CN102383007A - Method for preparing high-strength aluminum alloy added with Al+Cu+Er+Sb thinned and modified semi-solid composite blank - Google Patents
Method for preparing high-strength aluminum alloy added with Al+Cu+Er+Sb thinned and modified semi-solid composite blank Download PDFInfo
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- CN102383007A CN102383007A CN2011103427359A CN201110342735A CN102383007A CN 102383007 A CN102383007 A CN 102383007A CN 2011103427359 A CN2011103427359 A CN 2011103427359A CN 201110342735 A CN201110342735 A CN 201110342735A CN 102383007 A CN102383007 A CN 102383007A
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Abstract
The invention relates to a method for preparing a high-strength aluminum alloy added with an Al+Cu+Er+Sb thinned and modified semi-solid composite blank. The method comprises the following steps of: A, preparing the Al+Cu+Er+Sb thinned and modified semi-solid composite blank; and B, preparing the high-strength aluminum alloy. The alloy material has high strength and high toughness; the mechanical property of the alloy can reach QT450-10 material standard of cast iron by detection, the tensile strength of an international metallic single cast test bar reaches over 430MPa, the elongation of the alloy is over 9 percent, and the hardness mean HB of the alloy is more than or equal to 125; the alloy elements in the alloy are acquired without using intermediate alloy materials; compared with the conventional aluminum alloy manufacturing method, because the smelting link of intermediate alloy is canceled, the method has the advantages of reducing pollution, reducing energy consumption and burning loss and reducing the total production cost by over 20 percent; and the alloy can replace nodular cast iron and is used for parts such as a bracket and the like in an automobile, so that the bottleneck of full aluminum of the automobile is broken.
Description
Technical field
The invention belongs to the non-ferrous metal alloy technical field of material, relate to cast aluminium alloy, especially a kind of preparation method who adds the rotten semi-solid state composite blank aldural of Al+Cu+Er+Sb refinement.
Technical background
Duraluminum is compared advantage such as have the specific tenacity height, specific rigidity is high, thermal conductivity is good, solidity to corrosion is good with iron and steel; Compare with titanium alloy, magnesiumalloy and to have the advantage that resource reserve is big, cost is low, use characteristics is good; Therefore duraluminum is ideal lightweight materials in space flight and aviation industry, bullet train, automotive industry and a large amount of promotion and application of other industrial circles.
Data statistics is arranged; By 2010; Though the duraluminum consumption in each automobile has reached 150Kg/ but application direction mainly is a housing class foundry goods, use kind and be mostly eutectic or hypoeutectic al-si alloy, and the support class part in the automobile still mostly be spheroidal graphite cast iron QT400-18, QT400-15, QT450-10, QT500-7; Its mechanical property is example with QT450-10; Be tensile strength intensity >=450Mpa, elongation after fracture >=10% is obviously not enough aspect high temperature resistant, corrosion-resistant, high-strength, high-ductility and high ductibility.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art; The preparation method of the rotten semi-solid state composite blank aldural of a kind of Al+Cu+Er+Sb of adding refinement is provided, and that prepared duraluminum has is high temperature resistant, corrosion-resistant, high-strength, the characteristic of high-ductility and high ductibility.
The objective of the invention is to realize like this:
A kind of preparation method who adds the rotten semi-solid state composite blank aldural of Al+Cu+Er+Sb refinement comprises the preparation of the rotten semi-solid state composite blank of refinement and the preparation of aldural, and concrete steps are:
The preparation method of A, the rotten semi-solid state composite blank of Al+Cu+Er+Sb refinement:
(1) will cross 200～300 order metal erbium powder, copper rice and broken good, Antimony Metal 99.65& 99.96 stirs, place the sand mold mould;
(2) getting temperature 800-850 ℃ fine aluminium liquid pours in the above-mentioned mould; Stir immediately to form semi-solid blank; When reducing to 200～300 ℃, the temperature of treating above-mentioned semi-solid blank takes out; Be squeezed into the thin slice of 0.1～0.5mm, promptly obtain the rotten semi-solid state composite blank thin slice of Al+Cu+Er+Sb refinement, subsequent use;
The preparation method of B, aldural:
(1) content of getting impurity iron, silicon all less than 0.15% and other impurity summation be put in the preheating oven less than 0.05% remelted aluminum ingot; Preheating is two hours in 200～300 ℃ preheating oven; In regenerative furnace, heat then, treat to carry out when temperature rises to 700～750 ℃ the refining slag hitting;
(2) ratio according to composite blank thin slice and remelted aluminum ingot weight ratio 0.8～1.2: 10 adds the blank thin slice, and fully stirs, and melt is incubated 1～2 hour under 700～750 ℃ of temperature;
(3) carry out secondary slag hitting degasification refining, after the refining scum silica frost is handled totally, and left standstill 10～15min;
(4) cast at 700～720 ℃, and the detection of materialsing;
(5) detect qualified back finished product packing warehouse-in.
