CN106367638A - Automotive alloy and manufacturing method thereof - Google Patents

Automotive alloy and manufacturing method thereof Download PDF

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Publication number
CN106367638A
CN106367638A CN201610741706.2A CN201610741706A CN106367638A CN 106367638 A CN106367638 A CN 106367638A CN 201610741706 A CN201610741706 A CN 201610741706A CN 106367638 A CN106367638 A CN 106367638A
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CN
China
Prior art keywords
alloy
aluminium alloy
automobile
refining agent
aluminium
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Pending
Application number
CN201610741706.2A
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Chinese (zh)
Inventor
周发明
刘英海
纪志奇
罗素
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Guangzhou Hua Che Technology Co Ltd
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Guangzhou Hua Che Technology Co Ltd
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Priority to CN201610741706.2A priority Critical patent/CN106367638A/en
Publication of CN106367638A publication Critical patent/CN106367638A/en
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Classifications

    • 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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising

Abstract

The invention provides an automotive alloy. The automotive alloy is prepared from, by weight percent, 6.1%-6.9% of Si, 0-0.35% of Fe, 0-0.02% of Cu, 0.05%-0.15% of Mn, 1.2%-2.2% of Mg, 0.05%-0.15% of Zn, 0.31%-0.55% of Cr, 0-0.02% of Ni, 0.15%-0.28% of Ti, 0.012%-0.038% of Sn, 2%-2.5% of a refining agent and the balance Al. The mechanical property and formability of the automotive alloy are improved, and the automotive alloy is uniform in structure and stable in component; and a manufacturing method of the automotive alloy is simple in process and low in cost and is suitable for automobile/motorcycle/bicycle and 3C product parts.

