阅读说明：本技术 用于生产焊接金属坯件的方法以及由此获得的焊接金属坯件 (Method for producing a welded metal blank and welded metal blank obtained thereby ) 是由 沃尔弗拉姆·埃林 尼科·万德尔博尔特 于 2019-03-07 设计创作，主要内容包括：本申请涉及生产焊接金属坯件(16)的方法,包括以下步骤：从第一金属带(2)和第二金属带(4)切割第一初始金属板(1)和第二初始金属板(3)；通过焊接使第一初始金属板(1)和第二初始金属板(3)接合以获得初始焊接金属坯件(9),所述初始焊接金属坯件(9)包括使第一初始金属板(1)和第二初始金属板(3)接合的焊接接头(10)；以及通过涉及金属熔融的过程切割所述初始焊接金属坯件(9)以获得至少一个最终焊接金属坯件(16),所述最终焊接金属坯件(16)包括通过焊接接头部分(19)而接合的第一金属坯件部分(17)和第二金属坯件部分(18),所述焊接接头部分(19)由在接合步骤期间获得的焊接接头(10)的一部分构成。(The present application relates to a method for producing a welded metal blank (16), comprising the steps of: cutting a first initial metal plate (1) and a second initial metal plate (3) from a first metal strip (2) and a second metal strip (4); joining, by welding, a first initial metal plate (1) and a second initial metal plate (3) to obtain an initial welded metal blank (9), said initial welded metal blank (9) comprising a welded joint (10) joining the first initial metal plate (1) and the second initial metal plate (3); and cutting the initial welded metal blank (9) by a process involving metal melting to obtain at least one final welded metal blank (16), the final welded metal blank (16) comprising a first metal blank part (17) and a second metal blank part (18) joined by a welded joint portion (19), the welded joint portion (19) being constituted by a portion of the welded joint (10) obtained during the joining step.)

1. A method for producing a welded metal blank (16), comprising the steps of:

-cutting at least a first initial metal sheet (1) from a first metal strip (2) and a second initial metal sheet (3) from a second metal strip (4);

-joining at least said first initial metal sheet (1) and said second initial metal sheet (3) by welding to obtain a sheet having an initial profile (C)₀) The initial weld metal blank (9) comprising forming the first initial metal sheet into the first initial weld metal blank (9)(1) A welded joint (10) joined to said second initial metal sheet (3); and

-cutting said initial welded metal blank (9) by a process involving metal melting to obtain at least one final profile (C)₁、C₂... -) comprising a first metal blank part (17) and a second metal blank part (18) joined by a weld joint portion (19), the weld joint portion (19) being constituted by a portion of the weld joint (10) obtained during the joining step.

2. Method according to claim 1, wherein the first initial metal sheet (1) and/or the second initial metal sheet (3) have a quadrangular-shaped profile, and in particular have a profile selected from a rectangular profile, a parallelogram-shaped profile or a trapezoidal profile.

3. The method of claim 1 or claim 2, wherein the joining step is a step of laser welding, electron beam welding, arc welding, friction stir welding or resistance welding.

4. The method according to any one of the preceding claims, wherein the length of the weld joint (10) obtained during the joining step is greater than or equal to 300mm, and preferably greater than or equal to 600 mm.

5. Method according to any one of the preceding claims, wherein the final profile (C) of the final welded metal blank (16)₁、C₂....) comprises at least one non-linear portion, and in particular at least one curvilinear portion.

6. Method according to any one of the preceding claims, wherein at least two final weld metal blanks (16) are cut from the initial weld metal blank (9) during the cutting step performed on the initial weld metal blank (9).

7. Method according to claim 6, wherein each final welded metal blank (16) has a delimited respective area (A)₁、A₂....) of the final contour (C)₁、C₂...) and the final contour (C) of all the final weld metal blanks (16) cut from the initial weld metal blank (9) under consideration₁、C₂....) defining an area (A)₁、A₂....) is strictly less than the initial contour (C) of the respective initial weld metal blank (6)₀) Defined area (A)₀)。

8. Method according to any one of the preceding claims, wherein the length of the weld joint portion (19) is less than or equal to 250mm for at least one final welded metal blank (16).

