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1. The detachment between the chains causes the movement of the steel plate on the cold bed to be out of synch, resulting in scratches on the lower surface.
2. When the steel plate is lifted, it can easily cause edge rib damage, and the surface of the steel plate is scratched when the material is not regulated during discharge.
3. When the middle and middle plates are rubbed against each other, the edge burrs will be splashed on the surface of the middle plate to form a surface rolling pressure pit.
4. The scales left by the straightened carbon steel are easily formed in the process of straightening stainless steel composite plates.
5. The blank is grinded with coarse grinding wheels. Wear marks will appear on the surface of the plate during rolling, especially for thick plates above 20 mm.
6. The hearth roll is subjected to multiple effects such as high temperature gas and load, and it is very prone to surface nodules, resulting in the lower surface of the middle plate.
7. In the heating furnace, the heating temperature of the stainless steel composite plate is higher than that of the ordinary carbon steel. The stainless steel composite plate blank is easy to slide on the lower surface of the blank during slide movement.
Improvements:
1. Adjust the height of the large bed of the cooling bed to ensure that the chain runs on the same level and replace the damaged chain in time.
2. Standardize the use of hoisting steel hooks to avoid artificial scratches and ribs. At the same time, after pickling the steel plates, steel hooks were used to lift the steel plates.
3. For the rolling of thick gauges with a thickness of more than 10mm, the steel plate shall be opened quickly after the steel plate bites into the rolling mill to reduce the friction between the splint and the edge of the steel plate, and to avoid the pressurization of the edge burrs.
4, before the production of stainless steel plate to check whether the roller straightening scales, and timely clean-up.
5. After the steelmaking process grinds the surface of the blank with coarse grinding wheels, it uses a fine grinding wheel to reduce the depth of the wear scar on the surface of the blank so as to avoid the generation of wear marks on the surface of the steel plate after rolling.
6, to improve the material of the hearth roll, replace the original heat-resistant alloy hearth roll asbestos roll.
7. Select a higher temperature during the heating stage to ensure that the billets are burned and burned. Use a lower heating temperature during the soaking stage. When the furnace is inspected, the oxidized bond of the slider on the heating furnace chute is timely polished, and the damaged slider is replaced.
Introduction and Solution of Surface Quality Problems of Stainless Steel Clad Plates
Stainless steel composite panels are widely used in petroleum, chemical, mechanical, energy, and nuclear power industries. The following surface quality problems are more likely to occur during production: