CN104999175A - Method for improving uniformity of composite material manufactured by friction stir processing through adding polytetrafluoroethylene - Google Patents
Method for improving uniformity of composite material manufactured by friction stir processing through adding polytetrafluoroethylene Download PDFInfo
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- CN104999175A CN104999175A CN201510473293.XA CN201510473293A CN104999175A CN 104999175 A CN104999175 A CN 104999175A CN 201510473293 A CN201510473293 A CN 201510473293A CN 104999175 A CN104999175 A CN 104999175A
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- ptfe
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- polytetrafluoroethylene
- mixing yoghurt
- intermetallic compound
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1275—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding involving metallurgical change
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/128—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding making use of additional material
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Abstract
The invention discloses a method for improving uniformity of a composite material manufactured by friction stir processing through adding polytetrafluoroethylene. The method is implemented through the following steps: taking PTFE powders and M alloy powders in a certain proportion, uniformly mixing the powders to store; punching a blind hole on the center of a substrate panel, filling the uniformly mixed powders into the prepared substrate panel and pressing the powders; performing friction stir processing on a powder filling region on the substrate panel, a stir head generating heat by friction and under the action of rotation stirring of a stirring pin, the PTFE accelerating the M alloy powders to fully react with Al to form an Al-M intermetallic compound, the Al-M intermetallic compound uniformly distributing on the substrate, and finally, uniform intermetallic compound reinforced metal matrix composite material is obtained. The method is advantaged in that the method solves agglomeration phenomenon in an in-situ synthesized composite material process using pure alloy powder friction stir processing, and through adding the PTFE, intermetallic compound reinforcement phase is uniformly distributed in the substrate.
Description
Technical field
The present invention relates to a kind of mixing yoghurt fabricated in situ intermetallic compound and strengthen the method for metal-base composites, be specifically related to a kind of polytetrafluorethylepowder powder that adds and improve the method that FSP prepares composite uniformity.
Background technology
Along with developing rapidly of space flight and aviation, electronics and sophisticated and futuristic weapons system, the single structural material of tradition is difficult to meet the demand of lightweight, high-strength, high abrasion day by day, and the Composite of material becomes an important directions of Materials.Metal-base composites has high specific strength, high ratio modulus because of it, excellent a series of feature such as abrasion resistance properties, dimensional stability and be subject to the extensive concern of researcher.Mixing yoghurt technology, owing to solve in the contaminated and conventional composite materials preparation technology of mechanical alloying product the problems such as reinforcement wetability difference, is the desirable technology of preparing of obtaining intermetallics composite.
Many scholars are had to carry out experimental study for mixing yoghurt synthetic composite material both at home and abroad at present.Research shows, pure alloy powder mixing yoghurt is prepared composite and be there will be obvious inhomogeneities.As Ke L.M., Huang C.P., the people such as Xing L were " Journal of Alloys and Compounds " (2010,503rd volume, 494-499 page) " the Al – Ni intermetallic composites produced in situ by friction stir processing " that deliver, from this paper, find that pure alloy powder mixing yoghurt synthetic composite material there will be the discontinuity of materials being difficult to avoid, main manifestations is powder agglomeration.This inhomogeneities also can cause the growing amount of intermetallic compound to reduce and then badly influence high-strength, the high-wear resistance of composite.
At present, the improvement of original material and instrument is mainly concentrated on for the research how improving the inhomogeneities of mixing in friction processing fabricated in situ composite material, if application number is 2013102470543, the Chinese patent design that denomination of invention is " a kind of mixing yoghurt prepares the stirring-head of metal-base composites " and application number are 2012100879058, the Chinese patent design that denomination of invention is " preparation method of hollow reducing porous friction head and metal material surface composite " is all the inhomogeneities being improved composite by the design of change stirring-head, and not do not improve by adding PTFE powder the method that FSP prepares composite uniformity.
Summary of the invention
The object of the invention is to strengthen the insoluble non-uniformity problem of metal-base composites technology for pure alloy powder mixing yoghurt fabricated in situ intermetallic compound, provide a kind of polytetrafluoroethylene (PTFE) that adds to improve the method that mixing yoghurt (FSP) prepares composite uniformity.
