CN108941966B - A kind of graphene strengthens the welding method of steel Al dissimilar materials weld seam - Google Patents
A kind of graphene strengthens the welding method of steel Al dissimilar materials weld seam Download PDFInfo
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- CN108941966B CN108941966B CN201810948506.3A CN201810948506A CN108941966B CN 108941966 B CN108941966 B CN 108941966B CN 201810948506 A CN201810948506 A CN 201810948506A CN 108941966 B CN108941966 B CN 108941966B
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- graphene
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
Abstract
The invention discloses the welding methods that a kind of graphene strengthens steel Al dissimilar materials weld seam, comprising the following steps: (1): example takes a certain amount of nickel powder and Graphene powder in mass ratio, carries out ball milling mixing, obtains nickel/graphene mixed powder after mixing；(2): uniformly mixed nickel/graphene mixed powder being placed in press mold, nickel/graphene block blank is pressed into, the blank suppressed is prepared into nickel/graphene composite material by way of vacuum-sintering；(3): nickel/graphene composite material is rolled into certain thickness nickel/graphene composite foil；(4): choosing nickel/graphene composite foil of same thickness by the thickness of jointed sheet material to be welded and cut into required weld size, be then clamped between processing clean steel and aluminium alloy to be welded；(5): steel and aluminium alloy being welded, the steel Al dissimilar materials weld seam of graphene enhancing is obtained, this method can be improved the intensity and toughness of welding point.
Description
Technical field
The present invention relates to the welding methods that a kind of graphene strengthens steel Al dissimilar materials weld seam.
Background technique
Currently, development of automobile industry is rapid.Encourage Resources for construction economizing type, environmentally friendly society in China.So vapour
Vehicle enterprise and consumer pay special attention to Fuel consumption.An effective way for lowering energy consumption is exactly to reduce vehicle body matter
Amount, on the one hand energy conservation；It on the other hand is the dynamic role for promoting automobile, carrying capacity.So each vehicle factor is all paid much attention to gently
Quantify work.Its most effective means is to select lightweighting materials.Presently mainly based on aluminium alloy.The density of aluminium is about
2.7×103kg/m3, it is only the 1/3 of steel, therefore manufacture auto parts and components with aluminium and aluminium alloy and imitated with apparent loss of weight energy conservation
Fruit.But in view of comprehensively considering for economy and safety, at present new-energy automobile frequently be aluminum-steel hybrid vehicle body.Exist in this way
It just will appear the demand of a large amount of steel Al dissimilar materials welding in the development of future automobile industry.
However, causing steel/aluminium welding point easily raw in interface since the physical and chemical performance of steel and aluminium differs greatly
At brittle Fe-Al intermetallic compound, so that the intensity and toughness of welding are unable to satisfy actual production demand, it is serious to restrict
The further development of aluminum-steel hybrid vehicle body.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of strength of welded joint and toughness of can be improved
The welding method of graphene reinforcing steel Al dissimilar materials weld seam.
A kind of graphene proposed by the present invention strengthens the welding method of steel Al dissimilar materials weld seam, comprising the following steps:
Step (1): example takes a certain amount of nickel powder and Graphene powder in mass ratio, carries out ball milling mixing, after mixing
To nickel/graphene mixed powder；
Step (2): uniformly mixed nickel/graphene mixed powder is placed in press mold, nickel/graphene block is pressed into
The blank suppressed is prepared nickel/graphene composite material by blank by way of vacuum-sintering；
Step (3): nickel/graphene composite material is rolled into certain thickness nickel/graphene composite foil；
Step (4): nickel/graphene composite foil of same thickness is chosen by the thickness of jointed sheet material to be welded and is cut into
Then required weld size is clamped between processing clean steel and aluminium alloy to be welded；
Step (5): welding steel and aluminium alloy, obtains the steel Al dissimilar materials weld seam of graphene enhancing.
Further, nickel powder and the mass ratio of Graphene powder are 9.5:0.5~9:1 in step (1).
