EP0923145A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Joined structure of dissimilar metallic materials
Assignee: Toshiba Corp
•
Filing: 1998-11-19
•
Granted: —
•
Expires: 2018-11-19
Abstract
Abstract The present invention relates generally to a joined structure of dissimilar metallic materials having different characteristics. More specifically, the invention relates to a joined structure of a current-carrying contact or arching contact which are used for, e.g., a power breaker, or a coating end structure of a metal base and a coating material for improving conductivity and heat resistance. It is therefore an object of the present invention to provide a joined structure which enhances the impact strength of a joined member and which has a high reliability, in the joining of dissimilar metallic materials having different material characteristics. It is another object of the present invention to improve the impact strength of a coating member, which comprises a metal base and a coating material having a different material characteristic from that of the metal base, to provide a coating structure having a high reliability. According to one aspect of the present invention, there is provided a joined structure of dissimilar metallic materials, one of which is joined to the other metallic material having a smaller rigidity than that of the one of metallic materials, wherein an angle of the one of metallic materials to a free edge of the one of metallic materials at an end portion of a joined surface between the metallic materials is greater than or equal to 120 degrees or in the range of from 55 degrees to 85 degrees. According to another aspect of the present invention, there is provided a joined structure of dissimilar metallic materials, which comprises a contact portion of a current-carrying contact for use in a power breaker, the contact portion being made of copper or a copper alloy, and a remaining portion of the current-carrying contact other than the contact portion, the remaining portion being made of aluminum or an aluminum alloy, and wherein an angle of the contact portion of copper or the copper alloy to a free edge of the contact portion at an end portion of a joined surface between the contact portion and the remaining portion is greater than or equal to 120 degrees or in the range of from 55 degrees to 85 degrees. According to a further aspect of the present invention, there is provided a coating end structure comprising: a recessed metal base; and a coating member of a coating material which has a greater rigidity than that of the metal base and which is coated on the metal base, wherein an angle of the metal base to a free edge at the coating end portion is smaller than or equal to 60 degrees or in the range of from 95 degrees to 125 degrees.
Inventors
- 👤 Takahiko Shindo
- 👤 Yoshiyasu Itoh
- 👤 Katsumi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 09:57
CPC Classifications
B; B23; B23K; B23K31/00; B23K31/02; B23K20/00; B23K20/22; B23K20/233; B23K20/2336; B23K20/24; B23K33/00; H; H01; H01R; H01R4/00; H01R4/58; H01R4/62; B23K2101/00; B23K2103/00; B23K2103/18; H01H; H01H11/00; H01H11/04; H01H11/041; H01H11/042; H01H11/043; H01H11/045; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12451; Y10T428/12486; Y10T428/12493; Y10T428/12736; Y10T428/12743; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12826; Y10T428/12833; Y10T428/1284; Y10T428/12861; Y10T428/12903
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
79 words
A joined structure of dissimilar metallic materials, one of which is
joined to the other metallic material having a smaller rigidity than that of
said one of metallic materials, wherein an angle of said one of metallic
materials to a free edge of said one of metallic materials at an end portion
of a joined surface between said metallic materials is greater than or equal
to 120 degrees or in the range of from 55 degrees to 85 degrees.
Claim 2
Dependent Claim
50 words
A joined structure of dissimilar metallic materials as set forth in
claim 1, wherein said metallic materials having different rigidities are
joined by joining means which uses any one of friction welding, cold
welding, hot welding, diffusion joining, explosion welding, forge welding,
ultrasonic joining, brazing, soldering, resistance welding and adhesive.
Claim 3
Dependent Claim
48 words
A joined structure of dissimilar metallic materials as set forth in
claim 1, wherein said one of metallic materials is copper or a copper alloy,
and said other metallic material having a smaller rigidity than that of said
one of metallic materials is aluminum or an aluminum alloy.
Claim 4
Dependent Claim
48 words
A joined structure of dissimilar metallic materials as set forth in
claim 1, wherein said one of metallic materials is titanium or a titanium
alloy, and said other metallic material having a smaller rigidity than that
of said one of metallic materials is aluminum or an aluminum alloy.
Claim 5
Dependent Claim
44 words
A joined structure of dissimilar metallic materials as set forth in
claim 1, wherein said one of metallic materials is steel, and said other
metallic material having a smaller rigidity than that of said one of metallic
materials is aluminum or an aluminum alloy.
