图相分析法在径向精锻工艺中的应用  

The Applicatiom of Picture Analysis Method in Radial Forging Process

作　　者：康永林[1] 董德元[1] 

机构地区：[1]北京科技大学压力加工系

出　　处：《北京科技大学学报》1989年第1期38-43,共6页Journal of University of Science and Technology Beijing

摘　　要：用图相分析方法测定并分析了由精锻机锻造高速钢的碳化物分布状态。采用图相分析方法可以减少由碳化物评级图来评定高速钢质量的人为偏差。测定了碳化物颗粒形状及分布的1种分析量:(1)面积百分数,(2)平均颗粒面积,(3)平均自由程,(4)长宽比。根据这些分析测定:讨论了径向精锻工艺中累积变形程度和终锻温度的影响。增加累积变形程度并适当降低终锻温度(一般为860～910℃)有利于碳化物破碎及钢材质量的提高。Picture analysis method is used to measure and analyze the carbide distribution in the high-speed steel shaped by radial forging machine. The method can remarkablly reduce the error caused by using the comparing pictures of carbide degree to appraise the quality of high-speed steel. Following four factors are measured: (1) area percentage; (2) average area of grain; (3) average free distance; (4) length-width ratio. Based on these factors, the process of radial forging is discussed and the relationships between the factors and accumulated deformation degree, or the final deformation temperature, are oblained. The increase of the accumulated deformation degree and a reasonable amount decrease of the final deformation temperature (860-910℃) are favourable for the fineness of carbide.

关 键 词：精锻工艺 图相分析 高速钢 碳化物 

分 类 号：TG316[金属学及工艺—金属压力加工]