CAJ | 학술논문

以XLWC25型WC粉末为原料，采用滚动湿磨和搅拌湿磨工艺经过不同的湿磨时间制备5组WC-6Co硬质合金。从合金微观组织结构参数（平均晶粒度、邻接度、晶粒分布）和力学性能对湿磨工艺的敏感度方面，探讨了硬质合金关键原材料WC粉末内在质量的评定方法。结果表明，合金微观组织结构和力学性能对湿磨工艺变化的敏感度较低，在一定程度上反映了XLWC25型WC粉末具有较好的内在质量。采用搅拌湿磨工艺，湿磨6~10 h，WC-6Co合金的微观组织结构均匀性和综合性能可达到最佳状态，优于滚动湿磨58 h制备的参比合金的综合性能。
이XLWC25형WC분말위원료，채용곤동습마화교반습마공예경과불동적습마시간제비5조WC-6Co경질합금。종합금미관조직결구삼수（평균정립도、린접도、정립분포）화역학성능대습마공예적민감도방면，탐토료경질합금관건원재료WC분말내재질량적평정방법。결과표명，합금미관조직결구화역학성능대습마공예변화적민감도교저，재일정정도상반영료XLWC25형WC분말구유교호적내재질량。채용교반습마공예，습마6~10 h，WC-6Co합금적미관조직결구균균성화종합성능가체도최가상태，우우곤동습마58 h제비적삼비합금적종합성능。
Using XLWC25 type WC powder as the raw material, five groups of WC-6Co cemented carbides were prepared by attritor-milling and ball-milling with different wet-milling time. Based on the sensibility of the microstructure and mechanical properties of cemented carbides on the wet-milling techniques, an evaluation method of the intrinsic quality of tungsten carbide powders was proposed. The micro-structural parameters, including mean WC grain size, contiguity of WC grains and WC grain size distribution. The results show that sensibility of the microstructure and properties of the five alloys relate loosely to the wet-milling techniques, which indicates that XLWC25 type WC powder has an excellent intrinsic quality. In addition, the comprehensive properties and the microstructure homogeneity of WC-6Co cemented carbide prepared by attritor-milling for 6~10 h reach an optimal state, which are superior to the alloy prepared by ball-milling for 58 h.