公开(公告)号：US10480554B2

公开(公告)日：2019-11-19

申请号：US16414857

申请日：2019-05-17

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: F16B5/08 ,  B23K9/23 ,  B23K33/00 ,  C23C2/26 ,  C23C28/02 ,  B23K26/32 ,  B23K103/08 ,  B23K101/18 ,  B23K101/34 ,  B23K103/04 ,  B23K103/10 ,  B23K103/00

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.

公开(公告)号：US10473130B2

公开(公告)日：2019-11-12

申请号：US16413901

申请日：2019-05-16

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: F16B5/08

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.

公开(公告)号：US10352342B2

公开(公告)日：2019-07-16

申请号：US15585575

申请日：2017-05-03

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: F16B5/08 ,  B23K9/23 ,  B23K33/00 ,  B32B15/01 ,  C23C2/26 ,  C23C28/02 ,  B23K26/32 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C21D1/00 ,  C21D6/00 ,  C21D9/50 ,  C22C38/08 ,  B23K101/18 ,  B23K101/34 ,  B23K103/04 ,  B23K103/10 ,  B23K103/00 ,  B23K103/08

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.

公开(公告)号：US09682443B2

公开(公告)日：2017-06-20

申请号：US14070132

申请日：2013-11-01

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: B32B15/01 ,  B23K37/00 ,  B23K1/14 ,  B23K26/24 ,  B23K9/00 ,  C23C10/22 ,  B23K26/362 ,  B23K9/23 ,  B23K33/00 ,  C23C2/26 ,  C23C28/02 ,  B23K26/32 ,  B23K26/322 ,  B23K26/40 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  B23K26/21 ,  B23K31/02 ,  C23C2/04 ,  B23K9/02 ,  B23K26/36 ,  C21D1/00 ,  C21D6/00 ,  C21D9/50 ,  B23K101/18 ,  B23K103/04 ,  B23K103/10 ,  B23K101/34 ,  B23K103/00

CPC classification number: B23K33/00 ,  B23K1/14 ,  B23K9/0026 ,  B23K9/02 ,  B23K9/025 ,  B23K9/23 ,  B23K10/02 ,  B23K26/21 ,  B23K26/24 ,  B23K26/26 ,  B23K26/32 ,  B23K26/322 ,  B23K26/36 ,  B23K26/362 ,  B23K26/40 ,  B23K31/02 ,  B23K37/003 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B23K2103/08 ,  B23K2103/10 ,  B23K2103/50 ,  B32B15/012 ,  C21D1/00 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/50 ,  C21D2211/008 ,  C22C21/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  C23C2/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C10/22 ,  C23C28/021 ,  F16B5/08 ,  Y10T428/12229 ,  Y10T428/12271 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12486 ,  Y10T428/12493 ,  Y10T428/12757 ,  Y10T428/12764 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A plate is provided. The plate includes a steel substrate and a precoat having a layer of intermetallic alloy in contact with the substrate, topped by a layer of aluminum alloy. On at least one precoated face of the plate, an area situated at the periphery of the plate has the aluminum alloy layer removed. A part and a welded blank are also provided. Methods are also provided.

公开(公告)号：US09669490B2

公开(公告)日：2017-06-06

申请号：US14865721

申请日：2015-09-25

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: B23K26/36 ,  B23K26/40 ,  B23K26/362 ,  B23K9/23 ,  B23K33/00 ,  B32B15/01 ,  C23C2/26 ,  C23C28/02 ,  B23K1/14 ,  B23K9/00 ,  B23K26/24 ,  B23K37/00 ,  C23C10/22 ,  B23K26/32 ,  B23K26/322 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  B23K26/21 ,  B23K31/02 ,  C23C2/04 ,  B23K9/02 ,  C21D1/00 ,  C21D6/00 ,  C21D9/50 ,  B23K101/18 ,  B23K103/04 ,  B23K103/10 ,  B23K101/34 ,  B23K103/00