And among the preparation method of the rotten semi-solid state composite blank of said Al+Cu+Er+Sb refinement, metal erbium powder: copper rice: Antimony Metal 99.65& 99.96: the part by weight of fine aluminium liquid is 1～5: 1～5: 0.2～1: 30～50.
And the said copper metric system becomes the shape of diameter 0.6mm, long 3mm.
The beneficial effect that the present invention obtains is following:
1, this alloy material has high-strength and high ductility: reach nodular cast iron QT450-10 standard of materials through detecting mechanical property, the tensile strength of GB metal mold separately cast test bar reaches more than the 430Mpa, and unit elongation is more than 9%, hardness MV HB >=125.
2, this alloy is under the T5 state, and the tensile strength peak of GB metal mold separately cast test bar can reach 470Mpa, and minimum value is 438Mpa, and the minimum value of sample tensile strength is peaked 93%; Unit elongation peak 16.3%, minimum value are 13.5%, the peak HB=133 of hardness, minimum value HB=126; Find out the stable performance of this alloy product thus.
3, this alloy is not very high to material requirements, need not increase material cost.
4, the master alloy material is not used in the acquisition of the alloying element in this alloy; Compare the melting link of having removed master alloy with conventional aluminum alloy method of manufacture; Reduced pollution when cutting down the consumption of energy with scaling loss; Total cost of production has reduced more than 20%, and alternative spheroidal graphite cast iron is used for the support class part of automobile, breaks through the bottleneck of the full calorize of automobile.
5, the modifying-refining matrix material of this alloy is made by semi-solid blank extruding, so the refinement modification effect of alloying element and wettability is all very good, alloy property has breakthrough raising.
Embodiment
Through specific embodiment the present invention is made further detailed description below, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Embodiment 1:
A kind of preparation method who adds the rotten semi-solid state composite blank aldural of Al+Cu+Er+Sb refinement, step is:
(1) the erbium powder is rejected larger particles with 200 mesh screenings, the erbium powder that sieves placed in 287 ℃ of stoving ovens the preheating oven dry 1.5 hours, took out erbium powder after the oven dry and was put in the ventilation to naturally cool to room temperature subsequent use;
(2) with crusher that the fragment that Antimony Metal 99.65& 99.96 is broken into diameter 1～3mm is subsequent use;
(3) with 35 kilograms of subsequent use erbium powder, 35 kilograms of copper rice, 8 kilograms of good Antimony Metal 99.65& 99.9ies of fragmentation are put in the preheating oven jointly, and drying and forewarm is 2 hours under 250 ℃ furnace temperature;
(4) erbium powder, copper rice and Antimony Metal 99.65& 99.96 that preheating is good stirs and places the sand mold mould;
(5) get 825 ℃ fine aluminium liquid 400Kg and pour in the above-mentioned mould and stir immediately, form semi-solid blank, take out when the temperature of treating above-mentioned semi-solid blank is reduced to 200～300 ℃, the blank thin slice that is squeezed into 0.3mm can be subsequent use;
(6) content of getting impurity iron, silicon is all less than 0.15%; Other impurity summation is put in the preheating oven less than 0.05% remelted aluminum ingot; Preheating is two hours in 200-300 ℃ preheating oven, in regenerative furnace, heats then, treats to carry out when temperature rises to 730 ℃ the refining slag hitting;
(7) take by weighing blank thin slice 20Kg, remelted aluminum ingot weight 205Kg goes into the stove heat fused, when furnace charge all after the fusing, fully stir,
Stop heating when (8) continuing to be warming up to 740 ℃, melt is incubated 2 hours under 700～740 ℃ of temperature;
(9) (4 ± 0.2m3/h) send into refining agent (HGJ-2 does not have the sodium slag-cleaning agent) and carry out secondary degasification refining slag hitting in the melt to adopt argon gas stream with the automatic powder spraying machine;
(10)) leave standstill 15min;
(11) cast at 725 ℃, and the detection of materialsing;
Through check, the Mechanical Properties of Aluminum Alloys tensile strength of this experimental technique preparation is 440Mpa, and unit elongation is 14.4%, hardness MV HB=127.
