 138-141.

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