CA1174290A - Welding method of reinforcing a titanium structure by means of a supporting structure of some other metal - Google Patents
Welding method of reinforcing a titanium structure by means of a supporting structure of some other metalInfo
- Publication number
- CA1174290A CA1174290A CA000358088A CA358088A CA1174290A CA 1174290 A CA1174290 A CA 1174290A CA 000358088 A CA000358088 A CA 000358088A CA 358088 A CA358088 A CA 358088A CA 1174290 A CA1174290 A CA 1174290A
- Authority
- CA
- Canada
- Prior art keywords
- titanium
- aluminum
- supporting structure
- welding
- attached
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
- B23K9/232—Arc welding or cutting taking account of the properties of the materials to be welded of different metals
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Tents Or Canopies (AREA)
- Revetment (AREA)
- Microwave Amplifiers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A titanium structure has been reinforced with supporting struc-ture of some other metal by gas arc welding the supporting structure directly to the titanium structure or by gas arc welding first an aluminum alloy onto the titanium structure and then attaching the supporting structure to aluminum alloy welded on the titanium structure by conventional welding or soldering.
A titanium structure has been reinforced with supporting struc-ture of some other metal by gas arc welding the supporting structure directly to the titanium structure or by gas arc welding first an aluminum alloy onto the titanium structure and then attaching the supporting structure to aluminum alloy welded on the titanium structure by conventional welding or soldering.
Description
2~3 The present invention relates to a method of reinforcing a titanium structure, in particular the wall of a titanium tank, by means of a supporting structure of some other metal, e.g.
aluminum, by attaching the supporting s-tructure firmly to the titanium structure or, alternatively, by attaching a titanium mantle and an aluminum mantle to each other.
-Currently titanium is commonly used in structures in whichhigh resistance to corrosion or an advan-tageous strength/weight ratio is required. Owing to the high price of titanium, it is desirable to make the structures with as small a quantity of titanium as possible and to proportion it with~precision. The proportion of titanium in titanium structures nas been reduced by using supporting structures made of less expensive metals.
However, since attaching other metals to ti-ta~ium by welding has proven to be very difficul-t, it has been~necessary to attach the said supporting structures to titanium structures by other means, e.g. by screw and staple joints. Screw and staple joints require, however, a great deal of work and special attachment lugs for their a-ttachment to the titanium, 2 ~74~
and therefore the structures become prone to corrosion and do not provide support evenly to the titanium structures.
An aluminum contact rail has been previously attached to titanium electrodes even without the transmission of screw joints. An aluminum member has been cast to the electrode arm fitted through the mantle part of the cell, and this aluminum member for its part has been attached to the aluminum contact rail by a screw join-t, for example, as disclosed in British Patent 1,127,484.
A structure of this type requires titanium lugs to which the -aluminum can be cast. Casting the ends of the lugs in aluminum is, furthermore, a difficult work stage.
The joint between a contact rail and a titanium anode has also been implemented by attaching the electrode by bolts to anode supports inside the electrolytic tank. These supports can be resistance welded in a single stage to the titanium mantle part and this mantle part in turn to the aluminum conductor, provided that the thickness of the aluminum is less than 3 mm, as explainec in sritish Patent 1,125,493. The weakness of this structure lies mainly in that it is not suitable for structures in which an aluminum thickness greater than 3 mm is required.
A titanium plate explosion joined to another metal has also been used, but joining such plates is difficult, as is their design and the making of inlets, and, furthermore, the structure is expensive.
German Patent Application 2603626 discloses another method for attaching an aluminum contact rail to the mantle part of a titanium electrolytic tank. In this case a copper, aluminum, steel and titanium pin has been attached to the titanium mantle part by means of friction and condensator discharge bolt welding. The aluminum pin can then be embedded into the bores drilled in the aluminum plate, and can then be welded on to the plate. The structure is complicated and uneconomical and is suitable only for certain special uses.
In German Patent Application 2735059, an aluminum contact rail is attached to a titanium base plate by means of melted contact washers made from soldering metal, these plates ~L~742~
02 having been pre-soldered by means of a probe connected 03 to ul-trasonic source. AQ with other soldering 04 methods, this iæ difEicult since it re~uires special 05 equipment and since the soldering must be performed in 06 a vacuum or in a sllield yas, in which the oxide eilm 07 of the titanium must also be removed.
