CN108034853A - A kind of method of smelting for improving Light Aluminum Alloy intensity - Google Patents

A kind of method of smelting for improving Light Aluminum Alloy intensity Download PDF

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Publication number
CN108034853A
CN108034853A CN201711365038.9A CN201711365038A CN108034853A CN 108034853 A CN108034853 A CN 108034853A CN 201711365038 A CN201711365038 A CN 201711365038A CN 108034853 A CN108034853 A CN 108034853A
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CN
China
Prior art keywords
aluminum alloy
molten liquid
smelting
light aluminum
improving light
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CN201711365038.9A
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Chinese (zh)
Inventor
何启华
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Anhui Yucheng Guanghua Aluminum Co Ltd
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Anhui Yucheng Guanghua Aluminum Co Ltd
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Priority to CN201711365038.9A priority Critical patent/CN108034853A/en
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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
    • C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
    • 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
    • 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
    • C22C32/0068—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 nitrides

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Continuous Casting (AREA)

Abstract

The invention belongs to Light Aluminum Alloy melting technique field, and in particular to a kind of method of smelting for improving Light Aluminum Alloy intensity, including raw material prepares, prepared by molten liquid, molten liquid adjusts and processing, adds nano silicon nitride zinc powder, cast.The present invention has the following advantages compared with prior art：Scientific matching alloying element content in the present invention, each raw material is set effectively to dissolve, spread and absorb by the pre-heat treatment, effectively reduce insoluble Hard Inclusion and slag inclusion content, influence of the alumina inclusion to molten liquid is avoided, electromagnetic agitation makes being evenly distributed for alloying element provide the time, avoids the component segregation of alloying element, the addition of zinc nitride, the intensity and hardness for making gained aluminium alloy castings all have significant improvement, and shorten the time of melt process, obtain the stronger aluminum alloy materials of mechanical strength.

