Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)

Korean Tribology Society (한국트라이볼로지학회)
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The Effect of Niobium on Wear and Friction Characteristics of High Speed Steel by Powder Metallurgy

분말고속도공구강의 마찰마모특성에 미치는 Nb의 영향

  • 이한영 (계명대학교 재료공학과) ;
  • 백금주 (계명대학교 재료공학과) ;
  • 김용진 (한국기계연구원 재료공정연구부) ;
  • 배종수 (한국기계연구원 재료공정연구부) ;
  • 홍성현 (한국기계연구원 재료공정연구부)
  • Published : 1999.06.01
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Abstract

In order to evaluate the effect of Nb on wear properties of high speed steel by powder metallurgy(PM-HSS), niobium-alloyed PM-HSS have been prepared by adding 0%, 1%, 3% and 5%Nb to PM-HSS of 6%W-5%Mo-4%Cr-5%V-5%Co presented in the previous paper. Sliding wear test have been conducted in various sliding speed conditions under the constant pressure using a pin-on-disc type machine. The results of this study shows that the wear resistance of PM-HSS has been increased by the addition of Nb in the range of experimental sliding speed. However, the amount of Nb shows to be unimportant parameter for the improvement of the wear resistance. It may be due to the thermal stability of carbide and high temperature properties of matrix by adding Nb comparing to the case of no addition.

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