Cold work die steel is widely used in a variety of modern manufacturing fields,and with the development of manufacturing industry,higher quality and performance requirements are constantly put forward.At present,it is found that the performance defects of cold work die steel are closely related to the types,distribution,size and morphology of carbides in steel,and improving the performance of cold work die steel should be focus on carbides.The types,distribution,size,advantages and disadvantages of common carbides in cold work die steels were summarized,and the research status of carbide control in cold work die steels at home and abroad was summarized.The effects of microalloying of elements such as rare earth,Ti,Mg and N,as well as the effects of other processes such as electromagnetic stirring,electroslag remelting,forging and heat treatment on carbides in cold work die steel and its mechanism were summarized.Finally,the development direction of carbide control in cold work die steel is prospected,which should start with microalloying and improve the production process.Some problems in the research of carbide control in cold work die steel are pointed out,such as unclear addition amount of modified elements,unsuitable addition mode of some modified elements for existing production methods and no quantitative standard of heat treatment process.
carbidecold work die steelmicroalloyingelectroslag remeltingheat treatment process
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