CN100348360C - Aluminum welding ring and flux core in use for welding joint of tubes made from aluminum and aluminum alloy, and preparation method - Google Patents
Aluminum welding ring and flux core in use for welding joint of tubes made from aluminum and aluminum alloy, and preparation method Download PDFInfo
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- CN100348360C CN100348360C CNB2005100104675A CN200510010467A CN100348360C CN 100348360 C CN100348360 C CN 100348360C CN B2005100104675 A CNB2005100104675 A CN B2005100104675A CN 200510010467 A CN200510010467 A CN 200510010467A CN 100348360 C CN100348360 C CN 100348360C
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Abstract
The present invention relates to a flux-cored aluminum welding ring used for aluminum and aluminum alloy pipe joint brazing and a preparation method thereof, which relates to a solder for aluminum and aluminum alloy pipe joint brazing. The present invention aims to solve the problems of flux waste and difficult residue cleaning existing in the prior art. The present invention forms a ring shape and the skin (1) of the present invention is made of aluminum-silicon alloy foil; the core part (2) of the present invention is composed of aluminum-silicon alloy wires and alloy powder, and the weight percentage of chemical components in the aluminum-silicon alloy foil and the aluminum-silicon alloy wires is that Al is from 86.5 to 97 percent, Si is from 3 to 13 percent, Sr is from 0.01 to 0.3 percent, and La is from 0.01 to 0.2 percent. The alloy powder is the eutectic of KAIF4 and K3AIF6 or is composed of the eutectic of KAIF4 and K3AIF6 and silicon powder, and the alloy powder occupies 5 to 15 of the total weight of a flux-cored aluminum welding ring. The procedure of the present invention sequentially comprises the smelting of aluminum-silicon alloy ingots, the preparation of strip-shaped aluminum silicon alloys and filiform aluminum silicon, the preparation of aluminum-silicon alloy foil and aluminum-silicon alloy wires, the thorough grinding and mix of the alloy powder, the manufacture of flux-cored wires and the manufacture of flux-cored aluminum welding rings. The present invention has the advantages of convenient use, no residue, flux saving, precise and bright joint, high efficiency, etc.
Description
Technical field
The present invention relates to be used for the scolder of aluminium and aluminium alloy pipe joint brazing.
Background technology
Closely during the last ten years, along with developing rapidly of automobile, air-conditioning, refrigeration industry, aluminium matter refrigeration accessory, the especially soldering of aluminium-alloy pipe joint and connector are by more and more widely employing.Al-si alloy filler metal is used in the soldering of aluminium alloy usually.Because aluminum alloy surface has the oxide-film of one deck densification, must add brazing flux during soldering, at present, brazing flux all manually adds during the aluminium-alloy pipe joint brazing, brazing flux often occurs and adds too much or add uneven phenomenon, has caused the waste of brazing flux on the one hand, residue too much is difficult to clean on the other hand, residue after adopting sour mixed liquor to soldering soaks to be removed when handling, and usually causes the corrosion of aluminum products, and often takes place to leak in the process under arms through the joint of acid soak.
