CN1490119A - Solders for titanium alloy non-melting electrode argon arc welding - Google Patents
Solders for titanium alloy non-melting electrode argon arc welding Download PDFInfo
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- CN1490119A CN1490119A CNA021308861A CN02130886A CN1490119A CN 1490119 A CN1490119 A CN 1490119A CN A021308861 A CNA021308861 A CN A021308861A CN 02130886 A CN02130886 A CN 02130886A CN 1490119 A CN1490119 A CN 1490119A
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- welding
- flux
- titanium alloy
- argon arc
- arc welding
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Abstract
A flux for the argon arc welding of Ti alloy by use of non-consumable electrode contains CaF2 (75-82 wt.%), BaF2 (0-3), MgF2 (5-10) and AlF3 (rest). Its advantages are simple welding technology, less air holes in welded seam, and low cost.
Description
The present invention relates to a welding flux for titanium alloy non-consumable electrode argon arc welding, which is a mixture formed from metal fluoride.
The non-consumable electrode argon arc welding plays an important role in the welding industry, can realize various types of welding joints at different spatial positions, has a series of advantages of good protection, stable welding process, wide welding range, flat and smooth joints, attractive appearance and the like, and can realize mechanization, automation and even artificial intelligence. However, two problems still exist in the current titanium alloy non-consumable electrode argon arc welding process, the first problem is that only a titanium alloy plate with the thickness of 3mm can be completely welded in the titanium alloy single-pass TIG welding without beveling, and the TIG welding of the titanium alloy with the thickness exceeding 3mm can cause huge increase of labor force loss and reduction of joint reliability along with the increase of the thickness; the second problem is that the weld porosity problem is difficult to overcome during welding due to the reactivity of the titanium alloy, which results in a reduction in joint performance.
The invention aims to overcome the defects in the prior art, and provides a welding flux for titanium alloy non-consumable electrode argon arc welding, which realizes the advantages of simple process, low energy consumption, high efficiency, low cost and good application effect when a titanium alloy workpiece is welded by using the non-consumable electrode argon arc welding.
The aim of the invention is achieved by the following measures:
the welding flux for titanium alloy non-consumable electrode argon arc welding is characterized by comprising the formula components. The components and the proportion of the welding flux are CaF according to the weight percentage275～82％，BaF20～3％，MgF25-10% of AlF3. The components are mixed according to a certain proportion, then melted in a crucible of high-frequency equipment, and then the flux is poured into a water-cooled container to be cooled to room temperature. And then, crushing the welding flux by using a universal crusher to obtain powder with the granularity of less than 300 meshes, namely the welding flux. Before welding a workpiece, the flux is dissolved and mixed uniformly by a solvent, then the flux is uniformly sprayed on the part to be welded (the sprayed thickness is determined according to the different parts to be welded), and the welding can be carried out after the solvent is volatilized.
During welding, the high temperature action of the arc and the movement action of the anode spot on the molten flux enable a large amount of flux vapor to enter an arc area, and promote the decomposition process of molecules in the high temperature area of the arc and the process of forming molecules by atoms in the peripheral area of the arc, thereby increasing the heat conductivity of the arc plasma and causing the arc to shrink. In addition, the decomposition products of the flux vapors entering the arc zone interact with the solid, liquid, and gaseous titanium alloy to form titanium fluoride in different valence states.
Herein Me refers to a certain metal element.
Titanium fluoride traps electrons in the arc anode region to form negative ions (TiF)n -) The size of the conductive area of the arc column is reduced, thereby producing a compressive action on the arc. Secondly, the shielding effect of the molten flux against the molten pool base metal and the squeezing effect of the flux also reduce the diameter of the anode spot, resulting in an increase in current density and an increase in penetration. At the same time, a part of TiFnEntering into the molten pool to react with H in the molten pool to generate TiFnHmA polymer, which reduces the tendency to generate porosity in titanium alloy welds.
The invention has the unexpected effect by using in the welding of BT20 titanium alloy and TC4 titanium alloy, and has strong function of improving the penetration. Under the same welding process parameters, compared with the traditional non-consumable electrode gas shielded welding, the fusion depth can be improved by 1-2 times, and meanwhile, through tests, the mechanical property of the joint is higher than that of the common non-consumable electrode argon arc welding.
