CN103173639A - Method for adding metallic antimony in antimony modified aluminum alloy - Google Patents
Method for adding metallic antimony in antimony modified aluminum alloy Download PDFInfo
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- CN103173639A CN103173639A CN2013100849470A CN201310084947A CN103173639A CN 103173639 A CN103173639 A CN 103173639A CN 2013100849470 A CN2013100849470 A CN 2013100849470A CN 201310084947 A CN201310084947 A CN 201310084947A CN 103173639 A CN103173639 A CN 103173639A
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Abstract
The invention relates to a method for adding metallic antimony in an antimony modified aluminum alloy. The method comprises the following steps of: (1) weighing raw materials for smelting the aluminum alloy and the metallic antimony which is crushed blocks, and preheating the raw materials; (2) adding re-melted aluminum ingots preheated in the step (1) and metallic silicon into a smelting furnace, and heating together with a furnace body; (3) after the metal is completely melted in the furnace, adjusting the temperature of the molten aluminum to be 740 to 780 DEG C; (4) putting the crushed small metallic antimony blocks into a bell jar, suspending the bell jar by using a big stirring rake, repeatedly stirring the molten aluminum for 3 to 5 minutes, taking the bell jar down after the metallic antimony is completely melted, and uniformly stirring the alloy for 3 to 5 minutes by using the stirring rake; and (5) adding other metals or intermediate alloys as required. By using the purely metallic antimony, the intermediate smelting process of the antimony is eliminated, secondary smelting of the antimony is reduced, the purity of the melt is improved, the mechanical property of the manufactured aluminum alloy is superior to that of the antimony intermediate modified aluminum alloy, the tensile strength can reach 210 to 215MPa, and the elongation can reach 12 to 15 percent.
Description
Technical field
The invention belongs to field of metallurgy, relate to the metallurgy of cast aluminium alloy, in especially a kind of antimony metamorphic aluminium alloy, metallic antimony adds method.
Background technology
Cast aluminium alloy owing to will forming thick silicon metal, worsens alloy mechanical performance when solidifying.In order to improve the mechanical property of alloy, general to containing Si〉processing of all will going bad of 6% aluminum silicon alloy, with refinement sosoloid and primary silicon.At present, traditional metamorphism treatment method is to adopt sodium and sodium salt degeneration, though the method can be carried out refinement to eutectic effectively, has many problems on technique and alloy mass, easily produce subsurface porosity as foundry goods, rotten working lipe is short, the irony crucible is had corrosive nature etc.
Research discovery in recent years, the strontium modification effect is good, and has long-lasting; Strontium more can make primary α mutually tiny, even than sodium, and Eutectic Silicon in Al-Si Cast Alloys becomes short coralliform by the macrofiber shape, makes Eutectic Silicon in Al-Si Cast Alloys end circle passivation, can improve thus intensity, especially yield strength and the elongation of alloy.Therefore in actual production, useful Al-Sr master alloy substitutes the trend of sodium salt alterant.But in the automobile that Mechanical Properties of Aluminum Alloys is had relatively high expectations, Motorcycle Aluminum Alloy structural part were made, strontium was rotten due to easy air-breathing and and C
2Cl
6Easily producing surface imperfection etc. Deng refining agent in reacting, is not optimal alterant in this field.
The mechanical properties such as the tensile strength that the aluminum silicon alloy thermal treatment of antimony metamorphic is later and elongation all are better than the rotten alloy of strontium.And antimony is very abundant in China's standing stock, and produced quantity is large, and is cheap, and producing and manufacturing technique is easy, and modification effect has long-lastingly, so it is a kind of very good alterant.
When using antimony metamorphic, the add-on of antimony is for being generally 0.1%～0.4%, and the density of antimony is 6.67 g/cm
3, large 2.5 times than aluminium, directly add in aluminium liquid, can produce gravity segregation, wayward composition is therefore generally add after refining with the form of Al-Sb master alloy.But the preparation of Al-Sb master alloy has increased the technological process of production, causes the secondary consumption of the energy.Therefore, can seek a kind of method on the decrease between under the prerequisite of alloy secondary smelting, can guarantee again to eliminate pure metal antimony and directly join the segregation harm that causes in aluminium liquid, be a very significant problem of tool.
