超细硬质合金生产过程中的质量控制

综述了超细硬质合金在生产过程中的质量控制,着重分析了中低钴(质量分数《8%)超细硬质合金在生产过程中容易出现的微孔隙、聚晶、钴池、晶粒长大和夹粗等缺陷及其可能产生的原因.大量超细硬质合金工业化生产实践表明:选用粒度分布均匀、杂质含量低的超细粉末原料,并配以相应的湿磨、压制和烧结工艺以及对生产各环节精确、量化控制和管理等是生产优质、高性能超细硬质合金的关键因素.

Quality controll of the superfine cemented carbide in production run

Quality controll of the low cobalt content(cobalt content less than 8wt%) superfine cemented carbide in production,defects such as micro-bore,aggregation,cobalt lake,grain growth,or intermingled coarse grain,etc,and their possible causation are summarized.Mass praduction of superfine cemented carbide shows that choosing uniform and low impurity superfine raw material powder,milling pressing,and sintering process,and precision controll in production run,are the key factors for producing high quality and superfine cemented carbide.