CN102107328B - Combined type welding tool used for friction stir welding of metal matrix composite - Google Patents
Combined type welding tool used for friction stir welding of metal matrix composite Download PDFInfo
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- CN102107328B CN102107328B CN 200910248671 CN200910248671A CN102107328B CN 102107328 B CN102107328 B CN 102107328B CN 200910248671 CN200910248671 CN 200910248671 CN 200910248671 A CN200910248671 A CN 200910248671A CN 102107328 B CN102107328 B CN 102107328B
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- 238000003466 welding Methods 0.000 title claims abstract description 93
- 238000003756 stirring Methods 0.000 title abstract description 11
- 239000011156 metal matrix composite Substances 0.000 title abstract 4
- 238000004021 metal welding Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000005219 brazing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 229910001315 Tool steel Inorganic materials 0.000 claims abstract description 8
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 6
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 4
- 238000005476 soldering Methods 0.000 claims description 57
- 238000002156 mixing Methods 0.000 claims description 46
- 239000011195 cermet Substances 0.000 claims description 30
- 239000002131 composite material Substances 0.000 claims description 27
- 238000002360 preparation method Methods 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 229910000679 solder Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000003870 refractory metal Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 3
- 229910010293 ceramic material Inorganic materials 0.000 abstract 3
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 229910001103 M42 high speed steel Inorganic materials 0.000 description 6
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 6
- 229910001120 nichrome Inorganic materials 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 238000009628 steelmaking Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910009043 WC-Co Inorganic materials 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 210000001138 tear Anatomy 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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- 230000000717 retained effect Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
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Abstract
The invention relates to the field of metal matrix composite and welding, and particularly provides a combined type friction stir welding tool which is prepared from metal ceramic and alloy tool steel by using vacuum brazing connection technology, wherein the welding tool is suitable for the friction stir welding of the particle reinforced metal matrix composite. A shaft shoulder and a stirring needle of the welding tool are made of high intensity wearable metal ceramic material, and a clamping end is made of alloy tool steel; and the welding tool is formed by connecting two materials through vacuum brazing. The high intensity wearable metal ceramic material of the welding tool takes ceramic particles as a reinforcing phase, and heat-resistant metal alloy as a binding phase; and the high intensity wearable metal ceramic material is prepared through a powder metallurgy vacuum sintering method. Compared with the traditional steel welding tool, when the combined type welding tool provided by the invention is used in the friction stir welding of the particle reinforced metal matrix composite, the abrasive resistance and the service life can be improved by more than 100 folds and high intensity factor of the welding line and high quality of the welding line surface can be obtained without introducing impurities to pollute the welding gap.
Description
Technical field:
The present invention relates to metal-base composites and welding field, provide especially a kind of and adopted the combined type of vacuum brazing interconnection technique preparation to stir friction welding tool by cermet and alloy tool steel, this soldering appliance is applicable to the agitating friction welding of particles reiforced metal-base composition.
Background technology:
Friction stir welding (FSW) is a kind of novel solid phase interconnection technique of Britain's institute of welding invention, since coming out, received people's very big concern, be successfully applied to the welding of the metal materials such as aluminium, magnesium, cause the change of the equipment manufacturing field production technologies such as Aeronautics and Astronautics, railway, automobile and shipbuilding, obtained significant economic benefit and social benefit.
Soldering appliance design is the core of agitating friction welding technology, and to select suitable soldering appliance material be the implementation tool design philosophy, obtain the key that high-quality connects, and wherein of paramount importance is that the material of the working portion-stirring-head of soldering appliance is selected.The essence of friction stir welding is heat-machine effect to occur between stirring-head and the materials to be welded and form joint, and stirring-head bears directly in this process that heat is carried, power is carried and fretting wear.When the softer materials such as welding of aluminum, magnesium, the stirring-head material generally adopts tool steel to meet the demands, thereby soldering appliance adopts monolithic construction usually, and namely stirring-head and retained part are the integral body of identical material.
For the agitating friction welding of particles reiforced metal-base composition, the existence of hard ceramic particle makes stirring-head that heavy wear occur in welding process, and especially when higher rotation speed was welded, it was even more serious to wear and tear.Stirring-head weares and teares and not only reduces its service life, can't guarantee long distance welding, and also can form novel compound with the matrix element reaction of composite by the impurity element in the stirring-head wearing and tearing introducing weld seam, is unfavorable for that joint mechanical property improves.Although high hard antifriction alloy or structural ceramics can satisfy the wearability requirement of the friction stir welding of composite, yet the manufacturing of these materials and difficulty of processing are all larger, and the fragility of pottery can't satisfy the complex loading conditions of friction stir welding.
