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硬质合金是制造工具的优质材料。而废硬质合金在我国资源量大,对其再生利用意义重大。过去,国内普遍采用的回收再生方法是硝石熔融法,但工艺流程长,辅助材料消耗大,金属回收率低.对环境有污染,所以回收方法亟待改进。从这一情况出发,株洲硬质合金厂探索出了硬质合金再生利用新法——锌熔法。锌熔法的基本原理是:在一定温度(一般为900℃)下,锌能与硬质合金中的钴形成一种低熔点锌钴合金,从而减弱了始对合金中碳化物的粘结作用,使碳化物散开,然后利用锌钴两种金属的蒸气压相差极大(1000℃时,锌的
Carbide is a premium material for manufacturing tools. The waste carbide in our country a large amount of resources, the significance of its regeneration and utilization. In the past, the recycling method commonly used in China was the saltpetre melting method, but the process was long, the consumption of auxiliary materials was high, the metal recovery rate was low, and the environment was polluted. Therefore, the recovery method should be improved urgently. Starting from this situation, Zhuzhou Cemented Carbide Factory explored a new method of carbide recycling - zinc melt method. The basic principle of the zinc melting method is that at a certain temperature (usually 900 ° C), zinc forms a low-melting-point zinc-cobalt alloy with the cobalt in the cemented carbide, thereby weakening the initial bonding to the carbides in the alloy , So that carbide dispersed, and then use the cobalt and cobalt two kinds of metal vapor pressure difference (1000 ℃, the zinc