CN102605204A - Aluminum alloy modification technology - Google Patents
Aluminum alloy modification technology Download PDFInfo
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- CN102605204A CN102605204A CN2012100421872A CN201210042187A CN102605204A CN 102605204 A CN102605204 A CN 102605204A CN 2012100421872 A CN2012100421872 A CN 2012100421872A CN 201210042187 A CN201210042187 A CN 201210042187A CN 102605204 A CN102605204 A CN 102605204A
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- aluminum liquid
- refining
- aluminium liquid
- aluminum
- liquid
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Abstract
The invention discloses an aluminum alloy modification technology comprising the steps of aluminum liquid refining and aluminum liquid purifying. The aluminum liquid refining step comprises processes that: the temperature of the aluminum liquid is increased to 710-725 DEG C; hydrogen and oxidized inclusions are removed from the aluminum liquid; the aluminum liquid is further refined, such that N2 is removed. The aluminum liquid purifying step comprises processes that: a modifying agent is added to the refined aluminum liquid; refining and degassing are carried out for 5min; a sodium-free covering agent is added to the aluminum liquid, and the aluminum liquid is settled for 8-10min; and the aluminum liquid is used for casting. With the aluminum alloy modification technology provided by the invention, the purification degree of the aluminum liquid is effectively improved, secondary pollution caused by intermediate reactants is reduced, comprehensive mechanical properties of a molded casting are improved, and equipment loss caused by deteriorated sodium salt is eliminated. No harmful gas is produced in the aluminum alloy modification technology, and the technology is easy to operate and to control.
Description
Technical field
The present invention relates to the rotten technology of a kind of duraluminum.
Background technology
During metal material processing is made; Particularly as the products such as aluminum alloy casting of automobile, the motorcycle brake pump housing; Specification of quality to foundry goods inside is higher; Organize with improving for the refinement material grains, materials processed manufacturing firm is employed in production process more and adopts the rotten technology of metal, to reach the purpose that improves the material over-all properties.Habitual rotten scheme has sodium salt degeneration and strontium to go bad in the aluminum alloy materials production; The sodium salt degeneration effect is relatively good; But the decline after rotten can influence the performance and the compactness of material; The modification effect time length is 30-40 minute, and the appurtenant that produces in this process produces than severe corrosive melt stove and instrument, also can produce secondary pollution to aluminium liquid; Strontium metamorphic facies comparison sodium salt degeneration can be used as a kind of long-acting rotten method, is prone to cause the generation oxide inclusion in the aluminium liquid possibly cause the inner pore that forms of foundry goods simultaneously but method is improper.
Summary of the invention
The technical problem that the present invention will solve provides the rotten technology of a kind of duraluminum, and the sodium salt degeneration of can forgoing is to the corrodibility of instrument and the casting flaw in the solution strontium metamorphic process.
For solving the problems of the technologies described above, technical scheme of the present invention is the rotten technology of a kind of duraluminum, comprises the steps: that refining of aluminium liquid and aluminium liquid purify; The refining of said aluminium liquid comprises and promotes temperature of aluminum liquid to 710 ℃-725 ℃, then to the dehydrogenation of aluminium liquid, remove oxidation and be mingled with, refining removes N2 then; Said aluminium liquid purifies and comprises in the aluminium liquid after refining and add alterant, and refining degasification 5 minutes adds no sodium insulating covering agent then in aluminium liquid; Static 8-10 minute, cast then.After refining of aluminium liquid and aluminium liquid purify and accomplish; Gas and oxide inclusion in the aluminium liquid are eliminated; The foundry goods internal soundness that pours into is even and compactness is better, when in aluminium liquid, adding alterant, and refining degasification 5 minutes; Having prevented that small amounts thing reaction in alterant and the aluminium liquid from producing is mingled with and causes secondary pollution, keeps the degree of purification of aluminium liquid; Add no sodium insulating covering agent, effectively hydrogen is inhaled in secluding air control, prevents that aluminium and the oxidation of duraluminum element from burning, and can assist to remove hydrogen and the inclusion in the aluminium liquid, makes the separation of slag liquid totally, has the scarfing cinder effect concurrently.
As a kind of improvement, said alterant is the strontium bar.Strontium bar metamorphic facies is more more long-acting than other alterants.
The duraluminum that the present invention the adopted technology that goes bad; Effectively improved the degree of purification of aluminium liquid; Reduce the secondary pollution of intermediate reaction deposits yields, improved the comprehensive mechanical performance of foundry goods after the moulding, the loss that sodium salt degeneration causes melt equipment of having forgone; No obnoxious flavour produces in the rotten technology of duraluminum among the present invention simultaneously, is easy to safety operation control.