Cermet has high hardness and wearability by a kind of heterogeneous composite material that ceramic particle and heat-resistant metal alloys form, good high-temperature oxidation resistance, corrosion resistance and the coefficient of friction lower with metal.Compare with alloy tool steel, ceramic-metallic high rigidity and wearability make it to become the ideal chose of metal-base composites friction stir welding tool material.Yet if preparation monoblock type cermet soldering appliance, not only the sintering preparation is difficult, preparation cost is high, waste of material is large, and the following process amount is large, and yield rate is low.The particularly important is, cermet toughness is starkly lower than metal alloy, is easy to damage under the loading in composite of agitating friction welding.Consider that the stirring-head that is comprised of the shaft shoulder and mixing needle is the working portion of welding, the major requirement polishing machine; And bare terminal end bears larger torsion and cross shear when welding, needs good toughness, thereby design is expected to obtain best soldering appliance performance by the combined type welding tool that the different qualities material forms.
Summary of the invention:
The object of the present invention is to provide a kind of combined type welding tool for the welding of metal-base composites agitating friction, not only the sintering preparation is difficult, preparation cost is high, waste of material is large for monoblock type cermet soldering appliance in the solution prior art, and the problem such as the following process amount is large, yield rate is low, be applicable to the agitating friction welding of Discontinuous Reinforcement metal-base composites.
Technical scheme of the present invention is:
A kind of combined type welding tool for the welding of metal-base composites agitating friction, this combined type welding tool is provided with bare terminal end, the shaft shoulder and mixing needle, and the shaft shoulder is installed on the bare terminal end front end, and mixing needle is plugged in the shaft shoulder and bare terminal end; The shaft shoulder of described soldering appliance and mixing needle adopt the high-strength wearable cermet material, and the bare terminal end of soldering appliance adopts alloy tool steel, and soldering appliance is made of by the vacuum brazing connection is compound bi-material.
Described high-strength wearable cermet material is take ceramic particle as wild phase, take the refractory metal alloy as Binder Phase, by the preparation of powder metallurgy vacuum sintering method, hardness HRC54～65.
Described wild phase is TiC, Ti (C, N), WC or TiB
2, Binder Phase is the Ni base, Co is basic or the basic alloy of Fe.
The described soldering appliance shaft shoulder and mixing needle can be selected the cermet material of different hardness, and the shaft shoulder is slightly low with cermet hardness, and mixing needle is slightly high with cermet hardness.
The shaft shoulder of described soldering appliance, mixing needle and bare terminal end adopt vacuum brazing method to connect, and select copper base or Nickel Matrix Solder.
That described metal-base composites refers to that various ceramic particles or whisker strengthen is aluminium base, magnesium base, copper base or Zinc-base compounded material.
Vacuum brazing interconnection technique provided by the invention comprises the steps:
1, selects copper base or Ni-based sheet or paste scolder, such as CuMnCo, CuMnNi, BNi-2 scolder etc.
2, soldering appliance bare terminal end, the shaft shoulder, mixing needle and scolder are coated with anti-welding stop-off gent at non-face of weld after assembling, and apply to put into vacuum brazing furnace behind the briquetting and carry out heating soldering.
3, vacuum brazing temperature is 1000～1100 ℃, temperature retention time 30～60min.
In addition, combined type welding tool provided by the invention also can only carry out vacuum brazing between the two with soldering appliance bare terminal end and the cermet shaft shoulder and be connected, and mixing needle adopts fastening bolt to fix, thus form a kind of compound-unitized soldering set structure.
The invention has the beneficial effects as follows:
Combined type welding tool of the present invention is compared with traditional steel soldering appliance, when agitating friction welding particles reiforced metal-base composition, can improve in its wearability and service life more than 100 times, and can not introduce the contaminating impurity weld seam, can obtain high weld strength coefficient and high face of weld quality.In addition, this patent adopts soldering connecting structure, can save expensive and unmanageable cermet material, has reduced again the processing cost of soldering appliance, also be convenient to the modification of mixing needle shape, greatly improved flexibility, reliability and the practicality of soldering appliance.
