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Characteristics of Heat Treatment on Different Materials during Laser Surface Hardening of Cast Iron for Die

금형재료용 주철의 레이저 표면경화처리시 재료에 따른 열처리 특성

  • Received : 2011.07.04
  • Accepted : 2011.09.02
  • Published : 2011.12.01

Abstract

Surface hardening treatment is required to improve the wear-resistance of press die because severe abrasion of die occurs during the drawing process in which the forming of the automotive body is completed and during the trimming process in which the unnecessary parts are cut. In this study, experiments on the laser surface treatment of press die are performed. Specimens are heat-treated separately at certain plate and edge position by using a diode laser to carry out suitable surface hardening treatment to reduce the wear during the drawing and the trimming processes, and the proper conditions for heat treatment are found. Spheroidal and flake graphite cast iron specimens are used, and the heat treatment characteristics of the two materials are compared. From the results of the study, it is confirmed that the heat treatment characteristics differed depending on the materials.

Keywords

Surface Hardening Treatment;Wear Resistance;Spheroidal and Flake Graphite Cast Iron;Hardness

Acknowledgement

Supported by : 정보통신진흥원

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