By retrieval, not yet find the publication document relevant to present patent application.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, the method that adds of metallic antimony in a kind of antimony metamorphic aluminium alloy is provided, realization replaces aluminium antimony master alloy to produce the antimony metamorphic aluminium alloy with metallic antimony, the energy-saving and emission-reduction in Industrial processes have been realized, and improved the cleanliness factor of alloy, improve under the prerequisite of aluminium alloy quality, greatly reduce production cost.
The objective of the invention is to be achieved through the following technical solutions:
In a kind of antimony metamorphic aluminium alloy metallic antimony add method, step is:
⑴ take raw material and the metallic antimony of smelting aluminium alloy, and wherein metallic antimony is broken good little bulk, wherein above-mentioned all raw materials is carried out thermal pretreatment;
⑵ add aluminium alloy stock preheated in step ⑴ in smelting furnace, and heat up with body of heater;
⑶ after metal melts fully in stove, adjusts between temperature of aluminum liquid to 740～780 ℃;
⑷ put into bell jar to the good metal antimony regulus of fragmentation, hangs bell jar with stirring drag, back and forth stirred 3～5 minutes in aluminium liquid, is convenient to metallic antimony and evenly enters in aluminium liquid; After metallic antimony melts fully, take off bell jar, use raker stirrer uniform stirring alloy 3～5 minutes;
⑸ add antimony complete after, add as required other metal or master alloy, slagging-off, carry out composition, pin hole, metallographic structure and mechanical property after degasification and detect.
And the raw material of described smelting aluminium alloy comprises remelted aluminum ingot, Pure Silicon Metal.
And the addition of described metallic antimony is the 0.1-0.4% of aluminium alloy stock gross weight.
And described bell jar bottom and sidepiece are provided with the aperture that the rear metallic antimony of dissolving flows out.
Advantage of the present invention and beneficial effect are:
1, the present invention uses pure metal antimony to save the middle process of founding of antimony, reduced the secondary smelting of antimony, improved the purity of melt, the mechanical property of manufacturing aluminium alloy is better than the rotten aluminium alloy of aluminium antimony master alloy, tensile strength can reach 210～215Mpa, and unit elongation can reach 12～15%.
2, the present invention uses metallic antimony to replace aluminium antimony master alloy to the aluminium alloy processing of go bad, has saved the preparation process of aluminium antimony master alloy, has shortened the flow process that alloy is founded, the promotion energy-saving and emission-reduction.
3, elemental composition of the present invention is even, modification effect has long-lasting, and modification process is easy to be reliable, alterant add the model circle wide, can obtain good modification effect between 0.1%～0.4%, overcome directly add the uppity difficult problem of metallic antimony composition in aluminium alloy melt.
4, due to the aboundresources of China's antimony, cheap, directly use metallic antimony, greatly the economical with materials purchase cost.
Description of drawings
Fig. 1 is the rotten forward and backward metallographic structure comparison diagram of metallic antimony of the present invention, and wherein Fig. 1 a is for before rotten, and Fig. 1 b is for after rotten;
Fig. 2 is the alloy mechanical property comparison diagram of the present invention and traditional technology (aluminium antimony master alloy is rotten).
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
The below carries out the detailed description of specific examples of the present invention take the production of aluminium alloy BL.AS7G03 product as example:
Need to prove, the present embodiment is take the BL.AS7G03 product as example, as long as comprise the aluminium alloy of remelted aluminum ingot, Pure Silicon Metal, the present invention is suitable for.
In a kind of antimony metamorphic aluminium alloy metallic antimony add method, step is:
⑴ by BL.AS7G03 al alloy component requirement (Si:6.6～7.2; Mg:0.35～0.45; Ti:0.10～0.16; Sb:0.11～0.16; Al is surplus), total batching is 16000Kg, take remelted aluminum ingot 14614.4kg, Pure Silicon Metal 1104kg, metallic antimony 22.4kg, aluminium titanium master alloy (AlTi10) 192kg, MAGNESIUM METAL 67.2kg, standby the broken frustillatum of metallic antimony, broken little block size does not have special requirement, and all material is carried out conventional thermal pretreatment.
⑵ add remelted aluminum ingot preheated in step ⑴ and Pure Silicon Metal in smelting furnace, and heat up with body of heater.
⑶ after metal melts fully in stove, and adjusting temperature of aluminum liquid is 760 ℃.