Description of drawings:
Fig. 1 is combined type welding tool structural representation of the present invention.
Fig. 2 be of the present invention compound-unitized soldering appliance structural representation.
Among the figure, 1 bare terminal end; 2 shaft shoulders; 3 mixing needles; 4 soldered seams; 5 fastening bolts.
The specific embodiment:
As shown in Figure 1, the present invention is used for the combined type welding tool of metal-base composites agitating friction welding, mainly formed by bare terminal end 1, the shaft shoulder 2 and mixing needle 3 etc., the shaft shoulder 2 is installed on bare terminal end 1 front end, and mixing needle 3 is plugged in the shaft shoulder 2 and bare terminal end 1, and bare terminal end 1 is selected alloy tool steel, the shaft shoulder 2 and mixing needle 3 adopt the high-strength wearable cermet, the shaft shoulder and mixing needle can be selected the cermet material of different hardness, and the shaft shoulder is slightly low with cermet hardness, and mixing needle is slightly high with cermet hardness.Among the present invention, bare terminal end 1, the shaft shoulder 2 and mixing needle 3 adopt Vacuum Soldering Technology to connect into combined type welding tool, are soldered seam 4 between the shaft shoulder 2, mixing needle 3 and the bare terminal end 1.
As shown in Figure 2, the present invention is used for the combined type welding tool of metal-base composites agitating friction welding, also can only soldering appliance bare terminal end 1 and the cermet shaft shoulder 2 be carried out vacuum brazing between the two is connected, be soldered seam 4 between the shaft shoulder 2 and the bare terminal end 1, and mixing needle 3 adopts fastening bolt 5 fixing, thereby forms compound-unitized soldering set structure.
High-strength wearable cermet material provided by the invention is with ceramic particle (as: TiC, Ti (C, N), WC or TiB
2) be wild phase, take heat-resistant metal alloys (as: Ni is basic, Co is basic or the Fe yl) as Binder Phase, by the preparation of powder metallurgy vacuum sintering method, hardness HRC54～65.
The soldering appliance bare terminal end is selected the H13 steel, is of a size of Φ 12mm with shaft shoulder contact jaw.The shaft shoulder is selected Ti (C, N)/NiCr cermet, and hardness HRC56 is of a size of: cylindrical Φ 12mm, endoporus Φ 4mm, height 4mm.Mixing needle is selected Ti (C, N)/NiCr cermet, and hardness is HRC63, size Φ 4 * 18mm, the long 3mm of projecting shaft shoulder portion.Cored solder adopts CuMnNi scolder, thickness 0.2mm.Soldering appliance bare terminal end, the shaft shoulder, mixing needle and scolder are coated with anti-welding stop-off gent at non-face of weld after assembling, and apply to put into vacuum brazing furnace behind the briquetting and carry out heating soldering.The vacuum brazing temperature is 1050 ℃, temperature retention time 60min.
The thick 17vol.%SiC/2009Al composite panel of combined type welding tool agitating friction welding 3mm that adopts this embodiment to make, be 800 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 2000mm weld seam, this combined type welding tool mixing needle 3 and the shaft shoulder 2 parts are without noticeable wear, weld seam front end, tail end strength factor all reach more than 85% without significant change.
Comparative Examples 1
Soldering appliance is for adopting the monolithic construction of H13 steel making, and tool geometry size and embodiment 1 are identical, quench after the processing and temper, and hardness is HRC47.
Adopt H13 steel soldering appliance to carry out the agitating friction welding of the thick 17vol.%SiC/2009Al composite panel of 3mm, be 800 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 1000mm weld seam, heavy wear has occured in mixing needle, mixing needle weight reduces 24%, noticeable wear also occurs in shaft shoulder part, and front end weld strength coefficient is about 80%, tail end weld strength coefficient only about 62%.
The soldering appliance bare terminal end is selected the M42 steel, is of a size of Φ 20mm with shaft shoulder contact jaw.The shaft shoulder is selected Ti (C, N)/NiCr cermet, and hardness HRC56 is of a size of: cylindrical Φ 20mm, endoporus Φ 8mm, height 5mm.Cored solder adopts CuMnNi scolder, thickness 0.2mm.Soldering appliance bare terminal end, the shaft shoulder and scolder are coated with anti-welding stop-off gent at non-face of weld after assembling, and apply to put into vacuum brazing furnace behind the briquetting and carry out heating soldering.The vacuum brazing temperature is 1050 ℃, temperature retention time 60min.It is the Ti (C, N)/NiCr cermet of HRC63 that mixing needle is selected hardness, and size Φ 8 * 25mm, mixing needle adopt M6 to be bolted to the soldering appliance bare terminal end, as shown in Figure 2.The long 6mm of mixing needle projecting shaft shoulder portion.
