Drawing die material-advantages-disadvantages-scope of application 

　　 Alloy steel mold-easy to make-poor wear resistance, short life-basically eliminated 

　　Natural diamond-high hardness, good wear resistance-brittleness, difficult to process-wire die with diameter below 1.2mm 

　　Cemented carbide-good polishing performance, low energy consumption-poor wear resistance, difficult to process-various diameter wires 

　　 Polycrystalline synthetic diamond-high hardness, good wear resistance-difficult to process, high cost-small wire, wire 

　　CVD coating material-high smoothness, good temperature resistance-complex process, difficult to process-small wire, wire 

　　Ceramic materials-wear resistance, high temperature resistance, good corrosion resistance-thermal shock, poor toughness, difficult to process-no large-scale application 

　　, and at the same time has excellent strength and hardness, the highest drawing output, and the surface quality also meets the requirements. Tests have proved that the life of the CVD coated diamond wire drawing die is equivalent to that of the natural diamond die, the product qualification rate is high, and the surface quality is better than domestic polycrystalline diamond. Therefore, for small diameter wire drawing processing, CVD coated diamond wire drawing die is a more ideal choice.  Although the wire drawing dies can be used to process a variety of metals and alloys such as steel, copper, tungsten, molybdenum, etc., the wire drawing dies of different materials have their applicable processing ranges, and the wire drawing dies of different materials have their wear patterns when processing the same wire.

There is a big difference between and service life, so a reasonable selection of the material of the wire drawing die is the key to ensure successful application. Wire drawing dies of different materials have their relatively reasonable processing objects. The rationality of drawing processing mainly refers to the matching of the mechanical, physical and chemical properties of the drawing die and the wire to obtain the longest die life. For example, when drawing a copper wire of the same diameter, the service life of the polycrystalline diamond die is 300 to 500 times that of a cemented carbide die, and it is only 80 to 100 times when drawing a nickel wire. When drawing a molybdenum wire, the service life The service life is only 50 to 80 times that of the cemented carbide die, and when drawing carbon steel, the life of the polycrystalline diamond die is only 20 to 60 times that of the cemented carbide die. Due to the lack of systematic research on the matching theory of drawing dies and wires in China, it has led to blind selection and waste of resources. The friction and wear of the drawing die is very complicated, and it is generally divided into two categories: damage and friction and wear. The damage of the drawing die can be divided into ring damage, tensile damage, shear damage and support surface damage. Friction and wear can be divided into abrasion wear, friction wear, corrosion wear, abrasion and wear caused by fine particles. The different working conditions (wire material, drawing die material, lubricant, etc.) make the wear and damage of the drawing die have its own unique process. The relationship between the wear and tear of the drawing die is essentially interrelated. The situation inside the drawing die may be very subtle, some factors may work at the same time, and their superimposed effects are very complicated and difficult to understand. It is possible that the effect of one factor will conceal the effect of other factors. The above-mentioned forms of damage and friction and wear may often be intertwined, which increases the difficulty of analyzing the damage and wear mechanism of the wire drawing die. But in general, the order of wear resistance of wire drawing dies of various materials from high to low is: diamond wire drawing die (without considering the anisotropy of natural diamond)-ceramic wire drawing die-cemented carbide die- Obsolete alloy steel molds. 

Through the research on the material of the wire drawing die, the wire drawing die is developing towards high strength, high hardness, and high wear resistance. Various new materials that meet the requirements are emerging in an endless stream. The wear resistance of the drawing die is greatly improved, and the time of wear and damage is obvious. Delay, the life of the wire drawing die continues to increase, and the processing accuracy has also been improved to a certain extent. The applicable range of drawing processing is gradually expanding. Wires of various specifications from thick to thin can be processed, and special-shaped dies for processing irregular wires have appeared.