济南铝板折弯开裂是什么原因？
1、折弯的边与济南铝板http://www.jngdly.com/的轧制方向平行，这样很容易开裂，将折弯方向转90度，180度折弯角度太多，要大于最小折弯半径，一般折弯半径为板厚的1.5倍。
Bending the rolling direction parallel to the edge of Jinan aluminum, it is easy to crack, turn 90 degrees to the direction of the bend too much bending angle of 180 degrees, to be greater than the minimum bend radius, usually bend
radius for thickness 1.5 times.
2、材料的原因，有的济南铝板生产厂家使用合金的铝板，韧性没有纯铝铝板好，易开裂。
The reason the material, some manufacturers use aluminum Jinan aluminum alloys, aluminum aluminum toughness no good, easy to crack.
3、济南板材厚度太厚，折弯180度超出了材料的弯曲极限。
Jinan thick sheet thickness, bend 180 degrees beyond the limit of the material is bent.
4、济南铝板http://www.jngdly.com/折弯出现裂纹，一般是磷含量偏高。
Jinan aluminum bending cracks, generally high phosphorus content.
