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一般冷軋鋼如鍍鋅、彩鋼板都須退火，所以塑性和延伸率也較好，廣泛應(yīng)用于汽車、家電、五金等行業(yè)。冷軋板表面有一定的光潔度，

手摸起來比較光滑，主要是酸洗之功。熱軋板一般表面光潔度達(dá)不到要求，所以熱軋鋼帶需冷軋，還有熱軋鋼帶厚度最薄一般在1.0mm，

冷軋可達(dá)到0.1mm。熱軋是結(jié)晶溫度點以上的軋制,冷軋是結(jié)晶溫度點以下的軋制。冷軋對鋼材形狀的改變屬于連續(xù)冷變形，

此過程引起的冷作硬化使軋硬卷的強(qiáng)度、硬度上升、韌塑指標(biāo)下降。

Generally cold-rolled steel such as galvanized, color steel plate must be annealed, so the plasticity and elongation rate is also good, widely used in automobile,

home appliances, hardware and other industries.Cold rolled plate surface has a certain degree of finish, the hand touch is relatively smooth, mainly pickling work.

The surface finish of the hot rolled plate can not meet the requirements, so the hot rolled strip needs cold rolling,

and the thinnest thickness of the hot rolled strip is generally 1.0mm, and the cold rolling can reach 0.1mm.

Hot rolling is rolling above the crystallization temperature point, and cold rolling is rolling below the crystallization temperature point.

The change of steel shape by cold rolling belongs to continuous cold deformation. The cold hardening caused by this process increases the strength,

hardness and toughness index of the rolling roll.