摘要
采用不同温度对1050℃油冷淬火后的1Cr13不锈钢进行回火处理,然后对试样进行力学性能检测和显微组织分析。结果表明:随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,随回火温度的升高,其硬度和抗拉强度降低,但其冲击韧度显著提高;1050℃油淬+(650～750)℃空冷回火时可以获得良好的综合力学性能。
1050 ℃ oil quenching 1Cr13 stainless steel was tempered at different tempering temperature, then the mechanical properties were tested and the microstructure was analyzed. The results show that the martensite decomposes constantly with the increase of tempering temperature, when the temperature is higher than 450 ℃, alloy carbides starts to separate out along the grain boundaries; when the temperature is higher than 600 ℃, martensite decomposes and transforms to sorbite, alloy carbides is dispersed and begin to grow up with spheroidizing. Change in the microstructure results in the big change of mechanical properties, with the increase of tempering temperature, hardness and tensile strength reduces, and impact toughness improves significantly. Especially the 1050 ℃ oil quenching and 650-750 ℃ air cold tempering can get good comprehensive mechanical performance.
出处
《热加工工艺》
CSCD
北大核心
2012年第12期181-183,186,共4页
Hot Working Technology
关键词
1Cr13
回火温度
显微组织
力学性能
1Cr13
tempering temperature
micro structure
mechanical property
