학술논문
극초고강도 이차경화형 마르텐사이트강의 기계적성질에 미치는 오스포밍 공정의 영향
The Effect of Ausforming Process on Mechanical Properties of Ultrahigh Strength Secondary Hardening Martensitic Steels
The Effect of Ausforming Process on Mechanical Properties of Ultrahigh Strength Secondary Hardening Martensitic Steels
Document Type
Article
Source
열처리공학회지 / Journal of the Korean Society for Heat Treatment. Jul 31, 2021 34(4):179
Subject
Language
Korean
ISSN
1225-1070
Abstract
Two types of secondary hardening martensitic steels, 10Co-14Ni and 6Co-5Ni, were produced by vacuum induction melting to investigate the effect of ausforming process on mechanical properties. According to the results of present study, the alloy samples ausformed at low temperature indicated a rather low hardness level in overall aging time despite the refinement of martensite lath width. As the result can closely be related with the presence of primary carbides precipitated within the initial austenite matrix, we confirmed that, in ultrahigh strength secondary hardening martensitic alloy steels, the ausforming process can rather limit the degree of secondary hardening during the subsequent aging treatment. (Received July 8, 2021; Revised July 15, 2021; Accepted July 21, 2021)