The present invention adopts technical scheme as follows; Add polytetrafluoroethylene (PTFE) and improve the method that mixing yoghurt prepares composite uniformity, the inhomogeneities of mixing yoghurt fabricated in situ composite can be improved, realized by following steps:
(1) get a certain proportion of PTFE powder and M alloy powder, adopt churned mechanically method Homogeneous phase mixing, then preserve; In the middle of matrix sheet material, beat blind hole, the diameter of blind hole is D, is spaced apart L, depth H;
(2) powder mixed to be inserted in ready matrix sheet material and compacting;
(3) mixing yoghurt is carried out to the powder fill area on matrix sheet material, under the Stirring effect of stirring-head frictional heat and mixing needle, PTFE promotes that M alloy powder and Al fully react and forms Al-M intermetallic compound and be uniformly distributed with on matrix, finally obtains uniform intermetallic compound and strengthens metal-base composites.
In step of the present invention (1), the content of PTFE is 0 ~ 9% of PTFE+M gross mass, and the diameter D of blind hole is 3 ~ 6mm, and blind hole interval L is 4 ~ 6mm, and depth H is less than the thickness of plate.
In step of the present invention (3), the rotary speed of stirring-head is 750r/min ~ 1500 r/min, and speed of welding is 30mm/min ~ 90mm/min, and the inclination angle of stirring-head is 0 ~ 2 °, and mixing yoghurt number of times is 1 ~ 5 time.
In the middle of step of the present invention, the interpolation of PTFE can increase the formation volume of intermetallic compound.
In the middle of step of the present invention, alloy powder M can react the alloy forming intermetallic compound wild phase, as one or more in Ni, Ti, Fe, Cu with parent metal.
In the middle of step of the present invention, matrix sheet material can be pure aluminum plate, aluminium alloy plate and other sheet metals.
Composite material reinforcement body of the present invention is compound between in-situ authigenic metal, as AlM, Al
3m
2, Al
5m
2, Al
3one or more in the intermetallic compounds such as M.
In the middle of step of the present invention, alloy powder M is irregular contour powder and spherical powder.
In the middle of step of the present invention, the addition manner of alloy powder is not limited on matrix sheet material, beat blind hole interpolation powder, also can be fluting on matrix sheet material and adds powder.
In the middle of step of the present invention, the interpolation of PTFE is also applicable to the preparation method of other fabricated in situ intermetallic compound reinforced composites, as composite is prepared in mechanical alloying.
The present invention has the following advantages: (1) the invention solves the agglomeration occurred in pure alloy powder mixing yoghurt fabricated in situ composite material, by adding PTFE, intermetallic compound wild phase is uniformly distributed in the base; (2) facilitate the reaction of Al-Ni intermetallic compound by adding PTFE, thus add the formation volume of intermetallic compound.
Accompanying drawing explanation
Fig. 1 is mixing yoghurt schematic diagram of the present invention.
Fig. 2 is the SEM figure of pure nickel powder of the present invention.
Fig. 3 is the SEM figure of the PTFE+Ni mixed-powder mixed through mechanical agitation of the present invention.
Fig. 4 be pure Ni powder mixing yoghurt synthetic composite material of the present invention organize microgram.
Fig. 5 the present invention organizes microgram by the composite of interpolation 3% polytetrafluoroethylene (PTFE) (PTFE) powder preparation.
Fig. 6 the present invention organizes microgram by the composite of interpolation 6% polytetrafluoroethylene (PTFE) (PTFE) powder preparation.
Fig. 7 the present invention organizes microgram by the composite of interpolation 9% polytetrafluoroethylene (PTFE) (PTFE) powder preparation.
The XRD comparison diagram that Fig. 8 is the pure Ni powder of interpolation of the present invention, PTFE mass ratio is the mixed-powder mixing yoghurt synthetic composite material of 3%, 6%, 9%.
Detailed description of the invention
As shown in Figure 1, the present invention comes work and enforcement like this, and a kind of polytetrafluoroethylene (PTFE) that adds improves the method that mixing yoghurt prepares composite uniformity, and present embodiment is realized by following steps:
Step one: get a certain proportion of PTFE powder and Ni powder, adopts churned mechanically method Homogeneous phase mixing, then seals preservation; In the middle of matrix pure aluminum plate, beat blind hole, the diameter of blind hole is D, is spaced apart L, depth H (being less than the thickness of plate); The content of PTFE is 0 ~ 9% of PTFE+Ni gross mass, and the diameter in hole is 3 ~ 6mm, and span is 4 ~ 6mm.
