Cemented carbide generally refers to tungsten steel, which is a kind of high-hardness alloy material, which is generally imported. The price is more expensive and cannot be bought in ordinary hardware stores. In shops that buy machine tools and other machining equipment, metal cutting tool materials Only available in specialty stores. Carbide welded inserts, which are relatively common metal cutting tool inserts on cutting machine tools, are generally used on turning tools and milling cutters.
Cemented carbide steel is a high-alloy tool steel with more alloying elements such as w, Mo, Cr, and V, and its carbon content is 0.7% to 1.05%. High-speed steel has high heat resistance, its cutting temperature can reach 6000 ℃, compared with carbon tool steel and alloy tool steel, its cutting speed can be doubled. High-speed steel has good toughness and formability, and can be used to manufacture almost all kinds of tools, such as taps, twist drills, gear tools, broaches, small diameter milling cutters, etc. However, high-speed steel also has defects such as poor wear resistance and poor heat resistance, and it has been difficult to meet the increasing requirements of modern cutting tool materials; some of the main elements in high-speed steel materials are tungsten;
Adding TaC, NbC and other rare metal carbides to the cemented carbide materials can combine the additives with the original hard phase WC and TiC to form a complex solid solution structure, thereby further strengthening the hard phase structure and suppressing the hard The effects of phase grain growth and enhancement of the uniformity of the structure are of great benefit to improving the overall performance of the cemented carbide.
In the ISO standard P, K, M type cemented carbide pai numbers, there are such cemented carbides with Ta(Nb)C added.
