CN103305726B - Method for preparing nanoscale silicon carbide aluminum alloy bar - Google Patents

Method for preparing nanoscale silicon carbide aluminum alloy bar Download PDF

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CN103305726B
CN103305726B CN201310260284.3A CN201310260284A CN103305726B CN 103305726 B CN103305726 B CN 103305726B CN 201310260284 A CN201310260284 A CN 201310260284A CN 103305726 B CN103305726 B CN 103305726B
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silicon carbide
gross weight
nanometer silicon
aluminium alloy
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CN103305726A (en
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孙飞
赵勇
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SUZHOU JINCANG ALLOY NEW-MATERIAL Co Ltd
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SUZHOU JINCANG ALLOY NEW-MATERIAL Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/04Making alloys by powder metallurgy
    • C22C1/0408Light metal alloys
    • C22C1/0416Aluminium-based alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/10Alloys containing non-metals
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/10Alloys containing non-metals
    • C22C1/1036Alloys containing non-metals starting from a melt
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium

Abstract

The invention provides a method for preparing a nanoscale silicon carbide aluminum alloy bar. A novel nanoscale silicon carbide aluminum alloy material is obtained by adding a nano silicon carbide material to an aluminum-based alloy material. The invention also provides the nanoscale silicon carbide aluminum alloy bar prepared by the method is prepared from the following components in percentage by total weight: 2-3% of nanoscale silicon carbide, 0.4-0.8% of magnesium, 0.05-0.3% of zinc, 0.05-0.25% of manganese, 0.05-0.1% of nickel, 0.02-0.1% of iron, no more than 0.2% of inevitable impurities, and the balance of aluminum. The invention also provides the method for preparing the nanoscale silicon carbide aluminum alloy bar. The nanoscale silicon carbide aluminum alloy bar provided by the invention can be applied to an aluminum alloy welding technology under the condition of not requiring thermal treatment means such as quenching and aging to improve the mechanical property. Thus, the production efficiency is improved; the production cost is saved; and the weldable novel aluminum alloy material can be finished.

Description

A kind of preparation method of nanometer silicon carbide aluminium alloy bars
Technical field
The nanometer silicon carbide aluminium alloy bars that the preparation method that the present invention relates to a kind of nanometer silicon carbide aluminium alloy bars sends out and prepares according to the method.
Background technology
Nanometer silicon carbide is a kind of by certain technical qualification, preparation on the basis of common carbofrax material and a kind of nano material of going out.It is high that nanometer silicon carbide has purity, and particle diameter is little, is evenly distributed, specific surface area is large, high surface, loose density is low, fabulous mechanics, calorifics, electricity and chemical property, namely have high rigidity, high-wearing feature and good self-lubricating, high thermoconductivity, low thermal coefficient of expansion and the feature such as hot strength is large.
Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, widely applies in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry.Along with science and technology and the develop rapidly of industrial economy in recent years, increasing to the demand of Welded structural part, make the Research on Weldability of aluminium alloy also thereupon deeply.The widespread use of aluminium alloy facilitates the development of aluminum alloy solder technology, and the development of welding technique has simultaneously expanded again the Application Areas of aluminium alloy, the therefore welding technique of aluminium alloy just one of focus becoming research.
But in the production process of aluminium alloy, need to improve mechanical property by heat treatment such as quenching and timeliness more just can be applied in Welded, a kind ofly do not need to improve its mechanical property by quenching and the heat treatment such as timeliness again if can provide and just can be applied to aluminum alloy materials in aluminum alloy solder technology, to enhance productivity greatly, save production cost further.
Summary of the invention
The object of this invention is to provide a kind of preparation method of high-strength light nanometer silicon carbide aluminium alloy bars, the nanometer silicon carbide aluminium alloy bars of preparation is made not only to have the characteristic that quality is light, plasticity good, corrosion stability is good of existing aluminum alloy materials, also do not need to improve its mechanical property by heat treatment such as quenching and timeliness more namely to may be used in aluminum alloy solder technology simultaneously, which thereby enhance production efficiency, save production cost, complete welding novel alloy aluminum alloy materials.
