CN104043913B - A kind of aluminothermy welding powder for novel grounded net materials welding - Google Patents
A kind of aluminothermy welding powder for novel grounded net materials welding Download PDFInfo
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- CN104043913B CN104043913B CN201410285452.9A CN201410285452A CN104043913B CN 104043913 B CN104043913 B CN 104043913B CN 201410285452 A CN201410285452 A CN 201410285452A CN 104043913 B CN104043913 B CN 104043913B
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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
- B23K35/22—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
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
-
- 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
- B23K23/00—Alumino-thermic welding
Abstract
The invention discloses a kind of aluminothermy welding powder for novel grounded net materials welding, formed by the material of following percentage by weight: cupric oxide 45-60%, aluminium powder 8-13%, copper powder 20-30%, copper-phosphorus alloy powder 5-15%, glass putty 1-5%, Fluorspar Powder 2-6%, borax powder 1-4%, surplus are alloy powder; Does is described alloy powder made up of the material of following percentage by weight: Ca? 8-12%, Si? 40-47%, Ba? 28-32%, all the other are impurity. Raw material of the present invention is cheap and easy to get, has solved aluminothermy welding powder welding and has easily produced the problems such as pore, slag inclusion, hot tearing, and quality of weld joint is reliable and reduced the link cost of novel grounded net materials, is conducive to the development of China's power engineering earthed system.
Description
Technical field
The invention belongs to technical field of welding materials, be specifically related to a kind of aluminothermy welding powder for novel grounded net materials welding.
Background technology
Along with the development of power system, the requirement to earthing or grounding means in power system is more and more stricter, and long-term, reliable, safe earthed system is basic assurance and the important measures of safeguarding power system stability operation, ensureing operations staff and electrical equipment safety. And the earthing material that the key that ensures earthed system long-term safety reliability service is quality better be connected reliably.
Copper is as earthing material, the advantage such as have that resistivity is little, good conductivity, earial drainage are fast, but exist near steel framework corrosion, acid ground, anti-anti-corrosive properties are poor, target protection causes the shortcomings such as puzzlement and contaminant water soil resource. And the Europe use such as German, Russian steel grounded screen many decades has been obtained good result.
The material that domestic conventional earthing or grounding means uses at present mainly contains galvanizing round steel and electro-coppering round steel. Galvanizing round steel is to be infiltrated after zinc-plated and make through cold drawn, pickling, high temperature by normal carbon steel wire rod, easily causes surperficial micro cell effect in use, has reduced to a great extent galvanizing round steel corrosion resistance, has shortened service life; In transport, construction easily by local failure (produce spot corrosion corrosion effect); In galvanizing round-bar pass manufacture process, be easy to cause the environmental pollution to air, water and soil. Copper facing round steel is after the pickling of carbon element round steel surface chemistry, to electroplate cathode copper manufacture to form, and will consume mass energy and also will produce many chemical waste fluids in its manufacturing process; Copper meeting contaminant water soil resource and cost are high; The damage of the electrodeposited coating that transport and installation process cause can cause steel core part and the surface electrical coating copper generation electrochemical reaction of copper facing round steel, accelerates the fracture of copper facing round steel.
In order to obtain higher electric conductivity, resistance to corrosion, and from the angle of environmental protection, the domestic various new grounded screen material of having developed successively. As China Electric Power Research Institute has developed novel corrosion resistant steel---stainless steel-clad-steel composite material. Stainless steel Baogang is made up of the special wire rod of Fine Steel Casting iron and special special stainless steel pipe two parts, forms with special technique and technology manufacture. The basic material of stainless steel Baogang is selected Fine Steel Casting iron, and the basic material of galvanizing round steel is common straightcarbon steel, and the physical property of Fine Steel Casting iron is better than that common straightcarbon steel, particularly resistivity of material are low, withstand shock is strong greatly. In addition stainless steel Baogang manufactures and all adopts physical technology, stops to adopt chemical technology, can not produce secondary pollution to atmosphere, water, soil. Meet Guo Wang company two types one completely and change the requirement of (environmentally friendly).
At present, the connected mode that grounded screen device adopts mainly contains electric welding, soldering, pressure welding, bolt, but these connected modes are all surface overlap joint, fills metal and mother metal and often can not fuse well, joint leakiness; Required welding equipment complexity, operating personnel are required high.
