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Estimation of Hardfacing Material and Thickness of STD61 Hot-Working Tool Steels Through Three-Dimensional Heat Transfer and Thermal Stress Analyses

3 차원 열전달/열응력 해석을 통한 STD61 열간 금형강의 하드페이싱 재료 및 두께 예측

  • Park, Na-Ra (Dept. of Mechanical Engineering, Chosun Univ.) ;
  • Ahn, Dong-Gyu (Dept. of Mechanical Engineering, Chosun Univ.)
  • Received : 2014.02.04
  • Accepted : 2014.02.19
  • Published : 2014.04.01

Abstract

The goal of this paper is to estimate proper hardfacing material and thickness of STD61 hot-working tool steel through three-dimensional heat transfer and thermal stress analyses. Stellite6, Stellite21 and 19-9DL superalloys are chosen as alternative hardfacing materials. The influence of hardfacing materials and thicknesses on temperature, thermal stress and thermal strain distributions of the hardfaced part are investigated using the results of the analyses. From the results of the investigation, it has been noted that a hardfacing material with a high conductivity and a thinner hardfaced layer are desired to create an effective hardfacing layer in terms of heat transfer characteristics. In addition, it has been revealed that the deviation of effective stress and principal strain in the vicinity of the joined region are minimized when the Stellite21 hardfaced layer with the thickness of 2 mm is created on the STD61. Based on the above results, a proper hardfacing material and thickness for STD61 tool steel have been estimated.

Keywords

Hardfacing Material;Hardfacing Thickness;Hot-working Tool Steel;Temperature Distribution;Stress-Strain Distribution

Acknowledgement

Supported by : 한국연구재단

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