CN102788719A - Method for manufacturing compressed aluminum alloy housing sample - Google Patents
Method for manufacturing compressed aluminum alloy housing sample Download PDFInfo
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- CN102788719A CN102788719A CN2011101302838A CN201110130283A CN102788719A CN 102788719 A CN102788719 A CN 102788719A CN 2011101302838 A CN2011101302838 A CN 2011101302838A CN 201110130283 A CN201110130283 A CN 201110130283A CN 102788719 A CN102788719 A CN 102788719A
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Abstract
The invention relates to a method for manufacturing a compressed aluminum alloy housing sample. The method comprises the following steps of 1, process designing, 2, mold manufacture, 3, mold core manufacture, 4, melting refining, 5, mold assembling and pouring, 6, shakeout cleaning, 7, X-ray flaw detection, 8, heat treatment, 9, mechanical processing and 10, a bursting test. AlSi7Mg0.3, and an aluminum-strontium alloy or/and an aluminum-titanium alloy as refiners are adopted in the melting refining (4). A body performance test (11), oxidizing slag content analysis (12), body microstructure compactness analysis (13), body microstructure pinhole degree analysis (14), a revision process design (15) and an alloy composition determination and refining process (16) are carried out after the bursting test (10). Through the above processes, the compressed aluminum alloy housing sample is obtained. The method has a reasonable process flow and realizes a larger pressure-bearing capacity of a compressed aluminum alloy housing product.
Description
Technical field
The present invention relates to a kind of cast method for making of pressurized Al-alloy casing of aluminium alloy sand mold gravitational casting, particularly a kind of method of making pressurized Al-alloy casing sample.The product that the present invention relates to is mainly used in high pressure, the electric system of UHV (ultra-high voltage) transmission & distribution, belongs to new forms of energy, fields such as electronic apparatus equipment safety.
Background technology
Mostly the at present domestic blank that is used for the used Al-alloy casing product of high pressure, the electric system of UHV (ultra-high voltage) transmission & distribution is cast member; Al-alloy casing casting classic method is to adopt the sand mold low-pressure casting process to accomplish; This casting technique is long owing to the low-pressure casting time; Exist the defective that production efficiency is low, this soma of foundry goods crystal grain is thick; Though the product of producing through the sand mold low-pressure casting process during in explosion bulge test minimum pressure can reach 0.4～0.5MPa; The strong or weak relation of Al-alloy casing product compression capability reached criterion of acceptability, owing to the safety of the whole operation of power networks of high-voltage and ultra-high transmission & distribution electric system, therefore must improve its security to guarantee whole electric power netting safe running through improving Al-alloy casing product compression capability; Improve the compression capability of Al-alloy casing product, very difficult with sand mold low-pressure casting process method.In order to remedy above-mentioned defective; According to data check; Have at present minority unit studying abroad and use the sand mold gravity foundry technology to substitute traditional low-pressure casting process, the Al-alloy casing product compression capability that this method is produced has by a relatively large margin than the compression capability of sand mold low pressure process method and improves.My company is devoted to improve with the sand mold gravity foundry technology research that is stressed of pressurized Al-alloy casing always, has accumulated abundant theory and practice experience.
Pressurized Al-alloy casing product is before a small amount of or batch making; Must confirm the technology that the actual production of pressurized Al-alloy casing is made through making pressurized Al-alloy casing sample; Existing method of making pressurized Al-alloy casing sample includes technological design, makes mould, molding and core making, fusing refining, mould assembling cast, peeling, x-ray detection, thermal treatment, machine work and explosion bulge test step, through accomplishing the making of pressurized Al-alloy casing sample after the above-mentioned steps.After pressurized Al-alloy casing sample production is accomplished; The actual fabrication technology of pressurized Al-alloy casing product is just decided by the method for making of sample; The actual fabrication technology of pressurized Al-alloy casing product include before the explosion bulge test step in steps with the requirement of correlation step, promptly do not comprise the explosion bulge test step in the production technology of pressurized Al-alloy casing product.
Summary of the invention
The objective of the invention is the deficiency to prior art, provide a kind of pressurized Al-alloy casing product that can make to receive that pressure pressure is bigger, pressurized is stable and security is higher, production efficiency is high, pressurized Al-alloy casing sample receives the method that the examination project is complete, technology is reasonably made pressurized Al-alloy casing sample.
The technical scheme that realizes above-mentioned purpose is: a kind of method of making pressurized Al-alloy casing sample; Said method includes technological design, makes mould, molding and core making, fusing refining, mould assembling cast, peeling, x-ray detection, thermal treatment, machine work and explosion bulge test step; The material that the fusing refining is adopted is AlSi7Mg0.3 and fining agent; Fining agent is that al-sr alloy is or/and aluminum titanium alloy; After the explosion bulge test step, also be provided with the step of bulk properties test, oxidizing slag content analysis, the property analysis of body dense structure, the analysis of body harpoon cell size, revision technological design and definite alloy composition and refinery practice, through accomplishing the making of pressurized Al-alloy casing sample after the above-mentioned steps.