Aluminothermy welding is to produce the residue of liquid high-temperature copper liquid and aluminium oxide by the chemical reaction (exothermic reaction) of cupric oxide and aluminium, and utilizes the high temperature that exothermic reaction produces to realize the electric welding of high-performance, has been widely used in grounded screen device and has connected. But when existing aluminothermy welding powder welds novel grounded net materials, easily produce the defects such as pore, slag inclusion, hot tearing, external special welding powder quality of weld joint is reliable but cost is higher, and easily under one's control, and long-term use is unfavorable for the development of China's power engineering earthed system.
Summary of the invention
The object of the present invention is to provide the aluminothermy welding powder for novel grounded net materials welding that a kind of production cost is low, welding quality is good.
For achieving the above object, the present invention adopts following technical scheme:
For an aluminothermy welding powder for novel grounded net materials welding, formed by the material of following percentage by weight: cupric oxide 45-60%, aluminium powder 8-13%, copper powder 20-30%, copper-phosphorus alloy powder 5-15%, glass putty 1-5%, Fluorspar Powder 2-6%, borax powder 1-4%, surplus are alloy powder; Described alloy powder is made up of the material of following percentage by weight: Ca8-12%, Si40-47%, Ba28-32%, all the other are impurity.
Preferably, cupric oxide oxidizability≤85%, aluminium powder purity >=95%, copper powder purity >=99.5%, in copper-phosphorus alloy powder, phosphorus content is 10～18wt%, glass putty purity >=98.5%, Fluorspar Powder purity >=98.5%, borax powder purity >=95.0%.
The granularity of described cupric oxide, aluminium powder and copper powder is 30-200 order; The granularity of described copper-phosphorus alloy powder, glass putty, borax and alloy powder is 100-300 order; The granularity of described Fluorspar Powder is 100-200 order.
While utilizing above-mentioned aluminothermy welding powder welding grounded screen material, the weight ratio of aluminothermy welding powder and detonator is 70-95: 1.
Utilize conventional method to prepare above-mentioned aluminothermy welding powder, various material powders are mixed.
Raw material of the present invention is cheap and easy to get, has solved aluminothermy welding powder welding and has easily produced the problems such as pore, slag inclusion, hot tearing, and quality of weld joint is reliable and reduced the link cost of novel grounded net materials, is conducive to the development of China's power engineering earthed system.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further, but protection scope of the present invention is not limited in this.
Embodiment 1
For an aluminothermy welding powder for novel grounded net materials, formed by the material of following percentage by weight:
Wherein the oxidizability of cupric oxide is 85%, and granularity is 30 orders; Metallic aluminium powder purity >=98%, granularity is 200 orders; Purity >=99.5% of metallic copper powder, granularity is 200 orders; Copper-phosphorus alloy phosphorus content is 14%, and granularity is 100 orders; Metallic tin powder purity >=98.5%, granularity is 300 orders; Fluorspar Powder purity >=98.5%, granularity is 200 orders; Borax purity >=95%, granularity is 100 orders; Described alloy powder granularity >=300 order, wherein alloy powder component and weight fraction are respectively Ca:10%, Si:45%, Ba:30%, residue is impurity.
Embodiment 2
For an aluminothermy welding powder for novel grounded net materials, formed by the material of following percentage by weight:
Wherein the oxidizability of cupric oxide is 85%, and granularity is 200 orders; Metallic aluminium powder purity >=98%, granularity is 30 orders; Purity >=99.5% of metallic copper powder, granularity is 30 orders; Copper-phosphorus alloy phosphorus content >=14%, granularity is 300 orders; Metallic tin powder purity >=98.5%, granularity is 300 orders; Fluorspar Powder purity >=98.5%, granularity is 100 orders; Borax purity >=95%, granularity is 300 orders; Described alloy powder granularity is 100 orders, and wherein alloy powder component and weight fraction are respectively Ca:10%, Si:45%, Ba:30%, residue is impurity.
