CN110369905A - A kind of aluminium hinge line efficiently connects dedicated welding powder - Google Patents
A kind of aluminium hinge line efficiently connects dedicated welding powder Download PDFInfo
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- CN110369905A CN110369905A CN201910560392.XA CN201910560392A CN110369905A CN 110369905 A CN110369905 A CN 110369905A CN 201910560392 A CN201910560392 A CN 201910560392A CN 110369905 A CN110369905 A CN 110369905A
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
- B23K35/288—Al as the principal constituent with Sn or Zn
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The present invention relates to a kind of aluminium hinge lines efficiently to connect dedicated welding powder, the welding powder by following weight percent material composition: aluminium 65%-68%, tin oxide 30%~35%, tin 0.8%~1.2%, iron 0.4%~0.6%, carbon 0.1%~0.3%, rare earth 0.1%~0.3%, silver-colored 0.1%~0.2%, borax 1%~2%；Surplus is alloy powder；The alloy powder by following weight percent material composition: calcium 8-12%, silicon 40-47%, barium 28-32%, remaining be mixed-powder；Contain borax in welding powder of the present invention, borax is by thermal decomposition boric anhydride and kodalk: and kodalk can form the lower complex chemical compound of fusion temperature with tin oxide: these complex chemical compounds are easy to float to molten aluminum surface as slag, improve the mobility of molten aluminum.
Description
Technical field
The invention belongs to new material technology fields, and in particular to a kind of aluminium hinge line efficiently connects dedicated welding powder.
Background technique
Aluminum stranded conductor is a kind of common power transmission cable, in prolonged outdoor use process, is easy to appear breakage.It is necessary
When just need to repair it, to restore its performance, extend the transmission line of electricity replacement cycle, solve fund.In the prior art, general
All over being repaired using the mode of aluminum weld to aluminum stranded conductor；And aluminum weld is a kind of two multiple conductors or more
The welding procedure that a conductor welds, this technique passes through the chemical reaction (exothermic reaction) of copper oxide and aluminium, and utilizes heat release
Generated high temperature is reacted to realize the electrical welding of high-performance, is widely used to aluminium hinge line connection.But existing aluminothermy welding powder weldering
The defects of being easy to produce stomata, slag inclusion, hot tearing when connecing aluminium hinge wire material, external special welding powder quality of weld joint is reliable but cost
It is higher and easily under one's control, the development for being unfavorable for China's power engineering earthed system is used for a long time.
In view of the above technical problems, it therefore needs to improve.
Summary of the invention
The present invention be in order to overcome above-mentioned defect in the prior art, provide a kind of production cost it is low, guarantee welding quality,
And the stable aluminium hinge line of reaction process efficiently connects dedicated welding powder.
In order to reach the goals above, the technical scheme adopted by the invention is that: a kind of aluminium hinge line efficiently connects dedicated welding powder,
The welding powder by following weight percent material composition: aluminium 65%-68%, tin oxide 30%~35%, tin 0.8%~
1.2%, iron 0.4%~0.6%, carbon 0.1%~0.3%, rare earth 0.1%~0.3%, silver 0.1%~0.2%, borax 1%~
2%；Surplus is alloy powder；The alloy powder by following weight percent material composition: calcium 8-12%, silicon 40-47%,
Barium 28-32%, remaining be mixed-powder.
As a kind of preferred embodiment of the invention, the aluminium powder is sheet atomizing aluminium powder, and granularity is 40~60 mesh.
As a kind of preferred embodiment of the invention, the mixed-powder includes iron powder, Fluorspar Powder, ferrosilicon powder, silica
The mixed-powder of powder, wherein 1~1.5 part of iron powder, 0.5~1.5 part of fluorite powder, 0.3~0.5 part of ferrosilicon powder, silica
0.5~1 part, granularity is 100~200 mesh.
As a kind of preferred embodiment of the invention, the mixed-powder further includes 3~5 parts of slag former and adhesive 1~3
Part.
As a kind of preferred embodiment of the invention, the welding powder is grouped as by each group of following weight percent: aluminium 65%,
Tin oxide 30%, tin 1%, iron 0.4%, carbon 0.2%, rare earth 0.2%, silver-colored 0.2%, borax 2%.
As a kind of preferred embodiment of the invention, the alloy powder is grouped as by each group of following weight percent: calcium
10%, silicon 45%, barium 30%.
