CN110195176A - A kind of high tough pack alloy and preparation method thereof - Google Patents

A kind of high tough pack alloy and preparation method thereof Download PDF

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Publication number
CN110195176A
CN110195176A CN201910556923.8A CN201910556923A CN110195176A CN 110195176 A CN110195176 A CN 110195176A CN 201910556923 A CN201910556923 A CN 201910556923A CN 110195176 A CN110195176 A CN 110195176A
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alloy
content
molten aluminum
aluminium
added
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孔令东
杨同
曹海旺
燕国同
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Shandong Yulong Gold And Pml Precision Mechanism Ltd
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Shandong Yulong Gold And Pml Precision Mechanism Ltd
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    • 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
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • 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
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • C22C1/1073—Infiltration or casting under mechanical pressure, e.g. squeeze casting
    • 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
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
    • C22C32/0063—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides based on SiC
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
    • C22C47/12—Infiltration or casting under mechanical pressure
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
    • C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
    • C22C49/04—Light metals
    • C22C49/06—Aluminium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

A kind of high tough pack alloy and preparation method thereof, it is characterized in that the mass percentage composition of each ingredient: Si 9-11.5%, Cu2-4%, Ni0.2-0.5%, Mg0.2-0.5%, Ti0.1-0.5%, Fe0.5-1.3%, Mn < 0.5%, Sr0.02-0.3%, SiC2-5%, Sm0.03-0.2%, remaining is aluminium；Compared with ADC12 alloy used at present, alloy of the invention improves intensity and toughness simultaneously, is more suitable for manufacturing die casing for automobile, the simple production process of alloy, equipment investment is few, technology stability is good, also reduces production cost.

