Clad alloy substrates and method for making same

• US 20050273994A1
• Filed: 06/10/2004
• Published: 12/15/2005
• Est. Priority Date: 06/10/2004
• Status: Active Grant

• Current Assignee: ATI Properties Incorporated (Allegheny Technologies Incorporated)
• Original Assignee: ATI Properties Incorporated (Allegheny Technologies Incorporated)
• Inventors: Bergstrom, David S., Tarhay, Mark A., Schott, Kris J.
• Granted Patent: US 8,387,228 B2
• Time in Patent Office: Days
• US Class Current: 29/514
• CPC Class Codes: B23K 20/04 by means of a rolling mill
• CPC Class Codes: B23K 20/227 with ferrous layer
• CPC Class Codes: B23K 2103/16 Composite materials , e.g. fibre reinforced
• CPC Class Codes: B23K 2103/172 wherein at least one of the layers is non-metallic
• CPC Class Codes: B23K 33/00 Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby B23K11/14 takes precedence
• CPC Class Codes: B23P 11/00 Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for connecting sheet metal or metal tubes, rods or profiles B21D39/00; riveting B21J; soldering, unsoldering, welding B23K; hand tools for connecting wire or strip B25B25/00; connecting metal parts by adhesives F16B11/00
• CPC Class Codes: Y10S 29/904 Laminated metal article making
• CPC Class Codes: Y10T 29/49366 Sheet joined to sheet
• CPC Class Codes: Y10T 29/49908 Joining by deforming
• CPC Class Codes: Y10T 29/49924 of parallel side-by-side elongated members
• CPC Class Codes: Y10T 29/49936 Surface interlocking
• CPC Class Codes: Y10T 428/12264 having outward flange, gripping means or interlocking feature
• CPC Class Codes: Y10T 428/12486 Laterally noncoextensive components [e.g., embedded, etc.]
• CPC Class Codes: Y10T 428/12493 Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
• CPC Class Codes: Y10T 428/12507 More than two components
• CPC Class Codes: Y10T 428/12937 Co- or Ni-base component next to Fe-base component
• CPC Class Codes: Y10T 428/12944 Ni-base component
• CPC Class Codes: Y10T 428/12951 Fe-base component

Abstract

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.

Claims

1. A method for producing a clad product, the method comprising:

providing a welded assembly comprising a cladding material disposed on a substrate material, both the substrate material and the cladding material individually selected from alloys, wherein in the welded assembly at least a first edge of the cladding material does not extend to a first edge of the substrate material and thereby provides a margin between the first edges, and wherein 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; and

hot rolling the welded assembly to provide a hot rolled band, wherein the material within the margin inhibits the cladding material from spreading beyond the edge of the substrate material during the hot rolling.

2. The method of claim 1, wherein in the welded assembly the cladding material and the substrate are plates and the margin is between a first edge of the plate of the cladding material and a first edge of the plate of the substrate material.

3. The method of claim 2, wherein the material having greater hot strength than the cladding material is the substrate material.

4. The method of claim 3, wherein the plate of the cladding material is disposed in a recess formed in a surface of the plate of the substrate material so that a projecting portion of the substrate material defines at least one wall of the recess and is within the margin and adjacent at least the first edge of the plate of the cladding material.

5. The method of claim 4, wherein the recess is provided in the surface of the plate of the substrate material by one of casting, forging, machining and a material removal process.

6. The method of claim 2, wherein the plate of the cladding material has a length and a width, respectively, that are less than a length and a width of the plate of the substrate material so that the margin extends around the entire periphery of the plate of the substrate material.

7. The method of claim 4, wherein the plate of the cladding material has a length and a width, respectively, that are less than a length and a width of the plate of the substrate material, and wherein the projecting portion of the plate of the substrate material extends around the entire periphery of the plate of the substrate material to define the perimeter wall of the recess and is adjacent the entire peripheral edge of the plate of the cladding material.

8. The method of claim 2, wherein at least one framing element of the material that is an alloy having hot strength less than the cladding material is positioned on the plate of the substrate material within the margin and adjacent the first edge of the plate of the cladding material.