⑷ put into bell jar to the good biscuit metal antimony of fragmentation, and this bell jar bottom and sidepiece are respectively arranged with approximately 1cm of area
2Aperture so that the antimony of melting can flow into aluminium liquid by aperture is inner, make alloying constituent more even, prevent the antimony element segregation; Hang bell jar with stirring drag, back and forth stirred 3 minutes in aluminium liquid, evenly enter in aluminium liquid after making the metallic antimony fusing.Treat that the metallic antimony fusing is complete, take off bell jar, use raker stirrer uniform stirring alloy 4 minutes.
⑸ add antimony complete after, add as required its metal or master alloy, slagging-off, carry out composition, pin hole, metallographic structure and mechanical property after degasification and detect.
The comparison diagram of metallographic structure is referring to Fig. 1; The contrast of alloy mechanical property is referring to Fig. 2.
After testing, the al alloy component that uses particular form to add metallic antimony to go bad is even, the Sb constituent content is 0.135%, approaches with theoretical value.The Pinhole one-level, three grades of modification effects.Fractograph is fine and close, there is no serious shrinkage cavity, slag and non-metallic inclusion.Tensile strength 214.6Mpa, unit elongation 13.8%.
Claims (4)
- In an antimony metamorphic aluminium alloy metallic antimony add method, it is characterized in that: step is:⑴ take raw material and the metallic antimony of smelting aluminium alloy, and wherein metallic antimony is broken good little bulk, wherein above-mentioned all raw materials is carried out thermal pretreatment;⑵ add aluminium alloy stock preheated in step ⑴ in smelting furnace, and heat up with body of heater;⑶ after metal melts fully in stove, adjusts between temperature of aluminum liquid to 740～780 ℃;⑷ put into bell jar to the good metal antimony regulus of fragmentation, hangs bell jar with stirring drag, back and forth stirred 3～5 minutes in aluminium liquid, is convenient to metallic antimony and evenly enters in aluminium liquid; After metallic antimony melts fully, take off bell jar, use raker stirrer uniform stirring alloy 3～5 minutes;⑸ add antimony complete after, add as required other metal or master alloy, slagging-off, carry out composition, pin hole, metallographic structure and mechanical property after degasification and detect.
- In antimony metamorphic aluminium alloy according to claim 1 metallic antimony add method, it is characterized in that: the raw material of described smelting aluminium alloy comprises remelted aluminum ingot, Pure Silicon Metal.
- In antimony metamorphic aluminium alloy according to claim 1 metallic antimony add method, it is characterized in that: the addition of described metallic antimony is the 0.1-0.4% of aluminium alloy stock gross weight.
- In antimony metamorphic aluminium alloy according to claim 1 metallic antimony add method, it is characterized in that: described bell jar bottom and sidepiece are provided with the aperture of metallic antimony outflow after dissolving.
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| CN2013100849470A CN103173639A (en) | 2013-03-18 | 2013-03-18 | Method for adding metallic antimony in antimony modified aluminum alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498757A (en) * | 2014-12-15 | 2015-04-08 | 贵州安吉航空精密铸造有限责任公司 | Antimony modification treatment method for ZL116 aluminum alloy sand casting |
| CN110144500A (en) * | 2019-06-28 | 2019-08-20 | 广西大学 | One kind alusil alloy of high-strength and high ductility containing antimony and preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102207A (en) * | 1985-04-01 | 1986-07-02 | 陕西机械学院 | In cast aluminium alloy, add the method for alloying element tellurium |
-
2013
- 2013-03-18 CN CN2013100849470A patent/CN103173639A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102207A (en) * | 1985-04-01 | 1986-07-02 | 陕西机械学院 | In cast aluminium alloy, add the method for alloying element tellurium |
Non-Patent Citations (1)
| Title |
|---|
| 丁文江等: "《Al-Si合金中锶、钠、锑变质作用机理》", 《兵器材料科学与工程》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104498757A (en) * | 2014-12-15 | 2015-04-08 | 贵州安吉航空精密铸造有限责任公司 | Antimony modification treatment method for ZL116 aluminum alloy sand casting |
| CN110144500A (en) * | 2019-06-28 | 2019-08-20 | 广西大学 | One kind alusil alloy of high-strength and high ductility containing antimony and preparation method |
| CN110144500B (en) * | 2019-06-28 | 2020-08-07 | 广西大学 | Antimony-containing high-strength high-toughness aluminum-silicon alloy and preparation method thereof |
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