08 The object Oe the present invention is 09 therefore to provide a method for reinforcing a titanium structure, producing a maximal support 11 economically and without special devices.
12 According to the present invention there 13 is provided a method of reinforcing a titanium 14 structure by means of a supporting structure of another metal, by attaching the supporting structure 16 firmly to the titanium structure, characterised in 17 that the supporting structure is attached to the 18 titanium structure with aluminum by gas-shielded arc 19 welding either directly, if the supporting structure is aluminum, or by first gas-shielded arc welding an 21 aluminum layer on to the titanium structure with 22 aluminum, and then attaching the supporting structuxe 23 to the said layer on to the titanium structure, by 24 conventional means.
The method according to one embodiment of 26 the invention for reinforcing a titanium structure by 27 means of a supporting structure of another metal by 28 attaching the supporting structure firmly to the 29 titanium structure i8 primarily characterised in that a supporting structure of aluminum may be attached to 31 the titanium structure by gas-shielded arc welding 32 with aluminum. Alternatively aluminum is gas-shielded 33 arc welded onto the titanium structure to form a 34 layer, and the supporting structure is then attached to the aluminum layer by conventional means, e.g. by 36 welding or soldering. In the last mentioned case the 37 supporting structure need not be of aluminum, but . ~
.
~.~'7~2~
02 could be for example, iron or other suitable 03 construction materia].
04 The supporting structure may be attached 05 to the titanium structure advantageously by MIG or TIG
06 welding. The supporting structure used can be 07 aluminum stifeners, supports or gripping members.
08 By the method according to the invention, 09 it is possible to obtain good support for a titanium structure without complicated screw-joint or 11 staple-joint structures, and the supporting structure 12 can be attached to the titanium structure directly, 13 without additional lugs. By the method according to 14 the invention it is possible to produce a simple, easily maintained and inexpensive reinforced titanium 16 structure.
17 In said one embodiment the supporting 18 structure is welded directly on to the ti.tanium 19 structure by gas-shielded arc welding, preferably by MIG or TIG welding. In tensile tests performed on a 21 welded test rod, the strength of the weld joint was 22 observed to correspond to the streng~h of aluminum.
23 Alternatively, aluminum can be gas-shielded arc welded 24 on to the titanium structure of part of it, and a supporting structure can be attached to this aluminum 26 weld by conventional means.
27 The invention is described below in more 28 detail with reference to the accompanying drawing, in 29 which:
Figure 1 depicts a cross-sectional partial 31 view of a titanium tank wall, to which a stiffening 32 rib has been attached by the method according to the 33 invention, 34 Figure 2 depicts a cross-sectional partial view of another titanium tank, to which a 36 reinforcement plate has been attached by the method 37 according to the invention, ., i~
i ~ ~7~L2~9 01 _ 5 _ 02 Figure 3 depicts a cross-sectional partial 03 view of a ~itanium tank pipe joint to w~ich a 04 reinforcement ring has been attached by the method 05 according to tl~e invention, and 06 Figure 4 depicts a cross-sectional partial 07 view of an aluminum tank inside which a titanium 08 lining has been attached by the method according to 09 the invention.
In Figures 1, 2 and 3, a stiffening rib 11 2a, reinforcement plate 2b and reinforcement ring 2c 12 respectively are attached directly to the titanium 13 tank wall 1 by MIG or TIG welding 3. In the example 14 shown in Figure 2 an aluminum layer 3a is first attached onto the titanium structure 1 by gas-shielded 16 arc welding with aluminum and then the supporting 17 structure 2b is attached to the aluminum layer 3a on 18 the structure 1 by conventional means such as welding 19 or soldering 4. ~sing this method, it has been possible to use a considerably thinner wall in the 21 titanium tank, which has been supported by stiffening 22 or supporting members made from a less expensive 23 metal.
24 The structure shown in Figure 4 is manufactured according to the invention by making 26 holes in an aluminum tank 2d and by fitting a titanium 27 lining la inside the aluminum tank 2d~ The lining is 28 attached to the aluminum tank 2d by means of welding 29 performed through its holes, so-called plug welding, the welding material being shown at 3. Thereby the 31 proportion of titanium in the structure can be 32 reduced.
,.
aluminum, by attaching the supporting s-tructure firmly to the titanium structure or, alternatively, by attaching a titanium mantle and an aluminum mantle to each other.