Description

A kind of method of smelting for improving Light Aluminum Alloy intensity
Technical field
The invention belongs to Light Aluminum Alloy melting technique field, and in particular to a kind of melting for improving Light Aluminum Alloy intensity Method.
Background technology
With expanding economy, for energy conservation and environmental protection, automobile generally uses light-weight design, and traditional automotive interior is used It is conventional means to be replaced with light metal stent in the retort stand of a large amount of parts of fixation, and metallic aluminium is with higher hardness, lighter Weight and relatively low cost be widely applied, although and metallic aluminium hardness is higher, the product of same specification compares metal Iron still suffers from certain gap, improves the intensity and toughness of Light Aluminum Alloy by varying melting condition in the prior art, and aluminium closes Golden liquid easily causes eutectic segregation before cast due to stirring uneven, and at Eutectic Silicon in Al-Si Cast Alloys concentration, the high brittleness of hardness is big, processing Tool wear is big, and the few position of Eutectic Silicon in Al-Si Cast Alloys forms solid solution soft spots, and intensity is low, and when processing not only easily glues knife, in cutting force Also easily machined surface can be made hickie occur under effect, in casting, often occur it is various be mingled with, including oxide folder Miscellaneous, Modeling Material and solvent slag inclusion etc., wherein, it is mingled with the most generally with aluminum oxide, oxide, which is mingled with, can influence aluminium alloy casting The mechanical property of part, therefore, it is necessary to the method for smelting to Light Aluminum Alloy further to study.
The content of the invention
The purpose of the present invention is for it is existing the problem of, there is provided it is a kind of improve Light Aluminum Alloy intensity method of smelting.
The present invention is achieved by the following technical solutions：A kind of method of smelting for improving Light Aluminum Alloy intensity, it is special Sign is, comprises the following steps：
（1）By weight, 0.6-1 parts of 74-80 parts of technical pure aluminium ingot, ferrite, the silicon for preparing raw material aluminum content >=99.7% contain 0.8-1.2 part of metallic silicon, the content of magnesium of amount >=99.3% are 0.2-0.6 parts of the commercial magnesium of 99.85-99.95%, nickel content >= 1.3-1.5 parts of 99.2% commercial nickel, is preheated 30-40 minutes in vacuum drying device using temperature as 360-460 DEG C, after the completion of Saved backup in the atmosphere of inert gases that temperature is 300-340 DEG C；
（2）Above-mentioned spare mixture is sent into smelting furnace, 870-940 DEG C is heated up to, is kept for 25-35 minutes, obtain molten liquid；
（3）Detection is sampled to molten liquid, adjustment molten liquid includes following percentage by weight：Iron 1.2-1.4%, silicon 1.1- 1.3%th, magnesium 0.6-0.8%, nickel 1.5-1.7%, surplus are inevitable impurity and aluminium；
（4）After carrying out degassing and purifying to molten liquid, the nanometer nitrogen equivalent to molten liquid weight 2.2-2.6% is added in a manner of fluidised form Change zinc powder, with permanent magnetism blender by clockwise stirring 20-40 minute, after the completion of temperature adjustment to 650-680 DEG C keep 15-25 divide Clock, then injects mixed liquor in mould, and Light Aluminum Alloy casting is made in cooling.
As further improvement of these options, the trade mark of the metallic silicon is Si-2202, Si-2503, Si-3303 Or any one in Si-331；The ferritic trade mark is 409 types or 410L types.
As further improvement of these options, the step（2）After the completion of skim to molten liquid surface, it is and right Take out the impurity of precipitation in molten liquid bottom.
As further improvement of these options, the step（4）Whipping process and insulating process slumpability Gas shield；The step（4）In the type of cooling be cooling water cooling, the temperature of the cooling water is 35-40 DEG C.
The present invention has the following advantages compared with prior art：Scientific matching alloying element content in the present invention, passes through preheating Processing makes each raw material effectively dissolve, spread and absorb, and effectively reduces insoluble Hard Inclusion and slag inclusion content, avoids alumina inclusion Influence to molten liquid, electromagnetic agitation make being evenly distributed for alloying element provide the time, avoid the component segregation of alloying element, nitrogen Change the addition of zinc, heterogeneous forming core core can be effectively increased in alloy graining process, so as to reach grain refining effect, enhancing is closed Golden intensity, and the element added can promote to form interstitial atom and gap phase, so as to make alloy can heat with higher Handling properties, the intensity and hardness for making gained aluminium alloy castings all have significant improvement, and shorten the time of melt process, Obtain the stronger aluminum alloy materials of mechanical strength.
Embodiment
Embodiment 1
A kind of method of smelting for improving Light Aluminum Alloy intensity, it is characterised in that comprise the following steps：
（1）By weight, prepare 0.8 part of 78 parts of technical pure aluminium ingot, the ferrite of raw material aluminum content >=99.7%, silicone content >= 99.3% 1 part of metallic silicon, 0.4 part of commercial magnesium, the commercial nickel 1.4 of nickel content >=99.2% that content of magnesium is 99.85-99.95% Part, preheated 35 minutes using temperature for 410 DEG C in vacuum drying device, after the completion of in temperature be 320 DEG C of atmosphere of inert gases Inside save backup；
