CN101347868B - Aluminothermy welding method of aluminium alloy - Google Patents
Aluminothermy welding method of aluminium alloy Download PDFInfo
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- CN101347868B CN101347868B CN2008100218716A CN200810021871A CN101347868B CN 101347868 B CN101347868 B CN 101347868B CN 2008100218716 A CN2008100218716 A CN 2008100218716A CN 200810021871 A CN200810021871 A CN 200810021871A CN 101347868 B CN101347868 B CN 101347868B
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Abstract
The invention relates to a thermit welding method of aluminium alloy, which comprises the following steps: preparing a thermit welding agent; placing the thermit welding agent in a crucible; embedding a TiC igniter into the thermit welding agent; exposing a part; igniting the exposed part; igniting the thermit welding agent in the crucible for thermit reaction; placing the solid aluminium alloy into the surface of reactants in the crucible immediately after the reaction is finished; using the residual heat to melt the solid aluminium alloy and obtaining the liquid aluminium alloy melt; preheating fractures of the aluminium alloy parts to be welded to the temperature of 390-410 DEG C when the former step is carried out; directly casting the aluminium alloy melt to the position of the fracture of the processed aluminium alloy parts; carrying out the densification processing by striking and extruding the welding seam when the metal to be seamed is just solidified and realizing the welding; and clearing weld flash by hands when the temperature is high. The thermit welding method of the invention is applicable to emergent and fast welding and repairing of aluminium alloy armor plates and aluminium alloy parts of armored equipment in battlefields and is also applicable to emergent welding and repairing of aluminium alloy parts of civilian vehicles or other machines in field working.
Description
Technical field
The present invention relates to a kind of aluminium alloy from spreading fast welding method, mainly be applicable to armored equipment aluminium alloy deck and part battlefield emergency REPAIR WELDING.Belong to the aluminothermy welding technology field.
Background technology:
Because that aluminium alloy has is in light weight, intensity is high, advantage such as corrosion-resistant, armour plate and most of part of air-drop armored equipment and water and land amphibious armoured equipment are made with aluminium alloy.The repairing of armored equipment aluminum alloy part battlefield emergency is the effective means that keeps armored equipment battlefield survival rate and the power of regeneration of improving its combat capabilities.REPAIR WELDING to slight war wound aluminum alloy part on the battlefield is very important a kind of restorative procedure.Traditional aluminum alloy solder technology has a variety of, but has following three problems: the one, and welding rod and matrix are not same material, and the performance of expanding with heat and contract with cold between weld seam and matrix material is incomplete same, and when the temperature fusion, weld seam produces stress, influences weld strength; The 2nd, need welding equipment and electric equal energy source, and the armored equipment under the field condition does not carry not only with the car electric welding equipment, does not have power supply and gas bomb yet, traditional welding method can not satisfy the battlefield needs of repairing fast; The 3rd, weld metal mostly is free crystallization, and seam organization and density are not very high.Press for and a kind ofly need not electricity, be applicable to the technology of the rapid welding of aluminum alloy part under without gas and the simple condition of equipment, to solve the emergent welding repairing difficult problem of field condition bottom plating equipment aluminum alloy armor plate and aluminum alloy part.
Summary of the invention
The objective of the invention is at above-mentioned three problems, provide a cover suitable aluminothermy welding method of aluminium alloy.
The object of the present invention is achieved like this: a kind of aluminothermy welding method of aluminium alloy, its basic technology route is: aluminum heat flux ignites in crucible, after treating that thermit reaction finishes, the solid aluminium alloy is added in the crucible, utilize the delayed heat melting solid aluminium alloy of thermit reaction product to generate aluminium alloy melt, aluminium alloy melt is poured into treats the weldment fracture with the preheating of thermit reaction product, pressurization makes it densified in the aluminium liquid process of setting of commissure, thereby realize the aluminothermy welding of aluminium alloy, obtain weld seam and matrix fast and be same material and be the good quality solder joints of large deformation tissue.Specifically comprise following processing step:
A kind of aluminothermy welding method of aluminium alloy is characterized in that: it comprises following processing step:
(1) preparation aluminum heat flux;
(2) aluminum heat flux is placed in the crucible;
(3) the TiC igniting agent is imbedded in the aluminum heat flux, part exposes, and lights exposed parts, and the aluminum heat flux in the crucible that ignites causes thermit reaction;
When (4) question response finishes, immediately the solid aluminium alloy is put into the reaction-ure surface of crucible, utilized waste heat to make its fusing, get the liquid aluminium alloy melt;
(5) when carrying out step (4), aluminum alloy part fracture to be welded is preheated to 400 ℃ ± 10 ℃ with the thermit reaction product;
(6) aluminium alloy melt directly is poured into the aluminum alloy part incision position of having handled well, carries out densification by knocking the extruding weld seam when treating that the weld seam metal has just solidified, realize welding;
(7) take advantage of high temperature, the manual cleanup overlap.
Described aluminum heat flux contains 20%, granularity is 20-30 purpose aluminium powder and contain granularity less than 100 orders, phosphorus content less than 0.5% iron oxide 55-60%.
The exothermic welding connection technology is a kind of solder technology that is adapted to open-air repairing, and it is gentle to be characterized in need not electricity consumption, and equipment is simple, portable convenience, dependable performance, and the individual soldier can operate.The present invention can be used for armored equipment aluminum alloy armor plate and the reparation of aluminum alloy part battlefield emergency rapid welding.