Adopt that this embodiment makes compound-the thick 20vol.%SiC/2009Al composite panel of unitized soldering appliance agitating friction welding 6mm, be 1000 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 2000mm weld seam, this compound-combined welding tool pin and shaft shoulder part are without noticeable wear, weld seam front end, tail end strength factor change not obvious, all reach more than 80%.
Comparative Examples 2
Soldering appliance is for adopting the monolithic construction of M42 steel making, and tool geometry size and embodiment 2 are identical, quench after the processing and temper, and hardness is HRC66.
Adopt M42 steel soldering appliance to carry out the agitating friction welding of the thick 20vol.%SiC/2009Al composite panel of 6mm, be 1000 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 1000mm weld seam, heavy wear has occured in mixing needle, mixing needle weight reduces 21%, noticeable wear also occurs in shaft shoulder part, and front end weld strength coefficient is about 78%, tail end weld strength coefficient only about 63%.
The soldering appliance bare terminal end is selected the H13 steel, is of a size of Φ 20mm with shaft shoulder contact jaw.The shaft shoulder is selected the WC-Co carbide alloy, and hardness HRC62 is of a size of: cylindrical Φ 20mm, endoporus Φ 8mm, height 5mm.Cored solder adopts CuMnCo scolder, thickness 0.2mm.Soldering appliance bare terminal end, the shaft shoulder and scolder are coated with anti-welding stop-off gent at non-face of weld after assembling, and apply to put into vacuum brazing furnace behind the briquetting and carry out heating soldering.The vacuum brazing temperature is 1040 ℃, temperature retention time 60min.Mixing needle is selected the WC-Co carbide alloy with shaft shoulder same rigidity, and size Φ 8 * 25mm, mixing needle adopt M6 to be bolted to the soldering appliance bare terminal end, as shown in Figure 2.The long 6mm of mixing needle projecting shaft shoulder portion.
Adopt that this embodiment makes compound-the thick 15vol.%B of unitized soldering appliance agitating friction welding 6mm
4The C/6061Al composite panel, be 800 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 1000mm weld seam, this compound-combined welding tool pin and shaft shoulder part are without noticeable wear, weld seam front end, tail end strength factor change not obvious, all reach more than 80%.
Comparative Examples 3
Soldering appliance is for adopting the monolithic construction of H13 steel making, and tool geometry size and embodiment 3 are identical, quench after the processing and temper, and hardness is HRC47.
Adopt H13 steel soldering appliance to carry out the thick 15vol.%B of 6mm
4The agitating friction welding of C/6061Al composite panel, be 800 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 500mm weld seam, heavy wear has occured in mixing needle, mixing needle weight reduces 20%, noticeable wear also occurs in shaft shoulder part, and front end weld strength coefficient is about 78%, tail end weld strength coefficient only about 67%.
The soldering appliance bare terminal end is selected the M42 steel, is of a size of Φ 18mm with shaft shoulder contact jaw.The shaft shoulder is selected Ti (C, N)/NiCr cermet, and hardness HRC56 is of a size of: cylindrical Φ 18mm, endoporus Φ 7mm, height 5mm.Cored solder adopts CuMnNi scolder, thickness 0.2mm.Soldering appliance bare terminal end, the shaft shoulder and scolder are coated with anti-welding stop-off gent at non-face of weld after assembling, and apply to put into vacuum brazing furnace behind the briquetting and carry out heating soldering.The vacuum brazing temperature is 1050 ℃, temperature retention time 60min.It is the Ti (C, N)/NiCr cermet of HRC63 that mixing needle is selected hardness, and size Φ 7 * 24mm, mixing needle adopt M6 to be bolted to the soldering appliance bare terminal end, as shown in Figure 2.The long 5mm of mixing needle projecting shaft shoulder portion.