Further, ball milling method is planetary ball mill in step (1), and ball milling is speed 100-350r/min, Ball-milling Time
Be 2 hours, using stainless steel jar mill and stainless steel steel ball, the weight ratio of steel ball and powder is 5:1, the diameter of steel ball be 8mm,
5mm or 3mm.
Further, in step (2) press by nickel/graphene mixed powder be pressed into block pressure be 500MPa.
Further, in step (2) vacuum-sintering mode are as follows: nickel/graphene block blank is put into vacuum drying oven, is taken out true
Sky was uniformly warming up to 1050 DEG C at 2 hours, then kept the temperature 2 hours, was then uniformly reduced to room temperature at 2 hours.
Further, in step (3) nickel/graphene composite foil with a thickness of 0.5~3mm.
Further, nickel/graphene composite foil cutter size presses butt-welded area or overlap joint welding in step (4)
Area cut.
Further, the processing mode of steel and aluminium alloy is in step (5): carrying out deburring to weld before welding
With smooth processing.
According to the above aspect of the present invention, the present invention has at least the following advantages: the side of graphene reinforcing steel Al dissimilar materials weld seam
Method can be improved the intensity and toughness of steel aluminium dissimilar welding joint.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is nickel/graphene composite material XRD spectrum in the present invention；
Fig. 2 is nickel/graphene composite material Raman spectrogram in the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Embodiment: a kind of graphene strengthens the welding method of steel Al dissimilar materials weld seam, includes the following steps:
Step (1): nickel powder and the total 500g of Graphene powder are taken by the mass ratio of 9:1.Nickel powder, average grain diameter is less than 1 μ
M, multi-layer graphene nanometer sheet, average-size is less than 2 μm.Planetary ball mill, ball are carried out after nickel powder and graphene powder are mixed
Mill is speed 300r/min, and Ball-milling Time is 2 hours, using stainless steel jar mill and stainless steel steel ball, the weight of steel ball and powder
Measuring ratio is 5:1, and the diameter of steel ball is 8mm, 5mm or 3mm, and mechanical milling process does not use protective gas.
Step (2): the mixed powder after ball milling is placed on press with mold with 500MPa pressure, be pressed into 200mm ×
The block blank suppressed is then put into corundum crucible by the block of 100mm × 5mm, is then placed in vacuum drying oven and is carried out vacuum
Sintering, the mode of vacuum-sintering are as follows: it vacuumizes, was uniformly warming up to 1050 DEG C at 2 hours, then keep the temperature 2 hours, it is then small 2
When be uniformly reduced to room temperature.
Step (3): the bulk nickel sintered/grapheme material is subjected to rolling 0.5mm, 1mm, 2mm, 3mm etc. no
The foil of same specification.
Step (4): 2.5mm thickness DP590 and AA6061 aluminium alloy, acetone degreasing are selected；And it is gone at place to be welded
Nickel/graphene foil of 1mm is pressed from both sides in burr and smooth processing between the heap plumb joint for handling clean AA6061 aluminium alloy and steel
Material such as uses overlap joint welding, the then nickel/graphene foil for the 1mm for being in aluminum alloy surface laying depth；By butt-welded face
Long-pending or overlap joint welding area cut nickel/graphene foil of corresponding size, and steel plate and aluminium alloy are placed on workbench,
And two blocks of plates to be welded are made to clamp nickel/graphene foil with dedicated welding fixture.
Step (5): being welded using modes such as laser, electric arc or friction rabbling weldings, obtains the steel aluminium of graphene enhancing
Dissimilar material weld seam.
