微波烧结WC Co细晶硬质合金的工艺与性能

Property and technology of WC Co fine grain cemented carbide in microwave sintering

采用微波烧结新技术研究了ＷＣＣｏ 细晶硬质合金的烧结工艺与性能， 并同常规烧结工艺进行了比较。结果表明： 微波烧结ＷＣＣｏ 细晶硬质合金在１ ３００ ℃的烧结温度下保温１０ ｍｉｎ 时， 可达到９９ ．８ ％ 的相对密度； 烧结温度降低， 烧结时间大幅度缩短， 且制品的显微晶粒尺寸只有常规烧结的一半； 抗弯强度、矫顽磁力。

Using the microwave sintering new technology, the technology and property of WC Co fine grain cemented carbide in microwave sintering was studied and compared with conventional sintering technology. The results show that microwave sintered WC Co fine grain cemented carbide can reach 99.8% relative density in 1 300 ℃ sintering temperature and 10 min preservation. The microwave sintering not only can reduce sintering temperature and shorten sintering time in large range, but also can decrease micro grain size of products over less one half and increase bending strength, coercive force and hardness in large range compared with conventional sintering.