Further, described bulk properties test is that tensile strength, yield strength and test of elongation rate are carried out in sampling on pressurized Al-alloy casing product.
Further, described oxidizing slag content analysis is that pressurized Al-alloy casing product is carried out x-ray detection.
Further, the property analysis of described body dense structure is through the metallographic examination method pressurized Al-alloy casing to be carried out the property analysis of body dense structure.
Further, the analysis of described body harpoon cell size is through the metallographic examination method pressurized Al-alloy casing to be carried out the analysis of body harpoon cell size.
Further, described revision technological design is the project that does not reach criterion of acceptability in explosion bulge test, bulk properties test, oxidizing slag content analysis, the property analysis of body dense structure and the analysis of body harpoon cell size to be carried out technologic revision make it reach criterion of acceptability.
Further; Described definite alloy composition and refinery practice are to regulate content of magnesium; Regulate strontium or/and Ti content, magnesium, strontium, titanium three's criterion of acceptability is respectively that content of magnesium is 0.25～0.30%, and content of strontium is 0.01～0.02%; Ti content is 0.08～0.15%, and according to content of magnesium and strontium or/and Ti content adjustment refining time.
Further, the criterion of acceptability of described tensile strength, yield strength and test of elongation rate is tensile strength＞165MPa, yield strength＞135MPa and length growth rate＞1.2%.
Adopt the benefit of technique scheme to be: because the pressurized Al-alloy casing sample of the inventive method receives the examination project very fully; Technology is rationally convenient; Therefore make that the production technology of definite pressurized Al-alloy casing product is very reasonable in view of the above; The pressurized Al-alloy casing product of producing receives pressure pressure bigger, and pressurized stability and security are higher, thereby the security of the transmission and distribution network operation of using pressurized Al-alloy casing product is improved greatly.The aluminium alloy sand mold gravity foundry technology of the pressurized Al-alloy casing product that the present invention confirms is compared with traditional low-pressure casting process; Production efficiency can improve 4～5 times; Cast properties improves 1.5～2 times, and production efficiency of the present invention is high, and particularly the compression capability of pressurized Al-alloy casing product increases greatly; Receive pressure pressure bigger, improved the stable and security of pressurized of pressurized Al-alloy casing product greatly.
Description of drawings
Fig. 1 is a technological process block-diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Embodiment
As shown in Figure 1; A kind of method of making pressurized Al-alloy casing sample, said method include technological design 1, making mould 2, molding and core making 3, fusing refining 4, mould assembling cast 5, peeling 6, x-ray detection 7, thermal treatment 8, machine work 9 and explosion bulge test 10 steps.After explosion bulge test 10 steps, also be provided with the step of bulk properties test 11, oxidizing slag content analysis 12, body dense structure property analysis 13, body harpoon cell size analysis 14, revision technological design 15 and definite alloy composition and refinery practice 16.At first carry out technological design 1,, select die joint, calculate mo(u)ld top half and mo(u)ld bottom half height according to structure, weight and the wall thickness requirement of pressurized Al-alloy casing product; The size and dimension at each position uses filtering technique in the design running gate system, confirms Quench and feeding amount, produces pressurized Al-alloy casing artwork; Make mould 2 according to artwork then; Then carry out molding and core making 3, adopt phenolic sand molding; The aluminium liquid that will melt refining 4 behind the molding and core making 3 carries out mould assembling cast 5; Carry out peeling 6 then, the cleaning foundry goods; Carry out x-ray detection 7 after the peeling 6; After finishing, x-ray detection 7 heat-treats 8; Carry out machine work 9 after the thermal treatment 8; After accomplishing, machine work 9 carries out explosion bulge test 10.After explosion bulge test 10 steps, carry out bulk properties test 11; After accomplishing, bulk properties test 11 carries out oxidizing slag content analysis 12 again; Then carry out body dense structure property analysis 13 and analyze 14 with body harpoon cell size; Above-mentioned steps is revised technological design 15 after accomplishing, and confirms alloy composition and refinery practice 16 after the technological design revision is accomplished, through accomplishing the making of pressurized Al-alloy casing sample after the above-mentioned steps.In above-mentioned each step, wherein:
The material that described fusing refining 4 is adopted is AlSi7Mg0.3 and fining agent, and fining agent is that al-sr alloy is or/and aluminum titanium alloy (be that fining agent is al-sr alloy or aluminum titanium alloy, fining agent also can adopt al-sr alloy and aluminum titanium alloy); Content of strontium is 0.01～0.02% in the fining agent; Ti content is 0.08～0.15%, and fusing refining 4 temperature are 720～730 ℃, and fusing 4 times of refining are 10～25min; Adopt the density of density equivalent instrument test aluminium liquid, density equivalent value＜1.5 of aluminium liquid.Fusing refining 4 requires to control well temperature, and temperature is low excessively, and aluminium liquid is mobile poor, can produce too much oxidizing slag, and temperature is too high, also can produce too much oxidizing slag.