Description

A kind of high tough pack alloy and preparation method thereof
Technical field
The present invention relates to a kind of pack alloys more particularly to a kind of high tough pack alloy and preparation method thereof.
Background technique
With the development of automobile industry, for auto parts requirement of the die casting in terms of mechanical property also increasingly The pack alloy of height, prior art production is difficult to meet the requirements.In order to improve pack alloy mechanics, thermal conductivity and endurance Performance, Al-Si series die-casting alloy aluminum is widely used.Currently, China's most commonly used aluminium alloy of die casting industry is The Al-Si-Cu system of Fe content 0.8%-1.3%, such as ADC12 pack alloy, but ADC12 alloy greatest problem be toughness not Enough, room temperature elongation is normally no higher than 2%, and intensity is to be improved, to enable aluminum alloy to die casting and obtain more on automobile Using, it is necessary to improve the toughness and intensity of aluminium alloy.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of high tough pack alloy and preparation method thereof, one is provided Kind toughness and all higher pack alloy of intensity and preparation method thereof.To achieve the above object, the technical side that the present invention takes Case are as follows: in a kind of high tough pack alloy of ADC12 alloy foundational development, suitable strontium, samarium and aluminium base is added and strengthens powder (SiCp/Al), the toughness and intensity of alloy be can be improved.
A kind of high tough pack alloy, material component and its mass percentage composition: silicone content 9-11.5%, copper content 2-4%, nickel content 0.2-0.5%, content of magnesium 0.2-0.5%, Ti content 0.1-0.5%, iron content 0.5-1.3%, manganese content < 0.5%, content of strontium 0.02-0.3%, carborundum content 2-5%, samarium content 0.03-0.2%, remaining is aluminium.
A kind of preparation method of high tough pack alloy, comprising the following steps:
(1) material prepares: standard alloy ingot ADC12, al-sr alloy, aluminium copper, mischmetal, slagging agent, High Purity Nitrogen Gas and aluminium base strengthen powder；
(2) it melts: fusing in melting furnace will be added after 100 ± 30 DEG C of raw material standards alloy pig ADC12 preheating, drying, At 720-780 DEG C the content of copper in aluminium copper adjustment alloy is added, aluminium copper is ground by when addition to be less than in Control for Kiln Temperature The bulk of 20mmd, and stir；
(3) powder is added: strengthening powder according to 2-5% addition aluminium base, when addition use nitrogen for carrier blowing indentation side Formula, adition process and movement of spinning, movement speed stand 15-20 minutes after 10-30cm/s, auger 10-15 minutes, Aluminium base reinforcing powder is diffused with alloy melt to react；
(4) molten aluminum is slightly refined: the slagging agent covering molten aluminum surface of 0.1-03% is added, is pressed into slagging agent using specific purpose tool Molten aluminum, and be sufficiently stirred 10 minutes, molten aluminum pulls dross out after standing 8-10 minutes, and 0.1-0.3% is added according to molten aluminum ratio Blocky al-sr alloy, 0.03-0.3% rare earth are uniformly added into smelting furnace, stir evenly standing 0.5 hour；
(5) aluminum anodizing: molten aluminum being put into and is subcontracted in week, and turnover wraps face and 16 mesh filter screens are arranged, and filter screen is answered when supporting It is made into basin type, meeting molten aluminum filtering can't be overflowed by strainer periphery, be passed through nitrogen essence to molten aluminum using outstanding blowing device of air Degasification, nitrogen pressure 0.2-0.3MPa are refined, graphite rotator revolving speed is 100-200r/min, and nitrogen outlet point is located at distance turnover It wraps at the position bottom 10-15cm, the degasification time is 10 minutes；
(6) die casting: alloy is put into machine side holding furnace, and Control for Kiln Temperature is at 630-660 DEG C, 170-230 DEG C of mold temperature, mold Cooling water, molten aluminum press-in die type chamber are passed through after normal, injection speed is 0.5-4 meter per second, casting pressure 70-95MPa, pressure Pickup after casting pressure maintaining 15-20 seconds.
α-Al the phase and silicon phase in the strontium of 0.02%-0.3% and the samarium energy refining alloy tissue of 0.03%-0.2% are added, α-Al phase secondary dendrite spacing reduces to 15 μm by 51 μm, and average unit cell size reduces to 40 μm by 90 μm, and Eutectic Silicon in Al-Si Cast Alloys is by coarse needle-shaped Become the lesser corynebacterium of size or spherical shape, and generates Al11Sm3Phase.Crystal grain refinement can be improved the toughness of alloy.
It adds suitable aluminium base and strengthens powder, by stirring from diffusion is melted, form reinforcing fiber in the alloy, generate alloy Reinforced phase nano-SiCp.By solution strengthening, the intensity and hardness of alloy can be improved.
Strength of alloy and elongation respectively reach 280MPa and 3.1%, and 22% He is respectively increased compared with ADC12 alloy 210%.With good ductility, wearability, air-tightness and machinability, mechanical property is substantially better than similar Al-Si-Cu and closes Gold can be used for automobile gearbox, motor body, air valve, direction device, piston, wheel hub.
Compared with prior art, the invention has the following advantages: compared with ADC12 alloy used at present, this hair Bright alloy improves intensity and toughness simultaneously, is more suitable for manufacturing die casing for automobile, the simple production process of alloy, equipment investment Less, technology stability is good, also reduces production cost.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, combined with specific embodiments below to this Invention is further described.
As shown in table 1, a kind of high tough pack alloy, material component and its mass percentage composition: silicone content 9- 11.5%, copper content 2-4%, nickel content 0.2-0.5%, content of magnesium 0.2-0.5%, Ti content 0.1-0.5%, iron content 0.5- 1.3%, manganese content < 0.5%, content of strontium 0.02-0.3%, carborundum content 2-5%, samarium content 0.03-0.2%, remaining is Aluminium.
Table 1:
Si% Cu% Ni% Mg% Ti% Fe% Mn% Sr%
9.0-11.5 2.0-4.0 0.2-0.5 0.2-0.5 0.1-0.5 0.5-1.3 < 0.5 0.02-0.3
SiC% Sm% Al%
2.0-5.0 0.03-0.2 Surplus
A kind of preparation method of high tough pack alloy, comprising the following steps:
(1) material prepares: standard alloy ingot ADC12, al-sr alloy, aluminium copper, mischmetal, slagging agent, High Purity Nitrogen Gas and aluminium base strengthen powder；