Summary of the invention
Add the problem that brazing flux is wasted and residue is difficult to clean that brazing flux brought for solving existing hand formula, the invention provides a kind of medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing and preparation method thereof, the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing of the present invention is annular, it is made up of crust and core, crust is made with the alusil alloy paper tinsel, alusil alloy paper tinsel thickness T is 0.1～0.5mm, width W is 5～20mm, core is made up of alusil alloy silk and alloy powder, and the alusil alloy filament diameter is 0.6～1.5mm; The percentage by weight of each chemical composition is four kinds in above-mentioned alusil alloy paper tinsel and the alusil alloy silk, one: Al:86.5～97%, Si:3～13%, Sr:0.01～0.3%, La:0.01～0.2%, two: Al:76.5～96%, Si:3～13%, Sn:0.01～10%, Sr:0.01～0.3%, La:0.01～0.2%, three: Al:86.5～96.5%, Si:3～13%, Ga:0.01～0.2%, Sr:0.01～0.3%, La:0.01～0.2%, four: Al:86.5～96.5%, Si:3～13%, Sn:0.01～10%, Ga:0.01～0.2%, Sr:0.01～0.3%, La:0.01～0.2%; Above-mentioned alloy powder is KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight.The preparation method of medicine core aluminium weld-ring of the present invention carries out according to following step: one, the melting of alusil alloy: at first, commercial-purity aluminium is put into crucible, throw in the ice crystal coverture in the above, ice crystal accounts for 10～20% of furnace charge gross weight, after treating that fine aluminium melts fully, elemental silicon is thrown in the crucible, furnace temperature rises to 1150～1200 ℃, then, add refining flux, the weight of refining flux accounts for 1～3% of furnace charge gross weight, stirs slagging-off, add degassing refining agent again, the weight of degassing refining agent accounts for 0.1～0.2% of furnace charge gross weight, fully stirs, and is last, add in the crucible fast strontium and rare-earth elements of lanthanum successively, fully stir, be cooled to 700～850 ℃ after 3～5 minutes and come out of the stove, pour the molten aluminum silicon alloy that makes into tundish, pour into through funnel and to water mold, making wherein, the percentage by weight of each chemical composition is: Al:86.5～97%, Si:3～13%, Sr:0.01～0.3%, the alusil alloy ingot casting of La:0.01～0.2%; Two, extruding: rising head is removed the peel and cut to the alusil alloy ingot casting, in stove, be preheated to 350～420 ℃, the barrel of putting into extruder pushes, select the matrix of band and silk material, the matrix of extruder is preheated to 380～400 ℃, and barrel temperature is 300～350 ℃, and extrusion speed is 5～10cm/s, extrusion ratio is 200～300, is squeezed into banded alusil alloy and thread alusil alloy respectively; Three, foliation and wire drawing: select backing foliation machine for use, the banded alusil alloy that energising makes above-mentioned steps between pony press and the forming press-roller carries out preheating, preheat temperature is 180～220 ℃, mill speed is 10～20cm/s, and forming press-roller keeps cooling and is coated with lubricant, is rolled into the alusil alloy paper tinsel, the thread alusil alloy that energising makes above-mentioned steps between pony press and the moulding nib carries out preheating, preheat temperature is 180～220 ℃, and drawing speed is 10～30cm/s, is drawn into the alusil alloy silk; Four, the preparation of alloy powder: with the alloy powder raw material, fully grind through ball mill, making powder size is the alloy powder of 20nm～200 μ m, and described alloy powder is KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight; Five, the manufacturing of medicine core aluminium weld-ring: drug of choice core electric welding wire product line, by format roll the alusil alloy paper tinsel that step 3 makes is carried out drawing, the format roll groove is rolled into U type groove with the alusil alloy paper tinsel, the alusil alloy silk that step 3 is made places the U type groove of alusil alloy paper tinsel, the alloy powder that step 4 is made joins in the U type groove continuously by funnel then, drawing speed is 10～30cm/s, forms flux-cored wire by the shaping mould hole, selects for use the system ring apparatus to make medicine core aluminium weld-ring at last.
Easy to use when the invention has the advantages that soldering aluminium and aluminium alloy pipe joint, no longer need to manually add brazing flux, avoided adding too much or add uneven problem, no residue, saved brazing flux, can obtain accurate bright joint because of manually adding the brazing flux that brazing flux causes; Soldered fitting place corrosion resistance is good, and brazed seam compactness is good.The present invention has improved production efficiency greatly applicable to multiple method for welding such as gas brazing, furnace brazing, high-frequency induction brazings.In alusil alloy, can reduce the fusion temperature of al-si alloy filler metal behind the adding tin by a relatively large margin, be particularly useful for the lower aluminium alloy brazing product of requirement brazing temperature; The adding of gallium, strontium and rare-earth elements of lanthanum has improved the microstructure of alusil alloy, has improved the processing characteristics and the serviceability of al-si alloy filler metal.
Description of drawings
Fig. 1 is the structural representation that is used for the medicine core aluminium weld-ring of aluminium and aluminium alloy pipe joint brazing of the present invention, and Fig. 2 is the A-A profile of Fig. 1, and Fig. 3 is the expanded view of crust 1 usefulness alusil alloy paper tinsel.
