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（1）軋輥直徑對寬展的影響

(1) effect of roll diameter on spread

在其他條件不變的情況下，隨著軋輥直徑的增加，變形區(qū)長度增加，寬展值相應加大。

In the case of other conditions unchanged, with the increase of roll diameter, length of deformation zone increases, increased the value of spread.

（2）軋件寬度對寬展的影響

(2) influence of strip width on the spread

隨著軋件寬度的增加，變形區(qū)的金屬在橫向流動的阻力增加，導致寬展量減小。

With the increase of strip width, the increase in the deformation zone of metal transverse flow resistance, resulting in reduced amount of spread.

（3）軋輥工作表面對寬展的影響

(3) the influence of the roller working surface to spread

實踐證明，使用表面粗糙的軋輥軋制，比使用表面光滑的軋輥軋制，軋件的寬展量大，這是由于前者比后者表面摩擦系數(shù)大的緣故。

Practice has proved that the use of the roll surface roughness, than the use of roller rolling smooth surface, large amount of spread of the workpiece, which is due to the former than the latter because of the surface friction coefficient.

所有使摩擦系數(shù)增大的因素，都促使寬展量加大。例如孔型磨老（變粗糙），軋件的寬展量就會增大。因為鋼軋輥不如鑄鐵軋輥耐磨，所以，在軋制一段時間之后，用鋼軋輥軋制的軋件比用鑄鐵軋輥軋制的軋件寬展量大。

All the friction coefficient increased factors have prompted the increase amount of spread. For example, the old mill pass (rough), will increase the amount of spread rolling. Because the steel roll as cast iron roll wear, so, after a period of time by rolling, rolling steel roller rolling iron roller than the workpiece width large amount.

（4）軋制速度與溫度對寬展的影響

(4) effect of rolling speed and temperature on the spread of

當軋制速度超過2m/s時，軋制速度愈高，摩擦系數(shù)愈低。熱軋時溫度愈高，摩擦系數(shù)愈低。凡是使摩擦系數(shù)降低的因素都是減小軋件寬展的因素。

When the rolling speed is more than 2m/s, the rolling speed is higher and the friction coefficient is lower. The higher the temperature is, the lower the friction coefficient is. All the factors are friction coefficient decrease factors reduced the spread of rolled piece.