Embodiment
Technical scheme of the present invention is the rotten technology of a kind of duraluminum; Comprise two steps: one, refined aluminum liquid two, purification aluminium liquid; After refining of aluminium liquid and aluminium liquid purified and accomplishes, gas and oxide inclusion in the aluminium liquid were eliminated, and the foundry goods internal soundness that pours into is even and compactness is better.The refining of said aluminium liquid comprises and promotes temperature of aluminum liquid to 710 ℃, utilize then the rotation getter to the dehydrogenation of aluminium liquid, remove oxidation and be mingled with, dehydrogenation specifically is meant the hydrogen of removing in the aluminium liquid with aluminium liquid surface in this programme, to avoid forming blow hole.Then refining removes N
2, be similarly the formation of avoiding blow hole.Under the high temperature to the dehydrogenation of aluminium liquid, remove oxidation and be mingled with, realize obtaining the aluminium liquid of high purification, reduced the secondary pollution that produces in the rotten process of duraluminum.After accomplishing the refining of aluminium liquid; Carry out the cleansing operation of aluminium liquid, add the strontium bar in the aluminium liquid after refining, cooperate rotation getter refining degasification 5 minutes simultaneously; Preventing that small amounts thing reaction in strontium and the aluminium liquid from producing is mingled with and causes secondary pollution, keeps the degree of purification of aluminium liquid; In aluminium liquid, add no sodium insulating covering agent then, effectively secluding air is inhaled hydrogen with control, prevents that aluminium and the oxidation of duraluminum element from burning, and can assist to remove hydrogen and the inclusion in the aluminium liquid, makes the separation of slag liquid totally, has the scarfing cinder effect concurrently.Static 8-10 minute, cast then.
Among the present invention program, aluminium liquid refining temperature can the highlyest be promoted to 725 ℃, to reach better refining effect; The preferably rotten more long lasting strontium bar of alterant, other can realize environmental protection certainly, the alterant of modification effect is also in protection scope of the present invention efficiently.
Except that above-mentioned preferred embodiment, the present invention also has other embodiment, and those skilled in the art can make various changes and distortion according to the present invention, only otherwise break away from spirit of the present invention, all should belong to the defined scope of accompanying claims of the present invention.
Claims (2)
1. the rotten technology of a duraluminum is characterized in that: comprise the steps: that the refining of aluminium liquid and aluminium liquid purify, the refining of said aluminium liquid comprises and promotes temperature of aluminum liquid to 710 ℃-725 ℃, then to the dehydrogenation of aluminium liquid, remove oxidation and be mingled with, refining is except that N then
2, said aluminium liquid purifies and comprises in the aluminium liquid after refining and add alterant, and refining degasification 5 minutes adds no sodium insulating covering agent then in aluminium liquid, static 8-10 minute, pour into a mould then.
2. according to the rotten technology of claim 1 duraluminum, it is characterized in that: said alterant is the strontium bar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN2012100421872A CN102605204A (en) | 2012-02-23 | 2012-02-23 | Aluminum alloy modification technology |
Applications Claiming Priority (1)
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CN2012100421872A CN102605204A (en) | 2012-02-23 | 2012-02-23 | Aluminum alloy modification technology |
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CN102605204A true CN102605204A (en) | 2012-07-25 |
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CN2012100421872A Pending CN102605204A (en) | 2012-02-23 | 2012-02-23 | Aluminum alloy modification technology |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN112680621A (en) * | 2020-12-15 | 2021-04-20 | 鹰普航空科技有限公司 | Modification method of thin-wall medical seat aluminum alloy precision casting |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1134299A1 (en) * | 2000-02-28 | 2001-09-19 | Hydelko AS | Master alloy for modification and grain refining of hypoeutectic and eutectic Al-Si foundry alloys |
CN1619003A (en) * | 2004-10-26 | 2005-05-25 | 沈阳工业大学 | High strength casted aluminium silicon series alloy and its preparation method |
CN101532861A (en) * | 2009-04-17 | 2009-09-16 | 周岳建 | A method for manufacturing water meter housing by high strength cast aluminum alloy and a product thereof |
-
2012
- 2012-02-23 CN CN2012100421872A patent/CN102605204A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1134299A1 (en) * | 2000-02-28 | 2001-09-19 | Hydelko AS | Master alloy for modification and grain refining of hypoeutectic and eutectic Al-Si foundry alloys |
CN1619003A (en) * | 2004-10-26 | 2005-05-25 | 沈阳工业大学 | High strength casted aluminium silicon series alloy and its preparation method |
CN101532861A (en) * | 2009-04-17 | 2009-09-16 | 周岳建 | A method for manufacturing water meter housing by high strength cast aluminum alloy and a product thereof |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN112680621A (en) * | 2020-12-15 | 2021-04-20 | 鹰普航空科技有限公司 | Modification method of thin-wall medical seat aluminum alloy precision casting |
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Application publication date: 20120725 |