冷拉扁鐵工藝
冷拉扁鐵 分為油拔和粉拔兩種生產工藝，粉拔工藝的鐵材表面沒有油，帶有一層粉末透明體保護膜，這種膜是潤滑
粉生成的，在冷拔過程中起到潤滑，冷拔后起到防銹的作用，油拔表面會生成一種油膜，和粉拔一樣在冷拔過程中起
到潤滑，冷拔后起到防銹作用。
這要從生產工藝說起，冷拉扁鐵 的原材料是熱軋鋼，在進行粉拔工藝時會添加一種潤滑粉，這種潤滑粉分為石墨粉，
二硫化鉬粉，氫氧化鈣粉，添加不同的潤滑粉，拔出的顏色也不同，拔出的冷拔鐵表面顏色分別是黑色，灰色，透明色，所
以我們?？吹降睦浒舞F的外觀顏色不同，就是這個原因，它與冷拔鋼的質量沒有關系，這種潤滑粉只是起到潤滑作用，在一
定時間內也防銹作用。
還有一種冷拔工藝，冷拔出來的冷拉扁鐵 ，表面光滑精度高，這也是為什么同樣材質同樣規(guī)格的扁鐵表面是那么光滑，
表面無印記。
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