소성∙가공 (Transactions of Materials Processing)

  • 제20권4호
  • /
  • Pages.296-302
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  • 2011
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  • 1225-696X(pISSN)
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  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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18Cr-10Mn-0.44N2 고질소강의 열연공정개발에 관한 연구

A Study on the Development of Hot Rolling Process for 18Cr-10Mn-0.44N2

  • 김영득 (두산중공업 기술연구원 소재기술개발팀) ;
  • 조종래 (한국해양대학교) ;
  • 이종욱 (두산중공업 기술연구원 소재기술개발팀) ;
  • 배원병 (부산대학교 정밀기계공학과)
  • 투고 : 2011.03.02
  • 심사 : 2011.06.21
  • 발행 : 2011.07.01
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초록

The objective of this paper is to determine the effect of process parameters on the behavior of a 18Cr-10Mn-$0.44N_2$ nitrogen steel sample deformed by hot rolling. Compression tests were carried out at high temperatures to determine the flow stresses needed for a finite element(FE) analysis. The strain rate, ranging from 0.1 to $1.0s^{-1}$, significantly affected the flow stress at temperatures higher than $1,000^{\circ}C$. Non-isothermal rolling simulations and laboratory rolling tests were performed with plate specimens 14.5mm thick, 135mm wide and 226mm long. A rolling reduction of 15% per pass leading to a cumulative rolling reduction of 60% was determined as optimal. The extension ratio of 176.5% in the length direction was about 30.4 times greater than the extension ratio of 5.8% in the width direction. Isotropic properties for tensile strength, microstructure and grain size were measured after mock-up hot rolling tests. The results from the mockup tests were found to be in good agreement with those of the simulations.

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참고문헌

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