A Study on Assessment Method of Crack Resistance and Thermal Shock Resistance in Hardfacing for Hot Forging Die

열간단조 금형 육성용접부 내균열성 및 내열충격성 평가방법에 관한 연구

  • Received : 2009.12.24
  • Accepted : 2010.04.02
  • Published : 2010.06.30


Hardfacing is one of the frequently applying method to increase surface hardness in hot forging die. Recently, hardfacing receives great attention due to it's repair availability and low cost. In hot forging die, crack resistance and thermal shock resistance have been considered as major properties, However there are few studies for the assessment of these properties. So, it is necessary to establish the assessment method for crack resistance and thermal shock resistance in hardfacing for hot forging die. In this study, flux cored arc welding was applied to make hardfacing welds. Three point bending test was carried out to assess hardfacing weld's crack resistance, and high temperature bending test using salt bath was developed for thermal shock resistance. Consequently, it was possible to assess crack resistance and thermal shock resistance of hardfacing welds for hot forging die quantitatively.


  1. E. R. Baek, J. Y. Jung, S. H. Ahn : Trend of the weld surfacing technology, Journal of KWS, 15-5 (1997), 385-394 (in Korean)
  2. J. H. Song, J. K. Lim, H. Takahashi : Thermal shock/fatigue evaluation of FGM by AE Technique, KSME Journal Vol. J.N DUPONT , 435-442, 1996
  3. Jiang Xu, Zhengyang Li, Wenhui Zhu, Zili Liu, Wenjin Liu : The comparative study of thermal fatigue behavior of laser deep penetration spot cladding coating and brush plating Ni-W-Co coating, Applied Surface Science, 253 (2006), 2618-2624
  4. Jam-Kyu Kim, Seong-Dae Choi, Jong-Hyung Lee, Seon-Hwan Cheong, Hyun-Kyu Kweon : Characteristics of fatigue Crack behavior for overlay welding material, The Korean Society of Manufacturing Process Engineers 2005 Autumn Conference, 131-136 (in Korean)
  5. J. W. Kim, J. H. Ryu, H. H. Park and Y. H. Moon : Analysis of Thermal Shock and Thermal Fatigue in Tool Steels for Hot Forging, Transactions of Materials Processing, 11-1, 2002 (in Korean)
  6. Y. H. Moon, J. W. Kim, C. J. Van Tyne : Thermal shock resistance of electroslag cast steel for hot-working tools, Journal of Materials Processing Technology 155-156 (2004), 2122-2126
  7. 吳 世 鎭, 硬質크롬 鍍金에서 硬度와 耐磨耗性과의 關係, 金屬表面處理 第5卷 第2號, 技術報告 (in Japanese)
  8. 대한용접.접합학회 : 용접.접합 편람, 2007, 27-29 (in Korean)
  9. Choung-Rae Lee, Sang-Ho Um, Cheol-Choi, and Chang-Hee Lee : A Study on Hot Ductility behavior of Ni-based Superalloys, Journal of KWS, 22-2 (2004), 157-166 (in Korean)
  10. M. Collin, D. Rowcliffe : Analysis and Prediction of Thermal Shock in Brittle Materials, Acta mater. 48 (2000), 1655-1665