Stainless steel surface de-scaling abrasive material and using method thereof

Abstract

The invention relates to a grinding medium for stainless-steel surface descaling and a method of utilization. The descaling and grinding medium is characterized in that steel sand is added into the steel shot, and the proportions of the steel sand and steel shot (calculated by weight percent) are: steel sand (3-19) and steel shot (1); the granularity of the steel sand is 0.35mm-0.45mm, and the granularity of the steel shot is 0.3mm-0.4mm. In terms of method of utilization, (1) adjustment of shot-blast coefficient: the coefficient of the shot-blast is lowed to 1.2-1.3 and the rotation speed of the impeller head is timely reduced to 1,850 r / min; (2) adjustment of relevant process: during the stable stage of grinding medium grinding, the heating temperature is increased gradually, and the temperature of the plate increases to 1125-1145 DEG C, the pressure of the brushing roller and cleaning water is reduced. If the grinding medium and the method of utilization are applied, the production cost can be reduced and the coarse value of the surface cold-rolled raw materials can be reduced to a large extent.

Description

technical field [0001] The invention relates to a stainless steel surface descaling abrasive and a using method thereof. Background technique [0002] During the hot rolling process of stainless steel cold-rolled raw materials, dense oxide scales are densely attached to the surface of the steel plate, which seriously affects the cleaning effect and the smoothness of the stainless steel surface during the pickling process, so the dense oxide scales on the surface of the raw materials must be removed. Generally, abrasives are used for mechanical descaling. The existing mechanical abrasives are steel shot. Using steel shot for descaling will easily cause oxide scale residue on the surface of stainless steel after pickling and increase in roughness, which will affect the surface quality of stainless steel products. The descaling effect is poor. After pickling, the surface roughness of the stainless steel reaches more than 4 μm, and the consumption of steel shots as abrasives is ...

AI Technical Summary

Problems solved by technology

Generally, abrasives are used for mechanical descaling. The existing mechanical abrasives are steel shot. Using steel shot for descaling will easily cause oxide scale residue on the surface of stainless steel after pickling and increase in roughness, which will affect the surface quality of stainless steel products. The descaling effect is poor. After pickling, the surface roughness of the stainless steel reaches more than 4 μm, and the consumption of steel shots as abrasives is large, and the consumption of steel shots per ton of steel is as high as 5Kg. The pellet dust is large, which increases the dust removal pressure and further affects the quality of the stainless steel surface