Claim 6
Dependent Claim
44 words
A joined structure of dissimilar metallic materials as set forth in
claim 1, wherein said one of metallic materials is steel, and said other
metallic material having a smaller rigidity than that of said one of metallic
materials is copper or a copper alloy.
Claim 7
Dependent Claim
114 words
A joined structure of dissimilar metallic materials, which
comprises a contact portion of a current-carrying contact for use in a
power breaker, said contact portion being made of copper or a copper
alloy, and a remaining portion of the current-carrying contact other than
said contact portion, said remaining portion being made of aluminum or
an aluminum alloy, and wherein an angle of said contact portion of
copper or the copper alloy to a free edge of said contact portion at an end
portion of a joined surface between said contact portion and said
remaining portion is greater than or equal to 120 degrees or in the range
of from 55 degrees to 85 degrees.
Claim 8
Dependent Claim
120 words
A joined structure of dissimilar metallic materials, which
comprises a contact portion of an arcing contact for use in a power
breaker, said contact portion being made of a copper-tungsten alloy, and
a remaining portion of the arcing contact other than said contact portion,
said remaining portion being made of a material selected from the group
consisting of iron, an iron alloy and a copper alloy, and wherein an angle
of said contact portion of copper-tungsten alloy to a free edge of said
contact portion at an end portion of a joined surface between said contact
portion and said remaining portion is greater than or equal to 120 degrees
or in the range of from 55 degrees to 85 degrees.
Claim 9
Dependent Claim
30 words
A joined structure of dissimilar metallic materials as set forth in
claim 7 or 8, wherein said joined surface between said dissimilar metallic
materials is apart from said contact portion.
Claim 10
Dependent Claim
30 words
A joined structure of dissimilar metallic materials as set forth in
claim 7 or 8, wherein a joined portion has the same electrical resistance
as that of a base metal.
Claim 11
Dependent Claim
70 words
A joined structure of dissimilar metallic materials, one of which is
joined to the other metallic material having a smaller rigidity than that of
said one of metallic materials, wherein when both of angles of said one of
metallic materials and said other metallic material to free edges of the
respective metallic materials at an end portion of a joined surface between
said metallic materials are smaller than 90 degrees.
Claim 12
Dependent Claim
106 words
A joined structure of dissimilar metallic materials, one of which is
joined to the other metallic material having a smaller rigidity than that of
said one of metallic materials, wherein when one of angles of said one of
metallic materials and said other metallic material to free edges of the
respective metallic materials at an end portion of a joined surface between
said metallic materials is 90 degrees, the other of the angles of said one of
metallic materials and said other metallic material to the free edges of the
respective metallic materials at the end portion of the joined surface is
smaller than 90 degrees.
Claim 13
Dependent Claim
57 words
A joined structure of dissimilar metallic materials as set forth in
claim 11 or 12, wherein said metallic materials having different rigidities
are joined by joining means which uses any one of friction welding, cold
welding, hot welding, diffusion joining, explosion welding, forge welding,
ultrasonic joining, brazing, soldering, resistance welding, molten metal
injection, cast joint and adhesive.
Claim 14
Dependent Claim
50 words
A joined structure of dissimilar metallic materials as set forth in
claim 11 or 12, wherein said one of metallic materials is copper or a
copper alloy, and said other metallic material having a smaller rigidity
than that of said one of metallic materials is aluminum or an aluminum
alloy.
Claim 15
Dependent Claim
50 words
A joined structure of dissimilar metallic materials as set forth in
claim 11 or 12, wherein said one of metallic materials is titanium or a
titanium alloy, and said other metallic material having a smaller rigidity
than that of said one of metallic materials is aluminum or an aluminum
alloy.
Claim 16
Dependent Claim
46 words
A joined structure of dissimilar metallic materials as set forth in
claim 11 or 12, wherein said one of metallic materials is steel, and said
other metallic material having a smaller rigidity than that of said one of
metallic materials is aluminum or an aluminum alloy.
Claim 17
Dependent Claim
46 words
A joined structure of dissimilar metallic materials as set forth in
claim 11 or 12, wherein said one of metallic materials is steel, and said
other metallic material having a smaller rigidity than that of said one of
metallic materials is copper or a copper alloy.
Claim 18
Dependent Claim
58 words
A joined structure of dissimilar metallic materials as set forth in
claim 11 or 12, wherein a contact portion of a current-carrying contact for
use in a power breaker is made of copper or a copper alloy, and a
remaining portion of the current-carrying contact other than said contact
portion is made of aluminum or an aluminum alloy.
