Effect of Heat Treatment on Mechanical Properties of H13 Steel
نویسندگان
چکیده
This paper reports results of in-house experimentation on heat treatment and mechanical testing of H13 tool steel. Heat treatment strategy practiced by the industry is described in detail. Effect of various types of heat treatment on fracture toughness, hardness and other mechanical properties is also analyzed. It was found that toughness (expressed in terms of plane-strain fracture toughness KIC or Charpy impact energy CVN) and hardness (HRC) of H13 steel vary in a nonlinearly manner against tempering temperature. Toughness shows a decreasing-increasing trend, while hardness exhibits an opposite increasing-decreasing pattern with increasing temper temperature. Optimum heat treatment strategy for commercial aluminum extrusion dies (H13 steel) appears to be tempering in the 525-550oC temperature range, to get the best combination of high toughness and high hardness.
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