EFFECT OF EPSILON CARBIDES ON MECHANICAL PROPERTIES AND WEAR RESISTANCE OF LOW ALLOY ABRASION RESISTANCE STEEL

摘要

In this paper, different morphology and size of nano epsilon carbides (ε-carbides) were obtained by low temperature tempering for a low alloy abrasion resistance steel, the variation of mechanical properties and three-body impact wear resistance as the variation of carbides were investigated. The results shown that as the formation of needle like type ε-carbides, the yield strength, low temperature impact toughness and three-body impact wear resistance were all increased. While when the ε-carbides grow up to the bigger rodlike type, the hardness and toughness decreased sharply, as well as the three body impact abrasion wear resistance. The wear mechanisms of the steel obtained different carbides were also analyzed.