9. The method of claim 2, wherein the plate of the cladding material has a length and a width, respectively, that are less than a length and a width of the plate of the substrate material, the margin surrounds the entire periphery of the plate of the cladding material, and one or more framing elements are positioned on the plate of the substrate material within the margin and adjacent the entire peripheral edge of the plate of the cladding material.

10. The method of claim 2, wherein the substrate material is selected from the group consisting of stainless steel and carbon steel.

11. The method of claim 2, wherein the substrate material is selected from the group consisting of T-316L stainless steel, T-316 stainless steel, T-304L stainless steel and T-304 stainless steel.

12. The method of claim 2, wherein the cladding material is selected from the group consisting of nickel, a nickel alloy, copper, a copper alloy, and a stainless steel.

13. The method of claim 2, wherein the cladding material is selected from UNS N02200 nickel and UNS N02201 nickel

14. The method of claim 2, wherein the material within the margin having a hot strength greater than the cladding material is selected from the group consisting of stainless steel, a nickel-base superalloy, and a cobalt-base superalloy.

15. The method of claim 2, wherein the material within the margin having a hot strength greater than the cladding material is selected from the group consisting of T-316L stainless steel and T-304 stainless steel.

16. The method of any of claims 1 and 2, wherein the method further comprises:

optionally annealing the hot rolled band; and

cold rolling the hot rolled band to a clad strip having a desired gauge.

17. The method of claim 2, wherein providing the welded assembly further comprises welding the material in the margin to the plate of the cladding material and the plate of the substrate material.

18. The method of claim 3, wherein providing the welded assembly further comprises welding the portion of the plate of the substrate material in the margin to the plate of the cladding material.

19. The method of claim 16, wherein cold rolling the hot rolled band to a clad strip having a desired gauge comprises two or more steps of cold rolling, wherein the cold rolled strip is annealed intermediate successive steps of cold rolling.

21. The method of claim 2, wherein the clad product is a dual-clad product and the welded assembly comprises two plates of cladding material, one of the plates of cladding material being disposed on each of the opposed surfaces of the plate of the substrate material.

22. The method of any of claims 1, 2 and 16 wherein the cladding material is nickel UNS N02201 nickel, the substrate material is T-316L stainless steel, and the material disposed in the margin is selected from T-316L stainless steel and T-304 stainless steel.

38. A method of making an article of manufacture, the method comprising:

making a clad product by the method of any of claims 1, 30, 39 and 47; and

fabricating the clad product into the article of manufacture.

39. The method of claim 38 wherein the article of manufacture is selected form the group consisting of a cistern, a chimney flue, a battery, tubing, a heat exchanger, a pipe, a tank, and an item of cookware.

23. A method for producing a clad stainless steel, the method comprising:

providing a welded assembly comprising

disposing a plate of a cladding material composed of an alloy on a stainless steel plate, wherein at least a first edge of the plate of the cladding material does not extend to a first edge of the stainless steel plate and thereby provides a margin on the stainless steel plate,

disposing at least one framing element within the margin and adjacent the first edge, wherein the framing element is an alloy having greater hot strength than the cladding material, and

welding the plate of the cladding material to the framing element and welding the framing element to the stainless steel plate; and

hot rolling the welded assembly to provide a hot rolled band, wherein the framing element inhibits the cladding material from spreading beyond the first edge of the stainless steel plate during the hot rolling.

20. The method of claim 23, wherein the cold rolled strip is bright annealed intermediate at least two successive steps of cold rolling.

24. The method of claim 23, wherein the plate of the cladding material has a length and a width, respectively, that are less than a length and a width of the plate of the substrate material and each edge of the plate of the cladding material is spaced from the adjacent edge of the stainless steel plate so that a margin extends around the entire periphery of the stainless steel plate, and further wherein one or more framing elements are disposed in the margin around the entire periphery of the plate of the cladding material.

25. The method of claim 23, wherein the stainless steel plate is composed of a material selected from T-316L stainless steel, T-316 stainless steel, T-304L stainless steel and T-304 stainless steel.

26. The method of claim 23, wherein the cladding material is selected from the group consisting of nickel, a nickel alloy, copper, a copper alloy, and a stainless steel

27. The method of claim 23, wherein the one or more framing elements are selected from the group consisting of stainless steel, a nickel-base superalloy and a cobalt-base superalloy.

