CN102899537A - High-strength casting aluminum alloy for electric power fittings and manufacturing method thereof - Google Patents
High-strength casting aluminum alloy for electric power fittings and manufacturing method thereof Download PDFInfo
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- CN102899537A CN102899537A CN2012103599824A CN201210359982A CN102899537A CN 102899537 A CN102899537 A CN 102899537A CN 2012103599824 A CN2012103599824 A CN 2012103599824A CN 201210359982 A CN201210359982 A CN 201210359982A CN 102899537 A CN102899537 A CN 102899537A
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Abstract
The invention relates to a high-strength casting aluminum alloy for electric power fittings, which comprises 11-13% of silicon, 0.3-0.4% of magnesium, 0.02-0.03% of strontium, at most 0.3% of iron and the balance of aluminum. The manufacturing method comprises the following steps: completely melting pure aluminum ingots into molten aluminum, adding required amounts of silicon and magnesium into the molten aluminum, sufficiently melting, adding a proper amount of Al-Sr modifier to carry out modification, and introducing argon into the molten aluminum to carry out refinement and degassing, wherein the obtained aluminum alloy can be used for casting electric power fittings. The aluminum alloy material has favorable casting processibility; and after proper heat treatment is carried out to reinforce the cast workpiece, the tensile strength is up to higher than 330MPa, the percentage of elongation is 2-5%, and the Brinell Hardness is higher than 80. When being used for casting electric power fittings, the high-strength casting aluminum alloy can avoid generating weak spots on the parting plane, and the heat treatment technique has the advantages of low temperature, short time and low cost. The product has the advantages of light weight, favorable corrosion resistance and no electric energy loss, and is convenient for construction and installation.
Description
Technical field: the present invention relates to the high strength cast aluminum alloys that a kind of cast aluminium alloy material, particularly electric armour clamp are used.The present invention relates to a kind of manufacture method of cast aluminium alloy simultaneously.
Background technology: at present, a lot of KTH330-8 of employing such as the strain clamp in the electric armour clamp, suspension clamp black heart malleable cast iron material is made.The foundry goods of black heart malleable cast iron adopts the sand mold casting mode, can form thin spot at the joint face place, in the load of regulation, may ftracture at the joint face place.And black heart malleable cast iron adopts graphitizing annealing technique, and annealing temperature is high, and the time is long, and cost is high, and product performance and annealing quality are closely related.In addition, the power consumption of electric armour clamp is mainly caused circuit is in service by ferromagnetic material, and it comprises magnetic hysteresis loss and eddy-current loss, and energy loss is serious, and adopts nonmagnetic substance, and for example aluminum alloy materials then is difficult the electric energy loss shortcoming.Therefore, consider from the energy-conserving and environment-protective equal angles, adopting cast aluminium alloy to replace cast iron has become the development trend that electric armour clamp is made, namely discloses a kind of aluminium alloy for the manufacture of electric armour clamp such as Chinese patent application CN1514032A.
Summary of the invention: for the deficiencies in the prior art, the invention provides the electric armour clamp high strength cast aluminum alloys that a kind of intensity is high, elongation is large.The present invention provides a kind of manufacture method of cast aluminium alloy simultaneously.
Cast aluminium alloy of the present invention is grouped into by the one-tenth of following weight percent, and silicon is 11～13%, magnesium is 0.3～0.4%, strontium is 0.02～0.03%, iron is no more than 0.3%, surplus is aluminium.
Further, also contain weight percent in the cast aluminium alloy and be 0.08～0.15% titanium, can improve material property.
Aluminium alloy manufacture method of the present invention is carried out successively according to following step,
(a) in smelting furnace, add the fine aluminium ingot, temperature is increased to 750～790 ℃, the fine aluminium ingot is melted fully be aluminium liquid;
(b) drop into again silicon and the magnesium elements of institute's expense in the aluminium liquid, perhaps contain the intermediate materials of above-mentioned element, make it abundant melting;
(c) then under 720～750 ℃ of temperature, add again an amount of Al-Sr alterant and go bad, guarantee that content of strontium is in required scope;
(d) use dry argon gas to pass into aluminium liquid the inside after rotten the finishing and carry out the refining degasification;
(e) the aluminium liquid after ventilation finishes leaves standstill appropriate time and namely can be used for casting electric armour clamp.
Further, in step (b), also will be to the titanium elements of input institute expense in the aluminium liquid, the perhaps intermediate materials of titaniferous.
Cast aluminium alloy material of the present invention has the characteristic that Al-Si-Mg is associated gold, and good casting manufacturability is arranged, and the workpiece of casting is strengthened through appropriate heat treatment, and its tensile strength reaches more than the 330MPa, and elongation is 2-5%, and Brinell hardness is greater than 80.Use this high strength cast aluminum alloys casting electric armour clamp can avoid producing thin spot at joint face, its thermal treatment process temperature is low, and the time is short, and cost is low.Product lightweight, constructability is installed, and good corrosion resistance, does not have electric energy loss.
Further specify the present invention below by specific embodiment.
Embodiment: the high strength cast aluminum alloys of the present embodiment preferably is grouped into by the one-tenth of following weight percent, and silicon is 12%, magnesium is 0.35%, strontium is 0.025%, titanium is 0.10%, iron is no more than 0.3%, surplus is aluminium.
Silicone content in this high strength cast aluminum alloys is about the Al-Si eutectic point, and the freezing range of alloy is narrow, and its flowability is relatively good, therefore is not easy to carry impurity in production process and enters in the product.Magnesium is separated out middle phase Mg in the tissue after timeliness thermal treatment
2The Si compound also is disperse state, and the tensile strength of material and Young's modulus all are improved.Titanium can form TiAl with aluminium
3Phase, non-spontaneous core when becoming crystallization, thus reach crystal grain thinning, the effect of reinforced alloys tissue.Strontium is surface active element, and the processing of going bad can improve plastic deformation ability and the end product quality of alloy, and mechanical property is significantly improved.Iron rule is the harmful element in the cast aluminium alloy, makes foundry goods fragility large, easy to crack, but can't eliminate iron fully in the aluminium alloy suitability for industrialized production, and therefore controlling iron level is no more than 0.3%, does not also substantially affect material property.
The high strength cast aluminum alloys manufacture method of the present embodiment is carried out successively according to following step,
(a) in smelting furnace, add the fine aluminium ingot, also can add a small amount of aluminium material that melts down, temperature is increased to 770 ℃, the fine aluminium ingot is melted fully be aluminium liquid;
(b) drop into silicon, magnesium and the titanium elements of institute's expense in the aluminium liquid again, perhaps contain the intermediate materials of above-mentioned element, make it abundant melting, general element silicon can use pure silicon, magnesium and titanium elements use magnalium and titanium aluminum alloy;
(c) then under 750 ℃ of temperature, be incubated 5～10 minutes, add again an amount of Al-Sr alterant and go bad, guarantee that content of strontium is in required scope;
(d) left standstill 8 minutes after rotten the finishing, use dry argon gas to pass into aluminium liquid the inside and carry out refining degasification, aeration time 4 minutes;
(e) the aluminium liquid after ventilation finishes left standstill 8 minutes, namely can be used for casting electric armour clamp.
The electric armour clamp foundry goods of casting also needs solution treatment and artificial aging after moulding, common solid solution holding temperature is 535 ± 5 ℃, and soaking time is 6～10h, and the solid solution entry time is wanted＜15s, and heat-eliminating medium is 60～100 ℃ of warm water; Timeliness adopts complete artificial aging, carries out in the 0.5h after solution treatment, and the timeliness holding temperature is 160 ± 5 ℃, and soaking time is 6～8h, and then air cooling is to room temperature.Electric armour clamp foundry goods after the above-mentioned processing namely has very good performance index, satisfies service requirements fully.
Claims (5)
1. electric armour clamp high strength cast aluminum alloys, it is characterized in that: the one-tenth by following weight percent is grouped into, and silicon is 11～13%, magnesium is 0.3～0.4%, strontium is 0.02～0.03%, iron is no more than 0.3%, surplus is aluminium.
2. electric armour clamp high strength cast aluminum alloys according to claim 1 is characterized in that: also contain in addition weight percent and be 0.08～0.15% titanium.
3. electric armour clamp high strength cast aluminum alloys according to claim 2, it is characterized in that: the one-tenth by following weight percent is grouped into, and silicon is 12%, magnesium is 0.35%, strontium is 0.025%, titanium is 0.10%, iron is no more than 0.3%, surplus is aluminium.
4. method of making the described aluminium alloy of claim 1 is characterized in that: carries out successively according to following step,
(a) in smelting furnace, add the fine aluminium ingot, temperature is increased to 750～790 ℃, the fine aluminium ingot is melted fully be aluminium liquid;
(b) drop into again silicon and the magnesium elements of institute's expense in the aluminium liquid, perhaps contain the intermediate materials of above-mentioned element, make it abundant melting;
(c) then under 720～750 ℃ of temperature, add again an amount of Al-Sr alterant and go bad, guarantee that content of strontium is in required scope;
(d) use dry argon gas to pass into aluminium liquid the inside after rotten the finishing and carry out the refining degasification;
(e) the aluminium liquid after ventilation finishes leaves standstill appropriate time and namely can be used for casting electric armour clamp.
5. manufacture method according to claim 4 is characterized in that: in step (b), also will drop into the titanium elements of institute's expense, the perhaps intermediate materials of titaniferous in the aluminium liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012103599824A CN102899537A (en) | 2012-09-25 | 2012-09-25 | High-strength casting aluminum alloy for electric power fittings and manufacturing method thereof |
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| CN2012103599824A CN102899537A (en) | 2012-09-25 | 2012-09-25 | High-strength casting aluminum alloy for electric power fittings and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555978A (en) * | 2013-10-09 | 2014-02-05 | 贵州安吉航空精密铸造有限责任公司 | Modification process for casting of aluminum-silicon alloy |
| CN103972805A (en) * | 2014-05-12 | 2014-08-06 | 国家电网公司 | Electric power fitting and aluminum silicon manganese alloy material for casting electric power fitting |
| CN106058766A (en) * | 2016-07-14 | 2016-10-26 | 云南新铜人实业有限公司 | Aluminum alloy strain clamp and manufacturing method thereof |
| CN106676296A (en) * | 2016-12-29 | 2017-05-17 | 新疆众和股份有限公司 | Production process of ZLD102 aluminum alloy |
| CN108179285A (en) * | 2018-01-17 | 2018-06-19 | 山东双港活塞股份有限公司 | Molten aluminum inoculating and refining handles all-in-one machine and its application method |
Citations (2)
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| JP2001234269A (en) * | 2000-02-17 | 2001-08-28 | Nissan Motor Co Ltd | Aluminum alloy die-cast molding excellent in dynamic characteristic and its producing method |
| CN201687590U (en) * | 2009-12-25 | 2010-12-29 | 江苏圆通汽车零部件有限责任公司 | Diesel engine body |
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2012
- 2012-09-25 CN CN2012103599824A patent/CN102899537A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001234269A (en) * | 2000-02-17 | 2001-08-28 | Nissan Motor Co Ltd | Aluminum alloy die-cast molding excellent in dynamic characteristic and its producing method |
| CN201687590U (en) * | 2009-12-25 | 2010-12-29 | 江苏圆通汽车零部件有限责任公司 | Diesel engine body |
Non-Patent Citations (1)
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| 廖恒成等: "Sr对Al-Si-Mg铸造合金中Mg2Si相合金结晶行为影响的研究", 《铸造》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555978A (en) * | 2013-10-09 | 2014-02-05 | 贵州安吉航空精密铸造有限责任公司 | Modification process for casting of aluminum-silicon alloy |
| CN103555978B (en) * | 2013-10-09 | 2015-11-25 | 贵州安吉航空精密铸造有限责任公司 | A kind of aluminum silicon alloy casting metamorphism treatment method |
| CN103972805A (en) * | 2014-05-12 | 2014-08-06 | 国家电网公司 | Electric power fitting and aluminum silicon manganese alloy material for casting electric power fitting |
| CN103972805B (en) * | 2014-05-12 | 2016-03-23 | 国家电网公司 | A kind of electric armour clamp and the Al-Si-Mn alloy material for casting this electric armour clamp |
| CN106058766A (en) * | 2016-07-14 | 2016-10-26 | 云南新铜人实业有限公司 | Aluminum alloy strain clamp and manufacturing method thereof |
| CN106676296A (en) * | 2016-12-29 | 2017-05-17 | 新疆众和股份有限公司 | Production process of ZLD102 aluminum alloy |
| CN108179285A (en) * | 2018-01-17 | 2018-06-19 | 山东双港活塞股份有限公司 | Molten aluminum inoculating and refining handles all-in-one machine and its application method |
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Application publication date: 20130130 |