CN114289834A - Defect welding repair method for titanium-steel composite plate - Google Patents
Defect welding repair method for titanium-steel composite plate Download PDFInfo
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- CN114289834A CN114289834A CN202111530443.8A CN202111530443A CN114289834A CN 114289834 A CN114289834 A CN 114289834A CN 202111530443 A CN202111530443 A CN 202111530443A CN 114289834 A CN114289834 A CN 114289834A
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- welding
- steel
- titanium
- copper
- defect
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- 238000003466 welding Methods 0.000 title claims abstract description 59
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 230000007547 defect Effects 0.000 title claims abstract description 20
- 230000008439 repair process Effects 0.000 title claims abstract description 18
- 229910001200 Ferrotitanium Inorganic materials 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910000831 Steel Chemical group 0.000 claims abstract description 34
- 239000010959 steel Chemical group 0.000 claims abstract description 34
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 27
- 239000010936 titanium Substances 0.000 claims abstract description 27
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 230000004927 fusion Effects 0.000 claims abstract description 5
- 238000009499 grossing Methods 0.000 claims abstract description 4
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 239000000155 melt Substances 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 6
- 239000010962 carbon steel Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 230000002950 deficient Effects 0.000 claims 2
- 239000000945 filler Substances 0.000 abstract description 2
- 238000007585 pull-off test Methods 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CYKMNKXPYXUVPR-UHFFFAOYSA-N [C].[Ti] Chemical compound [C].[Ti] CYKMNKXPYXUVPR-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910010340 TiFe Inorganic materials 0.000 description 1
- 229910010336 TiFe2 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
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- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a defect welding repair method of a titanium-steel composite plate, which is characterized by comprising the following steps of: 1) polishing and smoothing the defect position of the groove of the titanium and steel bonding layer, and then carrying out PT inspection; 2) adopting a manual TIG welding method, wherein the filling welding material is pure copper; the arc first melts the steel side and then introduces pure braze material; 3) the pure copper welding material is completely melted and forms transition connection with the steel side; 4) welding a transition copper welding seam which forms transition connection with the steel side and the titanium material side by using non-melting electrode inert gas for shielded welding; during the operation, the direct fusion welding of titanium and steel to form a brittle metal piece compound is avoided. According to the invention, copper is used as an intermediate filler, so that titanium and steel are indirectly welded together, and a titanium-copper-steel joint is formed, thus a brittle metal piece compound formed by direct fusion welding of titanium and steel is avoided, and the problem that a titanium-steel composite plate is difficult to weld and repair is solved.
Description
Technical Field
The invention relates to manual TIG welding of defects of a titanium-carbon steel composite layer (plate) and a titanium-stainless steel composite layer (plate) joint part, and covers the field of defect repair of titanium composite plates of cooling conversion part sleeves of nuclear power, gas turbines, ships, steam compressors and the like. In particular to a method for repairing the defect welding of a titanium-steel composite plate.
Background
In order to avoid corrosion of heat exchange devices such as a condenser, an oil cooler and the like and other heat exchangers of the conventional steam turbine, an end plate of the steam turbine usually adopts a titanium-carbon steel or titanium-stainless steel composite plate, and a titanium composite layer is frequently partially dropped or has processing defects due to improper protection or collision in the processes of processing, transportation and welding.
Because the expansion coefficients and the thermal conductivities of titanium, carbon steel and stainless steel wires are large, if the welding mode is directly adopted for repair, the welding process is fragile due to the existence of large internal stress, brittle intermetallic compounds TiFe and TiFe2 easily formed by iron and titanium, and brittle TiC compounds easily formed by carbon in titanium and steel, cracks are inevitably generated in the repair process, and repair welding repair is difficult. Therefore, a repair scheme for effectively eliminating the defects of the bonding position of the titanium composite plate is urgently needed to be provided, and the problem that the titanium composite plate is difficult to weld and repair is solved.
Disclosure of Invention
The invention aims to solve the technical problems and provides a defect welding repair method for a titanium-steel composite plate, which can effectively eliminate the defect of the combination position of the titanium-steel composite plate and solve the problem that the titanium-steel composite plate is difficult to weld and repair.
The technical scheme for realizing the invention is as follows: the defect welding repair method of the titanium-steel composite plate is characterized by comprising the following steps of:
1) polishing and smoothing the defect position of the groove of the titanium and steel bonding layer, and then carrying out PT inspection;
2) adopting a manual TIG welding method, wherein the filling welding material is pure copper; the arc first melts the steel side and then introduces pure braze material;
3) the pure copper welding material is completely melted and forms transition connection with the steel side;
4) welding a transition copper welding seam which forms transition connection with the steel side and the titanium material side by using non-melting electrode inert gas for shielded welding; during the operation, the direct fusion welding of titanium and steel to form a brittle metal piece compound is avoided.
Monitoring the temperature among welding seams during welding, wherein the temperature among the welding seams in the welding operation step is controlled within 60 ℃;
the steel is carbon steel or stainless steel.
The invention has the beneficial effects that:
1. the invention adopts copper as an intermediate filler, so that titanium and steel are indirectly welded together, and the titanium-copper-steel joint is formed. The formation of brittle metal piece compound by direct fusion welding of titanium and steel is avoided.
2. The invention effectively eliminates the defect of the bonding position of the titanium-steel composite board and solves the problem that the titanium-steel composite board is difficult to weld and repair
Drawings
FIG. 1 is a schematic view of a defect structure of a titanium-steel composite panel;
FIG. 2 is a schematic view of a defect repair structure of a titanium-steel composite panel;
FIG. 3 is a schematic view of a welding structure of a titanium pipe and a steel plug.
