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讨论了钨氧化物还原过程中影响钨粉粒度的各种因素以及碳化和烧结过程中抑制晶粒长大时可采用的抑制剂。还介绍了超细硬质合金系列共四个牌号,其主要成份及性能为:含钴量分别在6～13%之间、硬度分别在HRA91～93之间、抗弯强度分别在160～230公斤力/毫米~2之间、平均拉度0.5微米左右。最后列举了超蛔硬质合金系列在多刃精密刀具方面,以及在加工淬硬钢、镍基高温材料,喷涂自熔合金等难加工材料方面所取得的实用成效。
Various factors influencing the grain size of tungsten powders during tungsten reduction and the inhibitors that can be used to suppress grain growth during carbonization and sintering are discussed. Also introduced the series of ultrafine cemented carbide a total of four brands, the main components and properties are: cobalt content of 6 to 13%, respectively, the hardness of HRA91 to 93, the flexural strength of 160 to 230 Kg / mm ~ 2 between the average pull 0.5 microns or so. Finally, it lists the practical results of the super-round tungsten carbide series in the multi-blade precision knives, as well as in the processing of hardened steel, nickel-based high-temperature materials, spraying refractory materials such as self-fluxing.