CN1895830A - Plasma-arc in-situ welding technology of granular enhanced aluminum-based composite material - Google Patents
Plasma-arc in-situ welding technology of granular enhanced aluminum-based composite material Download PDFInfo
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- CN1895830A CN1895830A CN 200610085570 CN200610085570A CN1895830A CN 1895830 A CN1895830 A CN 1895830A CN 200610085570 CN200610085570 CN 200610085570 CN 200610085570 A CN200610085570 A CN 200610085570A CN 1895830 A CN1895830 A CN 1895830A
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Abstract
An in-situ plasma arc welding technique for the particle reinforced Al-based composition includes such steps as conventional surface treating for removing oxidized film and attached substance, regulating welding current and ion gas flow, and plasma arc welding while adding Ti, Zr, B, Si, etc for high-temp reaction on Al, N and reinforcing particles to generate new reinforcing phase and suppress the generation of harmful Al4C3.
Description
Technical field
The invention belongs to the secondary operations technical field of aluminum matrix composite, relate to a kind of plasma-arc in-situ welding method of particle enhanced aluminum-based composite material.
Background technology
Particle enhanced aluminum-based composite material is owing to have excellent physics, mechanical property, and is widely used in fields such as space flight, aviation, automobile and manufacturing industry, is considered to a kind of new construction material with extensive potential application foreground.Wherein, the SiCp/Al based composites is the important particle enhanced aluminum-based composite material of a class.The same with other structural material, the practical application of SiCp/Al based composites often is subjected to the restriction of secondary operations processing performance.Because there is greatest differences in physical and chemical performance between this material wild phase and matrix, interfacial reaction at high temperature very easily takes place generate fragility phase Al
4C
3, not only be difficult to form the welding point of high-quality, and weld properties is seriously reduced, seriously restricted the application of SiCp/Al based composites.Since metal-base composites came out from the sixties in 20th century, the connection of particle enhanced aluminum-based composite material just was one of focus of this area research both at home and abroad always.In this respect, domestic had many relevant patent applications, wherein representational comprising:
Patent " non-continuous reinforced aluminium-based composite material tungsten electrode argon-arc welding seam original position the Enhancement Method " (patent No.: CN200510010266.5) has been applied in the ox Jinan-Tai'an.This patent is by filling the home position alloying element, electromagnetic mixing apparatus is installed on welding gun, adopt certain welding condition and post weld heat treatment technology, the problem that the strength of welded joint that solves aluminum matrix composite is low, welding point and mother metal performance differ greatly.The advantage of this patent be easy and simple to handle, strength of welded joint is high, welding point and strength of parent are approaching.It is introduced that by this technology, the strength of welded joint of aluminum matrix composite can reach 85% of strength of parent.
Xu Zhiwu, Yan Jiuchun, Ye Guangyu etc. have applied for patent " aluminum base compound material ultrasound-method for resistance welding " (patent No.: CN200510009958.8).This method has overcome the shortcoming that aluminum matrix composite must weld under vacuum environment; improve the wetability of filling scolder and aluminum matrix composite, realized the reasonable distribution of wild phase in whole welding line; particle obtains not have and strengthens the poly-weld seam of skew, has improved the joint combination property.
Huang Jihua, ten thousand clouds, Zhang Jiangang have applied for patent " a kind of silicon carbide granules reinforced aluminium base composite material connection method " (patent No.: CN200510011191.2), relate to the instantaneous liquid phase diffusion interconnection technique of SiCp/Al composite.The difficulty that this invention has been faced when not only having avoided high temperature melting welding SiCp/Al composite, but and and existing instantaneous liquid phase diffusion is connected compare SiCp/Al composite, connection temperature with syndeton complexity low, to mother metal damage little, to characteristics such as the surface preparation that is connected mother metal are less demanding.
From existing research work and patent analyses, the interconnection technique of particle enhanced aluminum-based composite material should possess several like this conditions: 1) can form good jointing, interfacial reaction is few; 2) must effectively avoid the oxidation of alloy matrix aluminum; 3) reduce the jointing place as far as possible strengthen the poly-partially of particle; 4) simple to operate, avoid using admixture as far as possible.All in all, the whole bag of tricks that proposes still can not reach above condition well at present, so development of new particle enhanced aluminum-based composite material interconnection technique has the meaning of particular importance.The present invention proposes a kind of method of utilizing plasma-arc in-situ welding particle enhanced aluminum-based composite material, does not also have relevant bibliographical information and patent application at present.
Summary of the invention
The invention provides a kind of particle enhanced aluminum-based composite material plasma-arc in-situ welding technology, promptly realize the new technology that original position is synthetic with the metallic element of aluminium or enhancing particle reaction formation wild phase by in the plasma arc welding (PAW) termination process, adding at high temperature.
