How to make up for the defects of 304 stainless steel pipe surface thick wall

In the process of processing, we will find 304 stainless steel pipe will appear borderline cracks, scars, inclusions and scars and other surface defects, the reason for these defects is roughly due to the cast billet outer arc skin under the corner of the transverse crack, the crystallizer has small impurities mixed in, finishing did not clean the Stainless Steel Pipe surface oxidation slag, as well as in the rolling process due to the cast billet angles to the stainless steel pipe surface side turn caused by . These defects not only reduce the surface quality of the stainless steel tube, for the improvement of product quality has also had an impact, so do a good job of prevention and timely treatment of 304 Stainless Steel Tube surface defects is very important.

Casting billet surface with deep scratches because of the sector section of the local roller does not rotate, in order to prevent this from happening, to timely maintenance of the sector section, and strictly prohibit equipment overage service. If there are small impurities mixed in the crystallizer will cause changes in water quality, so the water samples in the crystallizer should be checked regularly. Weakening of stainless steel plate edge cracking wide to the degree and wide plate rolling edge of the uneven deformation, reduce the rolled steel plate when the plate width is the best way, that is, try to use the wide end of the cast billet to produce large width of the steel plate.

To prevent the corner temperature of the billet from entering the brittle zone during the bending process, the corner temperature of the billet with different widths should be controlled dynamically, and the bending section should be controlled by the water distribution zone. Reduce the uneven deformation throughout the rolled parts should reduce the difference in deformation resistance between the top and bottom of the rolled parts, the slab heating optimization process, reduce the temperature difference between the top and bottom of the cast billet. Prevent the occurrence of local depth burn marks and clean up the surface of the cast billet after finishing oxidation slag and other secondary defects, to be achieved by improving the 304 stainless steel pipe casting billet finishing capacity.