Step 2: the powder mixed to be inserted in ready matrix pure aluminum plate and compacting;
Step 3: mixing yoghurt is carried out to the powder fill area on matrix pure aluminum plate.The rotary speed of stirring-head is 750r/min ~ 1500 r/min, and speed of welding is 30mm/min ~ 90mm/min, and the inclination angle of stirring-head is 0 ~ 2 °, and mixing yoghurt number of times is 1 ~ 5 time.Under the Stirring effect of stirring-head frictional heat and mixing needle, PTFE promotes that Ni powder and Al fully react and forms Al-Ni intermetallic compound and be uniformly distributed in recombination region, finally obtains uniform intermetallic compound reinforced aluminum matrix composites.
Detailed description of the invention two: composition graphs 1 illustrates present embodiment, the content of the PTFE in the middle of the step one of present embodiment is 1%, and the diameter in hole is 3mm, interval 4mm, blind hole depth 4mm, Rotating speed 950 r/min, speed of welding 30mm/min, tilt angle 2 °, processing passage 5 times.
Detailed description of the invention three: composition graphs 1 illustrates present embodiment, the content of the PTFE in the middle of the step one of present embodiment is 3%, and other steps are identical with detailed description of the invention two.
Detailed description of the invention four: composition graphs 1 illustrates present embodiment, the content of the PTFE in the middle of the step one of present embodiment is 5%, and other steps are identical with detailed description of the invention two.
Detailed description of the invention five: composition graphs 1 illustrates present embodiment, the content of the PTFE in the middle of the step one of present embodiment is 6%, and other steps are identical with detailed description of the invention two.
Detailed description of the invention six; Composition graphs 1 illustrates present embodiment, and the content of the PTFE in the middle of the step one of present embodiment is 9%, and other steps are identical with detailed description of the invention two.
Application example of the present invention:
Embodiment one
Get 1060 aluminium alloy plates that 5mm is thick, processing one row blind hole in the middle of aluminium sheet, the diameter in hole is 3mm, and the degree of depth and gap are 4mm; Ni powder to be inserted in blind hole and compacting.Carry out mixing yoghurt to the powder fill area of matrix, the rotary speed of stirring-head is 950 r/min, and speed of welding is 30mm/min, tilt angle 2 °, processing passage 5 times.As shown in Figure 2, find that Bonded Zone Structure finds obvious agglomeration.
Comparative example one
Be that 99:3 takes powder by the mass ratio of Ni powder and PTFE powder, adopt churned mechanically method by its Homogeneous phase mixing; Get 1060 aluminium alloy plates that 5mm is thick, processing one row blind hole in the middle of aluminium sheet, the diameter in hole is 3mm, and the degree of depth and gap are 4mm; The powder mixed to be inserted in blind hole and compacting.Carry out mixing yoghurt to the powder fill area of matrix, the rotary speed of stirring-head is 950 r/min, and speed of welding is 30mm/min, tilt angle 2 °, processing passage 5 times.
Comparative example two
Be that 97:6 takes powder by the mass ratio of Ni powder and PTFE powder, and adopt churned mechanically method by its Homogeneous phase mixing; Get 1060 aluminium alloy plates that 5mm is thick, processing one row blind hole in the middle of aluminium sheet, the diameter in hole is 3mm, and the degree of depth and gap are 4mm; The powder mixed to be inserted in blind hole and compacting.Carry out mixing yoghurt to the powder fill area of matrix, the rotary speed of stirring-head is 1180 r/min, and speed of welding is 60mm/min, tilt angle 2 °, processing passage 5 times.
Comparative example three
Be that 95:9 takes powder by the mass ratio of Ni powder and PTFE powder, adopt churned mechanically method by its Homogeneous phase mixing; Get 1060 aluminium alloy plates that 5mm is thick, processing one row blind hole in the middle of aluminium sheet, the diameter in hole and the degree of depth are 4mm, and gap is 5mm; The powder mixed to be inserted in blind hole and compacting.Carry out mixing yoghurt to the powder fill area of matrix, the rotary speed of stirring-head is 1500 r/min, and speed of welding is 90mm/min, tilt angle 2 °, processing passage 4 times.
Above-mentioned three comparison example all have employed the method that the FSP adding PTFE powder prepares composite.The microstructure of recombination region, as shown in Fig. 5, Fig. 6, Fig. 7, solves pure alloy powder mixing yoghurt and prepares the agglomeration occurred in composite material.