In order to realize foregoing invention object, the technical solution used in the present invention is as follows:
A preparation method for nanometer silicon carbide aluminium alloy bars, comprises the following steps:
1) nanometer silicon carbide accounting for gross weight 2-3% is taken according to part by weight, account for the magnesium of gross weight 0.4-0.8%, account for the zinc of gross weight 0.05-0.3%, account for the manganese of gross weight 0.05-0.25%, account for the nickel of gross weight 0.05-0.1%, account for the iron of gross weight 0.02-0.1%, account for the aluminium of gross weight 95.45-97.43%;
2) inserted in power frequency melting & holding furnace by described aluminium ingot and carry out melting, smelting temperature is: 730-770 DEG C, and smelting time is 20-30 minute, and at the temperature 5-10 minute of 550 DEG C, obtains aluminium liquid;
3) described nanometer silicon carbide, zinc ingot metal, ingot iron, manganese ingot and nickel ingot are added to described aluminium liquid surface, and the temperature of described power frequency melting & holding furnace is raised to about 750 DEG C, open electric furnace vibrating device and make alloy liquid fully mix 15-20 minute;
4) add magnesium ingot to step 3) described in alloy liquid in, be filled with subsequently in described power frequency melting & holding furnace the rare gas element that total amount is 0.01MPa-0.02MPa, and refining 10-15 minute;
5) to the sampling of refined alloy liquid, and its composition is analyzed;
6) will determine after composition analysis that the described refined alloy liquid of its chemical composition within the scope of regulation is cast into aluminium alloy cast rod.
7) peeling process is carried out to described aluminium alloy bars, then adopt the aluminium alloy bars after extrusion machine extruding peeling process.
8) alloy bar extruded is detected a flaw, then pack warehouse-in.
Further, described nanometer silicon carbide particle diameter is preferably 700nm-900nm.
Further, step 4) described rare gas element is preferably nitrogen.
Further, step 5) adopt the chemical composition of refined alloy liquid described in spectrometer analysis.
Further, step 6) adopt the mode of continuous casting to cast described aluminium alloy cast rod.
Further, step 6) the aluminium alloy cast rod diameter cast is preferably 10mm-150mm.
Further, step 7) described extrusion machine is preferably the single action extrusion machine of 1200 tons.
Further, step 5) adopt UT (Ultrasonic Testing).
According to nanometer silicon carbide aluminium alloy bars prepared by the preparation method of above-mentioned nanometer silicon carbide aluminium alloy bars, composed of the following components: nanometer silicon carbide accounts for the 2-3% of gross weight, magnesium accounts for the 0.4-0.8% of gross weight, zinc accounts for the 0.05-0.3% of gross weight, manganese accounts for the 0.05-0.25% of gross weight, nickel accounts for the 0.05-0.1% of gross weight, the inevitable impurity summation of 0.02-0.1% that iron accounts for gross weight account for gross weight≤0.2%, surplus is aluminium.
The present invention utilizes the purity of nm-class silicon carbide material high, particle diameter is little, be evenly distributed, specific surface area is large, high surface, loose density is low, the features such as fabulous mechanics, calorifics, electricity and chemical property, by adding nm-class silicon carbide material in the alloy material based on aluminium, obtain a kind of novel nanometer silicon carbide aluminum alloy materials.The characteristic that the quality that this nanometer silicon carbide alloy material not only has existing aluminum alloy materials is light, plasticity good, corrosion stability is good, does not also need to improve mechanical property by heat treatment such as quenching and timeliness more simultaneously; Enhance productivity thus and save production cost, complete welding novel alloy aluminum alloy materials.
Accompanying drawing explanation
Fig. 1 is preparation method's schema of nanometer silicon carbide aluminium alloy bars provided by the invention.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but and unrestricted range of application of the present invention.
embodiment 1
A kind of preparation method of nanometer silicon carbide aluminium alloy bars:
Step one: take according to part by weight and account for gross weight 2% nanometer silicon carbide, account for the magnesium of gross weight 0.4%, account for the zinc of gross weight 0.05%, account for the manganese of gross weight 0.05%, account for the nickel of gross weight 0.05%, account for the iron of gross weight 0.02%, account for the aluminium of gross weight 97.43%;
Step 2: inserted by aluminium ingot in power frequency melting & holding furnace and carry out melting, smelting temperature is: 730-770 DEG C, and smelting time is 20-30 minute, and at the temperature 5-10 minute of 550 DEG C, obtains aluminium liquid.
Step 3: nanometer silicon carbide, zinc ingot metal, ingot iron, manganese ingot and nickel ingot are added to above-mentioned aluminium liquid surface, and the temperature of power frequency melting & holding furnace is raised to about 750 DEG C, opens electric furnace vibrating device and makes alloy liquid fully mix 15-20 minute.
Step 4: add magnesium ingot to step 3) described in alloy liquid in, be filled with subsequently in described power frequency melting & holding furnace the rare gas element that total amount is 0.01MPa-0.02MPa, and refining 10-15 minute.
Step 5: to the sampling of refined alloy liquid, and its composition is analyzed.
Step 6: will determine after composition analysis that the refined alloy liquid of its chemical composition within the scope of regulation is cast into aluminium alloy cast rod.
Step 7: carry out peeling process to above-mentioned aluminium alloy bars, then adopts the aluminium alloy bars after extrusion machine extruding peeling process.
Step 8: the alloy bar extruded is detected a flaw, then packs warehouse-in.
According to nanometer silicon carbide aluminium alloy bars prepared by the preparation method of above-mentioned nanometer silicon carbide aluminium alloy bars, composed of the following components: nanometer silicon carbide accounts for 2% of gross weight, magnesium accounts for 0.4% of gross weight, zinc accounts for 0.05% of gross weight, manganese accounts for 0.05% of gross weight, and nickel accounts for 0.05% of gross weight, and iron accounts for 0.02% of gross weight, inevitable impurity summation account for gross weight≤0.2%, surplus is aluminium.
Embodiment 2
Above-mentioned nanometer silicon carbide aluminium alloy bars obtains by the following method:
Step one: take according to part by weight and account for gross weight 3% nanometer silicon carbide, account for the magnesium of gross weight 0.8%, account for the zinc of gross weight 0.3%, account for the manganese of gross weight 0.25%, account for the nickel of gross weight 0.1%, account for the iron of gross weight 0.1%, account for the aluminium of gross weight 95.45%, this nanometer silicon carbide particle diameter is preferably 700nm-900nm;
Step 2: inserted by aluminium ingot in power frequency melting & holding furnace and carry out melting, smelting temperature is: 730-770 DEG C, and smelting time is 20-30 minute, and at the temperature 5-10 minute of 550 DEG C, obtains aluminium liquid.
Step 3: nanometer silicon carbide, zinc ingot metal, ingot iron, manganese ingot and nickel ingot are added to above-mentioned aluminium liquid surface, and the temperature of power frequency melting & holding furnace is raised to about 750 DEG C, opens electric furnace vibrating device and makes alloy liquid fully mix 15-20 minute.
Step 4: add magnesium ingot to step 3) described in alloy liquid in, be filled with subsequently in described power frequency melting & holding furnace the nitrogen that total amount is 0.01MPa-0.02MPa, and refining 10-15 minute.
Step 5: to the sampling of refined alloy liquid, and its composition is analyzed.
Step 6: will determine after composition analysis that the refined alloy liquid of its chemical composition within the scope of regulation is cast into aluminium alloy cast rod.
Step 7: carry out peeling process to above-mentioned aluminium alloy bars, then adopts the aluminium alloy bars after extrusion machine extruding peeling process.
Step 8: the alloy bar extruded is detected a flaw, then packs warehouse-in.
According to nanometer silicon carbide aluminium alloy bars prepared by the preparation method of above-mentioned nanometer silicon carbide aluminium alloy bars, composed of the following components: nanometer silicon carbide accounts for 3% of gross weight, magnesium accounts for 0.8% of gross weight, zinc accounts for 0.3% of gross weight, manganese accounts for 0.25% of gross weight, and nickel accounts for 0.1% of gross weight, and iron accounts for 0.1% of gross weight, inevitable impurity summation account for gross weight≤0.2%, surplus is aluminium.
embodiment 3
A kind of preparation method of nanometer silicon carbide aluminium alloy bars:
Step one: take according to part by weight and account for gross weight 2% nanometer silicon carbide, account for the magnesium of gross weight 0.5%, account for the zinc of gross weight 0.15%, account for the manganese of gross weight 0.15%, account for gross weight 0.08%, nickel, account for the iron of gross weight 0.06%, account for the aluminium of gross weight 97.06%, this nanometer silicon carbide particle diameter is preferably 700nm-900nm;
Step 2: inserted by aluminium ingot in power frequency melting & holding furnace and carry out melting, smelting temperature is: 730-770 DEG C, and smelting time is 20-30 minute, and at the temperature 5-10 minute of 550 DEG C, obtains aluminium liquid.
Step 3: nanometer silicon carbide, zinc ingot metal, ingot iron, manganese ingot and nickel ingot are added to above-mentioned aluminium liquid surface, and the temperature of power frequency melting & holding furnace is raised to about 750 DEG C, opens electric furnace vibrating device and makes alloy liquid fully mix 15-20 minute.
Step 4: add magnesium ingot to step 3) described in alloy liquid in, be filled with subsequently in described power frequency melting & holding furnace the nitrogen that total amount is 0.01MPa-0.02MPa, and refining 10-15 minute.
Step 5: to the sampling of refined alloy liquid, and adopt the chemical composition of this refined alloy liquid of spectrometer analysis.
Step 6: will determine after composition analysis that to be cast into diameter be 10mm-150mm aluminium alloy cast rod to the refined alloy liquid of its chemical composition within the scope of regulation by the mode that casts continuously.
Step 7: carry out peeling process to above-mentioned aluminium alloy bars, then with the aluminium alloy bars after extrusion machine extruding peeling process.
Step 8: the alloy bar extruded is detected a flaw, then packs warehouse-in.
According to nanometer silicon carbide aluminium alloy bars prepared by the preparation method of above-mentioned nanometer silicon carbide aluminium alloy bars, composed of the following components: nanometer silicon carbide accounts for 2% of gross weight, magnesium accounts for 0.5% of gross weight, zinc accounts for 0.15% of gross weight, manganese accounts for 0.15% of gross weight, and nickel accounts for 0.08% of gross weight, and iron accounts for 0.06% of gross weight, inevitable impurity summation account for gross weight≤0.2%, surplus is aluminium.
embodiment 4
Above-mentioned nanometer silicon carbide aluminium alloy bars obtains by the following method:
Step one: take according to part by weight and account for gross weight 3% nanometer silicon carbide, account for the magnesium of gross weight 0.8%, account for the zinc of gross weight 0.1%, account for the manganese of gross weight 0.2%, account for the nickel of gross weight 0.1%, account for the iron of gross weight 0.02%, account for the aluminium of gross weight 95.78%, this nanometer silicon carbide particle diameter is preferably 700nm-900nm;
Step 2: inserted by aluminium ingot in power frequency melting & holding furnace and carry out melting, smelting temperature is: 730-770 DEG C, and smelting time is 20-30 minute, and at the temperature 5-10 minute of 550 DEG C, obtains aluminium liquid.
Step 3: nanometer silicon carbide, zinc ingot metal, ingot iron, manganese ingot and nickel ingot are added to above-mentioned aluminium liquid surface, and the temperature of power frequency melting & holding furnace is raised to about 750 DEG C, opens electric furnace vibrating device and makes alloy liquid fully mix 15-20 minute.
