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Quality Manager (Retired), Steel Test & Research Center, MATIL Material Testing & Innovation Laboratories Co. , Istanbul , Turkey
For die industry where future products have decisive roles for material selection, subject of steel is an area of interest with high potential for innovation. With new production technologies that prioritize knowledge, the quality of materials has improved significantly and these developments continue. Material selection in die design is an important part of engineering to produce sustainable solutions to problems. Die manufacturing is open to innovation as of the main input is steel. Cold work tool steels are frequently preferred in die industry. Recently, in addition to traditional CWTS, new generation CWTS have been put into use. This article examines the use of one traditional and two new generation CWTS as punch tool in press of sheet metal and thread rolling dies for screw manufacure. It has been observed that the new generation CWTS offer longer lifespan compared to traditional one. The microstructures were investigated and fine and evenly distributed and multiple carbide structures they could form were evaluated using FactSage® thermodynamic software. The carbides in new generation CWTS were also rich in Mo and Nb. With help of new generation materials, modern heat treatments and advanced coating technologies, it is possible to design unique special products suitable for each work. For innovation approach of modern tool steels in the context of cold forming dies, traditional and new generation Cold Work Tool Steels (CWTS) were compared in terms of chemical composition and the use of refractory metals as alloying elements, and their performances were evaluated and interpreted.
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