The specific embodiment
The specific embodiment one: (referring to Fig. 1-Fig. 3) the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing of present embodiment is annular, it is made up of crust 1 and core 2, crust 1 usefulness alusil alloy paper tinsel is made, alusil alloy paper tinsel thickness T is 0.1～0.5mm, width W is 5～20mm, core 2 is made up of alusil alloy silk and alloy powder, and the alusil alloy filament diameter is 0.6～1.5mm; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:86.5～97%, Si:3～13%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight, and powder size is 20nm～200 μ m.
The specific embodiment two: (percentage by weight of each chemical composition is in alusil alloy paper tinsel that is referring to the difference of the present embodiment of Fig. 1-Fig. 3) and the specific embodiment one and the alusil alloy silk: Al 88.9%, Si 11%, Sr 0.05%, La 0.05%, described alloy powder are KAlF
4And K
3AlF
6Eutectic, alloy powder account for 10% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment one.
The specific embodiment three: (percentage by weight of each chemical composition is in alusil alloy paper tinsel that is referring to the difference of the present embodiment of Fig. 1-Fig. 3) and the specific embodiment one and the alusil alloy silk: Al96.6%, Si2.9%, Sr 0.3%, La 0.2%, the weight ratio of each chemical composition is in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=10: 1, alloy powder account for 10% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment one.
The specific embodiment four: (percentage by weight of each chemical composition is in alusil alloy paper tinsel that is referring to the difference of the present embodiment of Fig. 1-Fig. 3) and the specific embodiment one and the alusil alloy silk: Al93.25%, Si6.5%, Sr 0.15%, La 0.1%, the weight ratio of each chemical composition is in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=10: 1, alloy powder account for 10% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment one.
The specific embodiment five: (referring to Fig. 1-Fig. 3) the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing of present embodiment is annular, it is made up of crust 1 and core 2, crust 1 usefulness alusil alloy paper tinsel is made, alusil alloy paper tinsel thickness T is 0.1～0.5mm, width W is 5～20mm, core 2 is made up of alusil alloy silk and alloy powder, and the alusil alloy filament diameter is 0.6～1.5mm; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:76.5～96%, Si:3～13%, Sn:0.01～10%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight, and powder size is 20nm～200 μ m.In alusil alloy, can reduce the fusion temperature of al-si alloy filler metal behind the adding tin by a relatively large margin, be particularly useful for the lower aluminium alloy brazing product of requirement brazing temperature.
The specific embodiment six: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment five is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 77.5%, Si13%, Sn 9%, Sr 0.3%, La 0.2%, described alloy powder are KAlF
4And K
3AlF
6Eutectic, alloy powder account for 5% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment five.
The specific embodiment seven: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment five is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 85.8%, Si 8%, Sn 6%, Sr 0.1%, La 0.1%, the weight ratio of each chemical composition is in the described alloy powder: KAlF
4And K
3AF
6Eutectic: silica flour=3: 1, alloy powder account for 8% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment five.
The specific embodiment eight: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment five is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 96.48%, Si 3%, Sn 0.5%, Sr 0.01%, La 0.01%, the weight ratio of each chemical composition is in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=1: 2, alloy powder account for 15% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment five.
The specific embodiment nine: (referring to Fig. 1-Fig. 3) the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing of present embodiment is annular, it is made up of crust 1 and core 2, crust 1 usefulness alusil alloy paper tinsel is made, alusil alloy paper tinsel thickness T is 0.1～0.5mm, width W is 5～20mm, core 2 is made up of alusil alloy silk and alloy powder, and the alusil alloy filament diameter is 0.6～1.5mm; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:86.5～96.5%, Si:3～13%, Ga:0.01～0.2%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight, and powder size is 20nm～200 μ m.In alusil alloy, can improve the microstructure of alusil alloy behind the adding gallium, improve the processing characteristics and the serviceability of al-si alloy filler metal.