-Currently titanium is commonly used in structures in whichhigh resistance to corrosion or an advan-tageous strength/weight ratio is required. Owing to the high price of titanium, it is desirable to make the structures with as small a quantity of titanium as possible and to proportion it with~precision. The proportion of titanium in titanium structures nas been reduced by using supporting structures made of less expensive metals.
However, since attaching other metals to ti-ta~ium by welding has proven to be very difficul-t, it has been~necessary to attach the said supporting structures to titanium structures by other means, e.g. by screw and staple joints. Screw and staple joints require, however, a great deal of work and special attachment lugs for their a-ttachment to the titanium, 2 ~74~
and therefore the structures become prone to corrosion and do not provide support evenly to the titanium structures.
An aluminum contact rail has been previously attached to titanium electrodes even without the transmission of screw joints. An aluminum member has been cast to the electrode arm fitted through the mantle part of the cell, and this aluminum member for its part has been attached to the aluminum contact rail by a screw join-t, for example, as disclosed in British Patent 1,127,484.
A structure of this type requires titanium lugs to which the -aluminum can be cast. Casting the ends of the lugs in aluminum is, furthermore, a difficult work stage.
The joint between a contact rail and a titanium anode has also been implemented by attaching the electrode by bolts to anode supports inside the electrolytic tank. These supports can be resistance welded in a single stage to the titanium mantle part and this mantle part in turn to the aluminum conductor, provided that the thickness of the aluminum is less than 3 mm, as explainec in sritish Patent 1,125,493. The weakness of this structure lies mainly in that it is not suitable for structures in which an aluminum thickness greater than 3 mm is required.
A titanium plate explosion joined to another metal has also been used, but joining such plates is difficult, as is their design and the making of inlets, and, furthermore, the structure is expensive.
German Patent Application 2603626 discloses another method for attaching an aluminum contact rail to the mantle part of a titanium electrolytic tank. In this case a copper, aluminum, steel and titanium pin has been attached to the titanium mantle part by means of friction and condensator discharge bolt welding. The aluminum pin can then be embedded into the bores drilled in the aluminum plate, and can then be welded on to the plate. The structure is complicated and uneconomical and is suitable only for certain special uses.
In German Patent Application 2735059, an aluminum contact rail is attached to a titanium base plate by means of melted contact washers made from soldering metal, these plates ~L~742~
02 having been pre-soldered by means of a probe connected 03 to ul-trasonic source. AQ with other soldering 04 methods, this iæ difEicult since it re~uires special 05 equipment and since the soldering must be performed in 06 a vacuum or in a sllield yas, in which the oxide eilm 07 of the titanium must also be removed.
08 The object Oe the present invention is 09 therefore to provide a method for reinforcing a titanium structure, producing a maximal support 11 economically and without special devices.
12 According to the present invention there 13 is provided a method of reinforcing a titanium 14 structure by means of a supporting structure of another metal, by attaching the supporting structure 16 firmly to the titanium structure, characterised in 17 that the supporting structure is attached to the 18 titanium structure with aluminum by gas-shielded arc 19 welding either directly, if the supporting structure is aluminum, or by first gas-shielded arc welding an 21 aluminum layer on to the titanium structure with 22 aluminum, and then attaching the supporting structuxe 23 to the said layer on to the titanium structure, by 24 conventional means.
The method according to one embodiment of 26 the invention for reinforcing a titanium structure by 27 means of a supporting structure of another metal by 28 attaching the supporting structure firmly to the 29 titanium structure i8 primarily characterised in that a supporting structure of aluminum may be attached to 31 the titanium structure by gas-shielded arc welding 32 with aluminum. Alternatively aluminum is gas-shielded 33 arc welded onto the titanium structure to form a 34 layer, and the supporting structure is then attached to the aluminum layer by conventional means, e.g. by 36 welding or soldering. In the last mentioned case the 37 supporting structure need not be of aluminum, but . ~
.
~.~'7~2~
02 could be for example, iron or other suitable 03 construction materia].
04 The supporting structure may be attached 05 to the titanium structure advantageously by MIG or TIG
06 welding. The supporting structure used can be 07 aluminum stifeners, supports or gripping members.
08 By the method according to the invention, 09 it is possible to obtain good support for a titanium structure without complicated screw-joint or 11 staple-joint structures, and the supporting structure 12 can be attached to the titanium structure directly, 13 without additional lugs. By the method according to 14 the invention it is possible to produce a simple, easily maintained and inexpensive reinforced titanium 16 structure.
