Method for Welding Metal-Based Materials

• US 20180056432A1
• Filed: 03/11/2016
• Published: 03/01/2018
• Est. Priority Date: 03/13/2015
• Status: Active Grant

• Current Assignee: Outokumpu Oyi
• Original Assignee: Outokumpu Oyi
• Inventors: Lindner, Stefan, Skrlec, Jasminko
• Granted Patent: US 10,946,469 B2
• Time in Patent Office: Days
• CPC Class Codes: B23K 10/02 Plasma welding
• CPC Class Codes: B23K 11/061 for welding rectilinear seams
• CPC Class Codes: B23K 11/115 by means of two electrodes placed opposite one another on both sides of the welded parts
• CPC Class Codes: B23K 11/14 Projection welding
• CPC Class Codes: B23K 11/20 of different metals
• CPC Class Codes: B23K 15/0046 Welding
• CPC Class Codes: B23K 26/22 Spot welding
• CPC Class Codes: B23K 28/02 Combined welding or cutting procedures or apparatus
• CPC Class Codes: B23K 9/173 and of a consumable electrode

Abstract

The invention relates to a method of welding of at least two metal-based materials (5, 7), non-weldable directly to each other with resistance welding. At least one spacer (6) is joined by welding on at least one of the two surfaces of a material (5) in every interstice between two surfaces of materials to be welded. The welded spacer (6) is utilized so that resistance welding is focused to the surface of the material (5) with the spacer (6) to melt at least one spacer (6) located on the heat affecting zone in order to achieve a weld between the metal-based materials (5, 7).

Claims

1. A method for welding at least two metal-based materials, non-weldable directly to each other with resistance welding, comprising providing at least one spacer joined by welding on at least one of the two surfaces of a material in every interstice between two surfaces of materials to be welded, and utilizing the welded spacer so that resistance welding is focused to the surface of the material with the spacer to melt at least one spacer located on the heat affecting zone in order to achieve a weld between the metal-based materials.

2. The method according to claim 1, wherein the spacer is welded by arc welding.

3. The method according to claim 1, wherein the spacer is welded by plasma welding.

4. The method according to claim 1, wherein the spacer is welded by gas metal arc welding.

5. The method according to claim 1, wherein the spacer is welded by beam welding.

6. The method according to claim 1, wherein the spacer is welded by laser beam welding.

7. The method according to claim 1, wherein the spacer is welded by electron beam welding.

8. The method according to claim 1, wherein the resistance welding is carried out by spot welding.

9. The method according to claim 1, wherein the resistance welding is carried out by roller seam welding.

10. The method according to claim 1, wherein the resistance welding is carried out by projection welding.

11. The method according to claim 1, wherein the resistance welding is carried out by weldbonding.

12. The method according to claim 1, wherein the spacer is welded on the surface of steel containing more than 0.25 weight % C, more than 3 weight % Mn, more than 0.1 weight % N and more than 3 weight % Mo.

13. The method according to claim 1, wherein the spacer calculated in accordance with the Schaeffler diagram is welded on the surface of the first material to be welded.

14. The method according to claim 1, wherein the spacer is welded on the surface of steel having the carbon equivalent (CEV) more than 0.65%, where CEV is calculated using a formula (element contents by weight %) CEV=C+Mn/6+(Cu+Ni)/15+(Cr+Mo+V)/5.

15. The method according to claim 1, wherein the spacer is welded on the surface of aluminium.

16. The method according to claim 1, wherein the spacer is made of a filler material.

17. The method according to claim 1, wherein the spacer is made of a braze material.

18. The method according to claim 1, wherein a gap defined by the spacer is achieved between the welded materials.

19. The method according to claim 18, wherein in the spacer a proportion of diameter to height is at least five.

20. The method according to claim 1, wherein crevice conditions are prevented between the materials to be welded by coating the surfaces of the materials and the spacer.

21. The method according to claim 1, wherein a steam channel in an adhesive for corrosive substance to reach the welding area is prevented to create by the spacer replacing the adhesive material at the area of the resistance welding area.

22. The method according to claim 1, wherein a spacer makes possible to control and to have a desired direction for the welding heat.