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一、前言 亚温淬火利用韧性相铁素体的存在而获得复合细化组织从而发挥其强韧性的威力。对结构钢进行高温亚温淬火(加热温度接近于Ac_3)可以获得在马氏体基体上保留少量弥散分布的细小铁素体组织,从而具有以下几方面优点:1.提高钢在室温和低温下的冲击韧性,因而扩大材料的使用范围;2.降低钢的冷脆转折温度,与常规淬火相比,使材料可在更低的温度下处于韧性状态,3.抑制钢的可逆回火脆性,因而可降低调质
First, the foreword Alvarion quenching the use of toughness of the presence of ferrite complex to refine the organization to play its strength and toughness. The microstructure of high-temperature sub-temperature quenching (heating temperature close to Ac_3) can be obtained in the martensite matrix retained a small amount of finely dispersed ferrite distribution, which has the following advantages: 1. Improve the steel at room temperature and low temperature Of the impact toughness, thereby expanding the scope of the use of materials; 2. Reduce the temperature of the cold and brittle transition temperature, compared with conventional quenching, the material can be at a lower temperature in a ductile state, 3. Inhibit the reversible temper brittleness of steel, Thus reducing the quenching and tempering