硫、磷晶界偏聚对40CrNi2Mo钢冲击性能的影响  

Influence of sulphur and phosphorus grain-boundary segregation on impact property for 40CrNi2Mo steel

作　　者：李晓源[1] 孙颖[2] 

机构地区：[1]钢铁研究总院,北京100081 [2]国家知识产权局专利局专利审查协作北京中心,北京100190

出　　处：《金属热处理》2013年第4期16-19,共4页Heat Treatment of Metals

摘　　要：通过不同冶炼方法得到了硫、磷含量有明显差异的40CrNi2Mo钢,研究了硫、磷在钢中的存在和偏聚行为,及其对冲击性能的影响。试验结果显示,硫、磷在晶界发生偏聚,随着钢中硫、磷含量的增加,硫、磷的晶界偏聚量升高。夹杂物对高温回火试验钢冲击吸收能量影响较大,而硫、磷的晶界偏聚是影响低温回火试验钢冲击性能的重要因素。Some 40CrNi2Mo steels with different S, P contents were produced by different metallurgy processes. The S, P grain-boundary segregation and their influence on impact property of 40CrNi2Mo steels were analyzed. The resuhs show that S and P segregate along grain boundaries and the more S and P in the steels contain, the more their segregation occurs. When the steels are tempered at high temperature, the impact property of the steels is influenced evidently by the inclusions. The more effect of the S, P grain-boundary segregation on impact property of the steels is correlated when the steels are tempered at low temperature.

关 键 词：40CRNI2MO钢 硫 磷 晶界偏聚 冲击性能 

分 类 号：TG115.21[金属学及工艺—物理冶金]