Embodiment 2:
A kind of preparation method who adds the rotten semi-solid state composite blank aldural of Al+Cu+Er+Sb refinement, step is:
(1) the erbium powder is rejected larger particles with 300 mesh screenings, the erbium powder that sieves placed in 287 ℃ of stoving ovens the preheating oven dry 1.5 hours, took out erbium powder after the oven dry and was put in the ventilation to naturally cool to room temperature subsequent use;
(2) with crusher that the fragment that Antimony Metal 99.65& 99.96 is broken into diameter 1～3mm is subsequent use;
(3) 40 kilograms of subsequent use erbium powder, 40 kilograms of copper rice, 9 kilograms of good Antimony Metal 99.65& 99.9ies of fragmentation are put in the preheating oven jointly, drying and forewarm is 3 hours under 300 ℃ furnace temperature;
(4) erbium powder, copper rice and Antimony Metal 99.65& 99.96 that preheating is good stirs and places the sand mold mould;
(5) get 850 ℃ fine aluminium liquid 400Kg and pour in the above-mentioned mould and stir immediately, form semi-solid blank, take out when the temperature of treating above-mentioned semi-solid blank is reduced to 200～300 ℃, the blank thin slice that is squeezed into 0.2mm gets final product, and is subsequent use;
(6) content of getting impurity iron, silicon is all less than 0.15%; Other impurity summation is put in the preheating oven less than 0.05% remelted aluminum ingot; Preheating is two hours in 200～300 ℃ preheating oven, in regenerative furnace, heats then, treats to carry out when temperature rises to 725 ℃ the refining slag hitting;
(7) take by weighing blank thin slice 30Kg, remelted aluminum ingot weight ratio 310Kg goes into the stove heat fused, after the furnace charge off-bottom, fully stir;
Stop heating when (8) continuing to be warming up to 740 ℃, melt is incubated 1.5 hours under 700-730 ℃ of temperature;
(9) (4 ± 0.2m3/h) send into refining agent (HGJ-2 does not have the sodium slag-cleaning agent) and carry out secondary slag hitting degasification refining in the melt, after the refining scum silica frost are handled clean to adopt argon gas stream with the automatic powder spraying machine;
(10) leave standstill 10min;
(11) cast at 715 ℃, and the detection of materialsing;
(12) detect qualified back finished product packing warehouse-in.
Through check, the Mechanical Properties of Aluminum Alloys tensile strength of this experimental technique preparation is 465Mpa, and unit elongation is 15.8%, hardness MV HB=132.
Be example with ZL 101 alloy ingot that adds common aluminium base master alloy and the high tough aluminum alloy ingot that adds the rotten semi-solid state composite blank of Al+Cu+Er+Sb refinement below, contrast prior art each item performance index:
Find out by last table: the aluminum alloy ingot that adds the rotten semi-solid state composite blank of Al+Cu+Er+Sb refinement
1, technology controlling and process is simple, product stable very good
2, tensile strength has improved 100-150%, and elongation after fracture improves greatly.
3, energy consumption has reduced 10-20%
4, production efficiency has improved 20%
5, scaling loss reduces
The main chemical compositions of the made cast aluminium alloy of the present invention sees the following form:
Tensile strength >=430Mpa under the mechanical property T5 state, elongation after fracture >=9%, hardness HBS >=130.
