Patent ID: 8100313
Filing Date: 2012-01-24
Classification: B21B,B23K,B23P,C22C,H01M,Y02E,Y02P,Y10S,Y10T

Abstract:
1. A method for producing a source blank for a stainless steel three-ply clad sheet, comprising producing a source blank for a clad steel sheet composed of a stainless steel having a B content of 0 to 0.3% by mass as a core component and a stainless steel having a B content of 0.3 to 2.5% by mass as face components, the face components each being combined with each of major faces of the core component through steps shown by the following Steps 1 to 5: Step 1: disposing, on side end surfaces, other than a working plane, of the face component, protectors with a length greater than the length of the side end surfaces of the face component, and disposing tabs each in abutting relation with an extension of the protector's face to abut on the side end face of the face component, where the extension is an extra length portion exceeding the length of the side end face of the face component; Step 2: performing bonding at boundary regions between the tabs and the protectors disposed in Step 1 and between the face component and the protectors in such a manner that the boundary region between the tab and the protector becomes a starting point of the bonding; Step 3: removing the tabs and extended portions of the protectors bonded with the tabs to thereby obtain a bonded composite of the face component and protectors; Step 4: piling the bonded composites of the face component and protectors produced in Step 3 on the core component so that each relevant face of the core component to be clad contacts with the relevant face of the face components in cladding relation therewith to thereby obtain a combined block; and Step 5: performing, in the combined block obtained in Step 4, bonding at boundary regions between the face components and the core component and between the protectors and the core component at respective boundary regions to thereby obtain the source blank for a stainless steel three-ply clad sheet.