In addition, molten metal infiltration treatment methods are also used to produce gradient cemented carbides, such as gradient cemented carbide top hammers. In recent years, the new research hotspots are fine-grained, ultra-fine-grained, and even nanocrystalline cemented carbide and graded cemented carbide. Gradient cemented carbide has composition gradients, structural gradients, etc. Judging from the development in recent years, the theory of research and design of cemented carbide molds in my country has been deeper and more scientific, and the application is more extensive. Tianjin Cemented Carbide Research Institute has also developed a hard alloy mold material equivalent to YG (15-20) with iron and nickel instead of drills, which is equivalent to YG20 in terms of rolling forging of standard parts and cold heading of steel balls. In addition, there are inlay casting and inlay cemented carbide hot work molds, which have achieved good results in rolling pipes and wire rods. For example, the fine-grained YGS wire drawing die is 3 times that of the general wire drawing die when drawing teel wire.Surface treatment mesh: since the cemented carbide was invented by German scientists in the early 1920s, it was put on the market under the name ';widia'; (like diamond), and the tungsten wire drawing die was first produced for industrial application, replacing the price at that time Expensive diamond drawing die. fine-grained and ultra-fine-grained cemented carbides are also basket mould factory on the market. Although my country's cemented carbide started late, it has developed rapidly. For example, the high strength and toughness cemented carbides equivalent to YG, YG20 and YG25 developed by Hunan Metallurgical Materials have achieved good results in cold heading dies and cold extrusion dies.. In the development of new cemented carbide materials, the use of iron and nickel instead of diamonds has become a hot topic in the past few years. At present, cemented carbide molds have basically been serialized and standardized
