连续冷却过程中低碳贝氏体钢的晶界化学  

Grain Boundary Chemistry of Low Carbon Bainite Steel During Continuous Cooling

作　　者：张灶利[1,2] 林清英[1,2] 余宗森[1,2] 

机构地区：[1]北京科技大学材料物理系 [2]钢铁研究总院

出　　处：《金属热处理学报》1998年第2期11-15,共5页

摘　　要：用俄歇电子能谱仪分析了低碳贝氏体钢奥氏体化后炉冷、空冷、油冷和水冷时Ｃ、Ｂ、Ｐ、Ｓ等元素在晶界的偏聚行为。结果发现：在不同冷却速度下，各元素在晶界的偏聚量不同。慢冷速下，Ｂ、Ｐ晶界浓度较高，快冷速下Ｓ晶界浓度较高。Ｃ在晶界的浓度随冷速的提高增加至一定值后趋于平衡。晶界上元素Ｃ、Ｂ、Ｐ、Ｓ之间，存在化学相互作用及位置竞争现象。用扫描电镜观察了断口形貌。Auger electron spectroscopy was used to study grain boundary segregation of C,B,P and S in low carbon steel with furnace cooling, aircooling, oilcooling, watercooling after austenitizing. The results showed that the amount of segregation to grain boundary at different cooling rates was different for each element. The grain boundary concentration of B,P was high at lower cooling rate, and high for S at high rate, but unlike B,P,S, that of C increased with the increasing of cooling rate and then approached to equilibrium. Chemical interaction and site competition among C,B,P and S in the grain boundary existed, and the fractured surface were observed by SEM.

关 键 词：低碳贝氏体钢 晶界偏聚 俄歇电子能谱 连续冷却 

分 类 号：TG151.2[金属学及工艺—热处理]