The specific embodiment ten: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment nine is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 86.5%, Si 12.8%, Ga 0.2%, Sr 0.3%, La 0.2%, described alloy powder are KAlF
4And K
3AlF
6Eutectic, alloy powder account for 15% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment nine.
The specific embodiment 11: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment nine is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 91.65%, Si 8%, Ga 0.15%, Sr 0.1%, La 0.1%, the weight ratio of each chemical composition is in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=3: 1, alloy powder account for 8% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment nine.
The specific embodiment 12: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment nine is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al96.5%, Si3.38%, Ga 0.1%, Sr 0.01%, La 0.01%, the weight ratio of each chemical composition is in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=1: 2, alloy powder account for 5% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment nine.
The specific embodiment 13: (referring to Fig. 1-Fig. 3) the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing of present embodiment is annular, it is made up of crust 1 and core 2, crust 1 usefulness alusil alloy paper tinsel is made, alusil alloy paper tinsel thickness T is 0.1～0.5mm, width W is 5～20mm, core 2 is made up of alusil alloy silk and alloy powder, and the alusil alloy filament diameter is 0.6～1.5mm; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:86.5～96.5%, Si:3～13%, Sn:0.01～10%, Ga:0.01～0.2%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight, and powder size is 20nm～200 μ m.
The specific embodiment 14: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 13 is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 77.3%, Si13%, Sn 9%, Ga 0.2%, Sr 0.3%, La 0.2%, each chemical composition and weight ratio are in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=1: 1, alloy powder account for 5% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment 13.
The specific embodiment 15: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 13 is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 85.65%, Si8%, Sn 6%, Ga 0.15%, Sr 0.1%, La 0.1%, each chemical composition and weight ratio are in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=3: 1, alloy powder account for 8% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment 13.
The specific embodiment 16: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 13 is that the percentage by weight of each chemical composition in alusil alloy paper tinsel and the alusil alloy silk is: Al 96.38%, Si3%, Sn 0.5%, Ga 0.1%, Sr 0.01%, La 0.01%, each chemical composition and weight ratio are in the described alloy powder: KAlF
4And K
3AlF
6Eutectic: silica flour=1: 2, alloy powder account for 15% of medicine core aluminium weld-ring gross weight.Other composition is identical with the specific embodiment 13.
The specific embodiment 17: (referring to Fig. 1-Fig. 3) preparation method of the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing of present embodiment carries out according to following step: one, the melting of alusil alloy: at first, commercial-purity aluminium is put into crucible, throw in the ice crystal coverture in the above, ice crystal melts prior to fine aluminium in fusion process, float over above the alloy liquation, protection alloy liquation is not oxidized, ice crystal accounts for 10～20% of furnace charge gross weight, smelting equipment adopts power frequency heating furnace or resistance furnace, after treating that fine aluminium melts fully, elemental silicon is thrown in the crucible, furnace temperature rises to 1150～1200 ℃, then, add refining flux, the weight of refining flux accounts for 1～3% of furnace charge gross weight, stir slagging-off, add degassing refining agent again, the weight of degassing refining agent accounts for 0.1～0.2% of furnace charge gross weight, fully stir, at last, add in the crucible fast strontium and rare-earth elements of lanthanum successively, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, pour into through funnel and to water mold, making wherein, the percentage by weight of each chemical composition is: Al:86.5～97%, Si:3～13%, Sr:0.01～0.3%, the alusil alloy ingot casting of La:0.01～0.2%; Two, extruding: rising head is removed the peel and cut to the alusil alloy ingot casting, in stove, be preheated to 350～420 ℃, the barrel of putting into extruder pushes, select the matrix of band and silk material, the matrix of extruder is preheated to 380～400 ℃, and barrel temperature is 300～350 ℃, and extrusion speed is 5～10cm/s, extrusion ratio is 200～300, is squeezed into banded alusil alloy and thread alusil alloy respectively; During extruding, the preheat temperature of strict control ingot casting, it is thick that the too high or long-time preheating of preheat temperature will make the alusil alloy ingot casting produce crystal grain, influence processing and