Production method for stainless steel single side composite rolls

Abstract

The invention relates to a production method for rolling required stainless steel single side composite rolls through two times of manufacturing of composite billets. A base plate of carbon steel and a compound plate of stainless steel of a first composite billet are formed by welding baffle strips into a rectangular frame on a first base plate and putting a first compound plate into the rectangular frame, a second compound plate is laid after the first compound plate is coated with separant, a second base plate is laid on the second compound plate, the second base plate is welded to baffle strips, a hole is drilled between the base plates to install a vacuumized tube, rolling is carried out after leakage detecting and vacuumizing, the four edges of a rolled piece are cut off, and a single side composite plate is obtained for standby; in second billet compositing process, a carbon steel plate identical with the single side composite plate is manufactured, end bevels are formed in the carbon steel plate, pressure is exerted on a pressure platform to attach the carbon steel plate to the single side composite plate, full-length welding, drilling, vacuumized tube installing, leakage detecting, vacuumizing and rolling are carried out after steel wire rods are stuffed into the end bevels between the carbon steel plate and the single side composite plate, so far hot rolling of a stainless steel single side composite roll is finished, the thickness of the stainless steel single side composite roll is increased to 20 mm from 10 mm, guarantee is provided for a large diameter spiral welded pipe, the surfaces of compound layers are more compact and smoother, the product quality is improved, and the bonding strength and the mechanical property of a compound interface are improved.

Description

technical field [0001] The invention relates to a method for producing a stainless steel single-sided composite coil with required quality through two composite blanks and final rolling. Background technique [0002] The existing stainless steel single-sided composite roll production method is to directly hot-roll the symmetrical composite blank to a corresponding thickness, and then divide it into two single-sided rolls after trimming on the Kaiping production line with double coilers. The single face coil can be sold as a product, or it can be further cold rolled into a thin strip coil. But this method has the following defects: [0003] 1.1. The thickness of the coil after slitting is difficult to meet the requirements: because the coiling capacity of the domestic hot rolling coiler is ≤20mm thick, the thickness of the single-sided coil after slitting is ≤10mm, and some large-diameter spiral welded pipes require wall thickness >10mm. [0004] 1.2. The stainless ste...

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Problems solved by technology

[0003] 1.1. The thickness of the coil after slitting is difficult to meet the requirements: because the coiling capacity of the domestic hot rolling coiler is ≤20mm thick, the thickness of the single-sided coil after slitting is ≤10mm, and some large-diameter spiral welded pipes require wall thickness >10mm

[0004] 1.2. The stainless steel surface quality of the single-sided composite coil does not meet the requirements: the above-mentioned production method, because the stainless steel is covered inside the substrate (carbon steel), does not contact the roll during rolling, so the smoothness and flatness of the stainless steel surface is not good. Very ideal, especially in cold rolling, it is difficult to reach the standard of 2B surface

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