Step 4: add magnesium ingot to step 3) described in alloy liquid in, be filled with subsequently in described power frequency melting & holding furnace the nitrogen that total amount is 0.01MPa-0.02MPa, and refining 10-15 minute.
Step 5: to the sampling of refined alloy liquid, and adopt the chemical composition of this refined alloy liquid of spectrometer analysis.
Step 6: will determine after composition analysis that to be cast into diameter be 10mm-150mm aluminium alloy cast rod to the refined alloy liquid of its chemical composition within the scope of regulation by the mode that casts continuously.
Step 7: carry out peeling process to above-mentioned aluminium alloy bars, then adopts the aluminium alloy bars after the single action extrusion machine extruding peeling process of 1200 tons.
Step 8: UT (Ultrasonic Testing) is carried out to the alloy bar extruded, then packs warehouse-in.
According to nanometer silicon carbide aluminium alloy bars prepared by the preparation method of above-mentioned nanometer silicon carbide aluminium alloy bars, composed of the following components: nanometer silicon carbide accounts for 3% of gross weight, magnesium accounts for 0.8% of gross weight, zinc accounts for 0.1% of gross weight, manganese accounts for 0.2% of gross weight, and nickel accounts for 0.1% of gross weight, and iron accounts for 0.02% of gross weight, inevitable impurity summation account for gross weight≤0.2%, surplus is aluminium.
embodiment 5
Above-mentioned nanometer silicon carbide aluminium alloy bars obtains by the following method:
Step one: take according to part by weight and account for gross weight 2.5% nanometer silicon carbide, account for the magnesium of gross weight 0.6%, account for the zinc of gross weight 0.2%, account for the manganese of gross weight 0.18%, account for the nickel of gross weight 0.07%, account for the iron of gross weight 0.04%, account for the aluminium of gross weight 96.41%, this nanometer silicon carbide particle diameter is preferably 700nm-900nm;
Step 2: inserted by aluminium ingot in power frequency melting & holding furnace and carry out melting, smelting temperature is: 730-770 DEG C, and smelting time is 20-30 minute, and at the temperature 5-10 minute of 550 DEG C, obtains aluminium liquid.
Step 3: nanometer silicon carbide, zinc ingot metal, ingot iron, manganese ingot and nickel ingot are added to above-mentioned aluminium liquid surface, and the temperature of power frequency melting & holding furnace is raised to about 750 DEG C, opens electric furnace vibrating device and makes alloy liquid fully mix 15-20 minute.
Step 4: add magnesium ingot to step 3) described in alloy liquid in, be filled with subsequently in described power frequency melting & holding furnace the nitrogen that total amount is 0.01MPa-0.02MPa, and refining 10-15 minute.
Step 5: to the sampling of refined alloy liquid, and adopt the chemical composition of this refined alloy liquid of spectrometer analysis.
Step 6: will determine after composition analysis that to be cast into diameter be 10mm-150mm aluminium alloy cast rod to the refined alloy liquid of its chemical composition within the scope of regulation by the mode that casts continuously.
Step 7: carry out peeling process to above-mentioned aluminium alloy bars, then adopts the aluminium alloy bars after the single action extrusion machine extruding peeling process of 1200 tons.
Step 8: UT (Ultrasonic Testing) is carried out to the alloy bar extruded, then packs warehouse-in.
According to nanometer silicon carbide aluminium alloy bars prepared by the preparation method of above-mentioned nanometer silicon carbide aluminium alloy bars, composed of the following components: nanometer silicon carbide accounts for 2.5% of gross weight, magnesium accounts for 0.6% of gross weight, zinc accounts for 0.2% of gross weight, manganese accounts for 0.18% of gross weight, and nickel accounts for 0.07% of gross weight, and iron accounts for 0.04% of gross weight, inevitable impurity summation account for gross weight≤0.2%, surplus is aluminium.