Embodiment 3
For an aluminothermy welding powder for novel grounded net materials, formed by the material of following percentage by weight:
Wherein the oxidizability of cupric oxide is 85%, and granularity is 150 orders; Metallic aluminium powder purity >=98%, granularity is 150 orders; Purity >=99.5% of metallic copper powder, granularity is 130 orders; Copper-phosphorus alloy phosphorus content is 14%, and granularity is 260 orders; Metallic tin powder purity >=98.5%, granularity is 280 orders; Fluorspar Powder purity >=98.5%, granularity is 1800 orders; Borax purity >=95%, granularity is 200 orders; Described alloy powder granularity is 200 orders, and wherein alloy powder component and weight fraction are respectively Ca:10%, Si:45%, Ba:30%, residue is impurity.
Embodiment 4
For an aluminothermy welding powder for novel grounded net materials, formed by the material of following percentage by weight:
Wherein the oxidizability of cupric oxide is 85%, and granularity is 100 orders; Metallic aluminium powder purity >=98%, granularity is 90 orders; Purity >=99.5% of metallic copper powder, granularity is 180 orders; Copper-phosphorus alloy phosphorus content is 14%, and granularity is 150 orders; Metallic tin powder purity >=98.5%, granularity is 250 orders; Fluorspar Powder purity >=98.5%, granularity is 160 orders; Borax purity >=95%, granularity is 230 orders; Described alloy powder granularity is 200 orders, and wherein alloy powder component and weight fraction are respectively Ca:10%, Si:45%, Ba:30%, residue is impurity.
Embodiment 5
For an aluminothermy welding powder for novel grounded net materials, formed by the material of following percentage by weight:
Wherein the oxidizability of cupric oxide is 80%, and granularity is 100 orders; Metallic aluminium powder purity >=95%, granularity is 190 orders; Purity >=99.5% of metallic copper powder, granularity is 180 orders; Copper-phosphorus alloy phosphorus content is 18%, and granularity is 150 orders; Metallic tin powder purity >=98.5%, granularity is 250 orders; Fluorspar Powder purity >=98.5%, granularity is 160 orders; Borax purity >=95%, granularity is 230 orders; Described alloy powder granularity is 200 orders, and wherein alloy powder component and weight fraction are respectively Ca:10%, Si:45%, Ba:30%, residue is impurity.
Embodiment 6
For an aluminothermy welding powder for novel grounded net materials, formed by the material of following percentage by weight:
Wherein the oxidizability of cupric oxide is 80%, and granularity is 150 orders; Metallic aluminium powder purity >=95%, granularity is 190 orders; Purity >=99.5% of metallic copper powder, granularity is 180 orders; Copper-phosphorus alloy phosphorus content is 10%, and granularity is 150 orders; Metallic tin powder purity >=98.5%, granularity is 200 orders; Fluorspar Powder purity >=98.5%, granularity is 160 orders; Borax purity >=95%, granularity is 260 orders; Described alloy powder granularity is 200 orders, and wherein alloy powder component and weight fraction are respectively Ca:10%, Si:45%, Ba:30%, residue is impurity.
Utilize the quality of the aluminothermy welding powder soldering stainless steel Baogang joint that embodiment 1-6 makes as shown in table 1 below: (wherein the weight ratio of aluminothermy welding powder and detonator is 85: 1)
Table 1
Result proves that aluminothermy welding powder of the present invention preferably resolves the welding of aluminothermy welding powder and easily produces the problems such as pore, slag inclusion, hot tearing, and quality of weld joint is reliable.
Claims (10)
1. the aluminothermy welding powder for novel grounded net materials welding, it is characterized in that, formed by the material of following percentage by weight: cupric oxide 45-60%, aluminium powder 8-13%, copper powder 20-30%, copper-phosphorus alloy powder 5-15%, glass putty 1-5%, Fluorspar Powder 2-6%, borax powder 1-4%, surplus are alloy powder;
In described copper-phosphorus alloy powder, phosphorus content is 10～18wt%,
Described alloy powder is made up of the material of following percentage by weight: Ca8-12%, Si40-47%, Ba28-32%, all the other are impurity.
2. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 1, is characterized in that: cupric oxide oxidizability≤85%, aluminium powder purity >=95%, copper powder purity >=99.5%, glass putty purity >=98.5%, Fluorspar Powder purity >=98.5%, borax powder purity >=95.0%.
3. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 2, is characterized in that: the granularity of described cupric oxide, aluminium powder and copper powder is 30-200 order; The granularity of described copper-phosphorus alloy powder, glass putty, borax and alloy powder is 100-300 order; The granularity of described Fluorspar Powder is 100-200 order.
4. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 2, is characterized in that:
Cupric oxide 45%, aluminium powder 8%, copper powder 28%, copper-phosphorus alloy powder 12%, glass putty 1%, Fluorspar Powder 2%, borax powder 2%, alloy powder 2%.
5. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 2, is characterized in that:
Cupric oxide 50%, aluminium powder 10%, copper powder 23%, copper-phosphorus alloy powder 10%, glass putty 2%, Fluorspar Powder 3%, borax powder 1%, alloy powder 1%.
6. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 2, is characterized in that:
Cupric oxide 55%, aluminium powder 12%, copper powder 20%, copper-phosphorus alloy powder 8%, glass putty 1%, Fluorspar Powder 2%, borax powder 1%, alloy powder 1%.
7. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 2, is characterized in that:
Cupric oxide 49%, aluminium powder 9%, copper powder 20%, copper-phosphorus alloy powder 16%, glass putty 2%, Fluorspar Powder 2%, borax powder 1%, alloy powder 1%.
8. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 2, is characterized in that:
Cupric oxide 60%, aluminium powder 8%, copper powder 20%, copper-phosphorus alloy powder 5%, glass putty 2%, Fluorspar Powder 2%, borax powder 1%, alloy powder 2%.
9. the aluminothermy welding powder for novel grounded net materials welding as claimed in claim 2, is characterized in that:
Cupric oxide 45%, aluminium powder 13%, copper powder 20%, copper-phosphorus alloy powder 6%, glass putty 5%, Fluorspar Powder 6%, borax powder 4%, alloy powder 1%.
10. utilize the arbitrary described aluminothermy welding powder welding of claim 1-9 grounded screen material, it is characterized in that: the weight ratio of described aluminothermy welding powder and detonator is 70-95: 1.
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| CN104043913B true CN104043913B (en) | 2016-05-25 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439756B (en) * | 2014-12-29 | 2016-03-30 | 湖南天佑科技有限公司 | A kind of passive from lotion growing high hot automatic welding carbon steel metalloid and preparation method thereof and using method |
| CN106141499A (en) * | 2016-08-05 | 2016-11-23 | 雷春生 | A kind of grounding grid heat release welding preparation method of ultra-fine welding powder |
| CN106271216A (en) * | 2016-08-31 | 2017-01-04 | 邓柳平 | A kind of nonhygroscopic welding powder and preparation method thereof |
| CN107020448B (en) * | 2017-03-08 | 2019-04-16 | 宁波高新区远创科技有限公司 | A kind of preparation method of grounded screen exothermic weld welding powder |
| CN107671452B (en) * | 2017-08-31 | 2019-07-23 | 嘉兴嘉合电力设备有限公司 | Heat release welding powder |
| CN108326466B (en) * | 2018-02-07 | 2020-02-14 | 郑州机械研究所有限公司 | High-conductivity aluminum hot welding powder |
| CN109759746B (en) * | 2019-03-05 | 2021-07-02 | 郑州机械研究所有限公司 | High-corrosion-resistance aluminum hot welding powder for stainless steel ladle grounding grid |
| CN112570929A (en) * | 2019-09-29 | 2021-03-30 | 金华三合新材料有限公司 | Aluminothermic welding powder and preparation method thereof |
| CN110814577A (en) * | 2019-11-16 | 2020-02-21 | 国网河南省电力公司电力科学研究院 | Exothermic fusion brazing welding powder suitable for copper-clad steel grounding grid in dry-wet alternating environment |
| CN111843294B (en) * | 2019-11-18 | 2022-03-01 | 国网河南省电力公司电力科学研究院 | Stainless steel ladle steel grounding grid welding powder suitable for dry-wet alternative environment |
| CN112077481A (en) * | 2020-08-27 | 2020-12-15 | 北京市金合益科技发展有限公司 | Formula of welding powder for welding flat-belt type copper-coated steel grounding body |
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| CN101412167A (en) * | 2008-11-28 | 2009-04-22 | 中国电力科学研究院 | Thermofusion welding agent for welding copper covered steel grounded screen |
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Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: State Grid Corporation of China Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: ZHENGZHOU Research Institute OF MECHANICAL ENGINEERING Patentee after: Henan jiuyu enpai Power Technology Co.,Ltd. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee before: ZHENGZHOU Research Institute OF MECHANICAL ENGINEERING Patentee before: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. |