Claim 19
Dependent Claim
67 words
A joined structure of dissimilar metallic materials as set forth in
claim 11 or 12, wherein a contact portion of an arcing contact for use in a
power breaker is made of a copper-tungsten alloy, and a remaining
portion of the arcing contact other than said contact portion is made of a
material selected from the group consisting of iron, an iron alloy and a
copper alloy.
Claim 20
Dependent Claim
30 words
A joined structure of dissimilar metallic materials as set forth in
claim 18 or 19, wherein said joined surface between said dissimilar
metallic materials is apart from said contact portion.
Claim 21
Dependent Claim
30 words
A joined structure of dissimilar metallic materials as set forth in
claim 18 or 19, wherein a joined portion has the same electrical resistance
as that of a base metal.
Claim 22
Dependent Claim
79 words
A joined structure of dissimilar metallic materials, one of which is
made of aluminum or an aluminum alloy and the other of which is made
of copper or a copper alloy, said metallic materials being joined by the
friction welding, wherein an angle of the other metallic material to a free
edge of the other metallic material at an end portion of a joined surface is
set to be in the range of from 50 degrees to 85 degrees.
Claim 23
Dependent Claim
76 words
A joined structure of dissimilar metallic materials, one of which is
made of aluminum or an aluminum alloy and the other of which is made
of copper or a copper alloy, said metallic materials being joined by the
friction welding, wherein an angle of the other metallic material to a free
edge of the other metallic material at an end portion of a joined surface is
set to be greater than or equal to 120 degrees.
Claim 24
Dependent Claim
71 words
A joined structure of dissimilar metallic materials, one of which is
made of aluminum or an aluminum alloy and the other of which is made
of copper or a copper alloy, said metallic materials being joined by the
friction welding, wherein angles of said metallic materials to a free edge of
said other metallic material at an end portion of a joined surface are set to
be smaller than 90 degrees.
Claim 25
Dependent Claim
99 words
A joined structure of dissimilar metallic materials, one of which is
made of aluminum or an aluminum alloy and the other of which is made
of copper or a copper alloy, said metallic materials being joined by the
friction welding, wherein when one of angles of said metallic materials to
free edges of the respective metallic materials at an end portion of a joined
surface is 90 degrees, the other angle of said metallic materials to free
edges of the respective metallic materials at the end portion of the joined
surface is set to be smaller than 90 degrees.
Claim 26
Dependent Claim
52 words
A joined structure of dissimilar metallic materials as set forth in
any one of claims 22 through 25, wherein a reaction layer of an
intermetallic compound being made of aluminum or an aluminum alloy
and copper or a copper alloy has a thickness of less than or equal to 20 µ
m.
Claim 27
Dependent Claim
33 words
A joined structure of dissimilar metallic materials as set forth in
any one of claims 22 through 26, wherein a joined portion has the same
electrical resistance as that of a base metal.
Claim 28
Dependent Claim
60 words
A joined structure of dissimilar metallic materials as set forth in
any one of claims 22 through 25, wherein said metallic materials having
different rigidities are joined by joining means which uses any one of
friction welding, cold welding, hot welding, diffusion joining, explosion
welding, forge welding, ultrasonic joining, brazing, soldering, resistance
welding, molten metal injection, cast joint and adhesive.
Claim 29
Dependent Claim
58 words
A joined structure of dissimilar metallic materials as set forth in
any one of claims 22 through 28, which is used for a power breaker, and
wherein at least a contact portion of a contact is made of copper or a
copper alloy, and the remaining portion of the contact is made of
aluminum or an aluminum alloy.
Claim 30
Dependent Claim
39 words
A joined structure of dissimilar metallic materials as set forth in
any one of claims 22 through 28, which is used as a current-carrying part,
and wherein a joined surface is apart from a contact portion of a contact.
Claim 31
Dependent Claim
71 words
A coating end structure comprising: a recessed metal base; and a
coating member of a coating material which has a smaller rigidity than
that of the metal base and which is coated on the metal base, wherein an
angle of said metal base to a free edge at the coating end portion is greater
than or equal to 120 degrees or in the range of from 55 degrees to 85
degrees.
Claim 32
Dependent Claim
71 words
A coating end structure comprising: a recessed metal base; and a
coating member of a coating material which has a greater rigidity than
that of the metal base and which is coated on the metal base, wherein an
angle of said metal base to a free edge at the coating end portion is smaller
than or equal to 60 degrees or in the range of from 95 degrees to 125
degrees.