（2）Above-mentioned spare mixture is sent into smelting furnace, 900 DEG C is heated up to, is kept for 30 minutes, obtain molten liquid；
（3）Detection is sampled to molten liquid, adjustment molten liquid includes following percentage by weight：Iron 1.3%, silicon 1.2%, magnesium 0.7%th, nickel 1.6%, surplus are inevitable impurity and aluminium；
（4）After carrying out degassing and purifying to molten liquid, the nano silicon nitride zinc equivalent to molten liquid weight 2.4% is added in a manner of fluidised form Powder, with permanent magnetism blender by clockwise stirring 30 minutes, after the completion of temperature adjustment to 670 DEG C keep 20 minutes, then by mixed liquor Inject in mould, Light Aluminum Alloy casting is made in cooling.
Wherein, the trade mark of the metallic silicon is Si-2202；The ferritic trade mark is 409 types.
Wherein, the step（2）After the completion of skim to molten liquid surface, and to molten liquid bottom take out precipitation it is miscellaneous Matter；The step（4）Whipping process and insulating process slumpability gas shield；The step（4）In the type of cooling To cool down water cooling, the temperature of the cooling water is 38 DEG C.
Embodiment 2
A kind of method of smelting for improving Light Aluminum Alloy intensity, it is characterised in that comprise the following steps：
（1）By weight, prepare 1 part of 74 parts of technical pure aluminium ingot, the ferrite of raw material aluminum content >=99.7%, silicone content >= 99.3% 0.8 part of metallic silicon, 0.2 part of commercial magnesium, the commercial nickel 1.3 of nickel content >=99.2% that content of magnesium is 99.85-99.95% Part, preheated 40 minutes using temperature for 360 DEG C in vacuum drying device, after the completion of in temperature be 300 DEG C of atmosphere of inert gases Inside save backup；
（2）Above-mentioned spare mixture is sent into smelting furnace, 870 DEG C is heated up to, is kept for 35 minutes, obtain molten liquid；
（3）Detection is sampled to molten liquid, adjustment molten liquid includes following percentage by weight：Iron 1.4%, silicon 1.1%, magnesium 0.6%th, nickel 1.7%, surplus are inevitable impurity and aluminium；
（4）After carrying out degassing and purifying to molten liquid, the nano silicon nitride zinc equivalent to molten liquid weight 2.2% is added in a manner of fluidised form Powder, with permanent magnetism blender by clockwise stirring 20 minutes, after the completion of temperature adjustment to 680 DEG C keep 25 minutes, then by mixed liquor Inject in mould, Light Aluminum Alloy casting is made in cooling.
Wherein, the trade mark of the metallic silicon is Si-2503；The ferritic trade mark is 410L types；The step（4）In The type of cooling be cooling water cooling, the temperature of the cooling water is 35 DEG C.
Embodiment 3
A kind of method of smelting for improving Light Aluminum Alloy intensity, it is characterised in that comprise the following steps：
（1）By weight, prepare 0.6 part of 80 parts of technical pure aluminium ingot, the ferrite of raw material aluminum content >=99.7%, silicone content >= 99.3% 1.2 parts of metallic silicon, 0.6 part of commercial magnesium, the commercial nickel 1.5 of nickel content >=99.2% that content of magnesium is 99.85-99.95% Part, preheated 30 minutes using temperature for 460 DEG C in vacuum drying device, after the completion of in temperature be 340 DEG C of atmosphere of inert gases Inside save backup；
（2）Above-mentioned spare mixture is sent into smelting furnace, 940 DEG C is heated up to, is kept for 25 minutes, obtain molten liquid；
（3）Detection is sampled to molten liquid, adjustment molten liquid includes following percentage by weight：Iron 1.2%, silicon 1.3%, magnesium 0.8%th, nickel 1.7%, surplus are inevitable impurity and aluminium；
（4）After carrying out degassing and purifying to molten liquid, the nano silicon nitride zinc equivalent to molten liquid weight 2.6% is added in a manner of fluidised form Powder, with permanent magnetism blender by clockwise stirring 40 minutes, after the completion of temperature adjustment to 650 DEG C keep 15 minutes, then by mixed liquor Inject in mould, Light Aluminum Alloy casting is made in cooling.
Wherein, the trade mark of the metallic silicon is Si-3303；The ferritic trade mark is 409 types；The step（4）In The type of cooling be cooling water cooling, the temperature of the cooling water is 40 DEG C.
Control group 1 is set, the commercial magnesium that content of magnesium in embodiment 1 is 99.85-99.95% is removed, remaining content is constant； Control group 2 is set, the metallic silicon of silicone content >=99.3% in embodiment 1 is removed, remaining content is constant；Control group 3 is set, will Step（1）Middle preheating step removes, remaining content is constant；Control group 4 is set, by step in embodiment 1（4）Middle addition nanometer nitrogen Change zinc powder to remove, remaining content is constant；
After testing, alumina content in gained aluminum alloy materials is detected, impurity content summation is to close no more than 0.3% Lattice, detect the hardness of aluminium alloy castings, obtain following result：
Table 1
Group Alumina content（%） Whether total impurities are qualified Hardness（HB）
Embodiment 1 0.037 It is 113
Embodiment 2 0.028 It is 112
Embodiment 3 0.034 It is 113
Control group 1 0.038 It is 91
Control group 2 0.042 It is 94
Control group 3 0.053 It is no 95
Control group 4 0.047 It is no 92
Hardness in the present invention is can be seen that by data in table 1 and reaches higher standard, and the content of wherein alumina impurities is less than 0.04%, content of impurities is less than 0.3%, and product quality is obviously improved, and the scope of application is effectively increased.

