日本线材的拉丝加工工艺的过程如下: 线坯由于是经热轧而加工成所规定的尺寸,所以线材表面上附着有一层氧化物,除去这层氧化物的处理是决定线材制品表面性状的过程。此后,除去线材上附着的剩余氧化物微粉和给以施上磷酸被膜,然后进行一次拉丝。拉丝后,线材进行调质的热处理,此时,线材表面上重又覆盖一层氧化物,所以必 Japan wire drawing process is as follows: wire blank is processed into the required size by the hot-rolled, so the surface of the wire attached to a layer of oxide, remove the oxide layer is the process of determining the surface properties of wire products . After that, the remaining oxide fine powder adhering to the wire was removed and the phosphate coating was applied, followed by one drawing. After drawing, the wire heat treatment of quenched and tempered, this time, the wire surface covered with a layer of oxide again, so must