Transactions of Materials and Heat Treatment

Title：Forging process of punching and hole-expanding for Cr12Mo1V1 tool steel

Authors： LIU Geng-wu(Department of Mechanical and Electronic Engineering Hunan Railway Professional Technology College Zhuzhou 412001 China)

Unit：

KeyWords： tool steel grain structure forging punching and hole-expanding heat treatment after forging

ClassificationCode：TG316;TG386

year,vol(issue):pagenumber：2008,33(1):14-16

Abstract：

Cr12,Cr12MoV and Cr12Mo1V1 are important die and tool materials.The microstructure of these materials,the stress distribution of punching and hole-expanding,heating temperature and the forging characteristic were studied.The reasons causing fractures and non-reasonable internal grain size were analyzed.The issues to be prevented and noticed for forging this kind of material were pointed out and the processes of punching,hole-expanding and the heat treatment were also proposed.It is proved that the proposed method has a good result,which can be utilized in practice.The research shows that the tools should be preheated to 200~250 ℃ when punching is carried out,the forgings should be cleaned after punching and the forgings should be cooled in the furnace.

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Reference：

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