serviceability.Three, foliation and wire drawing: select backing foliation machine for use, the banded alusil alloy that energising makes above-mentioned steps between pony press and the forming press-roller carries out preheating, preheat temperature is 180～220 ℃, mill speed is 10～20cm/s, forming press-roller keeps cooling and is coated with lubricant preventing the alloy roll banding, be rolled into the alusil alloy paper tinsel, the thread alusil alloy that energising makes above-mentioned steps between pony press and the moulding nib carries out preheating, preheat temperature is 180～220 ℃, drawing speed is 10～30cm/s, is drawn into the alusil alloy silk; After backing and drawing, obtain the alusil alloy paper tinsel band and the alusil alloy silk of required dimensional accuracy, and can improve the microstructure and the performance of alusil alloy.Four, the preparation of alloy powder: with the alloy powder raw material, fully grind through ball mill, making powder size is the alloy powder of 20nm～200 μ m, and described alloy powder is KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight; Five, the manufacturing of medicine core aluminium weld-ring: the flux-cored wire moulding drawing production line of selecting for use Wuhan Ke Ao mechanical ﹠ electronic equipment corporation, Ltd to produce, by format roll the alusil alloy paper tinsel that step 3 makes is carried out drawing, the format roll groove is rolled into U type groove with the alusil alloy paper tinsel, the alusil alloy silk that step 3 is made places the U type groove of alusil alloy paper tinsel, the alloy powder that step 4 is made joins in the U type groove continuously by funnel then, drawing speed is 10～30cm/s, form flux-cored wire by the shaping mould hole, select for use the automatic rotatable ring forming machine QLIJ80 that wild mechanical Science and Technology Ltd. produces in the Lanxi City of Zhejiang to make medicine core aluminium weld-ring at last.
The specific embodiment 18: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 17 is to add in the crucible fast tin, strontium and rare-earth elements of lanthanum successively in step 1, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, after funnel is poured into and watered mold, making wherein, the percentage by weight of each chemical composition is: the alusil alloy ingot casting of Al:76.5～96%, Si:3～13%, Sn:0.01～10%, Sr:0.01～0.3%, La:0.01～0.2%.Other composition is identical with the specific embodiment nine with step.
The specific embodiment 19: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 17 is to add in the crucible fast gallium, strontium and rare-earth elements of lanthanum successively in step 1, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, after funnel is poured into and watered mold, making wherein, the percentage by weight of each chemical composition is: the alusil alloy ingot casting of Al:86.5～96.5%, Si:3～13%, Ga:0.01～0.2%, Sr:0.01～0.3%, La:0.01～0.2%.Other composition is identical with the specific embodiment nine with step.
The specific embodiment 20: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 17 is in step 1 tin, gallium, strontium and rare-earth elements of lanthanum add in the crucible successively fast, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, after funnel is poured into and watered mold, making wherein, the percentage by weight of each chemical composition is: Al:86.5～96.5%, Si:3～13%, Sn:0.01～10%, Ga:0.01～0.2%, Sr:0.01～0.3%, the alusil alloy ingot casting of La:0.01～0.2%.Other composition is identical with the specific embodiment nine with step.
The specific embodiment 21: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 17 is that the composition of described refining flux described in the step 1 and percentage by weight are: Na
3AlF
635～45%, NaCl 55～65%, and described degassing refining agent composition is a carbon trichloride.Other composition is identical with the specific embodiment nine with step.
The specific embodiment 22: (difference referring to the present embodiment of Fig. 1-Fig. 3) and the specific embodiment 17 is that the composition of degassing refining agent described in the step 1 is the dehydration zinc chloride.Other composition is identical with the specific embodiment nine with step.
Claims (10)
1, the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing, it is an annular, and it is made up of crust (1) and core (2), it is characterized in that crust (1) makes with the alusil alloy paper tinsel, and core (2) is made up of alusil alloy silk and alloy powder; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:86.5～97%, Si:3～13%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight.
2, the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing, it is an annular, and it is made up of crust (1) and core (2), it is characterized in that crust (1) makes with the alusil alloy paper tinsel, and core (2) is made up of alusil alloy silk and alloy powder; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:76.5～96%, Si:3～13%, Sn:0.01～10%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight.