28. The method of claim 31, wherein the cladding material is nickel, the stainless steel plate is T-316L stainless steel, and the one or more framing elements are one of T-316L stainless steel and T-304 stainless steel.

29. The method of claim 23, wherein the clad product is a dual clad product, and providing the welded assembly comprises:

disposing a plate of a cladding material composed of an alloy on each of the opposed surfaces of a stainless steel plate, wherein at least a first edge of each of the plates of the cladding material does not extend to a first edge of the stainless steel plate and thereby provides a margin on each of the opposed surfaces of the stainless steel plate,

disposing at least one framing element composed of an alloy having hot strength greater than the cladding material in the margin and adjacent the first edge of each plate of cladding material, and

welding each of plate of cladding material and the stainless steel plate to the adjacent framing element.

30. The method of claim 29, wherein each of plate of cladding material has a length and a width, respectively, that are less than a length and a width of the stainless steel plate and are disposed on the stainless steel plate so that the margin extends around the entire periphery of the stainless steel plate on each opposed face of the stainless steel plate, and wherein one or more framing elements is disposed in the margin around the entire periphery of each plate of cladding material.

31. The method of any of claims 23 and 29, wherein the method further comprises:

optionally annealing the hot rolled band; and

cold rolling the hot rolled band to a clad strip having a desired gauge.

32. A method for producing a clad stainless steel, the method comprising hot rolling a welded assembly to provide a hot rolled band, the welded assembly comprising a stainless steel plate welded to a plate of an alloy cladding material, the plate of cladding material being disposed in a recess on a surface of the stainless steel plate such that a projecting portion of the stainless steel plate defines the recess and surrounds the peripheral edge of the plate of cladding material, wherein the projecting portion of the stainless steel plate inhibits the cladding material from spreading beyond an edge of the stainless steel during the hot rolling.

33. The method of claim 32, wherein the stainless steel plate is composed of a material selected from T-316L stainless steel, T-316 stainless steel, T-304L stainless steel and T-304 stainless steel.

34. The method of claim 32, wherein the cladding material is selected from the group consisting of nickel, a nickel alloy, copper, a copper alloy, and a stainless steel.

35. The method of claim 32, wherein the clad product is a dual clad product, and the welded assembly comprises two plates of an alloy cladding material, each plate of cladding material disposed in a recess on each of the opposed surfaces of the stainless steel plate such that a projecting portion of the stainless steel plate on each opposed surface of the stainless steel plate defines the recess on the particular surface of the stainless steel plate and surrounds a peripheral edge of the plate of cladding material in the recess.

36. The method of claim 32, further comprising:

optionally annealing the hot rolled band; and

cold rolling the hot rolled band to a clad strip having a desired gauge.

37. A method of making a dual clad stainless steel strip, the method comprising:

providing a welded assembly comprising

disposing a plate of a cladding material selected from nickel and a nickel alloy within a recess on each opposed surface of a stainless steel plate such that a projecting margin on each opposed surface of the stainless steel plate defines the recess on that surface and surrounds the peripheral edge of the plate of cladding material within the recess; and

welding each plate of the cladding material to the adjacent projecting margin of the stainless steel plate; and

hot rolling the welded assembly to provide a hot rolled band; and

cold rolling the hot rolled band to a desired gauge.

40. A welded assembly useful in the production of clad products, the welded assembly comprising a cladding material disposed on a substrate material, both the substrate material and the cladding material being an individually selected alloy, wherein in the welded assembly at least a first edge of the cladding material does not extend to a first edge of the substrate material and thereby provides a margin between the first edges, and wherein an alloy having hot strength greater than the cladding material is within the margin and adjacent the first edge of the cladding material.

41. A welded assembly useful for producing a clad product, the welded assembly comprising:

a stainless steel plate having a first edge;

a plate of an alloy cladding material having a first edge, wherein the plate of the cladding material is disposed on a surface of the stainless steel plate, and wherein the first edge of the plate of the cladding material does not extend to the first edge of the stainless steel plate and thereby provides a margin on the stainless steel plate between the first edges; and

a framing element within the margin and adjacent the first edge of the plate of the cladding material, wherein the framing element is an alloy having hot strength greater than the cladding material, and wherein the framing element is welded to the stainless steel plate and the plate of the cladding material.