17 In said one embodiment the supporting 18 structure is welded directly on to the ti.tanium 19 structure by gas-shielded arc welding, preferably by MIG or TIG welding. In tensile tests performed on a 21 welded test rod, the strength of the weld joint was 22 observed to correspond to the streng~h of aluminum.
23 Alternatively, aluminum can be gas-shielded arc welded 24 on to the titanium structure of part of it, and a supporting structure can be attached to this aluminum 26 weld by conventional means.
27 The invention is described below in more 28 detail with reference to the accompanying drawing, in 29 which:
Figure 1 depicts a cross-sectional partial 31 view of a titanium tank wall, to which a stiffening 32 rib has been attached by the method according to the 33 invention, 34 Figure 2 depicts a cross-sectional partial view of another titanium tank, to which a 36 reinforcement plate has been attached by the method 37 according to the invention, ., i~
i ~ ~7~L2~9 01 _ 5 _ 02 Figure 3 depicts a cross-sectional partial 03 view of a ~itanium tank pipe joint to w~ich a 04 reinforcement ring has been attached by the method 05 according to tl~e invention, and 06 Figure 4 depicts a cross-sectional partial 07 view of an aluminum tank inside which a titanium 08 lining has been attached by the method according to 09 the invention.
In Figures 1, 2 and 3, a stiffening rib 11 2a, reinforcement plate 2b and reinforcement ring 2c 12 respectively are attached directly to the titanium 13 tank wall 1 by MIG or TIG welding 3. In the example 14 shown in Figure 2 an aluminum layer 3a is first attached onto the titanium structure 1 by gas-shielded 16 arc welding with aluminum and then the supporting 17 structure 2b is attached to the aluminum layer 3a on 18 the structure 1 by conventional means such as welding 19 or soldering 4. ~sing this method, it has been possible to use a considerably thinner wall in the 21 titanium tank, which has been supported by stiffening 22 or supporting members made from a less expensive 23 metal.
24 The structure shown in Figure 4 is manufactured according to the invention by making 26 holes in an aluminum tank 2d and by fitting a titanium 27 lining la inside the aluminum tank 2d~ The lining is 28 attached to the aluminum tank 2d by means of welding 29 performed through its holes, so-called plug welding, the welding material being shown at 3. Thereby the 31 proportion of titanium in the structure can be 32 reduced.
,.
Claims (9)
AN EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE
DEFINED AS FOLLOWS:
1. A method of reinforcing a titanium structure by means of a supporting structure of another metal, by attaching the supporting structure firmly to the titanium structure, in which the supporting structure is attached to the titanium structure with aluminum by gas-shielded arc welding either directly, if the supporting structure is aluminum, or by firstly gas-shielded arc welding an aluminum layer on to the titanium structure with aluminum, and then attaching the supporting structure to the said layer welded on to the titanium structure, by conventional means.
2. A method according to claim 1, in which the supporting structure is attached to the titanium structure by MIG or TIG welding.
3. A method according to claim 1 or 2, in which the supporting structure used consists of aluminum stiffeners, supports or gripping members.
4. A method according to claim 1 or 2, for providing an aluminum tank with an inside titanium lining, in which the holes are formed in the aluminum tank and the titanium lining is attached to the aluminum tank by plug welding through these holes.
5. A method according to claim 1 or 2, for providing an aluminum tank with an inside titanium lining, and in which the supporting structure used consists of aluminum stiffeners, supports or gripping members, and in which holes are formed in the aluminum tank and the titanium lining is attached to the aluminum tank by plug welding through said holes.
6. A method according to claim 1 or 2, for providing an aluminum tank with an inside titanium lining, in which the holes are formed in the aluminum tank and the titanium lining is attached to the aluminum tank by plug welding through these holes, and the conventional means employed is welding or soldering.
7. A method according to claim 1 or 2 for providing an aluminum tank with an inside titanium lining, in which the holes are formed in the aluminum tank and the titanium lining is attached to the aluminum tank by plug welding through these holes, and in which the supporting structure used consists of aluminum stiffeners, supports or gripping members.