Claim 33
Dependent Claim
40 words
A coating end structure as set forth in claim 31 or 32, wherein
said coating member is coated on said metal base by coating means
which uses any one of the thermal spraying, PVD, CVD, welding, brazing,
soldering and adhesive.
Claim 34
Dependent Claim
20 words
A coating end structure as set forth in claim 31, wherein said
metal base is copper or a copper alloy.
Claim 35
Dependent Claim
50 words
A coating end structure as set forth in claim 32, wherein said
metal base is made of a material selected from the group consisting of
aluminum and an aluminum alloy, and said coating material is selected
from the group consisting of copper, a copper alloy, silver and a silver
alloy.
Claim 36
Dependent Claim
98 words
A coating end structure of a current-carrying part for use in a
power breaker having a coating structure comprising a recessed contact
body and a contact portion coated on the contact body, wherein said
contact body is made of a metal base, and said coating portion is made of
a coating material having a smaller rigidity than that of the metal base,
and wherein an angle of said metal base to a free edge at the coating end
portion is smaller than or equal to 60 degrees or in the range of from 95
degrees to 125 degrees.
Claim 37
Dependent Claim
34 words
A coating end structure as set forth in claim 36, wherein said
contact portion is made of a material selected from the group consisting of
copper, a copper alloy, silver and a silver alloy.
Claim 38
Dependent Claim
29 words
A coating end structure as set forth in claim 36, wherein the
coating end portion is set at a position apart from the contact portion of
the current-carrying contact.
Claim 39
Dependent Claim
43 words
A coating end structure as set forth in claim 36, wherein the
interface of the coating portion, on which the contact portion is coated on
the body portion of the current-carrying contact, has the same electrical
resistance as that of a base metal.
Claim 40
Dependent Claim
101 words
A coating end structure of a conductor for use in a power breaker
or switch having a coating structure comprising a recessed conductor
body and a conductor contact portion coated on the conductor body,
wherein said conductor body is made of a metal base, and said conductor
contact portion is made of a coating base having a greater rigidity than
that of the metal base, and wherein an angle of said metal base to a free
edge at the coating end portion is smaller than or equal to 60 degrees or in
the range of from 95 degrees to 125 degrees.
Claim 41
Dependent Claim
36 words
A coating end structure as set forth in claim 40, wherein said
conductor contact portion is made of a coating material selected from the
group consisting of copper, a copper alloy, silver and a silver alloy.
Claim 42
Dependent Claim
47 words
A coating end structure as set forth in claim 31, wherein said
metal base is an Ni or Co group heat resisting alloy, and said coating
material having a smaller rigidity than that of said metal base is an
MCrAlY alloy, wherein M is Ni and/or Co.
Claim 43
Dependent Claim
100 words
A coating end structure of a moving blade or a combustor for use
in a gas turbine having a coating structure comprising a recessed body
and a corrosion resisting portion coated on the body, wherein said body is
made of a base metal, and said corrosion resisting portion is made of a
coating material having a smaller rigidity than that of said metal base,
and wherein an angle of said metal base to a free edge at the coating end
portion is greater than or equal to 120 degrees or in the range of from 55
degrees to 85 degrees.
Claim 44
Dependent Claim
41 words
A coating end structure as set forth in claim 43, wherein said
body is made of an Ni or Co group heat resisting alloy, and said heat
resisting portion is made of an MCrAlY alloy, wherein M is Ni and/or Co.
Claim 45
Dependent Claim
104 words
A coating end structure of a moving blade or a combustor for use
in a gas turbine having a coating structure comprising a recessed body
and a corrosion resisting portion coated on the body, wherein said body is
made of a base metal, and said corrosion resisting portion comprises a
bond coat material and a topcoat material which have a smaller rigidity
than that of said metal base, and wherein an angle of said metal base to a
free edge at the coating end portion is greater than or equal to 120 degrees
or in the range of from 55 degrees to 85 degrees.
Claim 46
Dependent Claim
56 words
A coating end structure as set forth in claim 45, wherein said
body is made of an Ni or Co group heat resisting alloy, said bond coat
material of said heat resisting portion is an MCrAlY alloy, wherein M is Ni
and/or Co, and said topcoat material coated on said bond coat material is
zirconia ceramics..
References Cited (Backward Citations)
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