Can the main technical principle of the technology be as follows: in fact, obtain high quality for steel/aluminium dissimilar welding
Welding point reduce or inhibit the brittle Fe-Al intermetallic compound in interface first is that needing to inhibit Fe-Al metallurgical reaction
Precipitation；Second is that forming high-intensitive alloy weld seam transition zone.For first point from the basic principle of materialogy, only need
The generation that a kind of element is able to suppress Fe-Al metallurgical reaction is added.From Fe-Al phasor and Ni-Al phasor,
Ni-Al metallurgical reaction start temperature (1680 DEG C) is apparently higher than Fe-Al metallurgical reaction (1500 DEG C), from metallurgical reaction angle and
Speech, Ni-Al metallurgical reaction occur prior to Fe-Al metallurgical reaction, can hinder the generation of Fe-Al metallurgical reaction, reduce steel/aluminium
The thickness of laser welding head interface Fe-Al intermetallic compounds layer.On the other hand, it is inevitably given birth in weld seam after addition Ni
At Fe-Ni and Ni-Al intermetallic compound, then other materials is properly added to improve Fe-Ni and Ni-Al intermetallic compound
Toughness further increases the intensity of welding point.Therefore, if adding above-mentioned material in aluminum alloy surface in the welding process,
And guarantee its uniformity, above-mentioned design can be realized.For second point, design of the invention is, with solving the problems, such as at first point
Then Ni adds graphene as basis material, prepare graphene enhancing nickel base nanometer composite material in advance.It then will be prepared
Nickel/graphene nanocomposite material be rolled into certain thickness foil, the adding layers transition material as steel aluminium dissimilar welding.
The steel Al dissimilar materials weld seam of graphene enhancing is obtained after welding.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (5)
1. the welding method that a kind of graphene strengthens steel Al dissimilar materials weld seam, which comprises the following steps:
Step (1): example in mass ratio takes a certain amount of nickel powder and Graphene powder, carries out ball milling mixing, obtain after mixing nickel/
Graphene mixed powder；
Step (2): uniformly mixed nickel/graphene mixed powder is placed in press mold, nickel/graphene block base is pressed into
Material, prepares nickel/graphene composite material for the blank suppressed by way of vacuum-sintering；
Step (3): nickel/graphene composite material is rolled into certain thickness nickel/graphene composite foil；
Step (4): needed for being chosen nickel/graphene composite foil of same thickness by the thickness of jointed sheet material to be welded and cut into
Weld size, be then clamped between processing clean steel and aluminium alloy to be welded；
Step (5): welding steel and aluminium alloy, obtains the steel Al dissimilar materials weld seam of graphene enhancing；
Nickel powder and the mass ratio of Graphene powder are 9.5:0.5~9:1 in step (1)；
Ball milling method is planetary ball mill in step (1), and ball milling is speed 100-350r/min, and Ball-milling Time is 2 hours, using not
The weight ratio of steel ball grinding jar of becoming rusty and stainless steel steel ball, steel ball and powder is 5:1, and the diameter of steel ball is 8mm, 5mm or 3mm；
Nickel/graphene composite foil is in step (3) with a thickness of 0.5~3mm.
2. the welding method that a kind of graphene according to claim 1 strengthens steel Al dissimilar materials weld seam, it is characterised in that:
In step (2) press by nickel/graphene mixed powder be pressed into block pressure be 500MPa.
3. the welding method that a kind of graphene according to claim 1 strengthens steel Al dissimilar materials weld seam, it is characterised in that:
The mode of vacuum-sintering in step (2) are as follows: nickel/graphene block blank is put into vacuum drying oven, is vacuumized, was uniformly risen at 2 hours
Then temperature keeps the temperature 2 hours to 1050 DEG C, be then uniformly reduced to room temperature at 2 hours.
4. the welding method that a kind of graphene according to claim 1 strengthens steel Al dissimilar materials weld seam, it is characterised in that:
Nickel/graphene composite foil cutter size is cut by the area of butt-welded area or overlap joint welding in step (4).
