72A盘条钢中的夹杂物以及索氏体化率对力学性能影响  

Effect of Inclusion and Sorbitizing Rate on Mechanical Properties of 72A Wire Rod Steel

作　　者：梁宇[1,2] 王攀智[1] 梁益龙[1,2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省材料结构与强度重点实验室,贵州贵阳550025

出　　处：《热加工工艺》2013年第16期22-24,共3页Hot Working Technology

基　　金：贵州省科技厅重大专项;黔科合重大专项((2010)6007号)

摘　　要：通过金相观察统计以及夹杂物电解与能谱分析,对不同批号72A盘条产品索氏体化率以及夹杂物类型与尺寸进行研究。结果表明,72A盘条中的夹杂物主要为尺寸小于20μm的氧化物夹杂,较大颗粒的夹杂物对盘条抗拉强度无显著影响;大颗粒夹杂物含量百分比较高的盘条断面收缩率较低;而盘条索氏体化率低是影响其抗拉强度的原因。Sorbitizing rate and inclusions type and size in the 72A wire rod steels was studied according to the microstructure observation and inclusions analysis in the present work. The results show that the main inclusions in the 72A wire rod steels are oxide inclusions with the size less than 20 ixm. The tensile strength is not distinctly influenced by larger inclusions in 72A steels. The high ratio of big inclusions in 72A steels can cause the decrease of the reduction of area. The major reason for the lower tensile strength of the wire rod steels is the lower sorbitizing rate.

关 键 词：盘条钢 夹杂物 索氏体化 力学性能 

分 类 号：TG115.21[金属学及工艺—物理冶金]