硬质合金作为模具,已在我国工矿企业得到广泛采用,特别是大大小小,各种形状的拔丝模,几乎都采用了YG8的硬质合金。作为拔丝模具,对型腔的几何形状和光洁度要求特别高((?)10以上)。如果同样硬度的模具,光洁度提高一级,使用寿命将会大大提高。鉴于硬质合金具有高硬性,提高硬质合金型腔光浩度不是件容易的事情。 Carbide as a mold, has been widely used in China’s industrial and mining enterprises, especially large and small, wire drawing dies of various shapes, almost all used YG8 cemented carbide. As a wire drawing mold, the cavity geometry and finish requirements are particularly high ((?) 10 or more). If the same hardness of the mold, finish a level, the service life will be greatly enhanced. In view of cemented carbide with high hardness, to improve the cemented carbide cavity light intensity is not an easy task.