Effect of rare earth Ce on CCT curves of H13 steel

doi:10.13251/j.issn.0254-6051.2022.07.034

Abstract

Abstract: Effect of rare earth element Ce on continuous cooling transformation (CCT) curves of hot work die steel H13 was studied by measuring the CCT curves of the H13 steels without Ce and with 0.026%Ce. The results show that the addition of 0.026%Ce into the H13 steel can purify molten steel, improve microstructure, refine grains and eliminate undissolved carbides. Meanwhile, the addition of 0.026%Ce causes the transformation curve of pearlite and bainite to shift to the left, advances the pearlite phase transformation and bainite transformation, enlarges the transformation area of pearlite (A+P+C) and bainite (A+B+C), and reduces the transformation area of martensite (A+M+C) correspondingly. The hardness of the H13 steel increases with the addition of Ce, and also increases with the increase of cooling rate.

Key words: H13 steel, CCT curves, rare earth element Ce, microstructure

CLC Number:

TG151.2

Xu Qihao, Yang Lilin, Xia Ming, Qin Chen, Zhao Liping. Effect of rare earth Ce on CCT curves of H13 steel[J]. Heat Treatment of Metals, 2022, 47(7): 197-202.

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