贝氏体球铁中位错密度的测定及其影响因素  

DETERMINATION OF DISLOCATION DENSITY AND ITS INFLUENTIAL FACTORS IN BAINITE DUCTILE IRON

作　　者：魏秉庆[1] 梁吉[1] 高志栋[1] 吴德海[1] 

机构地区：[1]清华大学

出　　处：《金属学报》1996年第6期573-577,共5页Acta Metallurgica Sinica

基　　金：国家教育委员会博士点科研基金

摘　　要：采用Ｘ射线衍射法及新的线形分析理论，准确地测定了不同工艺条件下贝氏体球铁的位错密度．分析了化学成分、等温温度、回火处理及形变处理等与位错密度的关系．实验结果证明，位错密度的增加与贝氏体的晶粒细化伴生．Dislocation densities in ductile iron under different processing conditions were determined exactly by X-ray diffraction method and a new profile analysis theory. The relations of dislocation density to chemical composition,austempering temperature, tempering treatment and deformation treatment were analysed. Experimental results indicated that the increase in dislocation density was accompanied by the fining of bainite grain.

关 键 词：贝氏体 位错 密度 X射线衍射 球墨铸铁 

分 类 号：TG143.5[一般工业技术—材料科学与工程] TG115.23[金属学及工艺—金属材料]