The technical scheme that realizes above-mentioned purpose is:
The particle enhanced aluminum-based composite material mother metal is carried out conventional surface treatment, remove surface film oxide and attachment, with the nitrogen of argon gas+0～30% as ion gas, realization realizes PLASMA ARC WELDING to particle enhanced aluminum-based composite material, it is characterized in that: in welding process, interpolation can be at high temperature with aluminium, nitrogen or strengthen element ti that the particle reaction forms wild phase, Zr, B, Si etc. and alloy thereof, it can at high temperature form wild phase with aluminium, nitrogen or the reaction of enhancing particle, and suppresses harmful phase as Al
4C
3Generation, realize that the original position of particle enhanced aluminum-based composite material welding point is synthetic.The high temperature molten bath that it utilizes the plasma arc welding (PAW) termination process to form generates new wild phase.
The element that is added can add with the form of simple metal, also can Al base intermediate alloy or the form of metal oxide, salt add; Alloying element add fashionable can be with thread, strip and block or Powdered adding; The adding mode can be mechanical type or automation mode; For the even dispersion that guarantees original position synthesis particle with avoid particle thick, according to mother metal THICKNESS CONTROL welding current 80～150A, gas flow of ions amount 2～5L/min, the speed of welding 100～200mm/min of 2～4mm, the addition of alloying element is below 12%.
Compared with prior art, the present invention has the following advantages:
1), can reduce the scaling loss that strengthens particle (as SiC etc.), thereby suppress the formation of fragility phase effectively because the alloying element chemism height that adds.
2) owing to the bath temperature height, the alloy element of adding can fully react, and generates new wild phase, has remedied the humidification loss that original wild phase scaling loss causes, has improved the performance of welding point effectively.
3) the choose reasonable alloy element is convenient to control wild phase kind, size and quantity.Because being original position, newly-generated particle generates, good with the matrix alloy compatibility, the interface is clean, thereby the bond strength height.
4) newly-generated particle size is less, be evenly distributed, thereby guaranteed that joint has very high intensity and elastic modelling quantity.
In a word, adopt this technology can suppress the formation of weld defect well, improve the performance of welding point effectively.
Description of drawings
The weld seam micro-organization chart of Fig. 1 embodiment 1
The weld seam XRD analysis figure of Fig. 2 embodiment 1
The specific embodiment
Embodiment 1
To the SiCp/6061 composite, weldering is preceding with 150
#The sand papering mother metal is removed oxide-film, cleans with acetone then.Sample is after 150 ℃ of dryings, and the nitrogen that adopts argon gas+30% is as ion gas, and the gas flow of ions amount is 3L/min, and with the pure argon protection, welding current is 100A, and speed of welding is 150mm/min.In welding process, in welding pool, add the Al-10%Ti alloy silk of diameter 2mm.The welding back is to the welding point sample analysis, and the result shows: the welding point place has formed TiC, TiN, AlN and Al
3Ti etc. strengthen particle, the size of particle below 5 μ m, even particle distribution, the hot strength of welding point is about 230MPa, satisfies the requirement of strength of welding point.Constituent analysis shows that the average content of welding point part Ti element is 2.12%.
Embodiment 2
To the SiCp/6061 composite, weldering is preceding with 150
#The sand papering mother metal is removed oxide-film, cleans with acetone then.Sample adopts argon gas+20% nitrogen as ion gas after 150 ℃ of dryings, and the gas flow of ions amount is 1.5L/min, and with the pure argon protection, welding current is 100A, and speed of welding is 120mm/min.Add the Al-10%Ti-1%B alloy silk of diameter 1mm in welding process in welding pool, interpolation speed is 120mm/min.The welding back is to the welding point sample analysis, and the result shows: the welding point place has formed TiN, TiB
2, AlN and Al
3Ti etc. strengthen particle, and the size of particle is at 0.2-3 μ m, even particle distribution, and the hot strength of welding point is about 250MPa, satisfies the requirement of strength of welding point.Constituent analysis shows that the average content of welding point part Ti, B element is 4.02% and 0.41%.
Embodiment 3
To the SiCp/6061 composite, weldering is preceding with 150
#The sand papering mother metal is removed oxide-film, cleans with acetone then.Sample adopts argon gas as ion gas after 150 ℃ of dryings, and the gas flow of ions amount is 3L/min, and with the pure argon protection, welding current is 150A, and speed of welding is 100mm/min.In welding process, by argon gas mixing dust feeder, adding average grain diameter in welding pool is the ZrO powder of 0.2mm.The welding back is to the welding point sample analysis, and the result shows: the welding point place has formed ZrC, Al
3Zr and Al
2O
3Strengthen particle, the size of particle is at 0.1-5 μ m, and distribution of particles is more even, and the hot strength of welding point is about 235MPa, satisfies the requirement of strength of welding point.Constituent analysis shows that the average content of welding point part Zr element is 6.10%.
Embodiment 4
To Al
2O
3P/ A356 composite, weldering is preceding with 150
#The sand papering mother metal is removed oxide-film, cleans with acetone then.Sample adopts argon gas+20% nitrogen as ion gas after 150 ℃ of dryings, and the gas flow of ions amount is 4L/min, and with the pure argon protection, welding current is 100A, and speed of welding is 210mm/min.In welding process, in welding pool, add the Ti alloy silk of diameter 1.2mm.The welding back is to the welding point sample analysis, and the result shows: the welding point place has formed TiN, Al
3Ti strengthens particle, and the size of particle is at 0.2-2 μ m, even particle distribution, and the hot strength of welding point is about 240MPa, satisfies the requirement of strength of welding point.Constituent analysis shows that the average content of welding point part Ti element is 5.21%.
