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분말고속도공구강의 미끄럼 마모특성에 미치는 열처리조건의 영향
이한영(H . Y . Lee),배종수(J . S . Bae),김용진(Y . J . Kim) 한국열처리공학회 2000 熱處理工學會誌 Vol.13 No.6
The effects of added elements, such as Co or Nb, on wear properties of high speed steel by powder metallurgy(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.
자기유도법에 의한 합금강의 템퍼링 온도에 따른 기계적성질과 임피던스 특성과의 관계에 관한 연구
조경식,장홍근,배종수,이주석 韓國非破壞檢査學會 1988 한국비파괴검사학회지 Vol.7 No.2
Microstructure and mechanical properties of most steels change by heat treat treatment. Such variation of sturucture and properties of steel cause an impedance change on electromagnetic induction coil. The objective of this study is, by searching the relationship between the mechanical property or microstructural changes and impedance value of induction coil, to examine the applicability of a monitoring the heat treated condition of products nondestructively.