A1对M2高速钢凝固过程的作用  

INFLUENCE OF Al ON THE SOLIDIFICATION PROCEDURE OF M2 HIGH SPEED STEEL

作　　者：李彦军[1] 姜启川[2] 何镇明[2] 赵宇光[2] 葛僚海 

机构地区：[1]哈尔滨工业大学 [2]吉林工业大学 [3]中国科学院长春应用化学研究所

出　　处：《材料研究学报》1997年第2期216-218,共3页Chinese Journal of Materials Research

基　　金：国家自然科学基金!59371034

摘　　要：研究了A1在M2高速钢凝固过程中的行为及其对凝固组织的影响．结果表明，A1具有扩大δ铁素体区，促进以往状树枝晶方式结晶的作用；A1在M2钢中呈负偏析分布，并参与形成M2C共晶碳化物．A1还降低共晶碳化物的分解温度，使共晶碳化物在高温加热时易于分解和粒化．An investigation has been made on the behavior of Al during the solidification of M2 high speed steel and the effect of Al on the microstructure of the steel. Al has the effect of expanding the delta-ferrite crystallizing region and make the steel crystallize in the column dendrite pattern. It was found that Al in M2 steel distributes in the pattern of negative partition. The majority of Al was dissolved in the matrix, and a small quantity of Al was detected in M2C carbide, which may decrease the decomposing temperature of the eutectic carbide and make it easy to be decomposed and granulated during high temperature heat treatyment.

关 键 词：铝 M2 高速钢 凝固过程 共晶碳化物 

分 类 号：TG142.45[一般工业技术—材料科学与工程] TG111.4[金属学及工艺—金属材料]