Claims (6)

1. a kind of method of smelting for improving Light Aluminum Alloy intensity, it is characterised in that comprise the following steps：
（1）By weight, 0.6-1 parts of 74-80 parts of technical pure aluminium ingot, ferrite, the silicon for preparing raw material aluminum content >=99.7% contain 0.8-1.2 part of metallic silicon, the content of magnesium of amount >=99.3% are 0.2-0.6 parts of the commercial magnesium of 99.85-99.95%, nickel content >= 1.3-1.5 parts of 99.2% commercial nickel, is preheated 30-40 minutes in vacuum drying device using temperature as 360-460 DEG C, after the completion of Saved backup in the atmosphere of inert gases that temperature is 300-340 DEG C；
（2）Above-mentioned spare mixture is sent into smelting furnace, 870-940 DEG C is heated up to, is kept for 25-35 minutes, obtain molten liquid；
（3）Detection is sampled to molten liquid, adjustment molten liquid includes following percentage by weight：Iron 1.2-1.4%, silicon 1.1- 1.3%th, magnesium 0.6-0.8%, nickel 1.5-1.7%, surplus are inevitable impurity and aluminium；
（4）After carrying out degassing and purifying to molten liquid, the nanometer nitrogen equivalent to molten liquid weight 2.2-2.6% is added in a manner of fluidised form Change zinc powder, with permanent magnetism blender by clockwise stirring 20-40 minute, after the completion of temperature adjustment to 650-680 DEG C keep 15-25 divide Clock, then injects mixed liquor in mould, and Light Aluminum Alloy casting is made in cooling.
2. a kind of method of smelting for improving Light Aluminum Alloy intensity as claimed in claim 1, it is characterised in that the metallic silicon The trade mark is any one in Si-2202, Si-2503, Si-3303 or Si-331.
3. a kind of method of smelting for improving Light Aluminum Alloy intensity as claimed in claim 1, it is characterised in that described ferritic The trade mark is 409 types or 410L types.
A kind of 4. method of smelting for improving Light Aluminum Alloy intensity as claimed in claim 1, it is characterised in that the step（2） After the completion of skim to molten liquid surface, and to molten liquid bottom take out precipitation impurity.
A kind of 5. method of smelting for improving Light Aluminum Alloy intensity as claimed in claim 1, it is characterised in that the step（4） Whipping process and insulating process slumpability gas shield.
A kind of 6. method of smelting for improving Light Aluminum Alloy intensity as claimed in claim 1, it is characterised in that the step（4） In the type of cooling be cooling water cooling, the temperature of the cooling water is 35-40 DEG C.
CN201711365038.9A 2017-12-18 2017-12-18 A kind of method of smelting for improving Light Aluminum Alloy intensity Pending CN108034853A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107022698A (en) * 2016-02-02 2017-08-08 中兴通讯股份有限公司 A kind of high heat conduction pack alloy and preparation method thereof
KR101984707B1 (en) * 2018-09-21 2019-05-31 주식회사 에스제이테크 Aluminum alloy for high strength die casting excellent in corrosion resistance and thermal conductivity and manufacturing method of aluminum alloy casting using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107022698A (en) * 2016-02-02 2017-08-08 中兴通讯股份有限公司 A kind of high heat conduction pack alloy and preparation method thereof
KR101984707B1 (en) * 2018-09-21 2019-05-31 주식회사 에스제이테크 Aluminum alloy for high strength die casting excellent in corrosion resistance and thermal conductivity and manufacturing method of aluminum alloy casting using the same

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Application publication date: 20180515

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