CN1048183A - Fast welding flux - Google Patents
Fast welding flux Download PDFInfo
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- CN1048183A CN1048183A CN 90106842 CN90106842A CN1048183A CN 1048183 A CN1048183 A CN 1048183A CN 90106842 CN90106842 CN 90106842 CN 90106842 A CN90106842 A CN 90106842A CN 1048183 A CN1048183 A CN 1048183A
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- welding flux
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Abstract
The present invention relates to the fast welding flux of aluminothermic process welding usefulness, fast welding flux of the present invention contains tetrachloro three-iron, steel scale of steel rolling, aluminium powder, zirconium powder, titanium slag and sodium fluoride.Fast welding flux of the present invention is applied to the repairing regeneration of various ironcastings, steel-casting, and welding quality is good, and filling capacity is good, simple to operate, melting welding speed is fast, can make the foundry goods of various damages improve the life-span 50%, reduce production costs, therefore have important economic benefit and social benefit.
Description
The present invention relates to welding field, particularly aluminothermic process welding.
Study the welding method and the solder flux of successfully multiple repair welding regeneration ironcasting, steel-casting at present both at home and abroad, as arc welding, soldering etc., but these methods have shortcoming: power consumption is big, the amount of labour is big, productivity ratio is low, contaminated environment.
The object of the invention is, a kind of, fast welding flux that fillibility good, simple to operate good without electric energy melting welding performance is provided.
The inventive method reaches like this, adopts the filling fast welding flux of aluminothermic process, and the object of the invention has been reached fully.
Below fast welding flux of the present invention is elaborated.
Fast welding flux of the present invention is made up of following ingredients, and content is as follows:
Tetrachloro three-iron 9～12(weight) %
Steel scale of steel rolling 55～60(weight) %
Pure aluminium powder 20～23(weight) %
Pure zirconium powder 10～11(weight) %
Titanium slag 1～5(weight) %
Sodium fluoride 0.1(weight) %
The tetrachloro three-iron is that reducing agent also is to promote catalyst for reaction, as greater than 12(weight) % then increases this fast welding flux cost, less than 9(weight) % underaction then; Steel scale of steel rolling is the waste material of steel rolling mill, comprising iron oxide, tri-iron tetroxide and ferrous oxide are arranged, is oxidant in this fast welding flux, is again filler after the fusing; Pure aluminium powder is the leading role of aluminothermic reduction agent, and a large amount of heats take place for aluminium and oxidant reaction,, make temperature reach 1700 ℃ (range estimations of light word pyrometer) thereby reach to make whole fast welding flux fusings and the purpose of filling; Zirconium powder also is a reducing agent, and it and oxidation are closed the back and generated zirconia, and zirconia can improve the slag come-up of high-temperature molten, improves welding quality; Titanium slag is that ferroalloy works smelt the waste residue that ferro-titanium produces, slag of its fused mass and gas come-up, improve the weldment quality, above steel scale of steel rolling is as less than 55(weight) %, oxidant deficiency then, and loading is not enough, as greater than 60(weight) % then reacts insufficient, do not reach the required high temperature of welding.The addition of pure zirconium powder and titanium slag also can not be less than 10(weight respectively) % and 1(weight) %, otherwise the repair welding quality is bad.Sodium fluoride is an ignitor.
The optimal components content of fast welding flux of the present invention is as follows:
Tetrachloro three-iron 10(weight) %
Steel scale of steel rolling 55(weight) %
Pure aluminium powder 20(weight) %
Pure zirconium powder 10(weight) %
Titanium slag 5(weight) %
Sodium fluoride 0.1(weight) %
The method for making of this fast welding flux is as follows: all raw materials are crushed to 80～100 orders respectively, and drying is mixed after being as cold as room temperature, sneaks into sodium fluoride when weldering again, fast welding flux of the present invention.
In use, survey the damage volume of accurate weldment, remove iron rust and foreign material earlier, sodium fluoride is added in the above mixture, the amount of sodium fluoride is the one thousandth of whole mixture, the fast welding flux of the present invention that then this is added sodium fluoride is put into damaged location with 9～10 times the volume that is equivalent to damage volume, building the dam with chamotte around the damaging part, lights with gas welding torch then, about 30 seconds, the blue light emersion is arranged, remove gas welding torch, after one minute, fierce chemical reaction takes place, this fast welding flux all is melted to damaging part, and slag and gas come-up are finished the welding purpose.Be incubated 10 minutes then, remove accumulated slag, will exceed the position with emery wheel and polish, can repair welding finish.