8. A method according to claim 1 or 2, in which the conventional means employed is welding or soldering.
9. A method according to claim 1 or 2, for providing an aluminum tank with an inside titanium lining, in which the holes are formed in the aluminum tank and the titanium lining is attached to the aluminum tank by plug welding through these holes, and in which the supporting structure used consists of aluminum stiffeners, supports or gripping members, in which the conventional means employed is welding or soldering.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI792619 | 1977-08-22 | ||
| FI792619A FI792619A (en) | 1979-08-22 | 1979-08-22 | SAETT ATT FOERSTAERKA EN TITANKONSTRUKTION MED EN STOEDKONSTRUKTION AV ANNAN METALL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1174290A true CA1174290A (en) | 1984-09-11 |
Family
ID=8512847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000358088A Expired CA1174290A (en) | 1977-08-22 | 1980-08-12 | Welding method of reinforcing a titanium structure by means of a supporting structure of some other metal |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5633195A (en) |
| CA (1) | CA1174290A (en) |
| DE (1) | DE3029959A1 (en) |
| FI (1) | FI792619A (en) |
| FR (1) | FR2463659B1 (en) |
| GB (1) | GB2057326B (en) |
| NO (1) | NO802262L (en) |
| SE (1) | SE444779B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI65177C (en) * | 1981-05-07 | 1984-04-10 | Finnish Chemicals Oy | SAETT ATT FOGA ALUMINUM TILL TITAN GENOM SVETSNING OCH EN SVETSPRODUKT AOSTADKOMMEN HAERIGENOM |
| JPS58175883U (en) * | 1982-05-15 | 1983-11-24 | 川端 祥夫 | Spot welding electrode |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2761047A (en) * | 1954-01-11 | 1956-08-28 | North American Aviation Inc | Joining aluminum and aluminum alloy to titanium and titanium alloy |
| US2937262A (en) * | 1957-12-23 | 1960-05-17 | Thompson Ramo Wooldridge Inc | Method of attaching stud to titanium bodies |
| DE1164208B (en) * | 1959-11-27 | 1964-02-27 | Continental Titanium Metals Co | Fusion welded connection between steel as the base material and titanium or its alloys as the cladding layer |
| GB1127484A (en) * | 1966-02-25 | 1968-09-18 | Murgatroyds Salt & Chem | Improvements in or relating to electrolytic diaphragm cells |
| GB1125493A (en) * | 1966-03-24 | 1968-08-28 | Imp Metal Ind Kynoch Ltd | Improvements in or relating to anode assemblies of electrolytic cells |
| JPS5221111B2 (en) * | 1971-10-06 | 1977-06-08 | ||
| GB1522622A (en) * | 1975-01-30 | 1978-08-23 | Ici Ltd | Electrolytic cells |
| AU512160B2 (en) * | 1976-08-04 | 1980-09-25 | Imperial Chemical Industries Ltd | Vacuum bonded anode assembly |
| JPS5380343A (en) * | 1976-12-25 | 1978-07-15 | Kobe Steel Ltd | Welding method |
| FI58656C (en) * | 1978-06-06 | 1981-03-10 | Finnish Chemicals Oy | ELEKTROLYSCELL OCH SAETT ATT FRAMSTAELLA DENSAMMA |
-
1979
- 1979-08-22 FI FI792619A patent/FI792619A/en not_active Application Discontinuation
-
1980
- 1980-07-25 NO NO802262A patent/NO802262L/en unknown
- 1980-08-01 GB GB8025239A patent/GB2057326B/en not_active Expired
- 1980-08-07 DE DE19803029959 patent/DE3029959A1/en active Granted
- 1980-08-12 CA CA000358088A patent/CA1174290A/en not_active Expired
- 1980-08-20 SE SE8005849A patent/SE444779B/en not_active IP Right Cessation
- 1980-08-22 JP JP11489780A patent/JPS5633195A/en active Pending
- 1980-08-22 FR FR8018381A patent/FR2463659B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2463659B1 (en) | 1985-08-02 |
| JPS5633195A (en) | 1981-04-03 |
| NO802262L (en) | 1981-02-23 |
| SE444779B (en) | 1986-05-12 |
| FI792619A (en) | 1981-02-23 |
| DE3029959A1 (en) | 1981-03-12 |
| DE3029959C2 (en) | 1989-08-03 |
| SE8005849L (en) | 1981-02-23 |
| GB2057326B (en) | 1983-03-02 |
| GB2057326A (en) | 1981-04-01 |
| FR2463659A1 (en) | 1981-02-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |