CN110055478A - A kind of manufacture craft of aluminium alloy - Google Patents
A kind of manufacture craft of aluminium alloy Download PDFInfo
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- CN110055478A CN110055478A CN201910389249.9A CN201910389249A CN110055478A CN 110055478 A CN110055478 A CN 110055478A CN 201910389249 A CN201910389249 A CN 201910389249A CN 110055478 A CN110055478 A CN 110055478A
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- aluminium alloy
- liquid
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- extrusion cylinder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
Abstract
This application discloses a kind of manufacture crafts of aluminium alloy of technical field of alloy material, comprising the following steps: step 1, it is aluminium alloy bars by liquid alloy liquid founding that it is liquid alloy liquid that melting after evenly mixing, which is added in smelting furnace, in prepared aluminium alloy stock；Step 2, the aluminium alloy bars that founding is obtained are heated to 570~580 DEG C, keep the temperature 10 hours, are cooled to room temperature to obtain the aluminium alloy bars after homogeneous；Aluminium alloy bars is heated to be put into the extrusion cylinder that temperature is 390~410 DEG C after 450~470 DEG C and squeezed by step 3, and the outlet temperature of extrusion cylinder is 480~500 DEG C；Step 4 is formed by extrusion cylinder aluminium alloy bars after extruding using the mold that temperature is 380~410 DEG C；Step 5 carries out air-cooled processing to it after aluminium alloy bars molding.This programme solves the problems, such as that the prior art is easy to appear crackle when producing 5A02 type aluminium alloy.
Description
Technical field
The present invention relates to technical field of alloy material, and in particular to a kind of aluminium alloy and its manufacture craft.
Background technique
5A02 type aluminium alloy be using magnesium as aluminium alloy made of main alloy element, belong to heat treatment can not reinforced alloys,
It is a kind of good moderate strength aluminium alloy of corrosion resistance with good fatigue resistance and weldability, and identical
In the case of, weigh less than other series alloy profiles, be widely used in aviation, ship, household electrical appliances, communications and transportation, decoration and
The production of the aluminum alloy extrusion section bars such as welding material.Existing production technology: aluminium alloy bars is heated to 570~580 DEG C, heat preservation
It 8~10 hours, is cooled to room temperature to obtain the aluminium alloy bars after homogeneous；Aluminium alloy bars after homogeneous is heated to 450~470 DEG C
It is put into the extrusion cylinder that internal temperature is 390~410 DEG C afterwards and carries out fine and close extruding, the extrusion cylinder is that inside has the straight of aperture
Cylinder, extrusion cylinder outside are equipped with electric heating helix tube, and the outlet temperature of extrusion cylinder rises to 480~500 DEG C；After extrusion cylinder squeezes
Aluminium alloy bars using temperature be that 380~410 DEG C of mold carries out cooling molding；After aluminium alloy bars molding, wind is carried out to it
Cold treatment to room temperature, the mechanical property of 5A02 annealed state aluminium alloy extrusions obtained in this way can satisfy GB/T6892-2015's
Standard requirements, (i.e. tensile strength≤245Mpa, elongation require >=12%), but in extrusion process, due to containing, magnesium is higher (to be contained
Amount is substantially all 2%~8%, to obtain better tensile strength), resistance of deformation is big and compressive surface is easily cracked；Aluminium closes
Golden stick heating process is more difficult to control, is easy to cause heating process protection improper, causes burning；Shape product is in subsequent numerical control lathe
In bed process, it is easy to appear knife mark, even if still often there are tool marks after sandblasting, oxidation processes.
Summary of the invention
The invention is intended to provide a kind of manufacture craft of aluminium alloy, to solve the prior art when producing 5A02 type aluminium alloy
The problem of being easy to appear crackle.
In order to solve the above technical problem, the present invention provides following technical solutions: a kind of manufacture craft of aluminium alloy, including
Following steps,
Aluminium alloy bars is heated to 570~580 DEG C, keeps the temperature 10 hours, be cooled to room temperature to obtain the aluminium after homogeneous by step 1
Alloy bar；
Aluminium alloy bars after homogeneous is heated to be put into internal temperature after 450~470 DEG C to be 390~410 DEG C by step 2
Extrusion cylinder carry out fine and close extruding, the extrusion cylinder is the straight tube that there is aperture in inside, be equipped with electric heating helix tube outside extrusion cylinder,
The outlet temperature of extrusion cylinder rises to 480~500 DEG C；
Step 3 cools down by extrusion cylinder aluminium alloy bars after extruding using the mold that temperature is 380~410 DEG C
Molding；
After aluminium alloy bars molding, air-cooled processing is carried out to it to room temperature for step 4；
Following operation is executed before step 1:
It will be prepared by following aluminium alloy stock by mass fraction ratio: Si:0~0.2%, Fe:0~0.35%, Cu:0~
0.1%, Mn:0.17%~0.26%, Mg:2.0%~2.4%, Ti:0~0.1%, impurity 0~0.15%, remaining is Al,
It is liquid alloy liquid that melting after evenly mixing, which is added in smelting furnace, in above-mentioned aluminium alloy stock, is aluminium conjunction by liquid alloy liquid founding
Golden stick, the process conditions of founding are as follows: liquid alloy liquid temperature is 690~710 DEG C, 0.2~0.25Mpa of hydraulic pressure, cooling water temperature
25~35 DEG C, casting speed: 145~155mm/min.
The working principle of the invention and having the beneficial effect that be added in silumin a small amount of magnesium (about 0.2~
0.3%) intensity and yield limit, can be improved, improve the machinability of alloy, magnesium is it will be evident that every increasing to the reinforcing of aluminium
Add 1% magnesium, tensile strength just about increases 34Mpa, although the high aluminium alloy of content of magnesium has excellent corrosion resistance, it is cast
Make that performance is poor, intensity and attribute at high temperature is all low, and constriction coefficient is big when cooling, be also easy to produce crackle and formed it is loose, simultaneously
When casting in solidification process, inside ingot generates very big unbalanced stresses due to inhomogeneous cooling, and unbalanced stresses focus on
Some weakness of ingot casting generate stress and concentrate, and when stress has been more than the intensity or plastic limit of metal, then produce in weakness
Raw crackle.And this programme is when aluminium alloy bars is cast, in order to obtain higher tensile strength and more excellent corrosion resistance, while simultaneous
Having few crackle, the technique for first using founding, and joined hydraulic condition in founding, hydraulic pressure can generate strong supercooling, and due to
Melt flow rate increases, and the core activation of a large amount of heterogeneous forming cores in alloy subcooling films, alloy structure can be refined significantly,
A large amount of alloying elements are in transgranular solid solution, and the low melting point of grain boundaries mutually substantially reduces, and alloying elements distribution is uniform, therefore after solidification
Alloy high-temp intensity and plasticity increase, the anti-crack ability of aluminium alloy bars increases, and not only can use high magnalium and close
The advantage of gold, and avoid high-magnesium aluminum alloy and be easy to appear crackle, by testing the mechanical property of 5A02 aluminium alloy extrusions except full
The arm's length standard of sufficient GB/T 6,892 2015 requires outer (i.e. tensile strength >=245Mpa, elongation require >=12%), is squeezing
Not cracked in the process, extruding drag is small, and yield promotes 30%, does not occur tool marks after sandblasting oxidation.
Further, liquid alloy liquid is uniformly mixed using ultrasonic wave in step 1.The mode of ultrasonic wave is mixed
Close the gas that can be discharged in liquid aluminium alloy.
Detailed description of the invention
Fig. 1 is the surface texture figure of aluminium alloy in the embodiment of the present invention 1；
Fig. 2 is the surface texture figure of aluminium alloy in the embodiment of the present invention 3.
Specific embodiment
It is further described below by specific embodiment:
Embodiment 1:
Specific implementation process is as follows: a kind of manufacture craft of aluminium alloy, comprising the following steps:
Step 1 prepares the aluminium alloy stock of following mass component: Si0.1%, Fe0.15%, Cu0.05%,
Mn0.2%, Mg2.0%, Ti0.05%, impurity 0.1%, remaining is Al, and above-mentioned aluminium alloy stock is added in smelting furnace uniformly
Melting is liquid alloy liquid after mixing, is aluminium alloy bars, the process conditions of founding are as follows: liquid alloy liquid by liquid alloy liquid founding
Temperature be 690 DEG C, hydraulic pressure 0.2Mpa, 25 DEG C of cooling water temperature, casting speed: 145mm/min；
Step 2, the aluminium alloy bars that founding is obtained are heated to 570 DEG C, keep the temperature 10 hours, are cooled to room temperature to obtain homogeneous
Aluminium alloy bars afterwards；
Aluminium alloy bars after homogeneous is heated to be put into the extrusion cylinder that temperature is 390 DEG C after 450 DEG C and caused by step 3
Close extruding, extrusion cylinder are the straight tube that there is aperture in inside, are equipped with electric heating helix tube outside extrusion cylinder, the outlet temperature of extrusion cylinder is
480℃；
Step 4 carries out cooling molding using the mold that temperature is 380 DEG C by extrusion cylinder aluminium alloy bars after extruding；
After aluminium alloy bars molding, air-cooled processing is carried out to it to room temperature for step 5.
Embodiment 2:
Specific implementation process is as follows: a kind of manufacture craft of aluminium alloy, comprising the following steps:
Step 1 prepares the aluminium alloy stock of following mass component: Si0.2%, Fe0.35%, Cu0.1%,
Mn0.26%, Mg2.4%, Ti0.1%, impurity 0.15%, remaining is Al, and above-mentioned aluminium alloy stock is added in smelting furnace
Melting is liquid alloy liquid after even mixing, is aluminium alloy bars, the process conditions of founding are as follows: liquid alloy by liquid alloy liquid founding
Liquid temperature be 710 DEG C, hydraulic pressure 0.25Mpa, 35 DEG C of cooling water temperature, casting speed: 155mm/min；
Step 2, the aluminium alloy bars that founding is obtained are heated to 580 DEG C, keep the temperature 10 hours, are cooled to room temperature to obtain homogeneous
Aluminium alloy bars afterwards；
Aluminium alloy bars after homogeneous is heated to be put into the extrusion cylinder that temperature is 410 DEG C after 470 DEG C and caused by step 3
Close extruding, extrusion cylinder are the straight tube that there is aperture in inside, are equipped with electric heating helix tube outside extrusion cylinder, the outlet temperature of extrusion cylinder is
500℃；
Step 4 carries out cooling molding using the mold that temperature is 410 DEG C by extrusion cylinder aluminium alloy bars after extruding；
After aluminium alloy bars molding, air-cooled processing is carried out to it to room temperature for step 5.
Embodiment 3:
In the constant situation of other conditions, the step of various aluminium alloy stocks are not smelted into liquid alloy liquid, but
It directlys adopt aluminium alloy bars: aluminium alloy bars being heated to 570~580 DEG C, 10 hours is kept the temperature, is cooled to room temperature after obtaining homogeneous
Aluminium alloy bars；
Aluminium alloy bars after homogeneous is heated to be put into the fine and close extruding of extrusion cylinder progress that temperature is 390 DEG C after 450 DEG C,
Extrusion cylinder is the straight tube that there is aperture in inside, and electric heating helix tube is equipped with outside extrusion cylinder, and the outlet temperature of extrusion cylinder is 480 DEG C；
Cooling molding is carried out using the mold that temperature is 380 DEG C by extrusion cylinder aluminium alloy bars after extruding；
After aluminium alloy bars molding, air-cooled processing is carried out to it to room temperature.
Hardness and strength test is carried out to alloy product made from embodiment 1, embodiment 2 and embodiment 3, under being made
Table:
| Tensile strength (Mpa) | Elongation (%) | |
| Embodiment 1 | 253 | 13.3 |
| Embodiment 2 | 250 | 12.6 |
| Embodiment 3 | 251 | 12.5 |
Can with as can be seen from the above table, alloy product made from this programme in terms of tensile strength and elongation with existing production
There is no too big differences for technique (embodiment 3), but crackle is less.
Original mold made from embodiment 1 and embodiment 3 is placed under the high-power microscope of 10X40 and is observed, Fig. 1 and Fig. 2 are obtained:
Fig. 1 and Fig. 2 is comprehensively compared, it can be seen that the crackle of Fig. 1 is obviously fewer than the crackle of Fig. 2, this is because embodiment 1
Using the technique of founding, and it joined hydraulic condition in founding, so that the anti-crack ability of aluminium alloy bars increases.
