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JWJ > Volume 28(3); 2010 > Article
Journal of KWJS 2010 June;28(3) :79-85.
Published online August 2, 2010.
A Study on Assessment Method of Crack Resistance and Thermal Shock Resistance in Hardfacing for Hot Forging Die
Sang-Myung Cho, Sung-Ho Kim, Yun-Ho Jung, Seung-hui Baek, Jong-Hun Jang, Chul-Gyu Park, Hee-Chul Woo, Byong-Ho Jung

Correspondence:   Published online August 2, 2010
  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.
Keywords: Hardfacing;FCW;Bending test;Thermal shock;Salt bath;Crack resistance
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