CPC classification number: B23K33/00 ,  B23K1/14 ,  B23K9/0026 ,  B23K9/02 ,  B23K9/025 ,  B23K9/23 ,  B23K10/02 ,  B23K26/21 ,  B23K26/24 ,  B23K26/26 ,  B23K26/32 ,  B23K26/322 ,  B23K26/36 ,  B23K26/362 ,  B23K26/40 ,  B23K31/02 ,  B23K37/003 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B23K2103/08 ,  B23K2103/10 ,  B23K2103/50 ,  B32B15/012 ,  C21D1/00 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/50 ,  C21D2211/008 ,  C22C21/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  C23C2/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C10/22 ,  C23C28/021 ,  F16B5/08 ,  Y10T428/12229 ,  Y10T428/12271 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12486 ,  Y10T428/12493 ,  Y10T428/12757 ,  Y10T428/12764 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A method of fabricating a precoated steel plate, the method including coating a steel plate by dipping the steel plate in a molten bath to obtain a precoat upon the steel plate, wherein the precoat includes an intermetallic alloy layer and a metal alloy layer. The intermetallic alloy layer is topped by the metal alloy layer. On at least one face of the plate, the metal alloy layer is removed in an area at a periphery of the plate using a laser beam, while leaving at least part of the intermetallic alloy layer in the area. The at least part of the intermetallic layer in the area has a thickness between 3 and 10 micrometers thick.

公开(公告)号：US11154950B2

公开(公告)日：2021-10-26

申请号：US16828672

申请日：2020-03-24

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: B23K26/32 ,  B23K9/23 ,  B23K33/00 ,  C23C2/26 ,  C23C28/02 ,  F16B5/08 ,  B32B15/01 ,  C21D1/00 ,  C21D6/00 ,  C21D9/50 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  B23K103/08 ,  B23K103/10 ,  B23K103/00 ,  B23K101/18 ,  B23K103/04 ,  B23K101/34

Abstract: A method for creating a welded steel part includes providing 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; providing 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; butt welding the first and second steel plates at a weld so as to melt material from at least the first base, the first intermetallic alloy layer, the second base and the second intermetallic layer to form a molten weld material; austenizing the welded steel plates at a temperature between Ac1 and Ac3+100 degrees C. for a time greater than or equal to 20 seconds; and cooling the welded steel plates so as to render a uniform microstructure to the weld.

公开(公告)号：US09375809B2

公开(公告)日：2016-06-28

申请号：US14865747

申请日：2015-09-25

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: B23K26/32 ,  B23K9/00 ,  B23K9/02 ,  B23K26/36 ,  B23K9/23 ,  B23K33/00 ,  B32B15/01 ,  C23C2/26 ,  C23C28/02 ,  B23K1/14 ,  B23K26/24 ,  B23K37/00 ,  C23C10/22 ,  B23K26/40 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  B23K31/02 ,  C23C2/04 ,  C21D1/00 ,  C21D6/00 ,  C21D9/50

CPC classification number: B23K33/00 ,  B23K1/14 ,  B23K9/0026 ,  B23K9/02 ,  B23K9/025 ,  B23K9/23 ,  B23K10/02 ,  B23K26/21 ,  B23K26/24 ,  B23K26/26 ,  B23K26/32 ,  B23K26/322 ,  B23K26/36 ,  B23K26/362 ,  B23K26/40 ,  B23K31/02 ,  B23K37/003 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B23K2103/08 ,  B23K2103/10 ,  B23K2103/50 ,  B32B15/012 ,  C21D1/00 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/50 ,  C21D2211/008 ,  C22C21/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  C23C2/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C10/22 ,  C23C28/021 ,  F16B5/08 ,  Y10T428/12229 ,  Y10T428/12271 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12486 ,  Y10T428/12493 ,  Y10T428/12757 ,  Y10T428/12764 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A method of butt-welding steel plates is provided. The method includes the steps of coating a first steel plate by dipping the first steel plate in a molten bath to obtain a first precoat upon the first steel plate. The first precoat includes a first intermetallic alloy layer and a first metal alloy layer, the first intermetallic alloy layer is topped by the first metal alloy layer. On a first face of the first steel plate, the first metal alloy layer is removed in a first area at a first periphery of the first steel plate, while at least part of the first intermetallic alloy layer in the first area remains. A second steel plate is coated by dipping the second steel plate in the molten bath or a further molten bath to obtain a second precoat upon the second steel plate. The second precoat includes a second intermetallic alloy layer and a second metal alloy layer, the second intermetallic alloy layer is topped by the second metal alloy layer. On a second face of the second steel plate, the second metal alloy layer is removed in a second area at a second periphery of the second metal plate. While at least part of the second intermetallic alloy layer in the second area remains. After removal of the first and second metal alloy layers, the first periphery of the first steel plate is butt-welded to the second periphery of the second steel plate to form a welded blank.