5. the welding method that a kind of graphene according to claim 1 strengthens steel Al dissimilar materials weld seam, it is characterised in that:
The processing mode of steel and aluminium alloy is in step (5): carrying out deburring and smooth processing to weld before welding.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810948506.3A CN108941966B (en) | 2018-08-20 | 2018-08-20 | A kind of graphene strengthens the welding method of steel Al dissimilar materials weld seam |
| PCT/CN2018/101621 WO2020037522A1 (en) | 2018-08-20 | 2018-08-22 | Welding method for preparing graphene-reinforced weld seam between dissimilar steel and aluminum materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810948506.3A CN108941966B (en) | 2018-08-20 | 2018-08-20 | A kind of graphene strengthens the welding method of steel Al dissimilar materials weld seam |
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| CN108941966A CN108941966A (en) | 2018-12-07 |
| CN108941966B true CN108941966B (en) | 2019-11-12 |
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| WO (1) | WO2020037522A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112453758B (en) * | 2020-10-29 | 2022-04-29 | 西安理工大学 | Welding wire for graphene-enhanced TA1-Q345 middle layer and preparation method |
| CN112643182A (en) * | 2020-12-09 | 2021-04-13 | 内蒙古第一机械集团股份有限公司 | Process method for manufacturing aluminum-high-strength steel composite plate |
| CN112935621B (en) * | 2021-01-20 | 2022-05-31 | 西安理工大学 | Welding wire for graphene-enhanced TA1-Q345 middle layer and preparation method |
| CN113198840B (en) * | 2021-04-22 | 2022-04-12 | 武汉大学 | Method for preparing graphene from carbon nano tube and application of graphene |
| CN114952073A (en) * | 2022-05-09 | 2022-08-30 | 广西大学 | Preparation method of nickel-plated graphene reinforced tin-based soldering paste |
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| CN1413792A (en) * | 2002-10-21 | 2003-04-30 | 哈尔滨工业大学 | Active compound gradient separation diffusion welding method for titanium aluminium base alloy and steel |
| CN102581504A (en) * | 2012-03-23 | 2012-07-18 | 天津大学 | Graphene reinforced lead-free solder and preparation method thereof |
| CN105382440A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨工业大学 | Graphene-enhanced Al-based composite solder auxiliary soldering method |
| CN105551860A (en) * | 2016-02-26 | 2016-05-04 | 济南大学 | Preparation method of nickel-plated graphene/silver-nickel electrical contact material |
| CN105695788A (en) * | 2016-04-08 | 2016-06-22 | 上海和伍复合材料有限公司 | Graphene strengthening nickel base composite material and preparing method thereof |
| CN106903454A (en) * | 2017-04-28 | 2017-06-30 | 西安航空学院 | A kind of aluminum steel xenogenesis connects soldering solder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10675703B2 (en) * | 2016-04-08 | 2020-06-09 | GM Global Technology Operations LLC | Al-steel weld joint |
| CN107262862A (en) * | 2017-06-22 | 2017-10-20 | 北京科技大学 | A kind of steel of nickel and zinc composite deposite/aluminium soldering method |
| CN108188579B (en) * | 2018-01-09 | 2019-09-20 | 苏州大学 | A kind of method for laser welding of steel/Al dissimilar materials |
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2018
- 2018-08-20 CN CN201810948506.3A patent/CN108941966B/en active Active
- 2018-08-22 WO PCT/CN2018/101621 patent/WO2020037522A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413792A (en) * | 2002-10-21 | 2003-04-30 | 哈尔滨工业大学 | Active compound gradient separation diffusion welding method for titanium aluminium base alloy and steel |
| CN102581504A (en) * | 2012-03-23 | 2012-07-18 | 天津大学 | Graphene reinforced lead-free solder and preparation method thereof |
| CN105382440A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨工业大学 | Graphene-enhanced Al-based composite solder auxiliary soldering method |
| CN105551860A (en) * | 2016-02-26 | 2016-05-04 | 济南大学 | Preparation method of nickel-plated graphene/silver-nickel electrical contact material |
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| CN106903454A (en) * | 2017-04-28 | 2017-06-30 | 西安航空学院 | A kind of aluminum steel xenogenesis connects soldering solder |
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| CN108941966A (en) | 2018-12-07 |
| WO2020037522A1 (en) | 2020-02-27 |
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