Method for the production of tailor welded blanks (TWBs)

Patent metadata

Field	Value
Publication number	US-11745246-B2
Application number	US-201816128709-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Sep 19, 2017
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

Method for producing a component system having a first component with a first component portion and a second component with a second component portion, including the following steps: connecting, in particular welding or soldering, the first component portion, which consists of an aluminum alloy, to the second component portion, which in particular consists of a naturally aged aluminum alloy, a copper alloy or an iron alloy, in particular a steel alloy, so as to form a connection seam; artificially aging the connection seam such that the yield strength of the connection seam is above the yield strength of the first component portion and/or of the second component portion; and deforming, in particular deep-drawing and/or stretch-drawing, the component system.

First claim

What is claimed is:

1. Method for producing a component system comprising a first component having a first component portion and a second component having a second component portion, comprising the following steps:
a. connecting the first component portion, which consists of a naturally aged aluminum alloy, to the second component portion, which consists of one of an aluminum alloy, a copper alloy, an iron alloy, or a steel alloy, so as to form a connection seam, wherein the connection occurs at a speed of no less than 100 mm/min;
b. within 10 minutes of forming the connection seam in step (a), artificially aging the connection seam for at least ten minutes such that the yield strength of the connection seam is above the yield strength of at least one of the first component portion and the second component portion; and
c. deforming the component system.

2. Method according to claim 1 , wherein in step a. there is a critical cooling speed and a critical cooling duration and a cooling speed and/or a cooling duration is at least within the temperature range between 400° C. and 200° C., higher than the critical cooling speed or shorter than the critical cooling duration, respectively, of at least one of the aluminum alloy of the first component portion and the second component portion.

3. Method according to claim 1 , wherein in step a. the period of time in which the temperature of a connection seam portion exceeds 250° C. during the connection process is less than 200 seconds.

4. Method according to claim 1 , wherein the aging temperature in step b. is 60° C. to 220° C.

5. Method according to claim 1 , wherein at least one of the first component portion and the second component portion can have a temperature between −30° C. and 200° C. in step a.

6. Method according to claim 1 , wherein in step b. only the connection seam is artificially aged.

7. Method according to claim 1 , wherein in step b. the components portions of the two components adjacent to the connection seam are cooled.

8. Method according to claim 1 , comprising the further step of:
d. artificially aging the component system, wherein this step takes place by means of a process of stoving into the component system.

9. Method according to claim 1 , wherein in step a. the connection seam is cooled in one of downstream or upstream of the seam or laterally.

10. Method according to claim 8 , wherein in step d. the aging temperature and/or the aging duration is greater than the aging temperature or aging duration in step b.

11. Method according to claim 1 , wherein at least one of the first component and the second component is a semi-finished product.

12. Method according to claim 1 , wherein at least one of the first component portion and the second component portion consists of an AlSiMg, AlCu or AlZn alloy.

Assignees

• Univ Stuttgart

Inventors

• Werz Martin
• Weihe Stefan
• Ehemann Lisa

Classifications

• B21D35/006 Primary

  Blanks having varying thickness, e.g. tailored blanks · CPC title

• B23K1/19

  taking account of the properties of the materials to be soldered · CPC title

• B23K9/0026

  specially adapted for particular articles or work · CPC title

• B23K9/035

  with backing means disposed under the seam · CPC title

• B23K9/23

  taking account of the properties of the materials to be welded · CPC title