【作者】 马桂旺； 王京华； 宋力宾； 戚翠芬；

【Author】 Ma GuiWang~1 Wang JingHua~1 Song LiBin~1 Qi CuiFen~2 (1.Shi Jia Zhuang Iron and Steel Co Dd,Shi Jia Zhuang 050031;2.He Bei Industry Professional Technology college,Shi Jia Zhuang 050031))

【机构】 石家庄钢铁有限责任公司； 河北工业职业技术学院；

【摘要】 楔横轧是一种轴类零件成型新工艺、新技术,与传统的切削、锻造零件成型工艺相比较,可大大提高生产效率和节约金属材料。但是楔横轧的变形主要是径向压缩、轴向延伸,对心部单元的某一方位来说其应力状态呈现周期性变化,在这种方向交变的剪应力的反复作用下,容易出现心部疏松和空洞缺陷。在使用20CrMo钢做原料进行楔横轧后,发现半成品出现了心部空洞。产生心部空洞缺陷有两个方面:一是楔横轧造成的,二是原材料本身在制造过程中产生的缺陷带到后部楔横轧工序。第一步对提供楔横轧的原材料20CrMo钢进行了检验与分析,发现了20CrMo钢原材料本身存在原始裂纹,楔横轧后轧件中的裂纹是再进一步加工时扩大造成的。更多还原

【Abstract】 cross wedge rolling is a sort of new technique in forming of parts of axle,comparing with traditional technique of cutting and forging forming parts,cross wedge rolling can greatly improve effectiveness and economize material.But distortion of cross wedge rolling mainly is compression of radial and extend of axes,stress of state at the center part unfolds periodical of transformation,on the shifting diversification shear stress,it can be find default of looseness and inanition,when using material 20CrMo in cross wedge rolling,finding inner hole default of semi-product.Engendering inner hole default fast was brought cross wedge rolling,the second was material in processed produced and then cross wedge rolling,we examined the material of 20CrMo semi-product,and analyzed to find out original crack,and then it enlarged in processing in cross wedge rolling.更多还原