ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Fabrication of Ultrafine Grained High Speed Steel with Satisfactory Carbide Dissolution by Electropulsing Treatment
Jiatao ZhangHongli ZhaoQiuyue ShiDonwei MaJianxin Sun
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JOURNALS OPEN ACCESS Advance online publication

Article ID: ISIJINT-2018-774

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Abstract

Microstructure of M2 high speed steel (HSS) after electropulsing treatment (EPT) was studied. The secondary carbides precipitated during pre-tempering were dissolved completely during EPT. But the secondary carbides in the starting microstructure cannot be dissolved completely upon conventional reheating to the temperature same as that during EPT. The austenite grain size was ultra-refined by EPT. This study provides a new way to refine austenite grain size in HSS without diminishing the dissolution amount of carbides.

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© 2019 by The Iron and Steel Institute of Japan
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