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提出了一种新颖的W6Mo5Cr4V2高速钢斜撑块的挤压成形工艺。通过研究高速钢高温材料性能,分析斜撑块外形尺寸,参考模拟过程时金属分区流动规律,优化凹模结构及工艺参数,设计出了高速钢斜撑块热挤压成形工艺和模具,并利用大量的试模实验验证了该工艺的可行性。同时,对比分析挤压前后高速钢碳化物的晶粒度和不均匀度,研究挤压工艺对高速钢碳化物的影响;并测定多次回火后锻件的硬度变化,确定斜撑块的红硬性并未下降,符合使用要求。
A novel W6Mo5Cr4V2 high-speed steel diagonal brace extrusion molding process is proposed. Through analyzing the properties of high speed steel and high temperature materials, analyzing the external dimensions of the diagonal blocks, referring to the flow pattern of the metal partitions during the process of the simulation, optimizing the structure of the concave die and the process parameters, the hot extrusion process and mold of the high speed steel diagonal blocks were designed. A large number of test mode experiments verify the feasibility of the process. At the same time, the grain size and non-uniformity of high-speed steel before and after extrusion were comparatively analyzed to study the influence of extrusion process on high-speed steel carbides. The hardness of forging after repeated tempering was measured to determine the red hardness Did not decline, in line with the requirements.