It was revealed that, when the cobalt content kept constant, the fracture toughness increased with the increase of WC particle size.
结果发现，当钴含量不变时，硬质合金的断裂韧性随w C粒度的增大而增大。
Results show that simple composition and stable properties of W oxide is a prerequisite for quality WC powder with uniform particle size and less aggregate.
结果表明：保证原料氧化钨相成分单一和性能稳定是生产粒度均匀、聚团少的优质WC粉的前提；
The scatter of WC grain fineness is referred to the fineness homogeneity of raw material W particle and the fineness of grain is influenced by the surface perfectness for thick W pattiel- es.
WC晶粒度的分散性与原始W颗粒度的均匀性有关，对于粗W粉，其颗粒完整性对WC的晶粒度有影响；
When WC content is more then 50%, spray-fusing technological property becomes worse, hardness of sprayed coating and low-stress abrasive particle wear resistance are weaken.
当w（WC）大于50%时，WC的加入使喷熔工艺性能变得极差，喷熔层的硬度和耐低应力磨粒磨损性能降低。
When WC content is more then 50%, spray-fusing technological property becomes worse, hardness of sprayed coating and low-stress abrasive particle wear resistance are weaken.
当w（WC）大于50%时，WC的加入使喷熔工艺性能变得极差，喷熔层的硬度和耐低应力磨粒磨损性能降低。
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