# US 2014/0154521 A1 · Tailor welded blank, manufacturing method thereof, and hot stamped component using tailor welded blank

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0154521 A1
- Document ID: US20140154521A1
- Status: Published application
- Kind: A1
- Application number: 13/903,682
- Filed: 2013-05-28
- Published: 2014-06-05
- Earliest claimed: 2012-12-03
- Assignees: Pusan National University Industry-University Cooperation Foundation; Hyundai Hysco
- Applicants: Pusan National University Industry-University Cooperation Foundation; Hyundai Hysco
- Inventors: Min-Suck Kwon; Yun-Gyu Kim; Young-Jin Kim; Chung-Yun Kang; Jong-Pan Kong; Myeong-Hwan Oh; Hyeon-Jeong Shin; Seung-Taik Oh
- Web page: https://patentgrep.com/patent/US20140154521A1

## CPC

- B32B 15/01: all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)}
- B23K 26/211: with interposition of special material to facilitate connection of the parts
- B23K 26/24: Seam welding
- B23K 26/32: taking account of the properties of the material involved
- B23K 26/322: involving coated metal parts (using absorbing layers on the workpiece B23K26/18)
- B32B 7/04: Interconnection of layers
- B32B 15/011: {all layers being formed of iron alloys or steels}
- B32B 15/013: {one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium}
- B23K 2101/185: {Tailored blanks}
- B23K 2101/34: Coated articles {; Surface treated articles}
- B23K 2103/08: Non-ferrous metals or alloys
- B23K 2103/50: {Inorganic materials other than metals or composite materials}
- Y10T 428/12229: Intermediate article [e.g., blank, etc.]
- Y10T 428/12396: Discontinuous surface component
- Y10T 428/12757: Fe
- Y10T 428/12799: Next to Fe-base component [e.g., galvanized]
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Disclosed are a tailor welded blank and a manufacturing method thereof. The tailor welded blank is manufactured by connecting blank elements of different materials or thicknesses, thereby eliminating quality problems in a welded zone. A hot stamped component is manufactured by hot stamping the tailor welded blank formed by laser-welding blank elements made of coated steel plates having different strengths or thicknesses using a filler wire, wherein a laser-welded zone has a martensite structure.

## Claims

### Claim 1

A method of manufacturing a tailor welded blank, comprising: laser-welding blank elements made of coated steel plates having different strengths or thicknesses using a filler wire.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the filler wire has a composition system in which a welded zone does not generate a ferrite structure at temperatures ranging from 800° C. to 950° C., by taking intrusion of a composition of coating layers of the coated steel plates into the welded zone into account.

### Claim 3 (depends on 1)

The method according to claim 1, wherein each of the coated steel plates comprises an Al—Si coating layer, and the filler wire has a higher amount of an austenite-stabilizing element than a composition of a base material of each of the coated steel plates.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the austenite-stabilizing element comprises C or Mn.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the C content of the filler wire is 0.1 wt % to 0.8 wt % higher than that of the base material of the coated steel plate.

### Claim 6 (depends on 4)

The method according to claim 4, wherein the Mn content of the filler wire is 1.5 wt % to 7.0 wt % higher than that of the base material of the coated steel plate.

### Claim 7

A tailor welded blank manufactured by laser-welding blank elements made of coated steel plates having different strengths or thicknesses using a filler wire, wherein a laser-welded zone has a composition providing an austenite structure at temperatures ranging from 800° C. to 950° C.

### Claim 8 (depends on 7)

The tailor welded blank according to claim 7, wherein the welded zone has a composition in which a base material and a coating layer of each of the coated steel plates are mixed with the filler wire.

### Claim 9

A hot stamped component manufactured by hot stamping a tailor welded blank formed by laser-welding blank elements made of coated steel plates having different strengths or thicknesses using a filler wire, wherein a laser-welded zone has a martensite structure.

### Claim 10 (depends on 9)

The hot stamped component according to claim 9, wherein each of the blank elements includes a boron steel plate having hardenability as a base material, and an Al—Si or Zn coating layer.

### Claim 11 (depends on 10)

The hot stamped component according to claim 10, wherein the filler wire has a higher amount of an austenite-stabilizing element than the base material of the coated steel plate.

### Claim 12 (depends on 11)

The hot stamped component according to claim 11, wherein the austenite-stabilizing element comprises C or Mn.