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냉간압연한 고 Mn 오스테나이트계 스테인리스강의 기계적성질에 미치는 서브제로처리의 영향
황태현 ( T H Hwang ),정목환 ( M H Jung ),이종영 ( J Y Lee ),이향백 ( H B Lee ),강창룡 ( C Y Kang ) 한국열처리공학회 2012 熱處理工學會誌 Vol.25 No.5
The effect of subzero treatment on the mechanical properties of cold rolled high manganese austenitic stainless steel was investagated. α`-martensite was formed by cold rolling, and it was formed with surface relief and specific direction or crossing each other. The volume fraction of martensite increased by subzero treatment, and it was increased with longer time of subzero treatment and higher temperature of subzero treatment. The hardness and strength increased by subzero treatment, while the elongation decreased. With the increase of volume fraction of martensite, the hardness and strength was increased steeply with proportional relationship, elongation was decreased slowly. The results show that the hardness and strength was strongly controlled by the volume fraction of martensite, and the elongation was affected by transformation behavior of deformation induced martensite in the initial stage of deformation.
역변태 오스테나이트와 가공유기 마르텐사이트의 2상 혼합조직을 갖는 스테인리스강의 기계적 성질과 감쇠능
남궁원(Won Namgung),정목환(Mok-hwan Jung),이향백(Hyang-beak Lee),김재남(Jae-nam Kim),강창룡(Chang-young Kang) 한국동력기계공학회 2013 동력시스템공학회지 Vol.17 No.2
This study was carried out to investigate the relationship between mechanical properties and damping capacity in high manganese austenitic stainless steel with two phase mixed structure of reversed austenite and deformation induced martensite. Reversed austenite of ultra-fine grain size less than 0.3㎛ was obtained by reversion treatment. Two phase structure of deformation induced martensite and reversed austenite was obtained by annealing treatment at range of 500℃∼700℃ for various time in cold rolled high manganese austenite stainless steel. In stainless steel with two phase mixed structure of martensite and austenite, damping capacity decreased rapidly with the increasing hardness and strength. With the increasing elongation, damping capacity was increased rapidly and then, slowly increased.