Martensite transformation and the secondary carbide precipitation are the cause of materials wear resitance increase. When there was about 15% retained austenite in the matrix, its abrasion resistance reaches the maximum.

• 当残余奥氏体含量约为15%25时,材料的耐磨性能达到最好,残余奥氏体量较多或较少都不利于耐磨性的提高。 结果表明,亚临界加深冷处理试样的磨损性能较未深冷的试样有较大的提高。