9. The method according to claim 8, wherein a ratio of a length of the weld joint portion (19) to a dimension of the final weld metal blank (16) perpendicular to the weld joint portion (19) is less than or equal to 1.

10. Method according to any one of the preceding claims, wherein the first metal belt (2) and the second metal belt (4) have different characteristics.

11. The method according to any one of the preceding claims, wherein the first initial metal sheet (1) and the second initial metal sheet (3) comprise a steel substrate (5).

12. The method according to claim 11, wherein the first initial metal sheet (1) and/or the second initial metal sheet (3) comprises a pre-coating (6) on at least one of the main faces of the substrate (5), the pre-coating (6) comprising an intermetallic alloy layer (7) and a metal alloy layer (8) extending on top of the intermetallic alloy layer (7), the metal alloy layer (8) being a layer of aluminum, a layer of an aluminum alloy, or a layer of an aluminum based alloy.

13. The method of claim 12, further comprising the steps of: for at least one of the first initial sheet metal (1) and the second initial sheet metal (3), removing the precoat layer (6) from at least a portion of the thickness of the precoat layer (6) at a weld edge (37) on at least one face of the first initial sheet metal (1) and/or the second initial sheet metal (3) before joining the first initial sheet metal (1) and the second initial sheet metal (3) by welding.

14. The method according to claim 12 or claim 13, wherein the final weld metal blank (16) has a thickness of 0.8mm to 5mm and comprises a peripheral edge surface (22) resulting from a cutting operation, the peripheral edge surface (22) extending from one main face to the other main face of the final weld metal blank (16), and wherein the step of cutting the initial weld metal blank (9) is a step of laser cutting, the laser cutting being performed in such a way that: which directly results in a surface fraction (S) of aluminum on the base area of the peripheral edge surface (22) directly produced by the laser cutting operation_{General assembly}) Greater than or equal to 9%, and a surface fraction (S) of aluminum on the lower half of the base area of the peripheral edge surface (22) directly resulting from the laser cutting operation_Bottom) Greater than or equal to 0.5%.

15. The method according to any of the preceding claims, wherein welding is performed using a filler material.

16. Method according to any one of the preceding claims, wherein the cutting step performed on the initial welded metal blank (9) is a step of plasma cutting, laser cutting or flame cutting.

17. Method according to any one of the preceding claims, wherein the initial weld metal blank (9) is subjected to a cutting step to obtain a final weld blank (16) that does not comprise any weld start or stop craters or defects.

18. A method for producing a press formed welded metal part, the method comprising the steps of:

-producing a final welded metal blank (16) using the method according to any one of the preceding claims;

-press-forming the final welded metal blank (16) into a three-dimensional shape to obtain a press-formed welded metal part, and

-optionally trimming the edges of the press formed weld metal part using 3D laser cutting to obtain a final press formed weld metal part, wherein the 3D laser cutting removes material from the press formed weld metal part over a width of less than or equal to 10 mm.

19. The method of claim 18, wherein the press forming step is a thermoforming step performed in a thermoforming press.

20. Method according to claim 19, wherein the first metal blank part (17) and the second metal blank part (18) of the final weld metal blank (16) comprise a steel matrix (5), and wherein the method further comprises the step of cooling the press formed weld metal component to obtain a press hardened press formed weld metal component, the cooling rate preferably being equal to or greater than a critical martensite or bainite cooling rate of at least one of the matrices of the final weld metal blank (16).

