The quality standards and influencing factors of WC roller are: material porosity, WC grain size, total carbon and free carbon content, density, hardness, magnetic saturation strength, coercive force, bending strength, impurity content, etc. In addition, there are the machining accuracy and surface roughness of the roll. Each index reflects the quality of the roller and indicates its performance. The influencing factors of roller quality are: dispersion, particle size and particle size distribution of WC powder and Co powder in mixture, the content of total carbon, free carbon, oxygen and iron, etc; The type and quantity of binder, the temperature and time of degumming, the temperature, time and atmosphere of sintering, etc. In addition, the precision of the grinding machine and the quality of the diamond grinding wheel affect the quality of roll.
Tungsten carbide roller has been used in various fields of metal plastic processing. From non-ferrous metals to steel, from hot-rolled wire rod, pipe to cold-rolled foil, rebar and so on, tungsten carbide roller is used. China has been able to produce from φ 8～ φ There are dozens of varieties and specifications of 300 mm tungsten carbide rolls. However, with the high speed of wire rods finishing rolling (up to 130m / s), people are exploring ways to improve the hardness and strength of WC roller. This is mainly due to the addition of a small amount of TAC, NBC, Ni, Cr, Mo and other elements into the WC roll; By means of hot isostatic pressing, vacuum sintering low pressure hot isostatic pressing, heat treatment and so on, the roller with better quality can be made.