The surface of the aluminum alloy extruded tube peels and bubbles

Aluminum alloy extruded tube, the surface of the aluminum tube is peeling or blistering.

It may be because the extrusion barrel is worn beyond the standard. In this case, the extrusion barrel should be corrected and replaced.

The extrusion barrel is too dirty, stained with oil, graphite, and water. The extrusion barrel needs to be cleaned.

The diameter difference between the two extrusion gaskets used at the same time is too large, and the extrusion gasket needs to be corrected and updated.

The extrusion barrel temperature and extrusion temperature are too high, and the extrusion barrel temperature of the aluminum tube needs to be adjusted.

The ingot itself has sand holes and bubbles, and the ingot casting of the aluminum tube needs to be improved

The ingot diameter exceeds the allowable negative deviation, which also requires improving the ingot casting of the aluminum tube.

There are metal burrs or pitting on the surface of the aluminum tube. It may be because the extrusion temperature is too high or there is metal stuck to the mold. In this case, the metal on the mold needs to be cleaned.

If the extrusion speed is too fast or uneven, the ingot is too long, it will also cause metal pitting, the mold working zone is too wide or not smooth enough, in this case, the working zone needs to be corrected and polished.