Patent · US Active

Method for laser welding one or more workpieces of hardenable steel in a butt joint

US9623515B2 · kind B2 · utility

17Cited by

1References

9Claims

0Family size

Assignee

WISCO Tailored Blanks GmbH · DE

Inventors

Arndt Breuer · Duisburg, DE
Max Brandt · Duisburg, DE
Dietmar Schaftinger · Rheinberg, DE

Key dates

Filing date	Aug 2, 2013
Grant date	Apr 18, 2017
Priority date	—
Expiry date	Dec 28, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2103/50
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method for laser welding of one or more workpieces made from press hardenable steel, in a butt joint, in which the workpiece or the workpieces have a thickness of at least 1.8 mm and/or a jump in thickness of at least 0.4 mm arises at the butt joint including supplying filler wire into a molten bath generated by a laser beam. In order to ensure that the weld seam can reliably harden into a martensitic structure during the hot forming (press hardening), the filler wire contains at least one alloy element from the group of manganese, chromium, molybdenum, silicon and nickel, wherein the at least one alloy element is present in the filler wire with a mass proportion that is larger by 0.1% by weight than the mass proportion of the element in the press hardenable steel of the workpiece or the workpieces.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.