Abstract translation: 提供了对接钢板的方法。 该方法包括以下步骤：通过将第一钢板浸入熔融浴中来涂覆第一钢板，以在第一钢板上获得第一预涂层。 第一预涂层包括第一金属间合金层和第一金属合金层，第一金属间合金层由第一金属合金层顶起。 在第一钢板的第一面上，在第一钢板的第一周边的第一区域中除去第一金属合金层，而第一区域中的第一金属间合金层的至少一部分残留。 通过将第二钢板浸入熔池或另外的熔池中来涂覆第二钢板，以在第二钢板上获得第二预涂层。 第二预涂层包括第二金属间合金层和第二金属合金层，第二金属间合金层由第二金属合金层顶起。 在第二钢板的第二面上，在第二金属板的第二周边的第二区域中除去第二金属合金层。 而第二区域的第二金属间合金层的至少一部分仍然存在。 在去除第一和第二金属合金层之后，第一钢板的第一周边对接焊到第二钢板的第二周边，以形成焊接坯料。

公开(公告)号：US20140057128A1

公开(公告)日：2014-02-27

申请号：US14070132

申请日：2013-11-01

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: B32B15/01 ,  B23K37/00 ,  C23C10/22 ,  B23K1/14 ,  B23K26/24 ,  B23K9/00

CPC classification number: B23K33/00 ,  B23K1/14 ,  B23K9/0026 ,  B23K9/02 ,  B23K9/025 ,  B23K9/23 ,  B23K10/02 ,  B23K26/21 ,  B23K26/24 ,  B23K26/26 ,  B23K26/32 ,  B23K26/322 ,  B23K26/36 ,  B23K26/362 ,  B23K26/40 ,  B23K31/02 ,  B23K37/003 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B23K2103/08 ,  B23K2103/10 ,  B23K2103/50 ,  B32B15/012 ,  C21D1/00 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/50 ,  C21D2211/008 ,  C22C21/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  C23C2/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C10/22 ,  C23C28/021 ,  F16B5/08 ,  Y10T428/12229 ,  Y10T428/12271 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12486 ,  Y10T428/12493 ,  Y10T428/12757 ,  Y10T428/12764 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A plate is provided. The plate includes a steel substrate and a precoat having a layer of intermetallic alloy in contact with the substrate, topped by a layer of aluminum alloy. On at least one precoated face of the plate, an area situated at the periphery of the plate has the aluminum alloy layer removed. A part and a welded blank are also provided. Methods are also provided.

Abstract translation: 提供板材。 板包括钢基材和预涂层，其具有与基底接触的金属间合金层，顶层由铝合金层组成。 在板的至少一个预涂面上，位于板周边的区域除去了铝合金层。 还提供了零件和焊接坯料。 还提供了方法。

公开(公告)号：US09676061B2

公开(公告)日：2017-06-13

申请号：US14858487

申请日：2015-09-18

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: B23K26/36 ,  B23K26/40 ,  B23K26/362 ,  B23K9/23 ,  B23K33/00 ,  B32B15/01 ,  C23C2/26 ,  C23C28/02 ,  B23K1/14 ,  B23K9/00 ,  B23K26/24 ,  B23K37/00 ,  C23C10/22 ,  B23K26/32 ,  B23K26/322 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  B23K26/21 ,  B23K31/02 ,  C23C2/04 ,  B23K9/02 ,  C21D1/00 ,  C21D6/00 ,  C21D9/50 ,  B23K101/18 ,  B23K103/04 ,  B23K103/10 ,  B23K101/34 ,  B23K103/00

