Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Effects of Heat-treating Conditions on Wear Characteristics of High Speed Steel by Powder Metallurgy

분말고속도공구강의 미끄럼 마모특성에 미치는 열처리조건의 영향

  • Lee, H.Y. (Dept. of Materials Engineering, Keimyung University) ;
  • Bae, J.S. (Materials Forming Lab., KIMM) ;
  • Kim, Y.J. (Materials Forming Lab., KIMM)
  • 이한영 (계명대학교 재료공학과) ;
  • 배종수 (한국기계연구원 재료공정연구부) ;
  • 김용진 (한국기계연구원 재료공정연구부)
  • Received : 2000.11.06
  • Published : 2000.11.30
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Abstract

The effects of added elements, such as Co or Nb, on wear properties of high speed steel by powder metaliurgy(PM-HSS) had been eluminated in auther's previous paper. In addition, it is generally known that the wear properties of materials have been influenced by heat-treating conditions as well. Therefore, a study has been done to clarify the effects of heat-treating conditions on wear properties of PM-HSS. The wear tests have been performed under the same conditions as the previous paper using heat-treated PM-HSS(5%Co-1%Nb) with different quenching and tempering temperatures. The result of this paper shows that wear resistance of PM-HSS is improved with relatively high quenching temperature. However, tempering temperature is not sensitive to the wear resistance in the range of high quenching temperature. It may be deduced by the fact that the shear strength of matrix by strengthening mechanisms due to not only the quenching aging but also dispersion-hardening is improved.

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