Claims (8)
1. add polytetrafluoroethylene (PTFE) and improve the method that mixing yoghurt prepares composite uniformity, realized by following steps:
(1) get a certain proportion of PTFE powder and M alloy powder, adopt churned mechanically method Homogeneous phase mixing, then preserve; In the middle of matrix sheet material, beat blind hole, the diameter of blind hole is D, is spaced apart L, depth H;
(2) powder mixed to be inserted in ready matrix sheet material and compacting;
(3) mixing yoghurt is carried out to the powder fill area on matrix sheet material, under the Stirring effect of stirring-head frictional heat and mixing needle, PTFE promotes that M alloy powder and Al fully react and forms Al-M intermetallic compound and be uniformly distributed with on matrix, finally obtains uniform intermetallic compound and strengthens metal-base composites.
2. a kind of polytetrafluoroethylene (PTFE) that adds according to claim 1 improves the method that mixing yoghurt prepares composite uniformity, it is characterized in that; In described step (1), the content of PTFE is 0 ~ 9% of PTFE+M gross mass, and the diameter D of blind hole is 3 ~ 6mm, and blind hole interval L is 4 ~ 6mm, and depth H is less than the thickness of plate.
3. a kind of polytetrafluoroethylene (PTFE) that adds according to claim 1 improves the method that mixing yoghurt prepares composite uniformity, it is characterized in that; In described step (3), the rotary speed of stirring-head is 750r/min ~ 1500 r/min, and speed of welding is 30mm/min ~ 90mm/min, and the inclination angle of stirring-head is 0 ~ 2 °, and mixing yoghurt number of times is 1 ~ 5 time.
4. a kind of polytetrafluoroethylene (PTFE) that adds according to claim 1 improves the method that mixing yoghurt prepares composite uniformity, it is characterized in that; In the middle of described step, alloy powder M can react with parent metal the alloy forming intermetallic compound wild phase.
5. a kind of polytetrafluoroethylene (PTFE) that adds according to claim 1 improves the method that mixing yoghurt prepares composite uniformity, it is characterized in that; In the middle of described step, matrix sheet material can be pure aluminum plate, aluminium alloy plate and other sheet metals.
6. a kind of polytetrafluoroethylene (PTFE) that adds according to claim 1 improves the method that mixing yoghurt prepares composite uniformity, it is characterized in that; Described composite material reinforcement body is compound between in-situ authigenic metal.
7. a kind of polytetrafluoroethylene (PTFE) that adds according to claim 1 improves the method that mixing yoghurt prepares composite uniformity, it is characterized in that; In the middle of described step, alloy powder M is irregular contour powder and spherical powder.
8. a kind of polytetrafluoroethylene (PTFE) that adds according to claim 1 improves the method that mixing yoghurt prepares composite uniformity, it is characterized in that; In the middle of described step, another mode of the addition manner of alloy powder is that fluting adds powder on matrix sheet material.
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Cited By (4)
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| CN106736270A (en) * | 2016-12-01 | 2017-05-31 | 中国科学院金属研究所 | A kind of processing method for improving aluminum-based composite material plate mill product rate |
| CN109822293A (en) * | 2019-02-19 | 2019-05-31 | 西安建筑科技大学 | A kind of preparation method of through-thickness functionally gradient material (FGM) and the application for preparing magnesium alloy |
| CN112025073A (en) * | 2019-06-03 | 2020-12-04 | 南京理工大学 | Method for improving mechanical property of laminated armor aluminum alloy friction stir welding joint |
| CN115383129A (en) * | 2022-08-16 | 2022-11-25 | 燕山大学 | Method for preparing intermetallic compound reinforced aluminum-based gradient composite material by in-situ synthesis and composite material |
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| CN102717182A (en) * | 2012-06-25 | 2012-10-10 | 上海交通大学 | In-situ reaction method for preparing aluminum-base composite material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109822293A (en) * | 2019-02-19 | 2019-05-31 | 西安建筑科技大学 | A kind of preparation method of through-thickness functionally gradient material (FGM) and the application for preparing magnesium alloy |
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| CN112025073A (en) * | 2019-06-03 | 2020-12-04 | 南京理工大学 | Method for improving mechanical property of laminated armor aluminum alloy friction stir welding joint |
| CN115383129A (en) * | 2022-08-16 | 2022-11-25 | 燕山大学 | Method for preparing intermetallic compound reinforced aluminum-based gradient composite material by in-situ synthesis and composite material |
| CN115383129B (en) * | 2022-08-16 | 2024-03-19 | 燕山大学 | Preparation method of in-situ synthesized intermetallic compound reinforced aluminum-based gradient composite material and composite material |
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