Nitrogen Permeation Treatment of Duplex and Austenitic Stainless Steels

Yoo, D.K.; Joo, D.W.; Kim, Insoo; Kang, C.Y.; Sung, J.H.

추천

검색

자료유형: 학술저널

저자정보: Yoo, D.K. (Department of Metallurgical Engineering, Dong-A University) Joo, D.W. (Department of Metallurgical Engineering, Dong-A University) Kim, Insoo (Department of Metallurgical Engineering, Dong-A University) Kang, C.Y. (Division of Materials Science and Engineering, Pukung National University) Sung, J.H. (Department of Metallurgical Engineering, Dong-A University)

저널정보: 한국열처리공학회 열처리공학회지 열처리공학회지 제15권 제2호

발행연도: 2002.1

수록면: 57 - 64 (8page)

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

The 22%Cr-5%Ni-3%Mo duplex and 18%Cr-8%Ni austenitic stainless steels have been nitrogen permeated under the $1Kg/cm^2$ nitrogen gas atmosphere at the temperature range of $1050^{\circ}C{\sim}1150^{\circ}C$. The nitrogen-permeated duplex and austenitic stainless steels showed the gradual decrease in hardness with increasing depth below surface. The duplex stainless steel showed nitrogen pearlite at the outmost surface and austenite single phase in the center after nitrogen permeation treatment, while the obvious microstructural change was not observed for the nitrogen-permeated austenitic stainless steel. After solution annealing the nitrogen-permeated stainless steels(NPSA treatment) at $1200^{\circ}C$ for 10 hours, the hardness of the duplex and austenitic stainless steels was constant through the 2 mm thickness of the specimen, and the ${\alpha}+{\gamma}$ phase of duplex stainless steel changed to austenite single phase. Tensile strengths and elongations of the NPSA-treated duplex stainless steel remarkably increased compared to those of solution annealed (SA) duplex stainless steel due to the solution strengthening effect of nitrogen and the phase change from a mixture of ferrite and austenite to austenite single phase, while the NP-treated austenitic stainless steel displayed the lowest value in elongation due to inhomogeneous deformation by the hardness difference between surface and interior.

#Nitrogen Permeation Treatment #Solution Nitriding #Duplex Stainless Steel #Austenitic Stainless Steel #Nitrogen Pearlite #Phase Change #Tensile Property #Hardness

참고문헌 (0)

참고문헌 신청

참고문헌이 DBpia에서 서비스 중이라면, [참고문헌 신청]을 통해 등록해보세요

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!