The present invention will be further described in detail with reference to the following examples:
example 1 weighing CaF280 g of BaF23 g of MgF23 g, AlF314 g of the components were melted in a crucible and then poured into a water-cooled vessel to cool to room temperature. And then the flux is crushed by a universal crusher to obtain powder with the granularity of less than 300 meshes, namely the flux. When 3mm titanium alloy is welded, the welding process parameters adopting the welding flux are as follows: the welding current is 120 amperes, the welding voltage is 7-8 volts, and the welding speed is 15 m/h. The technological parameters of TIG welding without adopting welding flux are as follows: the welding current is 200 amperes, the welding voltage is 10-12 volts, and the welding speed is 12 m/h. After welding, X-ray examination revealed that the joints welded with flux had essentially no porosity, while the joints welded with TIG welding had a large amount of porosity.
Example 2 weighing CaF285G, BaF24 g of MgF23 g, AlF35 g, the components are melted in a crucible and then poured into a water-cooled vessel to be cooled to room temperature. And then the flux is crushed by a universal crusher toobtain powder with the granularity of less than 300 meshes, namely the flux. When 3mm titanium alloy is welded, the welding process parameters adopting the welding flux are as follows: the welding current is 115 amperes, the welding voltage is 7-8 volts, and the welding speed is 15 m/h. The technological parameters of TIG welding without adopting welding flux are as follows: the welding current is 200 amperes, the welding voltage is 10-12 volts, and the welding speed is 12 m/h. After welding, X-ray examination revealed that the joints welded with flux had essentially no porosity, while the joints welded with TIG welding had a large amount of porosity.
Example 3 weighing CaF283 g of BaF23 g of MgF24 g, AlF310 g of the above components were melted in a crucible and then poured into a water-cooled vessel to cool to room temperature. And then the flux is crushed by a universal crusher to obtain powder with the granularity of less than 300 meshes, namely the flux. When 3mm titanium alloy is welded, the welding process parameters adopting the welding flux are as follows: the welding current is 100 amperes, the welding voltage is 7-8 volts, and the welding speed is 15 m/h. The technological parameters of TIG welding without adopting welding flux are as follows: the welding current is 200 amperes, the welding voltage is 10-12 volts, and the welding speed is 12 m/h. After welding, X-ray examination revealed that the joints welded with flux had no porosity at all, whereas the joints welded with TIG welding had a large number of porosity.
The flux of the invention simplifies the prior welding process, overcomes the defect of shallow fusion depth, reduces the pore tendency of welding seams, and realizes the aims of good effect, low energy consumption, high efficiency and low cost.
Claims (3)
1. The welding flux for titanium alloy non-consumable electrode argon arc welding is characterized in that: the welding flux comprises the following components in percentage by weight:
CaF275～82％，BaF20～3％，MgF25-10% of AlF3。
2. The flux for titanium alloy argon arc welding with non-consumable electrode as claimed in claim 1, wherein: CaF in the flux component2、BaF2、MgF2The weight percentages of the components are respectively 80-82%, 3% and 5%.
3. The flux for titanium alloy argon arc welding with non-consumable electrode as claimed in claim 1, wherein: the flux is granular, and the granularity of the flux is less than 300 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02130886 CN1211181C (en) | 2002-10-15 | 2002-10-15 | Solders for titanium alloy non-melting electrode argon arc welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02130886 CN1211181C (en) | 2002-10-15 | 2002-10-15 | Solders for titanium alloy non-melting electrode argon arc welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1490119A true CN1490119A (en) | 2004-04-21 |
| CN1211181C CN1211181C (en) | 2005-07-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02130886 Expired - Lifetime CN1211181C (en) | 2002-10-15 | 2002-10-15 | Solders for titanium alloy non-melting electrode argon arc welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1211181C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497156B (en) * | 2008-01-29 | 2011-02-02 | 沈阳铸造研究所 | Argon arc-welding fluid for eliminating aluminum castings repairing welding gas hole defect |
| CN102626839A (en) * | 2011-11-24 | 2012-08-08 | 兰州理工大学 | Active agent for titanium alloy tungsten electrode argon arc welding |
| WO2023134149A1 (en) * | 2022-01-11 | 2023-07-20 | 哈尔滨焊接研究院有限公司 | Tc4 titanium alloy submerged arc welding flux, a preparation method therefor and application thereof |
-
2002
- 2002-10-15 CN CN 02130886 patent/CN1211181C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497156B (en) * | 2008-01-29 | 2011-02-02 | 沈阳铸造研究所 | Argon arc-welding fluid for eliminating aluminum castings repairing welding gas hole defect |
| CN102626839A (en) * | 2011-11-24 | 2012-08-08 | 兰州理工大学 | Active agent for titanium alloy tungsten electrode argon arc welding |
| WO2023134149A1 (en) * | 2022-01-11 | 2023-07-20 | 哈尔滨焊接研究院有限公司 | Tc4 titanium alloy submerged arc welding flux, a preparation method therefor and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1211181C (en) | 2005-07-20 |
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Granted publication date: 20050720 |
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