Below to analyzing and check in the welding position of fast welding flux of the present invention:
1) welding position chemical composition (weight) % is: C 0.2～0.5 Mn 0.64 Si 0.30 P 〉=0.030 S 〉=0.020 is equivalent to the mild steel or the medium carbon steel of high-quality;
2) Metallographic Analysis: 1.0 grades in carbide, 0.5 grade of oxide, crystal grain is evaluated greater than 1 grade (pressing YB-27-77), and it is organized as pearlite and ferrite;
3) mechanical performance: tensile strength is 10Kg/mm at 800 ℃, and linear expansion coefficient is 1.379 * 10 at 750 ℃;
4) generation doubly, fracture.
Low power is through 50% hydrochloric acid solution etch, and sour temperature is 80 ℃, etch 15 minutes, and assay is normal macrostructure;
Fracture: fractureing through disposable, is normal fracture;
Electron microscope observation is a cleavage fracture.
Fast welding flux of the present invention is applied to various ironcastings, defectives such as crackle, the erosion of the large-scale net ingot mould of the repairing of steel-casting, regeneration, particularly smelter, big base plate, trumpet (assembly) and circle side's slag ladle is anti-, broken hole.
Fast welding flux good welding performance of the present invention, filling capacity is good, shrinks for a short time, is difficult for cracking, and simple to operate, melting welding speed is fast.This fast welding flux can make useless part regeneration, makes various ironcastings and steel-casting improve the life-span 50%, therefore, can make the cost of steel per ton reduce by 1.3 yuan.As with 700,000 tons of calculating of the annual consumption of the used ingot mould in the whole nation, to regenerate by 25% repairing, ingot mould can consume 17.5 ten thousand tons a whole year less, can create imitating 8,000 ten thousand yuan.Therefore, fast welding flux of the present invention has very large economy benefit and social benefit.
Claims (2)
1, fast welding flux is characterized in that: said fast welding flux has following ingredients and content:
Tetrachloro three-iron 9～12 (weight) %
Steel scale of steel rolling 55～60 (weight) %
Pure aluminium powder 20～23 (weight) %
Pure zirconium powder 10～11 (weight) %
Titanium slag 1～5 (weight) %
Sodium fluoride 0.1 (weight) %
2, according to the said fast welding flux of claim 1, it is characterized in that: have following ingredients and content:
Tetrachloro three-iron 10(weight) %
Steel scale of steel rolling 55(weight) %
Pure aluminium powder 20(weight) %
Pure zirconium powder 10(weight) %
Titanium slag 5(weight) %
Sodium fluoride 0.1(weight) %
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106842 CN1014502B (en) | 1990-08-18 | 1990-08-18 | Fast welding flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106842 CN1014502B (en) | 1990-08-18 | 1990-08-18 | Fast welding flux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1048183A true CN1048183A (en) | 1991-01-02 |
| CN1014502B CN1014502B (en) | 1991-10-30 |
Family
ID=4880292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106842 Expired CN1014502B (en) | 1990-08-18 | 1990-08-18 | Fast welding flux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014502B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862926A (en) * | 2010-06-21 | 2010-10-20 | 西安理工大学 | Welding material for quickly welding and repairing defects of large-scale steel-casting and repairing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060698C (en) * | 1996-04-26 | 2001-01-17 | 清华大学 | Multifunctional equipment capable of fast completing various model making technique |
| CN1061279C (en) * | 1996-06-21 | 2001-01-31 | 李琎 | Method for producing Fe-Al or Fe-3Al metal meta-compound elements |
-
1990
- 1990-08-18 CN CN 90106842 patent/CN1014502B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862926A (en) * | 2010-06-21 | 2010-10-20 | 西安理工大学 | Welding material for quickly welding and repairing defects of large-scale steel-casting and repairing method |
| CN101862926B (en) * | 2010-06-21 | 2013-01-02 | 西安理工大学 | Welding material for quickly welding and repairing defects of large-scale steel-casting and repairing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1014502B (en) | 1991-10-30 |
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