3, the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing, it is an annular, and it is made up of crust (1) and core (2), it is characterized in that crust (1) makes with the alusil alloy paper tinsel, and core (2) is made up of alusil alloy silk and alloy powder; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:86.5～96.5%, Si:3～13%, Ga:0.01～0.2%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight.
4, the medicine core aluminium weld-ring that is used for the aluminium and aluminium alloy pipe joint brazing, it is an annular, and it is made up of crust (1) and core (2), it is characterized in that crust (1) makes with the alusil alloy paper tinsel, and core (2) is made up of alusil alloy silk and alloy powder; The percentage by weight of each chemical composition is in above-mentioned alusil alloy paper tinsel and the alusil alloy silk: Al:86.5～96.5%, Si:3～13%, Sn:0.01～10%, Ga:0.01～0.2%, Sr:0.01～0.3%, La:0.01～0.2%, above-mentioned alloy powder are KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight.
5, according to claim 1,2, the 3 or 4 described medicine core aluminium weld-rings that are used for the aluminium and aluminium alloy pipe joint brazing, it is characterized in that described alusil alloy paper tinsel thickness T is 0.1～0.5mm, width W is 5～20mm, the alusil alloy filament diameter is 0.6～1.5mm, and described powder size is 20nm～200 μ m.
6, the preparation method who is used for the medicine core aluminium weld-ring of aluminium and aluminium alloy pipe joint brazing, it is characterized in that it carries out according to following step: one, the melting of alusil alloy: at first, commercial-purity aluminium is put into crucible, throw in the ice crystal coverture in the above, ice crystal accounts for 10～20% of furnace charge gross weight, after treating that fine aluminium melts fully, elemental silicon is thrown in the crucible, furnace temperature rises to 1150～1200 ℃, then, add refining flux, the weight of refining flux accounts for 1～3% of furnace charge gross weight, stir slagging-off, add degassing refining agent again, the weight of degassing refining agent accounts for 0.1～0.2% of furnace charge gross weight, fully stir, at last, add in the crucible fast strontium and rare-earth elements of lanthanum successively, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, pour into through funnel and water mold, making wherein, the percentage by weight of each chemical composition is: Al:86.5～97%, Si:3～13%, Sr:0.01～0.3%, the alusil alloy ingot casting of La:0.01～0.2%; Two, extruding: rising head is removed the peel and cut to the alusil alloy ingot casting, in stove, be preheated to 350～420 ℃, the barrel of putting into extruder pushes, select the matrix of band and silk material, the matrix of extruder is preheated to 380～400 ℃, and barrel temperature is 300～350 ℃, and extrusion speed is 5～10cm/s, extrusion ratio is 200～300, is squeezed into banded alusil alloy and thread alusil alloy respectively; Three, foliation and wire drawing: select backing foliation machine for use, the banded alusil alloy that energising makes above-mentioned steps between pony press and the forming press-roller carries out resistance preheat, preheat temperature is 180～220 ℃, mill speed is 10～20cm/s, forming press-roller keeps cooling and is coated with lubricant, be rolled into the alusil alloy paper tinsel, the thread alusil alloy that energising makes above-mentioned steps between pony press and the moulding nib carries out resistance preheat, preheat temperature is 180～220 ℃, drawing speed is 10～30cm/s, is drawn into the alusil alloy silk; Four, the preparation of alloy powder: with the alloy powder raw material, fully grind through ball mill, making powder size is the alloy powder of 20nm～200 μ m, and described alloy powder is KAlF
4And K
3AlF
6Eutectic or by KAlF
4And K
3AlF
6Eutectic and silica flour form, by KAlF
4And K
3AlF
6Eutectic and the weight ratio of constituents of the alloy powder formed of silica flour be: KAlF
4And K
3AlF
6Eutectic: silica flour=1: (0.1～2), alloy powder account for 5～15% of medicine core aluminium weld-ring gross weight; Five, the manufacturing of medicine core aluminium weld-ring: drug of choice core electric welding wire product line, by format roll the alusil alloy paper tinsel that step 3 makes is carried out drawing, the format roll groove is rolled into U type groove with the alusil alloy paper tinsel, the alusil alloy silk that step 3 is made places the U type groove of alusil alloy paper tinsel, the alloy powder that step 4 is made joins in the U type groove continuously by funnel then, drawing speed is 10～30cm/s, forms flux-cored wire by the shaping mould hole, selects for use the system ring apparatus to make medicine core aluminium weld-ring at last.
