Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지

The Effect of Thermomechanical Treatment on the High Temperature Properties in Fe-Ni-C Alloy

Fe-Ni-C합금의 고온물성에 미치는 가공열처리의 영향

  • Ahn, H.K. (Faculty of New Materials Engineering & Research Institute of Advanced Materials Development, Chonbuk National University) ;
  • Lee, K.B. (Faculty of New Materials Engineering & Research Institute of Advanced Materials Development, Chonbuk National University) ;
  • Kim, H.S. (Faculty of New Materials Engineering & Research Institute of Advanced Materials Development, Chonbuk National University)
  • 안행근 (전북대학교 공과대학 신소재공학부, 신소재개발연구소) ;
  • 이규복 (전북대학교 공과대학 신소재공학부, 신소재개발연구소) ;
  • 김학신 (전북대학교 공과대학 신소재공학부, 신소재개발연구소)
  • Published : 1998.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of thermomechanical treatment on thermal expantion and melting point of Fe-30%Ni-0.35%C alloy was investigated. The dimention changes of the ausformed martensite and the marformed martensite were decreased with increasing deformation degree in the range of $25{\sim}350^{\circ}C$ prior to reverse transformation but became larger in the range of $500{\sim}800^{\circ}C$ after the reverse transformation. The dimension change and the thermal expansion coefficient were reduced in the order of the deformed austenite, the marformed martensite and the ausformed martensite in the range of $25{\sim}800^{\circ}C$. Therefore, the ausforming treatment is more effective than the marforming treatment in improving the heat-resistance. The melting points of the deformed austenite, the ausformed martensite and the marformed martensite were lowered as either the heating rate or the degree of deformation was increased.

Keywords