Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Effect of Forging Condition on the Microstructure and Mechanical Properties of Centrifugal Casted 9Cr-1Mo Heat-Resisting Steel

9Cr-1Mo 내열강의 미세조직 및 기계적 성질에 미치는 원심주조 후 단조 조건의 영향

  • Received : 2009.11.02
  • Accepted : 2010.04.08
  • Published : 2010.04.30
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Abstract

The effect of forging condition on the microstructure and mechanical properties of 9Cr-1Mo heat-resisting steel was investigated. Microstructure of centrifugal casted 9Cr-1Mo heat resisting steel and forged heat resisting steel are consisted of martensite. With the increase of forging ratio, tensile strength and hardness increased, while elongation and impact value decreased. By increasing of forging starting temperature and finishing temperature, tensile strength and hardness increased, while elongation and impact value decreased. We obtained the optimum forging conditions as follow, forging ratio is 30%, forging starting temperature is $1200^{\circ}C$ and forging finishing temperature is $950^{\circ}C$.

Keywords

References

  1. 吉田豊明, 1995, "ガスタ-ビン機關の超高溫材料技術について", 耐熱金屬材料, 第123會 硏究報告, Vol. 36, No. 3, p. 275.
  2. 강창룡 외 5인, 2000, "발전플랜트용 10Cr 페라이트 내열강의 라베스상 석출거동 및 기계적 성질", 한국동력 기계공학회지, 제6권, 제1호, pp. 1-7.
  3. N. F. Vildamova et al., 1994, "Creep Behavior and structure of high chromium ferrite-martensite steels", The physics of metal's and metallography, Vol. 77, No. 6, pp. 670∼675.
  4. 김재성, 2008, "원심주조된 내열강의 미세조직 및 기계적 성질에 미치는 단조조직의 영향", 부경대학교 공학석사 학위논문.
  5. R. C. Thomson and H. K. D. H Bhadeshia, 1992, "Carbide precipitation in 12Cr 1Mo V power plant steel", metallurgical transaction A, Vol. 23A, pp. 1171-1179.
  6. S. Yoshiatsu et al., 1995, "Development of high strength 12%Cr steel pipe and tube for boilers", sumitomo kinzoku, Vol. 47, No. 4, p. 29.
  7. 강창룡 외 5인, 2009, "원심주조된 내열강의 미세조직 및 기계적 성질에 미치는 단조 조건의 영향", 한국동력기계공학회지, 제13권, 제3호, pp. 47-52.