Adopt that this embodiment makes compound-the thick 15vol.%SiC/AZ91 composite panel of unitized soldering appliance agitating friction welding 5mm, be 800 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 1000mm weld seam, this compound-combined welding tool pin and shaft shoulder part are without noticeable wear, weld seam front end, tail end strength factor change not obvious, all reach more than 82%.
Comparative Examples 4
Soldering appliance is for adopting the monolithic construction of M42 steel making, and tool geometry size and embodiment 4 are identical, quench after the processing and temper, and hardness is HRC66.
Adopt M42 steel soldering appliance to carry out the agitating friction welding of the thick 15vol.%SiC/AZ91 composite panel of 5mm, be 800 rev/mins, weldering speed under 100mm/ minute welding parameter at rotating speed, behind the continuous welding 500mm weld seam, heavy wear has occured in mixing needle, mixing needle weight reduces 14%, noticeable wear also occurs in shaft shoulder part, and front end weld strength coefficient is about 78%, tail end weld strength coefficient about 70%.
Claims (5)
1. one kind is used for the combined type welding tool that the metal-base composites agitating friction welds, it is characterized in that: this combined type welding tool is provided with bare terminal end, the shaft shoulder and mixing needle, the shaft shoulder is installed on the bare terminal end front end, mixing needle is plugged in the shaft shoulder and bare terminal end, the shaft shoulder of described soldering appliance and mixing needle adopt the high-strength wearable cermet material, the bare terminal end of soldering appliance adopts alloy tool steel, and soldering appliance is made of by the vacuum brazing connection is compound bi-material;
Described high-strength wearable cermet material is take ceramic particle as wild phase, take the refractory metal alloy as Binder Phase, by the preparation of powder metallurgy vacuum sintering method, hardness HRC54～65;
Described wild phase is Ti (C, N), and Binder Phase is Ni base alloy;
Described vacuum brazing temperature is 1000～1100 ℃, temperature retention time 30～60min.
2. described combined type welding tool for metal-base composites agitating friction welding according to claim 1, it is characterized in that, the described soldering appliance shaft shoulder and mixing needle are selected the cermet material of different hardness, and the shaft shoulder is slightly low with cermet hardness, and mixing needle is slightly high with cermet hardness.
3. described combined type welding tool for metal-base composites agitating friction welding according to claim 1 is characterized in that the shaft shoulder of described soldering appliance, mixing needle and bare terminal end adopt vacuum brazing method to connect, and select copper base or Nickel Matrix Solder.
4. described combined type welding tool for metal-base composites agitating friction welding according to claim 1, it is characterized in that, described soldering appliance only carries out vacuum brazing between the two with bare terminal end and the cermet shaft shoulder and is connected, and mixing needle adopts fastening bolt to fix.
5. described combined type welding tool for metal-base composites agitating friction welding according to claim 1 is characterized in that, that described metal-base composites refers to that various ceramic particles or whisker strengthen is aluminium base, magnesium base, copper base or Zinc-base compounded material.
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| CN103028838B (en) * | 2012-12-18 | 2014-10-08 | 哈尔滨工业大学 | Welding tool and method for electromagnetic plastic friction stir welding |
| CN103920984B (en) * | 2014-04-03 | 2016-01-13 | 长春三友汽车部件制造有限公司 | A kind of bi-material layers combined type stirring and friction-welding stirring-head and manufacturing process thereof |
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| CN107127455B (en) * | 2017-06-01 | 2018-10-19 | 长沙理工大学 | A kind of method of laser-agitating friction welding diamond tool |
| CN110216365B (en) * | 2019-05-29 | 2020-12-04 | 上海航天设备制造总厂有限公司 | Friction stir welding method of silicon carbide particle reinforced aluminum matrix composite |
| CN112139655B (en) * | 2020-09-27 | 2021-07-06 | 广东省科学院中乌焊接研究所 | Friction stir welding tool and friction stir welding device |
| GB202019612D0 (en) * | 2020-12-11 | 2021-01-27 | Element Six Uk Ltd | Friction stir welding tool assembly |
| CN112719568A (en) * | 2021-02-02 | 2021-04-30 | 铜陵学院 | Brazing friction stir welding stirring head with split type abrasive particles arranged in spiral order and machining method thereof |
| CN114054937A (en) * | 2022-01-11 | 2022-02-18 | 西安稀有金属材料研究院有限公司 | Friction stir welding method and strengthening process of tungsten-boron-aluminum composite shielding material |
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