Description

A kind of automobile-used aluminium alloy and its manufacture method
Technical field
The present invention relates to field of aluminum alloys, especially, it is related to a kind of automobile-used aluminium alloy and its manufacture method.
Background technology
Aluminium alloy density is low, but intensity is higher, and near or above high-quality steel, plasticity is good, can be processed into various section bars, tool Have excellent electric conductivity, heat conductivity and a corrosion stability, industrial widely use, usage amount is only second to steel.Some aluminium alloys can be adopted Obtain good mechanical performance, physical property and corrosion resistance with heat treatment.
Aluminium alloy, because of the feature of its high intensity and high rigidity, is widely used in all trades and professions, including machine components, flies Machine, automobile, precision instrument, radio component parts, building shell, machine casing, consumer electronicses, household electrical appliance etc..
At present, conventional car body panel aluminium alloy mainly has al-cu-mg base (2000 are), al-mg base (5000 are), al- Mg-si base (6000 are) alloy.Wherein 2000 be and 6000 be heat treatment can reinforced alloys, 5000 is to be that heat treatment can not be strong Alloy.2000 is that al-cu-mg alloy has good forgeability, high intensity and good welding performance, but its corrosion resistance Poor.5000 is al-mg based alloy, and its intensity, processability and corrosion resistance are all preferable, but its forgeability is poor, and office Domain delayed yield, and can not reinforced alloys for heat treatment.6000 is al-mg-si alloy, has suitable intensity and formability Can, and be can heat treatment alloy, therefore, the aluminium alloy for car body panel focuses primarily upon 6000 line aluminium alloys.
The following element that aluminium alloy includes: mg, si, cu, mn, ti etc., each element is not to isolate to work, and its impact is Connect each other, the number of any of which composition is some performances to alloy and brings change.In existing aluminium alloy All there is the space being lifted further at aspects such as mechanical property, processability, structural homogenity, segregations.
Content of the invention
Present invention aim at providing a kind of automobile-used aluminium alloy and its manufacture method, to solve technical problem.
A kind of automobile-used aluminium alloy, including the composition of following percentage by weight: si 6.1-6.9%, fe 0-0.35%, cu 0-0.02%, mn 0.05-0.15%, mg 1.2-2.2%, zn 0.05-0.15%, cr 0.31-0.55%, ni 0- 0.02%th, ti 0.15-0.28%, sn 0.012-0.038%, refining agent 2-2.5%, balance of al.
Preferably, described refining agent is potassium nitrate and graphite powder.
Preferably, in described refining agent, potassium nitrate, graphite powder weight ratio are (25-30): 1.
A kind of manufacture method of automobile-used aluminium alloy, comprises the following steps:
S1, press above-mentioned mass percent, a certain amount of aluflex, titanium-aluminium alloy, Cr-Al alloy and silicon are put in stove Heat up, furnace temperature increases to 880-1050 DEG C, adds remaining titanium-aluminium alloy, fine aluminium ingot after alloy melting, be molten into aluminum and close Golden liquid；
S2, the temperature of reduction aluminum alloy melt, to 730-770 DEG C, add spelter, MAG block, stirring, by essence in aluminum alloy melt Refining agent aluminium foil is wrapped, and is then pressed in aluminium liquid with bell jar, refine 8-10 minute, is skimmed；
S3, make solution temperature be maintained at 770-790 DEG C, stand 25-35 minute, cast after skimming obtains aluminium alloy.
Although not adding ferrum, copper and mickel element in the manufacture method of the aluminium alloy of the present invention, due to part material Middle may contain micro ferrum, copper and mickel element, therefore the aluminium alloy producing may contain micro ferrum, copper and mickel element.
Preferably, also include the b of 0.1-0.3% in described automobile-used aluminium alloy.
Preferably, add after alloy melting in described step s1 also includes boron powder.
Special refining agent selected by the aluminium alloy of the present invention, not only can remove the hydrogen within aluminium liquid and the oxidation folder swimming Slag, and contribute to various elements in aluminium alloy and react to each other, form the crystal grain of small diameter.
The method have the advantages that the mechanical property of automobile-used aluminium alloy of the present invention and processability are carried Rise, and even tissue, stable components, its manufacturing approach craft is simple, low cost it is adaptable to automobile motorcycle bicycle and 3c product parts.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages. The present invention is further detailed explanation below.
Specific embodiment
Hereinafter embodiments of the invention are described in detail, but the present invention can limit according to claim and cover Multitude of different ways implement.
Embodiment 1
A kind of automobile-used aluminium alloy, including the composition of following percentage by weight: si 6.5%, fe 0.32%, cu 0.01%, Mn 0.08%, mg 1.5%, zn 0.09%, cr 0.39%, ni 0.015%, ti 0.19%, sn 0.025%, refining agent 2.3%th, balance of al.
Described refining agent is potassium nitrate and graphite powder.
Potassium nitrate in described refining agent, graphite powder weight are than for 27: 1.
A kind of manufacture method of automobile-used aluminium alloy, comprises the following steps:
