Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지

A Study on the High Temperature Strength of Ferritic Stainless Cast Steels

페라이트계 스테인레스 주강의 고온강도에 관한 연구

  • Ann, Soo-Jung (Dept. of Materials and Metallurgical Eng. of Ulsan University) ;
  • Kang, Mi-Ri (Dept. of Materials and Metallurgical Eng. of Ulsan University) ;
  • Seo, Do-Soo (Dept. of Materials and Metallurgical Eng. of Ulsan University) ;
  • Kim, Yong-Hyun (Dept. of Metallurgical Eng. of Yeong Dong Juni. College) ;
  • Lee, Kwang-Hak (Dept. of Materials and Metallurgical Eng. of Ulsan University) ;
  • Kim, Heung-Shik (Dept. of Materials and Metallurgical Eng. of Ulsan University)
  • 안수정 (울산대학교 재료공학 금속공학부) ;
  • 강미리 (울산대학교 재료공학 금속공학부) ;
  • 서도수 (울산대학교 재료공학 금속공학부) ;
  • 김용현 (영동전문대 금속과) ;
  • 이광학 (울산대학교 재료공학 금속공학부) ;
  • 김흥식 (울산대학교 재료공학 금속공학부)
  • Published : 1998.12.20
Download PDF
⟨ Previous Next ⟩

Abstract

A Study on microstructure and elevated temperature strength of 18Cr-2Mo ferritic stainless steel castings strengthened by alloying small amounts of titanium and carbon, has been conducted. The morphology of titanium carbides showed spherical in shape and their distribution depended on the amount of alloying elements. Maximum density ($7{\times}10^5/cm^2$) of titanium carbides has been formed in the alloy containing 2.0 wt.% titanium and 0.5 wt.% carbon as alloying elements and the size of carbide particles is in the range of 0.5 to $3.0\;{\mu}m$. High temperature tensile and fatigue strength of this alloy were the highest among the alloys tested in this research. The fracture mode of the alloys containing alloying elements less that 2.0 wt.% titanium and 0.5 wt.% carbon showed intercrystalline fracture at room temperature, while the alloys containing higher amounts of alloying elements showed transcrystalline fracture. All of the alloys showed creep or ductile rupture mode at elevated temperature.

Keywords