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包含在涂层显微结构中的未熔化的粉末颗粒。未熔颖粒在形状上为原始的、未经过熔化的圆形或有棱角的颗粒形状。呈球形或部分压扁的粉末颗粒.其宽高比小于3:2。
下图为等离子喷涂WC 17Co涂层金相,显示聚集的未熔颗粒。
未熔颗粒有什么危害?怎样调整喷涂参数解决此问题?请关注“瞎说热喷涂”公众号。
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