S1, press above-mentioned mass percent, a certain amount of aluflex, titanium-aluminium alloy, Cr-Al alloy and silicon are put in stove Heat up, furnace temperature increases to 980 DEG C, adds remaining titanium-aluminium alloy, fine aluminium ingot, be molten into aluminum alloy melt after alloy melting；
S2, the temperature of reduction aluminum alloy melt, to 750 DEG C, add spelter, MAG block, stirring, by refining agent in aluminum alloy melt Wrapped with aluminium foil, be then pressed in aluminium liquid with bell jar, refine 8.5 minutes, skimmed；
S3, make solution temperature be maintained at 780 DEG C, stand 32 minutes, cast after skimming obtains aluminium alloy.
Embodiment 2
A kind of automobile-used aluminium alloy, including the composition of following percentage by weight: si 6.9%, cu 0.02%, mn 0.05%, Mg 1.2%, zn 0.05%, cr 0.55%, ni 0.02%, ti 0.15%, sn 0.012%, refining agent 2.5%, surplus For al.
Described refining agent is potassium nitrate and graphite powder.
Potassium nitrate in described refining agent, graphite powder weight are than for 25: 1.
A kind of manufacture method of automobile-used aluminium alloy, comprises the following steps:
S1, press above-mentioned mass percent, a certain amount of aluflex, titanium-aluminium alloy, Cr-Al alloy and silicon are put in stove Heat up, furnace temperature increases to 1050 DEG C, adds remaining titanium-aluminium alloy, fine aluminium ingot, be molten into aluminum alloy melt after alloy melting；
S2, the temperature of reduction aluminum alloy melt, to 730 DEG C, add spelter, MAG block, stirring, by refining agent in aluminum alloy melt Wrapped with aluminium foil, be then pressed in aluminium liquid with bell jar, refine 10 minutes, skimmed；
S3, make solution temperature be maintained at 770 DEG C, stand 35 minutes, cast after skimming obtains aluminium alloy.
Embodiment 3
A kind of automobile-used aluminium alloy, including the composition of following percentage by weight: si 6.1%, fe 0.35%, mn 0.15%, Mg 2.2%, zn 0.05%, cr 0.31%, ti 0.28%, sn 0.038%, refining agent 2%, balance of al.
Described refining agent is potassium nitrate and graphite powder.
Potassium nitrate in described refining agent, graphite powder weight are than for 30: 1.
A kind of manufacture method of automobile-used aluminium alloy, comprises the following steps:
S1, press above-mentioned mass percent, a certain amount of aluflex, titanium-aluminium alloy, Cr-Al alloy and silicon are put in stove Heat up, furnace temperature increases to 880 DEG C, adds remaining titanium-aluminium alloy, fine aluminium ingot, be molten into aluminum alloy melt after alloy melting；
S2, the temperature of reduction aluminum alloy melt, to 770 DEG C, add spelter, MAG block, stirring, by refining agent in aluminum alloy melt Wrapped with aluminium foil, be then pressed in aluminium liquid with bell jar, refine 8 minutes, skimmed；
S3, make solution temperature be maintained at 790 DEG C, stand 25 minutes, cast after skimming obtains aluminium alloy.
Embodiment 4
A kind of automobile-used aluminium alloy, including the composition of following percentage by weight: si 6.3%, fe 0.22%, cu 0.01%, Mn 0.12%, mg 2.0%, zn 0.12%, cr 0.48%, ni 0.01%, ti 0.24%, sn 0.025%, b 0.15%th, refining agent 2.2%, balance of al.
Described refining agent is potassium nitrate and graphite powder.
Potassium nitrate in described refining agent, graphite powder weight are than for 26: 1.
A kind of manufacture method of automobile-used aluminium alloy, comprises the following steps:
S1, press above-mentioned mass percent, a certain amount of aluflex, titanium-aluminium alloy, Cr-Al alloy and silicon are put in stove Heat up, furnace temperature increases to 950 DEG C, adds remaining titanium-aluminium alloy, fine aluminium ingot, boron powder after alloy melting, be molten into aluminum and close Golden liquid；
S2, the temperature of reduction aluminum alloy melt, to 740 DEG C, add spelter, MAG block, stirring, by refining agent in aluminum alloy melt Wrapped with aluminium foil, be then pressed in aluminium liquid with bell jar, refine 9 minutes, skimmed；
S3, make solution temperature be maintained at 780 DEG C, stand 30 minutes, cast after skimming obtains aluminium alloy.
Hereinafter the aluminium alloy of embodiment 1-4 is tested,
Wherein, tensile strength and elongation are testing under 25 degrees Celsius of experiment condition of the hot extrusion tubing of alloy Arrive；
Average grain size uses observation by light microscope.Alloy is carried out being electrolysed after 0.05-0.1mm mechanical lapping The surface of etching, cuts method using line and is measured on the extrusion direction of this embodiment alloy or length direction.Measured length is 0.2mm, each 3 of each visual field, observe 5 visuals field altogether.Therefore always measuring line length is 0.2mm × 15=3mm.Average crystallite Particle diameter is to cut method using above-mentioned line, measures same any 5 positions intercepting test film, average using 15 intercepting test films Value.
Test result is as shown in table 1:
Tensile strength (mpa) Elongation (%) Average grain size (μm)
Embodiment 1 395 12.5 17.5
Embodiment 2 385 11.0 17.5
Embodiment 3 380 11.5 17.3
Embodiment 4 525 13.2 5.8
By test data it is recognised that after adding b element, average grain size is obviously reduced, tensile strength and elongation Also increase.Possible correlation theory can be made explanations below:
After adding b element, heterogeneous nucleation is occurred to generate m during the course of the reaction2B structure (m is various metallic elements), thus Change crystal structure, reduce crystallite dimension, improve tensile strength and the elongation of alloy.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (7)

