回火温度对1Cr13不锈钢组织与力学性能的影响
Effects of Tempering Temperature on Microstructure and Mechanical Properties of 1Cr13 Stainless Steel
杨顺贞
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作者单位：河海大学机电工程学院
中文关键字：1Cr13；回火温度；显微组织；力学性能
英文关键字：1Cr13; tempering temperature; microstructure; mechanical property
中文摘要：采用不同回火温度对1050℃油冷淬火后的1Cr13不锈钢进行回火处理，然后对试样进行了力学性能检测和显微组织分析。结果表明：随着回火温度的升高马氏体组织不断分解，当温度高于450℃时，合金碳化物开始沿晶界析出，当温度达到600℃以上时，马氏体组织转变为索氏体组织，合金碳化物已呈现弥散分布，并开始长大、球化；显微组织的变化导致其力学性能也出现较大变化，随着回火温度的升高，其硬度和抗拉强度降低，但其冲击韧性显著提高；1050℃油冷淬火650~750℃空冷回火时可以获得良好的综合力学性能。
英文摘要：1050℃ oil quenching 1Cr13 stainless steel was tempered under different tempering temperature, then tested the mechanical properties and analyzed the microstructure . The results showed that, martensite would decompose constantly with the increase of tempering temperature, when the temperature is higher than 450℃, alloy carbides started to separate out along the grain boundaries; when higher than 600℃, martensite decomposed and transformed to sorbite, alloy carbides was dispersed and began to grow up with spheroidizing. Change in the microstructure resulted in the big change of mechanical properties, with the increase of tempering temperature, hardness and tensile strength reduced, and impact toughness improved significantly. Especially the 1050℃ oil quenching and 650~750℃ air cold tempering can get good comprehensive mechanical performance.