Claims (2)
1. a kind of manufacture craft of aluminium alloy, includes the following steps,
Aluminium alloy bars is heated to 570~580 DEG C, keeps the temperature 10 hours, be cooled to room temperature to obtain the aluminium alloy after homogeneous by step 1
Stick；
Aluminium alloy bars after homogeneous is heated to be put into internal temperature after 450~470 DEG C and is 390~410 DEG C and squeezed by step 2
Pressure cylinder carries out fine and close extruding, and the extrusion cylinder is the straight tube that there is aperture in inside, is equipped with electric heating helix tube outside extrusion cylinder, squeezes
The outlet temperature of cylinder rises to 480~500 DEG C；
Step 3 cools down by extrusion cylinder aluminium alloy bars after extruding using the mold that temperature is 380~410 DEG C
Type；
After aluminium alloy bars molding, air-cooled processing is carried out to it to room temperature for step 4；
It is characterized in that, executing following operation before step 1:
It will be prepared by following aluminium alloy stock by mass fraction ratio: Si:0~0.2%, Fe:0~0.35%, Cu:0~
0.1%, Mn:0.17%~0.26%, Mg:2.0%~2.4%, Ti:0~0.1%, impurity 0~0.15%, remaining is Al, will
It is liquid alloy liquid that melting after evenly mixing, which is added in smelting furnace, in above-mentioned aluminium alloy stock, is aluminium alloy by liquid alloy liquid founding
Stick, the process conditions of founding are as follows: liquid alloy liquid temperature is 690~710 DEG C, 0.2~0.25Mpa of hydraulic pressure, cooling water temperature 25
~35 DEG C, casting speed: 145~155mm/min.
2. a kind of manufacture craft of aluminium alloy according to claim 1, it is characterised in that: use ultrasonic wave pair in step 1
Liquid alloy liquid is uniformly mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910389249.9A CN110055478A (en) | 2019-05-10 | 2019-05-10 | A kind of manufacture craft of aluminium alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910389249.9A CN110055478A (en) | 2019-05-10 | 2019-05-10 | A kind of manufacture craft of aluminium alloy |
Publications (1)
| Publication Number | Publication Date |
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| CN110055478A true CN110055478A (en) | 2019-07-26 |
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| CN201910389249.9A Pending CN110055478A (en) | 2019-05-10 | 2019-05-10 | A kind of manufacture craft of aluminium alloy |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4282044A (en) * | 1978-08-04 | 1981-08-04 | Coors Container Company | Method of recycling aluminum scrap into sheet material for aluminum containers |
| JPS6223973A (en) * | 1985-07-22 | 1987-01-31 | Kobe Steel Ltd | Manufacture of aluminum alloy for automobile wheel |
| US5516382A (en) * | 1991-03-14 | 1996-05-14 | Pechiney Rhenalu | Strong formable isotropic aluminium alloys for drawing and ironing |
| WO2002050329A1 (en) * | 2000-12-20 | 2002-06-27 | Alcan International Ltd. | Age-hardenable aluminium alloys |
| CN105945081A (en) * | 2016-05-20 | 2016-09-21 | 淮安和通汽车零部件有限公司 | Isothermal extrusion process based on temperature segmented control |
| CN108004443A (en) * | 2017-12-27 | 2018-05-08 | 东北轻合金有限责任公司 | A kind of manufacture method of aviation alloyed aluminium thin-wallconduit |
| CN108486436A (en) * | 2018-06-12 | 2018-09-04 | 中铝东南材料院（福建）科技有限公司 | A kind of high-performance aluminium alloy band and preparation method thereof |
| CN108642344A (en) * | 2018-05-30 | 2018-10-12 | 乳源东阳光优艾希杰精箔有限公司 | A kind of preparation method of aerosol bottle cap aluminium alloy |
-
2019
- 2019-05-10 CN CN201910389249.9A patent/CN110055478A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4282044A (en) * | 1978-08-04 | 1981-08-04 | Coors Container Company | Method of recycling aluminum scrap into sheet material for aluminum containers |
| JPS6223973A (en) * | 1985-07-22 | 1987-01-31 | Kobe Steel Ltd | Manufacture of aluminum alloy for automobile wheel |
| US5516382A (en) * | 1991-03-14 | 1996-05-14 | Pechiney Rhenalu | Strong formable isotropic aluminium alloys for drawing and ironing |
| WO2002050329A1 (en) * | 2000-12-20 | 2002-06-27 | Alcan International Ltd. | Age-hardenable aluminium alloys |
| CN105945081A (en) * | 2016-05-20 | 2016-09-21 | 淮安和通汽车零部件有限公司 | Isothermal extrusion process based on temperature segmented control |
| CN108004443A (en) * | 2017-12-27 | 2018-05-08 | 东北轻合金有限责任公司 | A kind of manufacture method of aviation alloyed aluminium thin-wallconduit |
| CN108642344A (en) * | 2018-05-30 | 2018-10-12 | 乳源东阳光优艾希杰精箔有限公司 | A kind of preparation method of aerosol bottle cap aluminium alloy |
| CN108486436A (en) * | 2018-06-12 | 2018-09-04 | 中铝东南材料院（福建）科技有限公司 | A kind of high-performance aluminium alloy band and preparation method thereof |
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Application publication date: 20190726 |