7, the preparation method who is used for the medicine core aluminium weld-ring of aluminium and aluminium alloy pipe joint brazing according to claim 6, it is characterized in that in step 1 tin, strontium and rare-earth elements of lanthanum add in the crucible successively fast, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, after funnel is poured into and watered mold, making wherein, the percentage by weight of each chemical composition is: Al:76.5～96%, Si:3～13%, Sn:0.01～10%, Sr:0.01～0.3%, the alusil alloy ingot casting of La:0.01～0.2%.
8, the preparation method who is used for the medicine core aluminium weld-ring of aluminium and aluminium alloy pipe joint brazing according to claim 6, it is characterized in that in step 1 gallium, strontium and rare-earth elements of lanthanum add in the crucible successively fast, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, after funnel is poured into and watered mold, making wherein, the percentage by weight of each chemical composition is: Al:86.5～96.5%, Si:3～13%, Ga:0.01～0.2%, Sr:0.01～0.3%, the alusil alloy ingot casting of La:0.01～0.2%.
9, the preparation method who is used for the medicine core aluminium weld-ring of aluminium and aluminium alloy pipe joint brazing according to claim 6, it is characterized in that in step 1 tin, gallium, strontium and rare-earth elements of lanthanum add in the crucible successively fast, fully stir, being cooled to 700～850 ℃ after 3～5 minutes comes out of the stove, pour the molten aluminum silicon alloy that makes into tundish, after funnel is poured into and watered mold, making wherein, the percentage by weight of each chemical composition is: Al:86.5～96.5%, Si:3～13%, Sn:0.01～10%, Ga:0.01～0.2%, Sr:0.01～0.3%, the alusil alloy ingot casting of La:0.01～0.2%.
10, the preparation method who is used for the medicine core aluminium weld-ring of aluminium and aluminium alloy pipe joint brazing according to claim 6 is characterized in that the composition of described refining flux and percentage by weight are: Na
3AlF
635～45%, NaCl 55～65%, and described degassing refining agent composition is carbon trichloride or dehydration zinc chloride.
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|---|---|---|---|
| CNB2005100104675A CN100348360C (en) | 2005-10-25 | 2005-10-25 | Aluminum welding ring and flux core in use for welding joint of tubes made from aluminum and aluminum alloy, and preparation method |
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| CNB2005100104675A CN100348360C (en) | 2005-10-25 | 2005-10-25 | Aluminum welding ring and flux core in use for welding joint of tubes made from aluminum and aluminum alloy, and preparation method |
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| CN1759973A CN1759973A (en) | 2006-04-19 |
| CN100348360C true CN100348360C (en) | 2007-11-14 |
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Address after: 150001 Harbin, Nangang, West District, large straight street, No. 92 Co-patentee after: ZHEJIANG SELENO SCIENCE AND TECHNOLOGY CO.,LTD. Patentee after: HARBIN INSTITUTE OF TECHNOLOGY Address before: 150001 Harbin, Nangang, West District, large straight street, No. 92 Co-patentee before: Jinhua SELENO Brazing Alloys Manufacturing Co.,Ltd. Patentee before: Harbin Institute of Technology Address after: 150001 Harbin, Nangang, West District, large straight street, No. 92 Co-patentee after: Jinhua SELENO Brazing Alloys Manufacturing Co.,Ltd. Patentee after: HARBIN INSTITUTE OF TECHNOLOGY Address before: 150001 Harbin, Nangang, West District, large straight street, No. 92 Co-patentee before: Jinhua SELENO Brazing Alloys Manufacturing Co.,Ltd. Patentee before: Harbin Institute of Technology |
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