CPC classification number: B23K33/00 ,  B23K1/14 ,  B23K9/0026 ,  B23K9/02 ,  B23K9/025 ,  B23K9/23 ,  B23K10/02 ,  B23K26/21 ,  B23K26/24 ,  B23K26/26 ,  B23K26/32 ,  B23K26/322 ,  B23K26/36 ,  B23K26/362 ,  B23K26/40 ,  B23K31/02 ,  B23K37/003 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B23K2103/08 ,  B23K2103/10 ,  B23K2103/50 ,  B32B15/012 ,  C21D1/00 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/50 ,  C21D2211/008 ,  C22C21/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  C23C2/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C10/22 ,  C23C28/021 ,  F16B5/08 ,  Y10T428/12229 ,  Y10T428/12271 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12486 ,  Y10T428/12493 ,  Y10T428/12757 ,  Y10T428/12764 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A method of fabricating a precoated steel plate is provided. The method includes coating a steel plate by dipping the steel plate in a molten bath to obtain a precoat upon the steel plate. The precoat consists of an intermetallic alloy layer and a metal alloy layer, the intermetallic alloy layer is topped by the metal alloy layer. On at least one face of the plate, the metal alloy layer is removed in an area at a periphery of the plate using a laser beam, while at least part of the intermetallic alloy layer is left in the area. The step of removing includes measuring a characteristic of the laser or an area where the metal alloy area is to be removed to obtain a measured value, comparing the measured value with a reference value and stopping a removal operation to leave the at least part of the intermetallic alloy in place as function of the comparing step. Additional methods are also provided.

公开(公告)号：US09669491B2

公开(公告)日：2017-06-06

申请号：US14865793

申请日：2015-09-25

Applicant: ArcelorMittal France

Inventor： Jean-Francois Canourgues ,  Aurelien Pic ,  Pascal Verrier ,  Rene Vierstraete ,  Wolfram Ehling ,  Bernd Thommes

IPC: B23K11/00 ,  B23K26/36 ,  B23K26/40 ,  B23K26/362 ,  B23K9/23 ,  B23K33/00 ,  B32B15/01 ,  C23C2/26 ,  C23C28/02 ,  B23K1/14 ,  B23K9/00 ,  B23K26/24 ,  B23K37/00 ,  C23C10/22 ,  B23K26/32 ,  B23K26/322 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  C23C2/12 ,  B23K26/21 ,  B23K31/02 ,  C23C2/04 ,  B23K9/02 ,  C21D1/00 ,  C21D6/00 ,  C21D9/50 ,  B23K101/18 ,  B23K103/04 ,  B23K103/10 ,  B23K101/34 ,  B23K103/00

CPC classification number: B23K33/00 ,  B23K1/14 ,  B23K9/0026 ,  B23K9/02 ,  B23K9/025 ,  B23K9/23 ,  B23K10/02 ,  B23K26/21 ,  B23K26/24 ,  B23K26/26 ,  B23K26/32 ,  B23K26/322 ,  B23K26/36 ,  B23K26/362 ,  B23K26/40 ,  B23K31/02 ,  B23K37/003 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B23K2103/08 ,  B23K2103/10 ,  B23K2103/50 ,  B32B15/012 ,  C21D1/00 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/50 ,  C21D2211/008 ,  C22C21/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/28 ,  C22C38/32 ,  C23C2/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C10/22 ,  C23C28/021 ,  F16B5/08 ,  Y10T428/12229 ,  Y10T428/12271 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12486 ,  Y10T428/12493 ,  Y10T428/12757 ,  Y10T428/12764 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A method of forming a steel part is provided. The method includes the steps of coating a first steel plate to obtain a first precoat upon the first steel plate so as to define a first base, a first intermetallic alloy layer on the first base and a first metal alloy layer on the first intermetallic alloy layer. On a first face of the first steel plate the first metal alloy layer is removed in a first area of the first steel plate, while at least part of the first intermetallic alloy layer in the first area remains. A second steel plate is coated to obtain a second precoat upon the second steel plate so as to define a second base, a second intermetallic alloy layer on the second base and a second metal alloy layer on the second intermetallic alloy layer. On a second face of the second steel plate, the second metal alloy layer is removed in a second area of the second metal plate, while at least part of the second intermetallic alloy layer in the second area remains. After removal of the first and second metal alloy layers, the first steel plate is butt-welded to the second steel plate at the first and second areas to form a welded blank. A heat treatment is performed on the welded blank. The welded blank is shaped after the heat treatment into the steel part. A steel part is also provided.