US 10,473,130 B2 · Steel part

Abstract

A formed steel part includes a first steel plate having a first base, a first intermetallic alloy layer on the first base and a first metal alloy layer on the first intermetallic alloy layer, the first steel part having a first area without the first metal alloy layer and having at least part of the first intermetallic alloy layer; and a second steel plate having a second base, a second intermetallic alloy layer on the second base and a second metal alloy layer on the second intermetallic alloy layer, the second steel part having a second area without the second metal alloy layer and having at least part of the second intermetallic alloy layer in the second area. The first and second steel plates are joined together. The formed steel part may also include a butt-weld joining the first and second steel plates.

Claims16

Dependent claims

A heat-treated part comprising:

a first steel plate having a first base, a first intermetallic alloy layer on the first base and a first metal alloy layer on the first intermetallic alloy layer;
and
a second steel plate having a second base, a second intermetallic alloy layer on the second base and a second metal alloy layer on the second intermetallic alloy layer;
the first and second steel plates being butt-welded together at a weld, the weld including material from at least the first base, the first intermetallic alloy layer, the second base and the second intermetallic layer, the weld forming a heat-treated welded joint with a tensile strength in excess of 1450 MPa.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

16/413,901Filed 16 May 2019 · continuation

Priority

WO PCT/FR2006/00089819 Apr 2006

Published

US 2019/0271341 A15 Sep 2019

Granted

12 Nov 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification51 codes

B23K 26/32
Bonding: taking account of the properties of the material involved
B23K 9/23
Arc welding or cutting: taking account of the properties of the materials to be welded
B23K 33/00
Soldering or unsoldering: specially-profiled edge portions of workpieces for making soldering or
B32B 15/012
All layers being exclusively metallic: one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy

Family

PCT/FR2007/000536Parent of this continuation · filed 29 Mar 2007

Application12/293,898Parent of this continuation · filed 25 Nov 2008

Application13/311,731Parent of this continuation · filed 6 Dec 2011

Application14/070,132Parent of this continuation · filed 1 Nov 2013

US 8,614,008 B2Parent of this continuation · filed 24 Dec 2013

Application14/865,793Parent of this division · filed 25 Sep 2015

US 9,597,750 B2Parent of this continuation · filed 21 Mar 2017

Application15/585,575Parent of this continuation · filed 3 May 2017

US 9,669,491 B2Parent of this division · filed 6 Jun 2017

US 9,682,443 B2Parent of this continuation · filed 20 Jun 2017

US 2019/0271341 A1Pre-grant publication · published 5 Sep 2019

Application15/585,575Parent of this division

Application14/865,793Parent of this continuation

US 10,352,342 B2Related patent

US 2009/0220815 A1Published application

US 2012/0074106 A1Published application

US 2014/0057128 A1Published application

US 2016/0010174 A1Published application

US 2017/0232560 A1Published application

US 10,473,130 B2This patent

From the US filing history. Foreign family members aren’t listed.

Steel part

Life of this patent

Steel part

Life of this patent

Abstract

Claims16