Approaching with it y alloy y has following two trades mark:
Claims (3)
1. preparation method who adds the rotten semi-solid state composite blank aldural of Al+Cu+Er+Sb refinement, it is characterized in that: comprise the preparation of the rotten semi-solid state composite blank of refinement and the preparation of aldural, concrete steps are:
The preparation method of A, the rotten semi-solid state composite blank of Al+Cu+Er+Sb refinement:
(1) will cross 200～300 order metal erbium powder, copper rice and broken good, Antimony Metal 99.65& 99.96 stirs, place the sand mold mould;
(2) getting temperature 800-850 ℃ fine aluminium liquid pours in the above-mentioned mould; Stir immediately to form semi-solid blank; When reducing to 200～300 ℃, the temperature of treating above-mentioned semi-solid blank takes out; Be squeezed into the thin slice of 0.1～0.5mm, promptly obtain the rotten semi-solid state composite blank thin slice of Al+Cu+Er+Sb refinement, subsequent use;
The preparation method of B, aldural:
(1) content of getting impurity iron, silicon all less than 0.15% and other impurity summation be put in the preheating oven less than 0.05% remelted aluminum ingot; Preheating is two hours in 200～300 ℃ preheating oven; In regenerative furnace, heat then, treat to carry out when temperature rises to 700～750 ℃ the refining slag hitting;
(2) ratio according to composite blank thin slice and remelted aluminum ingot weight ratio 0.8～1.2: 10 adds the blank thin slice, and fully stirs, and melt is incubated 1～2 hour under 700～750 ℃ of temperature;
(3) carry out secondary slag hitting degasification refining, after the refining scum silica frost is handled totally, and left standstill 10～15min;
(4) cast at 700～720 ℃, and the detection of materialsing;
(5) detect qualified back finished product packing warehouse-in.
2. the preparation method of the rotten semi-solid state composite blank aldural of adding Al+Cu+Er+Sb refinement according to claim 1; It is characterized in that: among the preparation method of the rotten semi-solid state composite blank of said Al+Cu+Er+Sb refinement, metal erbium powder: copper rice: Antimony Metal 99.65& 99.96: the part by weight of fine aluminium liquid is 1～5: 1～5: 0.2～1: 30～50.
3. the preparation method of the rotten semi-solid state composite blank aldural of adding Al+Cu+Er+Sb refinement according to claim 1, it is characterized in that: the said copper metric system becomes the shape of diameter 0.6mm, long 3mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821264A (en) * | 2016-03-30 | 2016-08-03 | 南通龙硕轻合金科技有限公司 | High-ductility aluminum alloy material |
| CN107246069A (en) * | 2017-08-02 | 2017-10-13 | 谭颖 | One kind building truss structure |
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| CN101514409A (en) * | 2009-03-31 | 2009-08-26 | 南昌大学 | A method for preparing in situ MgSi particle reinforced metal matrix composite |
| CN101705398A (en) * | 2009-11-20 | 2010-05-12 | 北京工业大学 | Rare earth-containing aluminum alloy used for semisolid state rheoforming and preparation method of semisolid state slurry thereof |
| CN101967576A (en) * | 2010-11-05 | 2011-02-09 | 天津立中合金集团有限公司 | Method for preparing multi-element aluminum base composite powder substituting aluminum base intermediate alloy |
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| CN101514409A (en) * | 2009-03-31 | 2009-08-26 | 南昌大学 | A method for preparing in situ MgSi particle reinforced metal matrix composite |
| CN101705398A (en) * | 2009-11-20 | 2010-05-12 | 北京工业大学 | Rare earth-containing aluminum alloy used for semisolid state rheoforming and preparation method of semisolid state slurry thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821264A (en) * | 2016-03-30 | 2016-08-03 | 南通龙硕轻合金科技有限公司 | High-ductility aluminum alloy material |
| CN107246069A (en) * | 2017-08-02 | 2017-10-13 | 谭颖 | One kind building truss structure |
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Effective date of registration: 20200522 Address after: 300457 No. 58, Tai Tai Road, west end of Binhai New Area, Tianjin Patentee after: Tianjin xinlizhong alloy Group Co., Ltd Address before: 300457 No. 58, Tai Mo Road, West Development Zone, Tanggu District, Tianjin Patentee before: Tianjin Lizhong Alloy Group Co.,Ltd. |