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0.25% C 저합금강 합금원소 변동에 따른 미세조직과 가공경화능의 변화가 미끄럼 마멸거동에 미치는 영향
김종철(J. C. Kim),정영중(Y. J. Jung),김용석(Y.-S. Kim),H. W. Kwon,N. R. Yoon 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.10
The aim of this investigation is to find out the effect of microstructure and work-hardening capacity varied by alloying element on the sliding wear of 0.25 wt % C low alloy steel. To examine the effect of microstructure and work-hardening capacity, 5 kinds of steels were fabricated by changing the contents of Mn, Cr and B in the 0.25C steel. Dry sliding wear tests were carried out using a pin-on-disk wear tester at the constant load of 100 N and sliding speed of 0.1 m/s. Of all the specimens Mn, Cr and B added steels showed high wear resistance compared with the other steels. Wear resistance of the steel increased significantly when both Cr and B are added simultaneously to the steel. The high wear-resistance of the steels with B and Cr were attributed to their highter work-hardening capacity during the wear.
열처리된 2024A1 합금의 석출물이 건식 미끄럼 마멸 특성에 미치는 영향
권혁우(H.W. Gwon),윤나래(N.R. Yoon),김종철(J.C. Kim),정영중(Y.-J. Jung),김용석(Y.-S. Kim) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.5
In the present study, the effect of precipitates on the dry sliding wear characteristics of 2024 A1 alloy was investigated. Dry sliding wear tests were performed on the as-received (T4) and solution treated 2024 A1 alloy, and their wear behavior was compared in connection with work hardening behavior during the wear. Special attention was given to the relationship between strain hardening and the precipitates, which changed the wear rate and characteristics of the alloy. Work-hardening at the wearing surface is the most important factor during sliding wear of metallic materials, since the strain hardening affects the formation of a deformation layer at the surface. The deformation layer is often related with the formation of wear particles which are detached particles from the layer. The hardened deformation layer also acts as a protecting layer that resists further progress of wear. The relationship between the microstructure and the strain-hardening at the wearing surface was explored, which explained the wear-rate variation with the microstructure.