(2) it melts: fusing in melting furnace will be added after 100 ± 30 DEG C of raw material standards alloy pig ADC12 preheating, drying, At 720-780 DEG C the content of copper in aluminium copper adjustment alloy is added, aluminium copper is ground by when addition to be less than in Control for Kiln Temperature The bulk of 20mmd, and stir；
(3) powder is added: strengthening powder according to 2-5% addition aluminium base, when addition use nitrogen for carrier blowing indentation side Formula, adition process and movement of spinning, movement speed stand 15-20 minutes after 10-30cm/s, auger 10-15 minutes, Aluminium base reinforcing powder is diffused with alloy melt to react；
(4) molten aluminum is slightly refined: the slagging agent covering molten aluminum surface of 0.1-03% is added, is pressed into slagging agent using specific purpose tool Molten aluminum, and be sufficiently stirred 10 minutes, molten aluminum pulls dross out after standing 8-10 minutes, and 0.1-0.3% is added according to molten aluminum ratio Blocky al-sr alloy, 0.03-0.3% rare earth are uniformly added into smelting furnace, stir evenly standing 0.5 hour；
(5) aluminum anodizing: molten aluminum being put into and is subcontracted in week, and turnover wraps face and 16 mesh filter screens are arranged, and filter screen is answered when supporting It is made into basin type, meeting molten aluminum filtering can't be overflowed by strainer periphery, be passed through nitrogen essence to molten aluminum using outstanding blowing device of air Degasification, nitrogen pressure 0.2-0.3MPa are refined, graphite rotator revolving speed is 100-200r/min, and nitrogen outlet point is located at distance turnover It wraps at the position bottom 10-15cm, the degasification time is 10 minutes；
(6) die casting: alloy is put into machine side holding furnace, and Control for Kiln Temperature is at 630-660 DEG C, 170-230 DEG C of mold temperature, mold Cooling water, molten aluminum press-in die type chamber are passed through after normal, injection speed is 0.5-4 meter per second, casting pressure 70-95MPa, pressure Pickup after casting pressure maintaining 15-20 seconds.
Pack alloy will be obtained to take out, the sample of 5 tests is taken to do chemical composition analysis and Mechanics Performance Testing respectively. The mass percent result of chemical component is as follows:
Table 2:
Sample Si% Cu% Ni% Mg% Ti% Fe% Mn% Sr% SiC% Sm% Al%
1 9.3 2.6 0.31 0.33 0.21 0.71 0.31 0.15 2.1 0.12 Surplus
2 10.1 2.8 0.28 0.35 0.26 0.69 0.35 0.18 3.5 0.15 Surplus
3 10.0 3.1 0.33 0.34 0.28 0.68 0.29 0.13 4.8 0.13 Surplus
4 9.5 2.5 0.34 0.35 0.24 0.74 0.33 0.16 5.1 0.12 Surplus
5 9.8 3.0 0.26 0.29 0.23 0.71 0.36 0.15 6.5 0.14 Surplus
As can be seen from Table 2, the chemical component of 5 groups of samples meets design requirement, and the difference of chemical component is the content of SiC It is different.
The mechanical property result of 5 groups of samples is as follows:
Table 3:
Sample SiC/% Tensile strength/MPa Elongation percentage/% Elasticity modulus/GPa
1 2.1% 282 5.1 85
2 3.5% 296 5 92
3 4.8% 312 2.6 101
4 5.1% 320 1.9 113
5 6.5% 332 1.55 120
As can be seen from Table 3, as the raising of SiC content, tensile strength and elasticity modulus also increase accordingly, when SiC contains When amount is more than 3.5%, elongation percentage is reduced with the raising of SiC content, that is to say, that bright plasticity reduces, and can be obtained by table 3 Out, when SiC content is between 2-5%, the intensity of alloy is higher, while toughness is also preferable, when SiC content is more than 5%, closes Although the intensity of gold is higher, toughness decline is very fast, degraded toughness.
In order to further verify the influence of strontium and samarium to alloy ductility, change the content of strontium and samarium in the alloy, three groups of changes The results are shown in Table 4 for the mass percent studied point:
Table 4:
Sample Si% Cu% Ni% Mg% Ti% Fe% Mn% Sr% SiC% Sm% Al%
6 9.2 2.6 0.31 0.33 0.21 0.71 0.31 / 2.1 0.15 Surplus
7 9.1 2.8 0.28 0.35 0.26 0.69 0.35 0.20 2.5 / Surplus
8 9.5 2.5 0.32 0.31 0.25 0.74 0.29 / 2.3 / Surplus
Mechanics Performance Testing is carried out to said sample, the results are shown in Table 5 for mechanical property:
Table 5:
Sample Tensile strength/MPa Elongation percentage/% Elasticity modulus/GPa
6 285 2.7 105
7 290 2.4 109
8 280 1.6 118
The difference of 6,7, No. 8 samples is the content of strontium and samarium it can be seen from table 4 and table 5, and No. 8 samples do not add strontium And samarium, although tensile strength difference is little, elongation is lower, and elasticity modulus is larger, and plasticity is poor, and No. 6 samples only add Samarium, No. 7 samples are only added to strontium, and tensile strength is essentially identical, elongation percentage increases relative to No. 8 samples, elasticity modulus Decline, illustrates that No. 8 samples of plasticity ratio of No. 6 samples and No. 7 samples are good, but the plasticity not as good as sample 1 is good, illustrates while adding Strontium and samarium can be improved the plasticity of alloy.
The principle of the present invention is as follows: α-Al phase and silicon phase in addition strontium and samarium energy refining alloy tissue, and the two of α-Al phase Secondary interdendritic has refined unit cell dimension away from reduction, Eutectic Silicon in Al-Si Cast Alloys from it is coarse it is needle-shaped become the lesser corynebacterium of size or spherical shape, and And generate Al11Sm3Phase, crystal grain refinement can be improved the toughness of alloy；It adds suitable aluminium base and strengthens powder, melted certainly by stirring Diffusion, forms reinforcing fiber, the reinforced phase nano-SiCp for generating alloy can be improved alloy by solution strengthening in the alloy Intensity and hardness.The alloy that the tough pack alloy of height that i.e. present invention obtains more has compared to the prior art, not only intensity It improves, also improves the toughness of alloy, be particularly suited for the manufacture of die casing for automobile.
Compared with prior art, the invention has the following advantages: compared with ADC12 alloy used at present, this hair Bright alloy improves intensity and toughness simultaneously, is more suitable for manufacturing die casing for automobile, the simple production process of alloy, equipment investment Less, technology stability is good, also reduces production cost.
Using technical solutions according to the invention or those skilled in the art under the inspiration of technical solution of the present invention, Similar technical solution is designed, and reaches above-mentioned technical effect, is to fall into protection scope of the present invention.

