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1.发明申请公开(公告)号：US20160221117A1
公开(公告)日：2016-08-04
申请号：US15025633
申请日：2014-09-29
发明人： Koichi TANIGUCHI , Muneo MATSUSHITA , Rinsei IKEDA
IPC分类号： B23K20/12
CPC分类号： B23K20/1235 , B23K20/1205 , B23K20/122 , B23K20/1225 , B23K20/227 , B23K2101/18 , B23K2103/04 , C21D1/42 , C21D9/50 , C21D9/505 , Y02P10/253
摘要： A friction stir welding method for welding steel sheets together includes a heating device disposed ahead of a rotating tool in an advancing direction that preheats an unwelded portion before the welding thereof by the rotating tool and at the time of preheating, the surface temperature distribution in a direction perpendicular to the advancing direction in a position at which the welding by the rotating tool is initiated is set such that given that TAc1 is the Ac1 point of a steel sheet, the maximum temperature (TU) thereof is 0.6×TAc1
摘要翻译： 用于将钢板焊接在一起的摩擦搅拌焊接方法包括在前进方向上设置在旋转工具的前方的加热装置，其在通过旋转工具进行焊接之前预热未焊接部分，并且在预热时，表面温度分布在 在旋转工具的焊接开始的位置处垂直于前进方向的方向被设定为使得当TAc1为钢板的Ac1点时，其最高温度（TU）为0.6×TAc1
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2.发明公开公开(公告)号：US20230339037A1
公开(公告)日：2023-10-26
申请号：US17908799
申请日：2021-03-01
发明人： Reiko ENDO , Muneo MATSUSHITA , Yasuaki OKITA , Hiroshi MATSUDA
IPC分类号： B23K11/11
CPC分类号： B23K11/115 , B23K2101/18
摘要： Provided are a resistance spot welding method and a method for manufacturing a resistance spot welded joint. At least one of the steel sheets used is a high strength steel sheet. The method includes a main current application step in which current is applied with a current Iw and a tempering post-heat treatment step. The tempering post-heat treatment step includes a cooling process and a heating process and can include at least one of a transition process and a holding process. In the heating process, a current is applied at a current value It, shown in formula (2), for a current application time tt.
0.8×Iw≤It≤1.6×Iw (2)-
3.发明申请公开(公告)号：US20200215644A1
公开(公告)日：2020-07-09
申请号：US16637906
申请日：2018-09-12
发明人： Muneo MATSUSHITA , Rinsei IKEDA
IPC分类号： B23K20/12
摘要： There is provided a friction stir welding method in which, when double-sided friction stir welding is performed, enough plastic flow to obtain a welded state uniform in the thickness direction of metal sheets can be obtained, in which an increase in welding speed is achieved while the occurrence of defects during welding is prevented, and in which sufficient strength and improvement in welding workability can be achieved. There is also provided a friction stir welding device suitable for the friction stir welding.
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公开(公告)号：US20180043466A1
公开(公告)日：2018-02-15
申请号：US15556792
申请日：2016-03-17
发明人： Muneo MATSUSHITA , Koichi TANIGUCHI , Rinsei IKEDA
IPC分类号： B23K20/12
CPC分类号： B23K20/1235 , B23K20/12 , B23K20/1225 , B23K20/1245
摘要： A friction stir welding apparatus that includes a rotary tool and a heating device. The heating device is placed in front of the rotary tool to heat steel sheets that are used as a workpiece. The rotary tool is moved in the welding direction so that steel sheet is softened by frictional heat. Additionally, the surface temperature, the area, and the position of the heated region during the heating process are strictly controlled. The heating of the steel sheets by the welding apparatus provides sufficient strength and good welding workability by advantageously eliminating plastic flow defects generated due to insufficient heating of workpieces.