Description of drawings
Fig. 1 is the aluminothermy welding schematic diagram of the axial workpiece that the present invention relates to.
The A-A cut-away view of Fig. 2 Fig. 1.
The specific embodiment
One, aluminium alloy aluminothermy welding embodiment:
With rapid welding off-axis test specimen under the field condition is example, illustrates that processing step is as follows:
(1) according to the size shape of off-axis with the on-the-spot quick Fabrication of lightweight refracrory weld mold as shown in Figure 1, remove dirts such as incision position earth, with the part to be welded mould of packing into, leave the 5mm gap between fracture;
(2) aluminum heat flux is placed in as shown in Figure 1 the crucible; The TiC igniting agent is imbedded in the aluminum heat flux, and part exposes, and lights exposed parts, and the interior aluminum heat flux of crucible is used to ignite; When treating that the aluminum heat flux thermit reaction finishes, the solid aluminium alloy is put into reaction-ure surface make its fusing, get the liquid aluminium alloy melt;
(3) when carrying out step (2), by as shown in Figure 2, light the aluminum heat flux that is used for preheating after, the molten iron that thermit reaction generates flows to the fracture bottom under the effect of gravity, fracture is preheated to 400 ℃ ± 10 ℃;
(4) as shown in Figure 1, cast aluminum liquid makes it be full of the incision position gap.Treat axially to knock when aluminium liquid has just solidified pressurization.
(5) form removal.Remove knurl while hot by hand with the pincers worker flat chisel, finishing off-axis surface.
Two, igniting agent and igniter
Igniting agent: granularity is all 200 purpose Ti powder and the C powder is preparation in 1: 1, mixing by atomic ratio.Partly imbed during use in the aluminum heat flux, part exposes, and covers crucible cover rapidly after lighting exposed parts.
Igniter: windproof lighter.
Claims (2)
1. aluminothermy welding method of aluminium alloy, it is characterized in that: it comprises following processing step:
(1) preparation aluminum heat flux;
(2) aluminum heat flux is placed in the crucible;
(3) the TiC igniting agent is imbedded in the aluminum heat flux, part exposes, and lights exposed parts, and the aluminum heat flux in the crucible that ignites causes thermit reaction;
When (4) question response finishes, immediately the solid aluminium alloy is put into the reaction-ure surface of crucible, utilized waste heat to make its fusing, get the liquid aluminium alloy melt;
(5) when carrying out step (4), aluminum alloy part fracture to be welded is preheated to 400 ℃ ± 10 ℃ with the thermit reaction product;
(6) aluminium alloy melt directly is poured into the aluminum alloy part incision position of having handled well, carries out densification by knocking the extruding weld seam when treating that the weld seam metal has just solidified, realize welding;
(7) take advantage of high temperature, the manual cleanup overlap;
Described aluminum heat flux contains 20%, granularity is 20-30 purpose aluminium powder and contain granularity less than 100 orders, phosphorus content less than 0.5% iron oxide 55-60%.
2. a kind of aluminothermy welding method of aluminium alloy according to claim 1 is characterized in that: described TiC igniting agent is all 200 purpose Ti powder by granularity and the C powder is preparation in 1: 1, mixing by atomic ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100218716A CN101347868B (en) | 2008-08-18 | 2008-08-18 | Aluminothermy welding method of aluminium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100218716A CN101347868B (en) | 2008-08-18 | 2008-08-18 | Aluminothermy welding method of aluminium alloy |
Publications (2)
| Publication Number | Publication Date |
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| CN101347868A CN101347868A (en) | 2009-01-21 |
| CN101347868B true CN101347868B (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100218716A Expired - Fee Related CN101347868B (en) | 2008-08-18 | 2008-08-18 | Aluminothermy welding method of aluminium alloy |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102059450A (en) * | 2011-01-17 | 2011-05-18 | 江阴东大新材料研究院 | Portable thermite welding shaft welder and shaft welding method thereof |
| CN102699522A (en) * | 2011-01-17 | 2012-10-03 | 江阴东大新材料研究院 | Method for welding shaft of portable exothermic welding shaft welder |
| CN102248280A (en) * | 2011-06-24 | 2011-11-23 | 中国科学院宁波材料技术与工程研究所 | Thermit reaction foil, manufacturing method thereof and application thereof to welding process |
| CN103014699A (en) * | 2012-12-28 | 2013-04-03 | 江阴东大新材料研究院 | Static self-propagating method for preparing aluminum oxide ceramic coating on surfaces of steel plates |
| CN103286476B (en) * | 2013-05-13 | 2015-02-04 | 兰州连城铝业有限责任公司 | Flux for electrified maintenance of riser bus bars of aluminum cells |
| CN103317226B (en) * | 2013-05-30 | 2016-06-29 | 青铜峡铝业股份有限公司 | A kind of secondary self-propagation seal method of cathode of aluminium electrolytic bath soft ribbons and big bus |
| CN109366040B (en) * | 2018-12-19 | 2021-02-19 | 成都雷斯特科技有限公司 | Exothermic welding agent and welding method thereof |
| CN109822210B (en) * | 2019-03-22 | 2024-02-13 | 施密特钢轨技术（昆山）有限公司 | Thermite welding safety ignition device and ignition method |
| CN110253166A (en) * | 2019-05-21 | 2019-09-20 | 安徽工程大学 | A kind of device for eliminating aluminum steel dissimilar metal weld crack and stomata |
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