1. a kind of automobile-used aluminium alloy is it is characterised in that include the composition of following percentage by weight: si 6.1-6.9%, fe 0- 0.35%th, cu 0-0.02%, mn 0.05-0.15%, mg 1.2-2.2%, zn 0.05-0.15%, cr 0.31-0.55%, Ni 0-0.02%, ti0.15-0.28%, sn 0.012-0.038%, refining agent 2-2.5%, balance of al.
2. as claimed in claim 1 automobile-used aluminium alloy it is characterised in that described refining agent is potassium nitrate and graphite powder.
3. as claimed in claim 1 automobile-used aluminium alloy it is characterised in that potassium nitrate, graphite powder weight in described refining agent Than for (25-30): 1.
4. as claimed in claim 1 automobile-used aluminium alloy it is characterised in that also including 0.1- in described automobile-used aluminium alloy 0.3% b.
5. a kind of manufacture method of automobile-used aluminium alloy is it is characterised in that comprise the following steps:
S1, press above-mentioned mass percent, by a certain amount of aluflex, titanium-aluminium alloy, Cr-Al alloy and silicon put in stove heat up, Furnace temperature increases to 880-1050 DEG C, adds remaining titanium-aluminium alloy, fine aluminium ingot, be molten into aluminum alloy melt after alloy melting；
S2, the temperature of reduction aluminum alloy melt, to 730-770 DEG C, add spelter, MAG block, stirring, by refining agent in aluminum alloy melt Wrapped with aluminium foil, be then pressed in aluminium liquid with bell jar, refine 8-10 minute, skimmed；
S3, make solution temperature be maintained at 770-790 DEG C, stand 25-35 minute, cast after skimming obtains aluminium alloy.
6. as claimed in claim 5 the manufacture method of automobile-used aluminium alloy it is characterised in that treating in described step s1 that alloy melts Add after change also includes boron powder.
7. as claimed in claim 5 the manufacture method of automobile-used aluminium alloy it is characterised in that comprising the following steps:
S1, press above-mentioned mass percent, by a certain amount of aluflex, titanium-aluminium alloy, Cr-Al alloy and silicon put in stove heat up, Furnace temperature increases to 950 DEG C, adds remaining titanium-aluminium alloy, fine aluminium ingot, boron powder, be molten into aluminum alloy melt after alloy melting；
S2, the temperature of reduction aluminum alloy melt, to 740 DEG C, add spelter, MAG block, stirring, by refining agent aluminum in aluminum alloy melt Paper tinsel is wrapped, and is then pressed in aluminium liquid with bell jar, refine 9 minutes, is skimmed；
S3, make solution temperature be maintained at 780 DEG C, stand 30 minutes, cast after skimming obtains aluminium alloy；
Described automobile-used aluminium alloy, including the composition of following percentage by weight: si 6.3%, fe 0.22%, cu 0.01%, mn 0.12%th, mg 2.0%, zn 0.12%, cr 0.48%, ni 0.01%, ti 0.24%, sn 0.025%, b 0.15%, Refining agent 2.2%, balance of al；
Described refining agent is potassium nitrate and graphite powder；
Potassium nitrate in described refining agent, graphite powder weight are than for 26: 1.
CN201610741706.2A 2016-08-28 2016-08-28 Automotive alloy and manufacturing method thereof Pending CN106367638A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107937770A (en) * 2017-11-23 2018-04-20 湖州亨达铝业有限公司 A kind of preparation method of highly corrosion resistant marine aluminium alloy
CN108085521A (en) * 2017-11-20 2018-05-29 湖州亨达铝业有限公司 A kind of preparation method of the Automobile Plate aluminium alloy of high ductibility
CN108085522A (en) * 2017-11-23 2018-05-29 湖州亨达铝业有限公司 A kind of preparation method of wheel hub high-strength aluminum alloy
CN108165783A (en) * 2017-11-20 2018-06-15 湖州亨达铝业有限公司 A kind of preparation method of bicycle use aluminium alloy
CN108531789A (en) * 2018-06-04 2018-09-14 合肥大麦灯箱器材有限公司 A kind of high-strength endurance aluminum alloy doorframe and its preparation process
CN109852852A (en) * 2017-11-24 2019-06-07 Sj技术股份有限公司 High strength die-casting aluminium alloy and preparation method and aluminium alloy casting piece manufacturing method

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108085521A (en) * 2017-11-20 2018-05-29 湖州亨达铝业有限公司 A kind of preparation method of the Automobile Plate aluminium alloy of high ductibility
CN108165783A (en) * 2017-11-20 2018-06-15 湖州亨达铝业有限公司 A kind of preparation method of bicycle use aluminium alloy
CN107937770A (en) * 2017-11-23 2018-04-20 湖州亨达铝业有限公司 A kind of preparation method of highly corrosion resistant marine aluminium alloy
CN108085522A (en) * 2017-11-23 2018-05-29 湖州亨达铝业有限公司 A kind of preparation method of wheel hub high-strength aluminum alloy
CN109852852A (en) * 2017-11-24 2019-06-07 Sj技术股份有限公司 High strength die-casting aluminium alloy and preparation method and aluminium alloy casting piece manufacturing method
CN108531789A (en) * 2018-06-04 2018-09-14 合肥大麦灯箱器材有限公司 A kind of high-strength endurance aluminum alloy doorframe and its preparation process

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Application publication date: 20170201