21. The method of claim 18, wherein the press forming step is a cold forming step.

22. A welded metal blank (16) comprising a first metal blank part (17) and a second metal blank part (18) joined by a weld joint (19), the welded metal blank(16) Including over the entire contour (C) of the welded metal blank (16)₁、C₂...) from one major face to the other major face of the welded metal blank (16), the peripheral edge surface (22) comprising the entire contour (C) of the welded metal blank (16)₁、C₂...) and a solidification stripe (28) extending over at least a portion of the height of the peripheral edge surface (22).

23. Weld metal blank (16) according to claim 22, wherein the contour (C) of the weld metal blank (16)₁、C₂....) comprises at least one non-linear portion, and in particular at least one curvilinear portion.

24. Weld metal blank (16) according to claim 22 or claim 23, wherein the length of the weld joint (19) is less than or equal to 250 mm.

25. A welded metal blank (16) according to any one of claims 22-24, wherein said first metal blank portion (17) and said second metal blank portion (18) comprise a steel base body (5).

26. A welded metal blank (16) according to any one of claims 22-25, wherein said first and second blank metal portions (17, 18) each comprise a steel substrate (5), said steel substrate (5) bearing on at least one face thereof a pre-coating (6), said pre-coating (6) comprising an intermetallic alloy layer (7) and a metal alloy layer (8) extending on top of said intermetallic alloy layer (7), said metal alloy layer (8) being a layer of aluminium, of an aluminium alloy, or of an aluminium based alloy.

27. The weld metal blank (16) according to claim 26, wherein the weld metal blank (16) has a thickness of 0.8mm to 5mm and a surface fraction (S) of aluminum on a base area of the peripheral edge surface (22)_{General assembly}) Is greater than or equal toEqual to 9%, and a surface fraction (S) of aluminum on the lower half of the base area of the peripheral edge surface (22)_Bottom) Greater than or equal to 0.5%.

28. Weld metal blank (16) according to any one of claims 22 to 27, wherein the weld joint (19) does not comprise any weld start or stop craters or defects.

29. A press formed welded metal part comprising a first metal part portion and a second metal part portion joined by a weld joint, the press formed welded metal part comprising a peripheral edge surface extending over the entire contour of the welded metal part, the peripheral edge surface comprising solidification striations extending over the entire contour of the welded metal part and over at least a portion of the height of the peripheral edge surface.

30. The press formed welded metal component of claim 29, wherein said first metal component portion and said second metal component portion comprise a steel substrate.

31. The press formed weld metal component of claim 30, being a hot press formed metal component, the matrix of the first and/or second metal component portions having primarily a bainitic and/or martensitic microstructure.

32. The press formed welded metal part of claim 29 or 30, wherein said press formed welded metal part is a cold press formed metal part.

33. An apparatus (38) for producing a welded metal blank (16), comprising:

-a first cutting station (40), said first cutting station (40) being configured for cutting at least a first initial sheet metal (1) from a first metal strip (2) and a second initial sheet metal (3) from a second metal strip (4);

-a welding station (42), said welding station (42) being configured for joining at least said first initial metal sheet (1) and said second initial metal sheet (3) by welding to obtain a sheet having an initial profile (C)₀) The initial weld metal blank (9), the initial weld metal blank (9) comprising a weld joint (10) joining the first initial metal plate (1) and the second initial metal plate (3); and

-a second cutting station (44), said second cutting station (44) being configured for cutting said initial welded metal blank (9) using a cutting process involving metal melting to obtain at least one final profile (C)₁、C₂... -) comprising a first metal blank part (17) and a second metal blank part (18) joined by a weld joint portion (19), the weld joint portion (19) being constituted by a portion of the weld joint (10) obtained during the joining step.

34. An apparatus (50) for producing a press formed welded metal part, comprising:

-a plant (38) for producing welded metal blanks (16) according to claim 33;

-a press (52), the press (52) being configured for press forming the weld metal blank into a three-dimensional shape to obtain a press formed weld metal part (51); and

-optionally, a 3D laser cutting station (54), the 3D laser cutting station (54) being configured for trimming the edges of the press formed welded metal part (51) using 3D laser cutting to obtain a final press formed welded metal part (56).