Claims (2)

1. a kind of high tough pack alloy, it is characterized in that high tough die-cast aluminum alloy material component and its mass percent are such as Under: silicone content 9-11.5%, copper content 2-4%, nickel content 0.2-0.5%, content of magnesium 0.2-0.5%, Ti content 0.1-0.5%, iron contain 0.5-1.3% is measured, manganese content < 0.5%, content of strontium 0.02-0.3%, carborundum content 2-5%, samarium content 0.03-0.2%, remaining is Aluminium.
2. a kind of preparation method of the tough pack alloy of height as described in claim 1, it is characterized in that high tough pack alloy Preparation method comprise the steps of:
(1) material prepare: standard alloy ingot ADC12, al-sr alloy, aluminium copper, mischmetal, slagging agent, high pure nitrogen and Aluminium base strengthens powder；
(2) it melts: fusing, furnace temperature in melting furnace will be added after 100 ± 30 DEG C of raw material standards alloy pig ADC12 preheating, drying At 720-780 DEG C the content of copper in aluminium copper adjustment alloy is added, aluminium copper is ground by when addition to be less than in control The bulk of 20mmd, and stir；
(3) powder is added: strengthening powder according to 2-5% addition aluminium base, when addition use nitrogen for carrier blowing press mode, adds Enter process and movement of spinning, movement speed stands 15-20 minutes after 10-30cm/s, auger 10-15 minutes, aluminium base Reinforcing powder is diffused with alloy melt to react；
(4) molten aluminum is slightly refined: the slagging agent covering molten aluminum surface of 0.1-03% is added, slagging agent is pressed by molten aluminum using specific purpose tool, And be sufficiently stirred 10 minutes, molten aluminum pulls dross out after standing 8-10 minutes, and 0.1-0.3% bulk aluminium is added according to molten aluminum ratio Strontium alloy, 0.03-0.3% rare earth are uniformly added into smelting furnace, stir evenly standing 0.5 hour；
(5) aluminum anodizing: molten aluminum being put into and is subcontracted in week, and turnover wraps face and 16 mesh filter screens are arranged, and filter screen should be made into when supporting Basin type, meeting molten aluminum filtering can't be overflowed by strainer periphery, be passed through nitrogen refining to molten aluminum using outstanding blowing device of air and removed Gas, nitrogen pressure 0.2-0.3MPa, graphite rotator revolving speed are 100-200r/min, and nitrogen outlet point, which is located at, subcontracts bottom apart from week At the portion position 10-15cm, the degasification time is 10 minutes；
(6) die casting: alloy is put into machine side holding furnace, and Control for Kiln Temperature is at 630-660 DEG C, and 170-230 DEG C of mold temperature, mold is normal After be passed through cooling water, molten aluminum press-in die type chamber, injection speed is 0.5-4 meter per second, casting pressure 70-95MPa, and die casting is protected Pickup after pressure 15-20 seconds.
CN201910556923.8A 2019-06-25 2019-06-25 A kind of high tough pack alloy and preparation method thereof Pending CN110195176A (en)

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CN110804708A (en) * 2019-12-09 2020-02-18 宁波市佳利来机械制造有限公司 High-strength die-casting aluminum alloy, engine shell and manufacturing method of engine shell
CN110885941A (en) * 2019-12-30 2020-03-17 南京南超模具装备有限公司 High-toughness aluminum alloy material and preparation method thereof
CN111455233A (en) * 2020-05-27 2020-07-28 东莞市青鸟金属材料有限公司 High-thermal-conductivity aluminum alloy material and preparation method thereof

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CN110804708A (en) * 2019-12-09 2020-02-18 宁波市佳利来机械制造有限公司 High-strength die-casting aluminum alloy, engine shell and manufacturing method of engine shell
CN110885941A (en) * 2019-12-30 2020-03-17 南京南超模具装备有限公司 High-toughness aluminum alloy material and preparation method thereof
CN111455233A (en) * 2020-05-27 2020-07-28 东莞市青鸟金属材料有限公司 High-thermal-conductivity aluminum alloy material and preparation method thereof

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Application publication date: 20190903