Embodiment 5
To Al
2O
3P/ A356 composite, weldering is preceding with 150
#The sand papering mother metal is removed oxide-film, cleans with acetone then.Sample is after 150 ℃ of dryings, and as protection gas, simultaneously as ion gas, the gas flow of ions amount is 2L/min with pure argon, and welding current is 120A, and speed of welding is 100mm/min.In welding process, in welding pool, add the ZrCO of the about 0.1mm of average grain diameter
3Powder.The welding back is to the welding point sample analysis, and the result shows: the welding point place has formed Al
3Zr and Al
2O
3Strengthen particle, the size of particle is at 0.1-5 μ m, even particle distribution, and the hot strength of welding point is about 260MPa, satisfies the requirement of strength of welding point.Constituent analysis shows that the average content of welding point part Zr element is 8.14%.
Embodiment 6
To the SiCp/6061 composite, weldering is preceding with 150
#The sand papering mother metal is removed oxide-film, cleans with acetone then.Sample adopts argon gas+15% nitrogen as ion gas after 150 ℃ of dryings, and the gas flow of ions amount is 3L/min, and with the pure argon protection, welding current is 100A, and speed of welding is 120mm/min.In welding process, in welding pool, add the Ti-15%Si alloy silk of diameter 0.8mm.The welding back is to the welding point sample analysis, the result shows: the welding point place exists SiC, TiN, AlN etc. to strengthen particle, and the size of particle is at 0.2-4 μ m, and distribution of particles is more even, the hot strength of welding point is about 247MPa, satisfies the requirement of strength of welding point.Constituent analysis shows that the average content of welding point part Ti, Si element is 4.59% and 2.22%.
Claims (3)
1, particle enhanced aluminum-based composite material plasma-arc in-situ welding method; it at first carries out conventional surface treatment to the particle enhanced aluminum-based composite material mother metal; remove surface film oxide and attachment; then with the nitrogen of argon gas+0～30% as ion gas; with pure argon as the protection gas; realization is characterized in that the PLASMA ARC WELDING of particle enhanced aluminum-based composite material: in welding process, add element ti, Zr, B, Si and alloy thereof.
2, particle enhanced aluminum-based composite material plasma-arc in-situ welding method according to claim 1 is characterized in that the element that added, adds with the form of simple metal, or adds with the form of Al base intermediate alloy or metal oxide, salt; Alloying element adds fashionable with thread, strip and block or Powdered adding; The adding mode is mechanical type or automation mode.
3, particle enhanced aluminum-based composite material plasma-arc in-situ welding method according to claim 1, it is characterized in that mother metal THICKNESS CONTROL welding current 80～150A, gas flow of ions amount 2～5L/min, speed of welding 100～200mm/min according to 2～4mm, the addition of control alloying element is below 12%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610085570 CN1895830A (en) | 2006-06-23 | 2006-06-23 | Plasma-arc in-situ welding technology of granular enhanced aluminum-based composite material |
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| CN 200610085570 CN1895830A (en) | 2006-06-23 | 2006-06-23 | Plasma-arc in-situ welding technology of granular enhanced aluminum-based composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598571A (en) * | 2016-01-21 | 2016-05-25 | 常熟理工学院 | Method for connecting TiB2/ZL115 aluminum matrix composites through TiB2 particles |
| CN105603355A (en) * | 2016-01-06 | 2016-05-25 | 江苏烁石焊接科技有限公司 | Method for achieving steel surface nitrogen increment through nitrogen arc and nitride in-situ metallurgy |
| CN110293304A (en) * | 2019-06-04 | 2019-10-01 | 南京理工大学 | A kind of SiCpParticle enhanced aluminum-based composite material electro-beam welding method |
-
2006
- 2006-06-23 CN CN 200610085570 patent/CN1895830A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105603355A (en) * | 2016-01-06 | 2016-05-25 | 江苏烁石焊接科技有限公司 | Method for achieving steel surface nitrogen increment through nitrogen arc and nitride in-situ metallurgy |
| CN105603355B (en) * | 2016-01-06 | 2018-01-05 | 江苏烁石焊接科技有限公司 | A kind of method that steel surface nitrogen pick-up is realized using nitrogen arc and nitride in-situ metallurgy |
| CN105598571A (en) * | 2016-01-21 | 2016-05-25 | 常熟理工学院 | Method for connecting TiB2/ZL115 aluminum matrix composites through TiB2 particles |
| CN110293304A (en) * | 2019-06-04 | 2019-10-01 | 南京理工大学 | A kind of SiCpParticle enhanced aluminum-based composite material electro-beam welding method |
| CN110293304B (en) * | 2019-06-04 | 2021-09-28 | 南京理工大学 | SiCpElectron beam welding method for particle reinforced aluminum-based composite material |
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