Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Wear Life Prediction of CrN Coating Layer on the Press Tool for Stamping the Ultra High Strength Steel Sheet

초고강도강판 프레스성형용 금형의 CrN 코팅층 마모수명 예측

  • 이정흠 ((주)대우공업 기술연구소) ;
  • 배상범 (대구대학교 대학원 기계공학과) ;
  • 윤국태 (대구기계부품연구원 뿌리산업혁신본부) ;
  • 허재영 (대구기계부품연구원 뿌리산업혁신본부) ;
  • 김세호 ;
  • 박춘달 (대구기계부품연구원 뿌리산업혁신본부)
  • Received : 2016.12.27
  • Accepted : 2017.04.06
  • Published : 2017.06.01
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Abstract

In this study, a wear test method was proposed to predict the wear life of the CrN layer coated on the surface of the press tools for manufacturing the auto-parts with ultra high strength steel (UHSS) with a tensile strength of 1.5 GPa. The pin-on-disc type wear test was carried out to confirm the feasibility and the reproducibility of the wear amount according to the test conditions such as the normal force, the sliding velocity, and the sliding speed. The test conditions were obtained from the finite element stamping analysis and the wear simulation. With the wear amount from the wear test, a prediction model of the wear depth in the CrN coating layer was proposed according to the test conditions with the design of experiments such as Taguchi method and the response surface method. The derived prediction model was then compared to the result of the Archard wear model, fully describing that the proposed model can effectively predict the wear life of the press tools for the auto-parts with UHSS.

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References

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