Reference numbers in the figures: 1-defect, 2-titanium material, 3-steel material, 4-copper material, 5-joint, 6-test weld, 7-steel plug, 8-titanium pipe.
Detailed Description
As shown in fig. 1 and 2, a method for repairing a defect of a titanium-steel composite plate by welding comprises the following steps:
1) polishing and smoothing the position of the groove defect 1 of the bonding layer of the titanium material 2 and the steel material 3, and then performing PT inspection according to JB/T4730;
2) adopting a manual TIG welding method, wherein the filling welding material is pure copper; the arc first melts the steel side and then introduces pure braze material;
3) the pure copper welding material is completely melted and forms transition connection with the steel side;
4) welding a transition copper welding seam which forms transition connection with the steel side and the titanium material side by using non-melting electrode inert gas for shielded welding; during operation, the titanium material 2 and the steel material 3 are prevented from being directly welded to form a brittle metal piece compound.
Monitoring the temperature among welding seams during welding, wherein the temperature among the welding seams in the welding operation step is controlled within 60 ℃; the steel is carbon steel or stainless steel.
And (3) performing joint tensile test, wherein a data table of the joint tensile test is shown in table 1.
TABLE 1 tensile test data sheet for joints
As shown in figure 3, a titanium pipe 8 and a steel plug 7 which have the same specification as the product are welded to form a test welding seam 6, and a pull-off test blind pipe is manufactured. And performing a pull-out force test after tube expansion according to the technological requirements of products, and piling up the blind tubes by 10mm to expose the repair welding area. The results are shown in Table 2 for pull-off test data.
The deposited metal keeps the shape of the inner wall of the pipe hole after being extruded. The pull-off force test result meets the standard requirement.
TABLE 2 Pull-off test data sheet
Claims (3)
1. The defect welding repair method of the titanium-steel composite plate is characterized by comprising the following steps of:
1) polishing and smoothing the defect position of the groove of the titanium and steel bonding layer, and then carrying out PT inspection;
2) adopting a manual TIG welding method, wherein the filling welding material is pure copper; the arc first melts the steel side and then introduces pure braze material;
3) the pure copper welding material is completely melted and forms transition connection with the steel side;
4) welding a transition copper welding seam which forms transition connection with the steel side and the titanium material side by using non-melting electrode inert gas for shielded welding; during the operation, the direct fusion welding of titanium and steel to form a brittle metal piece compound is avoided.
2. The method for repairing defective welding of titanium-steel composite panels according to claim 1, wherein: and during welding, the temperature between welding seams is monitored, and the temperature between the welding seams is controlled within 60 ℃ in the welding operation step process.
3. The method for repairing defective welding of titanium-steel composite panels according to claim 1, wherein: the steel is carbon steel or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111530443.8A CN114289834A (en) | 2021-12-15 | 2021-12-15 | Defect welding repair method for titanium-steel composite plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111530443.8A CN114289834A (en) | 2021-12-15 | 2021-12-15 | Defect welding repair method for titanium-steel composite plate |
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| Publication Number | Publication Date |
|---|---|
| CN114289834A true CN114289834A (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111530443.8A Pending CN114289834A (en) | 2021-12-15 | 2021-12-15 | Defect welding repair method for titanium-steel composite plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117428296A (en) * | 2023-12-07 | 2024-01-23 | 鞍钢股份有限公司 | Melting and welding process for titanium steel composite plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1092496A2 (en) * | 1999-10-12 | 2001-04-18 | Visteon Global Technologies, Inc. | Method for repairing steel spray-formed tooling with TIG welding process |
| CN102632324A (en) * | 2011-02-09 | 2012-08-15 | 壳牌化学西拉雅私人有限公司 | Method for welding dissimilar metals |
| CN103949757A (en) * | 2014-05-08 | 2014-07-30 | 中国航空工业集团公司北京航空材料研究院 | Process for repairing pits in titanium alloy aircraft sliding rail in argon arc welding way |
| CN104588897A (en) * | 2014-11-21 | 2015-05-06 | 东方电气集团东方汽轮机有限公司 | Titanium-steel composite plate bonding layer defect repair method |
| CN113145981A (en) * | 2021-04-16 | 2021-07-23 | 鞍钢股份有限公司 | Titanium steel composite board damage repair welding method |
-
2021
- 2021-12-15 CN CN202111530443.8A patent/CN114289834A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1092496A2 (en) * | 1999-10-12 | 2001-04-18 | Visteon Global Technologies, Inc. | Method for repairing steel spray-formed tooling with TIG welding process |
| CN102632324A (en) * | 2011-02-09 | 2012-08-15 | 壳牌化学西拉雅私人有限公司 | Method for welding dissimilar metals |
| CN103949757A (en) * | 2014-05-08 | 2014-07-30 | 中国航空工业集团公司北京航空材料研究院 | Process for repairing pits in titanium alloy aircraft sliding rail in argon arc welding way |
| CN104588897A (en) * | 2014-11-21 | 2015-05-06 | 东方电气集团东方汽轮机有限公司 | Titanium-steel composite plate bonding layer defect repair method |
| CN113145981A (en) * | 2021-04-16 | 2021-07-23 | 鞍钢股份有限公司 | Titanium steel composite board damage repair welding method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117428296A (en) * | 2023-12-07 | 2024-01-23 | 鞍钢股份有限公司 | Melting and welding process for titanium steel composite plate |
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Application publication date: 20220408 |