Clad alloy substrates and method for making same

B - Operations – Transporting – 23 – K

Patent

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B23K 20/04 (2006.01)

Patent

CA 2569855

A method for producing a single-clad or multiple-clad product includes providing a welded assembly comprising a cladding material disposed on a substrate material. Both the substrate material and the cladding material are individually selected alloys. At least a first edge of the cladding material of the welded assembly does not extend to a first edge of the substrate material and thereby provides a margin between the first edges. A material that is an alloy having hot strength greater than the cladding material is within the margin and adjacent the first edge of the cladding material. The welded assembly is hot rolled to provide a hot rolled band, and the material within the margin inhibits the cladding material from spreading beyond the edge of the substrate material during the hot rolling. In certain embodiments of the methods, the substrate material is stainless steel and the cladding material is nickel or a nickel alloy.

L'invention concerne un procédé permettant de préparer un produit à placage simple ou multiple, consistant à préparer un ensemble soudé comprenant un matériau de placage disposé sur un matériau de substrat. Le matériau du substrat et le matériau de placage comprennent chacun un alliage choisi séparément. Au moins un premier bord du matériau de placage de l'ensemble soudé ne s'étend pas jusqu'au premier bord du matériau de substrat, de sorte qu'une marge est formée entre les deux premiers bords. Un matériau comprenant un alliage présentant une résistance en traction supérieure à celle du matériau de placage, est disposé dans cette marge, dans une position adjacente au premier bord du matériau de placage. L'étape suivant consiste à laminer l'ensemble soudé à chaud, afin de former une bande laminée à chaud, et le matériau présent dans la marge empêche le matériau de placage de s'étaler au-delà du bord du matériau du substrat pendant le laminage à chaud. Dans certains modes de mise en oeuvre de ces procédés, le matériau du substrat est l'acier inoxydable, et le matériau de placage est le nickel ou un alliage nickel.

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