As a kind of preferred embodiment of the invention, the mixed-powder is according to parts by weight by following material composition: iron powder 1
Part, 1.5 parts of fluorite powder, 0.5 part of ferrosilicon powder, silica 1 part, 3 parts of slag former and 2 parts of adhesive.
As a kind of preferred embodiment of the invention, aluminium powder purity >=95%, glass putty purity >=97.5%, iron powder purity >=
97.5%, borax powder purity >=96.0%.
As a kind of preferred embodiment of the invention, the slag former is fluorite powder.
As a kind of preferred embodiment of the invention, the mixed-powder further includes 2~3 parts of silver nitrate.
Welding powder of the invention includes aluminium powder, putty powder, iron powder, carbon dust, rare earth powder, silver powder and borax powder；Before welding, aluminium
Powder, putty powder and binder shift to an earlier date melting mixing；When welding, borax is contained in welding powder of the present invention, borax is thermally decomposed
Boric anhydride and kodalk: and kodalk can form the lower complex chemical compound of fusion temperature: these Composites with tin oxide
It closes object and is easy to float to molten aluminum surface as slag, improve the mobility of molten aluminum, accelerate the displacement reaction rate of heat release welding powder,
The mixing of each raw material is also more uniform simultaneously, and after cooling, bonding strength is good, and surface is smooth, and weldment quality is stablized.
It should be noted that the physico-chemical property according to different elements of welding powder of the present invention, has fully considered microelement
Scaling loss is lost, it is ensured that aluminium cuts with scissors the efficient connecting portion of the line ingredient same or similar with matrix；The welding powder reacting balance, safety
Height, and reparation speed is fast, it is high-efficient.
It joined 0.1%~0.3% carbon in welding powder of the invention, carbon divides two states to be present in material, a kind of
It is to be solid-solution in matrix, one is metal carbides are formed, due to there is the addition of boron in this material, actually forms metal carbon
Boron compound.
It joined the element silicon of 40-47% in alloy powder in welding powder of the invention, the function of silicon is to optimize powder
Atomization process performance, improve yield rate, reduce oxidation of the alloy powder in spraying process.
Aluminium in welding powder is chemically reacted as reducing agent and tin oxide, generates heat.Tin main function in welding powder
For the mobility for increasing molten metal, the intensity of reinforced metal weld seam reduces reaction temperature.Silver in welding powder has excellent heat conductivity
Effect, to guarantee that connector has good conductive capability.Rare earth in welding powder has the effect of refining crystal grain, to realize reinforcing
The effect of alloy, improves the fusing point of solid solution in alloy, and the addition of rare earth affects the oxidation behavior of welding powder, changes welding powder
Oxidation thermodynamics and dynamic behavior, enhance the compactness of tin oxide, reduce the oxidation rate of welding powder, extend welding powder
The quality guarantee time can make strength of joint/hardness/resultant forces such as elongation/fracture toughness and wear-resisting property to improve burning point
Performance is learned to improve.
Slag former is, for example, fluorite powder, and fluorite powder, which plays the role of helping in the reaction, to be melted slag making, eliminates stomata.
The beneficial effects of the present invention are:
1. containing borax in welding powder of the present invention, borax is by thermal decomposition boric anhydride and kodalk: and kodalk energy
Form the lower complex chemical compound of fusion temperature with tin oxide: these complex chemical compounds are easy to float to molten aluminum surface as slag,
Improve the mobility of molten aluminum；
2. in welding powder of the present invention borax on the one hand be conducive to the flowing of molten metal, while can protect face of weld be not easy by
Oxidation, the BO that another side borax pyrolytic obtains can combine with CaF is used as diluent and slag former；
3. the present invention uses aluminium powder, aluminium powder oxygen content and impurity content are greatly reduced, improve the quality of aluminium powder and is connect
Head conductivity, and reduce costs；Silver powder is added and accelerates reacting for aluminium powder and tin oxide；It is obtained using welding powder of the present invention
It is high to obtain connector conductivity, stomata, slag inclusion are few, and crystal grain refinement is uniform, and quality of weld joint is reliable and stable；Reduce environmental pollution.
Specific embodiment
Below by specific embodiment the technical scheme of the present invention will be further described explanation.
If raw material employed in the embodiment of the present invention is raw material commonly used in the art without specified otherwise, implement
Method employed in example, is the conventional method of this field.