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5.发明公开公开(公告)号：US20240359257A1
公开(公告)日：2024-10-31
申请号：US18686869
申请日：2022-07-27
发明人： Muneo MATSUSHITA , Shohei IWATA , Yasushi KITANI
IPC分类号： B23K20/12 , B23K101/36 , B23K103/04 , H01F1/147
CPC分类号： B23K20/129 , B23K20/122 , H01F1/147 , B23K2101/36 , B23K2103/04
摘要： An electrical steel strip welded joint is provided that is able to inhibit the occurrence of coil joint fracture on a production line caused by deterioration of mechanical properties and shape of the coil joint. The steel microstructures of the joined portion and the thermo-mechanically affected zone are mainly ferrite phase, and satisfy the relationships of the following Expressions (1) to (4).
Dsz
≤
200
μ
m
(
1
)
Dhaz
1
≤
Dbm
1
(
2
)
Dhaz
2
≤
Dbm
2
(
3
)
0.9
×
(
Hbm
1
+
Hbm
2
)
/
2
≤
Hsz
≤
1.2
×
(
Hbm
1
+
Hbm
2
)
/
2
(
4
)-
公开(公告)号：US20220371119A1
公开(公告)日：2022-11-24
申请号：US17764090
申请日：2020-09-18
发明人： Muneo MATSUSHITA , Shohei IWATA , Yasushi KITANI
IPC分类号： B23K20/12
摘要： A double-sided friction stir welding method, methods for producing a cold-rolled steel strip and a coated steel strip, a double-sided friction stir welding apparatus, and facilities for producing a cold-rolled steel strip and a coated steel strip. The double-sided friction stir welding method includes pressing two rotating tools, which are disposed on a first surface and a second surface of a butt portion or overlap portion of the steel strips, against the butt portion or overlap portion of steel strips and moving the rotating tools in the welding direction while rotating the rotating tools in opposite directions to each other, so that an unwelded portion of the steel strips is softened by frictional heat generated between the rotating tools and the unwelded portion of the steel strips, and the softened portion is stirred with the rotating tools to generate plastic flow so as to weld the steel strips together.
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公开(公告)号：US20220228233A1
公开(公告)日：2022-07-21
申请号：US17614424
申请日：2020-03-04
发明人： Reiko ENDO , Muneo MATSUSHITA , Hiroshi MATSUDA
摘要： This application relates to a resistance spot weld, a resistance spot welding method, a resistance spot welded joint, and a method for manufacturing the resistance spot welded joint. In the resistance spot weld, at least one of steel sheets is a high-strength steel sheet having a prescribed chemical composition. In at least one of a nugget edge region corresponding to a faying interface, the nugget edge region has a metal microstructure including tempered martensite as a main phase. The hardness Hv of the nugget edge region and the hardness Hmw of martensite in the nugget as a whole satisfy formula (4). In at least one of a strong HAZ region corresponding to the faying interface, the hardness Hh of the strong HAZ region and the hardness Hmh of martensite in a prescribed steel sheet satisfy formula (8). Hv ≤ Hmw - 40 ( 4 ) Hh
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公开(公告)号：US20200306871A1
公开(公告)日：2020-10-01
申请号：US16089217
申请日：2017-03-22
发明人： Muneo MATSUSHITA , Rinsei IKEDA , Koichi TANIGUCHI
摘要： An object is to provide a friction stir welding method and apparatus that provide sufficient strength and good welding workability by advantageously eliminating plastic flow deficiency generated as a result of insufficient heating of workpieces.In friction stir welding for steel sheets (3,3) as workpieces, a pair of facing rotary tools (1,15) are inserted into a non-welded part from both one surface side and the other surface side of the steel sheets (3,3), the rotary tools move in a welding direction while rotating, and in addition, a preheating process for heating steel sheets (3,3) is performed by heating means (5) provided in front of the rotary tools (1,15). The configuration of the pair of facing rotary tools (1,15) and the surface temperature, area, position, and so forth of a heated region in the preheating process are strictly controlled.
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