The foregoing is only preferred embodiment of the present invention, be not used for limiting practical range of the present invention; If do not depart from the spirit and scope of the present invention, the present invention is modified or equivalent to replace, in the middle of the protection domain that all should be encompassed in the claims in the present invention.

Claims (9)

1. a preparation method for nanometer silicon carbide aluminium alloy bars, is characterized in that, comprises the following steps:
1) take according to part by weight and account for gross weight 2-3% nanometer silicon carbide, account for the magnesium of gross weight 0.4-0.8%, account for the zinc of gross weight 0.05-0.3%, account for the manganese of gross weight 0.05-0.25%, account for the nickel of gross weight 0.05-0.1%, account for the iron of gross weight 0.02-0.1%, account for the aluminium of gross weight 95.45-97.43%;
2) inserted in power frequency melting & holding furnace by aluminium ingot and carry out melting, smelting temperature is: 730-770 DEG C, and smelting time is 20-30 minute, and at the temperature 5-10 minute of 550 DEG C, obtains aluminium liquid;
3) described nanometer silicon carbide, zinc ingot metal, ingot iron, manganese ingot and nickel ingot are added to described aluminium liquid surface, and the temperature of described power frequency melting & holding furnace is raised to 750 DEG C, open electric furnace vibrating device and make alloy liquid fully mix 15-20 minute;
4) add magnesium ingot to step 3) described in alloy liquid in, be filled with subsequently in described power frequency melting & holding furnace the rare gas element that total amount is 0.01MPa-0.02MPa, and refining 10-15 minute, obtain refined alloy liquid;
5) to described refined alloy liquid sampling, and its composition is detected;
6) by described step 5) in determine its chemical composition regulation scope within described refined alloy liquid be cast into aluminium alloy cast rod;
7) peeling process is carried out to described aluminium alloy cast rod, then adopt the aluminium alloy bars after extrusion machine extruding peeling process;
8) aluminium alloy bars extruded is detected a flaw, then pack warehouse-in.
2. the preparation method of nanometer silicon carbide aluminium alloy bars as claimed in claim 1, it is characterized in that, described nanometer silicon carbide particle diameter is 700nm-900nm.
3. the preparation method of nanometer silicon carbide aluminium alloy bars as claimed in claim 1, is characterized in that, step 4) described in rare gas element be nitrogen.
4. the preparation method of nanometer silicon carbide aluminium alloy bars as claimed in claim 1, is characterized in that, step 5) comprise the chemical composition adopting refined alloy liquid described in spectrometer analysis further.
5. the preparation method of nanometer silicon carbide aluminium alloy bars as claimed in claim 1, is characterized in that, step 6) comprise further and adopt the mode of continuous casting to cast described aluminium alloy cast rod.
6. the preparation method of nanometer silicon carbide aluminium alloy bars as claimed in claim 1, is characterized in that, step 6) described aluminium alloy cast rod diameter is 10mm-150mm.
7. the preparation method of nanometer silicon carbide aluminium alloy bars as claimed in claim 1, is characterized in that, step 7) described extrusion machine is the single action extrusion machine of 1200 tons.
8. the preparation method of nanometer silicon carbide aluminium alloy bars as claimed in claim 1, is characterized in that, step 8) described in flaw detection mode for adopting UT (Ultrasonic Testing).
9. nanometer silicon carbide aluminium alloy bars prepared by the preparation method of the nanometer silicon carbide aluminium alloy bars according to any one of claim 1-8, it is characterized in that, composed of the following components: nanometer silicon carbide accounts for the 2-3% of gross weight, magnesium accounts for the 0.4-0.8% of gross weight, zinc accounts for the 0.05-0.3% of gross weight, manganese accounts for the 0.05-0.25% of gross weight, nickel accounts for the 0.05-0.1% of gross weight, iron accounts for the 0.02-0.1% of gross weight, inevitable impurity summation account for gross weight≤0.2%, surplus is aluminium.
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