Views:0 Author:Site Editor Publish Time: 2017-08-09 Origin:Site
The crack of aluminum profile is caused by tensile stress when the profile is extruded, and the transverse tearing of metal is formed in different degree. The main reason for this phenomenon, after analysis, mainly in the following:
The reason of fracture of aluminum alloy sputtering target：
First, because of the friction force, the metal surface is subjected to additional tensile stress, and cracks occur when the additional tensile stress is greater than the tensile strength of the surface metal;
Second, the extrusion temperature is too high, the tensile strength of the metal surface decreases, and cracks occur under the action of the friction force;
Third, when the extrusion speed is too high, the additional tensile stress on the metal surface increases, resulting in cracks in the profile.
To solve this problem, it is necessary to strictly control the extrusion process parameters so as to ensure reasonable export speed and exit temperature, so as to reduce the cracks in aluminum profile. This requires of the company strictly check and supervise production process.