It is 680～720 ℃ that 5 temperature are poured into a mould in described mould assembling, controls pouring temperature well.
Described x-ray detection 7 detects casting flaw; The pore criterion of acceptability is＜the middle level Four of stipulating of State Standard of the People's Republic of China GB/T9438-1999 " aluminium alloy castings " that the oxidizing slag criterion of acceptability is＜the middle level Four of stipulating of State Standard of the People's Republic of China GB/T9438-1999 " aluminium alloy castings ".
Described thermal treatment 8 is solution treatment and Ageing Treatment, and the holding temperature during solution treatment is 530 ± 5 ℃, and temperature retention time is 8～12h, and the holding temperature during Ageing Treatment is 165 ± 5 ℃, and temperature retention time is 6～7h.
Described machine work 9 criterion of acceptability are to reach technological design 1 requirement.
The criterion of acceptability of described explosion bulge test 10 is that minimum pressure reaches 0.6MPa.
Described bulk properties test 11 is that tensile strength, yield strength and test of elongation rate are carried out in sampling on pressurized Al-alloy casing product.The criterion of acceptability of test is tensile strength＞165MPa, yield strength＞135MPa and length growth rate＞1.2%.
Described oxidizing slag content analysis 12 is pressurized Al-alloy casing product to be carried out x-ray detection detect.The oxidizing slag criterion of acceptability is three grades that stipulate among rank＜State Standard of the People's Republic of China GB/T9438-1999 " aluminium alloy castings ".
Described body dense structure property analysis 13 is through the metallographic examination method pressurized Al-alloy casing to be carried out the property analysis of body dense structure.The criterion of acceptability of body dense structure property analysis is that the Pyatyi to crystal grain is stipulated among rank＞State Standard of the People's Republic of China GB/T7946.4-1999 " Al-Cu casting alloy grain size collection of illustrative plates ".
Described body harpoon cell size analysis 14 is through the metallographic examination method pressurized Al-alloy casing to be carried out the analysis of body harpoon cell size.The criterion of acceptability of body harpoon cell size analysis is that the secondary to pinhole rate is stipulated among rank≤State Standard of the People's Republic of China GB/T7946.4-1999 " Al-Cu casting alloy grain size collection of illustrative plates ".
Described revision technological design 15 is the project that does not reach criterion of acceptability in explosion bulge test 10, bulk properties test 11, oxidizing slag content analysis 12, body dense structure property analysis 13 and the body harpoon cell size analysis 14 to be carried out technologic revision make it reach criterion of acceptability.
Described definite alloy composition and refinery practice 16 are to regulate content of magnesium, and (if the fining agent that in fusing refining 4, adopts is an al-sr alloy, what need in this step to regulate is the content of strontium to regulate strontium or/and Ti content; If the fining agent that in fusing refining 4, adopts is the aluminum titanium alloy gold, what need adjusting in this step is the content of titanium; If the fining agent that in fusing refining 4, adopts is al-sr alloy and aluminum titanium alloy, what need adjusting in this step is the content of strontium and titanium).Magnesium, strontium, titanium three's criterion of acceptability is respectively that content of magnesium is 0.25～0.30%, and content of strontium is 0.01～0.02%, and Ti content is 0.08～0.15%, according to content of magnesium and strontium or/and Ti content adjustment refining time.
The invention is not restricted to the foregoing description, all employings are equal to technical scheme that replacement or equivalence replacement form and all belong to the present invention and require the scope protected.
What the inventive method was made the employing of pressurized Al-alloy casing sample is aluminium alloy sand mold gravity foundry technology.After the inventive method is made the completion of pressurized Al-alloy casing sample; The actual fabrication technology of pressurized Al-alloy casing product is just decided by the method for making of sample; The actual fabrication technology of pressurized Al-alloy casing product include before the explosion bulge test step in steps with the requirement of correlation step; Be not comprise the explosion bulge test step in the actual fabrication technology of pressurized Al-alloy casing product, machine work finishes, and carries out the hydraulic pressure test and the air tightness test of 2 times of design pressures again; Product test is qualified, and referable is used.
Claims (8)
1. method of making pressurized Al-alloy casing sample; Said method includes technological design (1), making mould (2), molding and core making (3), fusing refining (4), mould assembling cast (5), peeling (6), x-ray detection (7), thermal treatment (8), machine work (9) and explosion bulge test (10) step; The material that fusing refining (4) is adopted is AlSi7Mg0.3 and fining agent; Fining agent is that al-sr alloy is or/and aluminum titanium alloy; It is characterized in that: after explosion bulge test (10) step, also be provided with the step of bulk properties test (11), oxidizing slag content analysis (12), body dense structure property analysis (13), body harpoon cell size analysis (14), revision technological design (15) and definite alloy composition and refinery practice (16), through accomplishing the making of pressurized Al-alloy casing sample after the above-mentioned steps.
2. according to the method for the said making pressurized of claim 1 Al-alloy casing sample, it is characterized in that: described bulk properties test (11) is that tensile strength, yield strength and test of elongation rate are carried out in sampling on pressurized Al-alloy casing product.
3. according to the method for the said making pressurized of claim 1 Al-alloy casing sample, it is characterized in that: described oxidizing slag content analysis (12) is that pressurized Al-alloy casing product is carried out x-ray detection.
4. according to the method for the said making pressurized of claim 1 Al-alloy casing sample, it is characterized in that: described body dense structure's property analysis (13) is through the metallographic examination method pressurized Al-alloy casing to be carried out the property analysis of body dense structure.
5. according to the method for the said making pressurized of claim 1 Al-alloy casing sample, it is characterized in that: it is through the metallographic examination method pressurized Al-alloy casing to be carried out the analysis of body harpoon cell size that described body harpoon cell size is analyzed (14).
6. according to the method for the said making pressurized of claim 1 Al-alloy casing sample, it is characterized in that: described revision technological design (15) is the project that does not reach criterion of acceptability in explosion bulge test (10), bulk properties test (11), oxidizing slag content analysis (12), body dense structure property analysis (13) and the body harpoon cell size analysis (14) to be carried out technologic revision make it reach criterion of acceptability.
7. according to the method for the said making pressurized of claim 1 Al-alloy casing sample; It is characterized in that: described definite alloy composition and refinery practice (16) are to regulate content of magnesium; Regulate strontium or/and Ti content, magnesium, strontium, titanium three's criterion of acceptability is respectively that content of magnesium is 0.25～0.30%, and content of strontium is 0.01～0.02%; Ti content is 0.08～0.15%, and according to content of magnesium and strontium or/and Ti content adjustment refining time.
8. according to the method for the said making pressurized of claim 2 Al-alloy casing sample, it is characterized in that: the criterion of acceptability of described tensile strength, yield strength and test of elongation rate is tensile strength＞165MPa, yield strength＞135MPa and length growth rate＞1.2%.
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| CN2011101302838A CN102788719A (en) | 2011-05-19 | 2011-05-19 | Method for manufacturing compressed aluminum alloy housing sample |
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| CN2011101302838A CN102788719A (en) | 2011-05-19 | 2011-05-19 | Method for manufacturing compressed aluminum alloy housing sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439977A (en) * | 2014-12-03 | 2015-03-25 | 北京航星机器制造有限公司 | Rapid manufacturing method of symmetric apron board type casting aluminum alloy parts |
Citations (2)
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| JPH0688152A (en) * | 1992-09-07 | 1994-03-29 | Hitachi Metals Ltd | Method for deciding improvement treatment of molten aluminum alloy |
| US5595615A (en) * | 1993-08-26 | 1997-01-21 | Hitachi Metals, Ltd. | High toughness and high strength aluminum alloy casting |
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2011
- 2011-05-19 CN CN2011101302838A patent/CN102788719A/en active Pending
Patent Citations (2)
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|---|---|---|---|---|
| JPH0688152A (en) * | 1992-09-07 | 1994-03-29 | Hitachi Metals Ltd | Method for deciding improvement treatment of molten aluminum alloy |
| US5595615A (en) * | 1993-08-26 | 1997-01-21 | Hitachi Metals, Ltd. | High toughness and high strength aluminum alloy casting |
Non-Patent Citations (6)
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|---|
| 张猛等: "高压开关设备中铝合金铸造工艺发展综述", 《高压电器》, vol. 47, no. 4, 30 April 2011 (2011-04-30), pages 75 - 83 * |
| 李双寿等: "亚共晶铝硅合金锶变质处理的孕育和衰退", 《铸造》, vol. 54, no. 4, 30 April 2005 (2005-04-30), pages 344 - 347 * |
| 李德成等: "GB/7 9438-1999 铝合金铸件", 《中华人民共和国国家标准》, 3 September 1999 (1999-09-03), pages 1 - 2 * |
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| 陈曦等: "全封闭组合电器铝合金铸造壳体的材质选用", 《电网技术》, vol. 31, no. 2, 31 December 2007 (2007-12-31), pages 72 - 74 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439977A (en) * | 2014-12-03 | 2015-03-25 | 北京航星机器制造有限公司 | Rapid manufacturing method of symmetric apron board type casting aluminum alloy parts |
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Application publication date: 20121121 |