Embodiment 1:
A kind of aluminium hinge line efficiently connects dedicated welding powder, and welding powder is grouped as by each group of following weight percent: aluminium 65%, oxygen
Change tin 30%, tin 1%, iron 0.4%, carbon 0.2%, rare earth 0.2%, silver-colored 0.2%, borax 2%；Alloy powder is by following weight hundred
The each group of ratio is divided to be grouped as: calcium 10%, silicon 45%, barium 30%.
Mixed-powder is according to parts by weight by following material composition: 1 part of iron powder, 1.5 parts of fluorite powder, 0.5 part of ferrosilicon powder,
Silica 1 part, 3 parts of slag former and 2 parts of adhesive.
Slag former is fluorite powder, and aluminium powder is sheet atomizing aluminium powder, and granularity is 40~60 mesh.
Layer hardness is 205HB.
Embodiment 2:
A kind of aluminium hinge line efficiently connects dedicated welding powder, and welding powder is grouped as by each group of following weight percent: aluminium 66.4%,
Tin oxide 31%, tin 0.8%, iron 0.5%, carbon 0.1%, rare earth 0.1%, silver-colored 0.1%, borax 1%；Alloy powder is by following heavy
The each group of amount percentage is grouped as: calcium 12%, silicon 46%, barium 31%.
Mixed-powder is according to parts by weight by following material composition: 1.2 parts of iron powder, 1 part of fluorite powder, 0.4 part of ferrosilicon powder,
0.8 part of silica, 4 parts of slag former and 3 parts of adhesive.
Layer hardness is 208.8HB.
Embodiment 3:
A kind of aluminium hinge line efficiently connects dedicated welding powder, and welding powder is grouped as by each group of following weight percent: aluminium 67.4%,
Tin oxide 30%, tin 0.9%, iron 0.4%, carbon 0.1%, rare earth 0.1%, silver-colored 0.1%, borax 1%；Alloy powder is by following heavy
The each group of amount percentage is grouped as: calcium 8%, silicon 42%, barium 29%.
Mixed-powder is according to parts by weight by following material composition: 1.5 parts of iron powder, 1.2 parts of fluorite powder, ferrosilicon powder 0.4
Part, 0.9 part of silica, 3 parts of slag former and 1 part of adhesive.
The present invention carries out built-up welding to welding machine using the DML-V02B plasma powder of Shanghai Duo Mu Industrial Co., Ltd. production；
Built-up welding matrix is 40Cr, and output electric current is 95A, powder sending quantity 15g/min, single-run welding slit width 10mm, and welding gun speed is 1mm/s,
Carry out full and uniform be stirred.
Layer hardness is 210.7HB.
Embodiment 4:
The present embodiment content and 1 content of embodiment are essentially identical, and same section content is not repeating, different from embodiment 1
: in the present embodiment:
Welding powder is grouped as by each group of following weight percent: aluminium 67.4%, tin oxide 29.7%, tin 0.9%, iron
0.4%, carbon 0.1%, rare earth 0.1%, silver-colored 0.1%, borax 1.3%；Alloy powder is grouped by each group of following weight percent
At: calcium 8%, silicon 42%, barium 29%.
Mixed-powder is according to parts by weight by following material composition: 1.5 parts of iron powder, 1.2 parts of fluorite powder, ferrosilicon powder 0.4
Part, 0.9 part of silica, 3 parts of slag former and 1 part of adhesive.
As different from Example 3, the weight percent of borax is adjusted to 1.3% by 1% in this programme, tin oxide
Weight percent is adjusted to 29.7% by 30%, it has been found that being conducive to after adjusting above two weight percentages of components
The flowing of molten metal, while can protect face of weld and being not easy to be oxidized, it can preferably improve mobility.
Embodiment 5:
The present embodiment content and 1 content of embodiment are essentially identical, and same section content is not repeating, different from embodiment 1
: in the present embodiment:
Welding powder is grouped as by each group of following weight percent: aluminium 67.4%, tin oxide 29.7%, tin 0.9%, iron
0.4%, carbon 0.1%, rare earth 0.1%, silver-colored 0.1%, borax 1.3%；Alloy powder is grouped by each group of following weight percent
At: calcium 8%, silicon 42%, barium 29%.
Mixed-powder is according to parts by weight by following material composition: 1.5 parts of iron powder, 1.2 parts of fluorite powder, ferrosilicon powder 0.4
Part, 0.9 part of silica, 3 parts of slag former, 1 part of adhesive and 2 parts of silver nitrate.
