Carbide cutting machine blade microscopic layout parameters include: carbide particle size dwc and its dispersion state; carbide cutting machine blade adjacent degree C; bonding phase of the average free range dco, zero volume phase ratio V, etc. : Microstructure of two-phase WC-based cemented carbide Available R phase volume fraction Vc. and average free range dco, WC phase average grain size dwc and intergranular adjacency C These four fundamental layout parameters are arbitrariness 3 The parameters are adequately characterized.
Slitter blade grain size
Carbide-phase slitter blade grain size is one of the most important characteristics of the cemented carbide slitter blade: In the carbide cutting blade, in addition to strictly control the carbon content, but also must control the carbide Grain size: WC grain size measurement is often stopped by the AA Glagow node method, that is, micrometer ruler (1:100) or grid micrometer is embedded in the eyepiece, and measured at 1,350 times. The maximum size of the WC grains on the ruler or grid node, followed by stopping the determination of the same in the randomly selected field of view, and so on. The size of the 100 grains is measured on weekdays, and then the grouping is based on the grains. Dimensions, calculate the volume fraction of the grain size of the group, that is to obtain the grain size of WC. To deal with coarse-grained alloys, to measure the size of more grains. This type of measurement method is too time-consuming, in the production of often By adopting the comparison method, the most affluent feature on the grinding plate is compared with various scale images of known grain sizes. In recent years, image analyzers have been used to indirectly obtain carbide grain size, dispersion, and cobalt phase. Thickness and other results:
Because the coercive force is closely related to the cobalt content and microstructure of the alloy, the coercive force can be used to balance the size of the WC average grain size under certain conditions. Fang and Eason proposed that the WC grain size and coercivity The Department of.
From the original carbide powder particle size to the ultimate sintering process, each step affects the grain size of the sintered product. The effect of the original powder particle size (mainly the particle size of the slitter blade and the particle size after the ball milling) on the grain growth during sintering The discipline is that the finer the original powder particle size, the easier it grows when it is sintered: a more meaningful discussion is the effect of particle size distribution on grain growth: the average particle size of the average particle size of 3um or 3um or more for the pressed compact Temperature is not sensitive, change within a wide range of sintering temperature, the change of particle size or mechanical properties of the sintered product is very small: when the original powder particle size is widely dispersed, there is a large number of fine particles of WC, when the sintering is very long Larger number of grains: Therefore, to obtain an average WC grain size alloy, it is necessary to apply the average grain size distribution average powder and the appropriate process track: