前言冷硬铸铁,它的宏观组织是:在铸件表面和邻近表面区域内,有一定深度的白口层,往下依次为麻口层和灰口区。因白口层中的碳基本上以渗碳体的形式存在,故白口层有较高的硬度和抗压强度及良好的高比压磨损抗力,而心部又具有一定的强度和韧性。冷硬铸铁的熔炼工艺简单。正是这些优点,才使得冷硬铸铁在冶金、建材、农机等领域得到较广泛的应用。然而,人们对易磨损件的抗磨性要求越来越高。冷硬铸铁也同样面临严重挑战。冷硬铸铁件的磨损寿命取决于白口层。一般说来,白口层的硬度越高,深度越大,铸件 Foreword Chilled cast iron, its macro organization is: in the casting surface and adjacent surface area, there is a certain depth of white stratum, down to the stoma and gray mouth area. Due to the white stratum carbon is basically in the form of cementite, so the white stratum has a higher hardness and compressive strength and good high pressure wear resistance, and the heart has a certain strength and toughness. Chilled cast iron smelting process is simple. It is these advantages that make chilled cast iron widely used in metallurgy, building materials, agricultural machinery and other fields. However, the wear resistance of wear parts is increasingly demanding. Chilled cast iron also faces serious challenges. The wear life of chilled cast iron depends on the white stratum. In general, the higher the white stratum hardness, the greater the depth of casting