As different from Example 4,2 parts of silver nitrate are added in mixed-powder in this programme, weld strength improves 2.5-
3%；Meanwhile, it is capable to each component is promoted to merge, reacting for aluminium powder and tin oxide is accelerated；It is high that welding powder obtains connector conductivity.
Embodiment 6:
The present embodiment content and 1 content of embodiment are essentially identical, and same section content is not repeating, different from embodiment 1
: in the present embodiment:
Welding powder is grouped as by each group of following weight percent: aluminium 67.4%, tin oxide 29.6%, tin 0.9%, iron
0.4%, carbon 0.1%, rare earth 0.2%, silver-colored 0.1%, borax 1.3%；Alloy powder is grouped by each group of following weight percent
At: calcium 8%, silicon 42%, barium 29%.
Mixed-powder is according to parts by weight by following material composition: 1.5 parts of iron powder, 1.2 parts of fluorite powder, ferrosilicon powder 0.4
Part, 0.9 part of silica, 3 parts of slag former, 1 part of adhesive and 2 parts of silver nitrate.
As different from Example 4, the weight percent of rare earth is adjusted to 0.2% by 0.1% in this programme, tin oxide
Weight percent be adjusted to 29.6% by 29.7%, it has been found that after adjusting above two weight percentages of components, weldering
It connects intensity and improves 0.1-0.3%；The oxidation thermodynamics and dynamic behavior for changing welding powder, enhance the compactness of tin oxide,
The oxidation rate for reducing welding powder extends the quality guarantee time of welding powder.
Embodiment 6:
The present embodiment content and 1 content of embodiment are essentially identical, and same section content is not repeating, different from embodiment 1
: in the present embodiment:
Welding powder is grouped as by each group of following weight percent: aluminium 67.4%, tin oxide 29.6%, tin 0.9%, iron
0.4%, carbon 0.2%, rare earth 0.2%, silver-colored 0.1%, borax 1.2%；Alloy powder is grouped by each group of following weight percent
At: calcium 8%, silicon 42%, barium 29%.
Mixed-powder is according to parts by weight by following material composition: 1.5 parts of iron powder, 1.2 parts of fluorite powder, ferrosilicon powder 0.4
Part, 0.9 part of silica, 3 parts of slag former, 1 part of adhesive and 2 parts of silver nitrate.
As different from Example 5, the weight percent of carbon is adjusted to 0.2% by 0.1% in this programme, the weight of borax
It measures percentage and is adjusted to 1.2% by 1.3%, it has been found that after adjusting above two weight percentages of components, so that borax
Metal carbon-boron compound is formd with carbon, improves the mobility of molten aluminum.
Embodiment 7:
The present embodiment content and 1 content of embodiment are essentially identical, and same section content is not repeating, different from embodiment 1
: in the present embodiment:
Welding powder is grouped as by each group of following weight percent: aluminium 67.4%, tin oxide 29.6%, tin 0.9%, iron
0.4%, carbon 0.2%, rare earth 0.2%, silver-colored 0.1%, borax 1.2%；Alloy powder is grouped by each group of following weight percent
At: calcium 8%, silicon 42%, barium 29%.
Mixed-powder is according to parts by weight by following material composition: 1.5 parts of iron powder, 1.2 parts of fluorite powder, ferrosilicon powder 0.5
Part, 0.9 part of silica, 3 parts of slag former, 1 part of adhesive and 2 parts of silver nitrate.
As different from Example 5, the parts by weight of ferrosilicon powder are adjusted to 0.5 part by 0.4 part in this programme, applicant
It was found that oxidation of the alloy powder in spraying process can be effectively reduced after adjusting a kind of above-mentioned weight percentages of components.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention；Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of aluminium hinge line efficiently connects dedicated welding powder, it is characterised in that: the welding powder by following weight percent substance group
At: aluminium 65%-68%, tin oxide 30%~35%, tin 0.8%~1.2%, iron 0.4%~0.6%, carbon 0.1%~0.3%,
Rare earth 0.1%~0.3%, silver-colored 0.1%~0.2%, borax 1%~2%；Surplus is alloy powder；The alloy powder by with
The material composition of lower weight percent: calcium 8-12%, silicon 40-47%, barium 28-32%, remaining be mixed-powder.
2. a kind of aluminium hinge line according to claim 1 efficiently connects dedicated welding powder, it is characterised in that: the aluminium powder is sheet
Atomizing aluminium powder, granularity are 40~60 mesh.
3. a kind of aluminium hinge line according to claim 1 efficiently connects dedicated welding powder, it is characterised in that: the mixed-powder packet
The mixed-powder of iron powder, Fluorspar Powder, ferrosilicon powder, SiO 2 powder is included, wherein 1~1.5 part of iron powder, fluorite powder 0.5~1.5
Part, 0.3~0.5 part of ferrosilicon powder, 0.5~1 part of silica, granularity are 100~200 mesh.
4. a kind of aluminium hinge line according to claim 3 efficiently connects dedicated welding powder, it is characterised in that: the mixed-powder is also
Including 3~5 parts and 1~3 part of adhesive of slag former.
5. a kind of aluminium hinge line according to claim 1 efficiently connects dedicated welding powder, it is characterised in that: the welding powder is by following
The each group of weight percent is grouped as: aluminium 65%, tin oxide 30%, tin 1%, iron 0.4%, carbon 0.2%, rare earth 0.2%, silver
0.2%, borax 2%.
6. a kind of aluminium hinge line according to claim 1 efficiently connects dedicated welding powder, it is characterised in that: the alloy powder by
The each group of following weight percent is grouped as: calcium 10%, silicon 45%, barium 30%.
7. a kind of aluminium hinge line according to claim 4 efficiently connects dedicated welding powder, it is characterised in that: the mixed-powder is pressed
Parts by weight meter is by following material composition: 1 part of iron powder, 1.5 parts of fluorite powder, 0.5 part of ferrosilicon powder, silica 1 part, slag former
3 parts and 2 parts of adhesive.
8. a kind of aluminium hinge line according to claim 1 efficiently connects dedicated welding powder, it is characterised in that: aluminium powder purity >=
95%, glass putty purity >=97.5%, iron powder purity >=97.5%, borax powder purity >=96.0%.
9. a kind of aluminium hinge line according to claim 4 efficiently connects dedicated welding powder, it is characterised in that: the slag former is firefly
Stone powder.
10. a kind of aluminium hinge line according to claim 7 efficiently connects dedicated welding powder, it is characterised in that: the mixed-powder
It further include 2~3 parts of silver nitrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910560392.XA CN110369905B (en) | 2019-06-26 | 2019-06-26 | Special welding powder for efficient connection of aluminum stranded wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910560392.XA CN110369905B (en) | 2019-06-26 | 2019-06-26 | Special welding powder for efficient connection of aluminum stranded wire |
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| CN110369905A true CN110369905A (en) | 2019-10-25 |
| CN110369905B CN110369905B (en) | 2021-07-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0947284A1 (en) * | 1998-04-03 | 1999-10-06 | Erico International Corporation | Aluminum welding process and composition for use in same |
| CN102848101A (en) * | 2012-10-16 | 2013-01-02 | 重庆理工大学 | Bi-component powder thermit for resistance welding of aluminum alloy |
| CN102990222A (en) * | 2012-11-16 | 2013-03-27 | 中国铝业股份有限公司 | Electrolytic tank aluminum bus and soft tape electric heat-release welding method |
| CN107671452A (en) * | 2017-08-31 | 2018-02-09 | 嘉兴嘉合电力设备有限公司 | Heat release welding powder |
| CN108326466A (en) * | 2018-02-07 | 2018-07-27 | 郑州机械研究所有限公司 | A kind of highly conductive aluminothermy welding powder |
-
2019
- 2019-06-26 CN CN201910560392.XA patent/CN110369905B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0947284A1 (en) * | 1998-04-03 | 1999-10-06 | Erico International Corporation | Aluminum welding process and composition for use in same |
| CN102848101A (en) * | 2012-10-16 | 2013-01-02 | 重庆理工大学 | Bi-component powder thermit for resistance welding of aluminum alloy |
| CN102990222A (en) * | 2012-11-16 | 2013-03-27 | 中国铝业股份有限公司 | Electrolytic tank aluminum bus and soft tape electric heat-release welding method |
| CN107671452A (en) * | 2017-08-31 | 2018-02-09 | 嘉兴嘉合电力设备有限公司 | Heat release welding powder |
| CN108326466A (en) * | 2018-02-07 | 2018-07-27 | 郑州机械研究所有限公司 | A kind of highly conductive aluminothermy welding powder |
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