CN102690964A - Alterant for hypereutectic aluminum-silicon alloy primary silicon and preparation method thereof - Google Patents
Alterant for hypereutectic aluminum-silicon alloy primary silicon and preparation method thereof Download PDFInfo
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- CN102690964A CN102690964A CN2012101940477A CN201210194047A CN102690964A CN 102690964 A CN102690964 A CN 102690964A CN 2012101940477 A CN2012101940477 A CN 2012101940477A CN 201210194047 A CN201210194047 A CN 201210194047A CN 102690964 A CN102690964 A CN 102690964A
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Abstract
The invention discloses an alterant used for refining hypereutectic aluminum-silicon alloy primary silicon. The alterant comprises 0.1-30 wt% of silicon, 0.001-30 wt% of iron and the balance of aluminum in mass. The invention also discloses a preparation method of the alterant used for refining the hypereutectic aluminum-silicon alloy primary silicon. The method comprises the steps that commercial purity aluminum or high purity aluminum is melted in an intermediate frequency furnace, then weighed commercial purity silicon or high purity silicon and ingot iron are sequentially added, and heating is continued until the components are completely molten. The molten metal is thermally insulated and stirred and then is poured into ingots or made into wires. The alterant for the hypereutectic aluminum-silicon alloy primary silicon contains a nucleation substrate of the primary silicon, and the nucleation rate of the primary silicon is greatly improved, so that the primary silicon is refined. When the alterant is added into hypereutectic aluminum-silicon alloy in a proper proportion, the modification effect on the primary silicon is obvious, and the effect of the alterant is superior to that of the conventional AlP alterant.
Description
Technical field
The invention belongs to the metallic substance technical field, relate to a kind of cast Al-Si alloy technology, particularly a kind of transcocrystallized Al-Si alloy primary silicon alterant and preparation method thereof.
Background technology
Transcocrystallized Al-Si alloy is owing to its good wear resistance, and characteristics such as volume stability obtain widespread use in automobile industry.But primary silicon is thick under the state of nature, worsens its performance.For the performance need that makes full use of transcocrystallized Al-Si alloy to the primary silicon processing of going bad, refinement primary silicon size.Traditional method is in melt, to add master alloy or the salt that contains the P element.But add the microcosmic salt contaminate environment, it is complicated to contain the preparation of P master alloy, and needs long insulation to reach modification effect.
Summary of the invention
The present invention provides a kind of transcocrystallized Al-Si alloy primary silicon alterant and preparation method thereof in order to solve the problems of the technologies described above, and this alterant ability refinement primary silicon improves the primary silicon nucleation rate.
To achieve these goals, the present invention adopts following technical scheme.
A kind of transcocrystallized Al-Si alloy primary silicon alterant, silicon 0.1-30%, iron 0.001-30%, surplus is an aluminium; In mass.
Said transcocrystallized Al-Si alloy primary silicon alterant, preferred version do, silicon 0.1-25%, and iron 0.01-25%, surplus is an aluminium; In mass.
The preparation method of above-mentioned transcocrystallized Al-Si alloy primary silicon alterant comprises that step is following:
(1) takes by weighing commercial-purity aluminium or rafifinal, industrial pure silicon or HIGH-PURITY SILICON, technically pure iron raw material by mass ratio;
(2) in smelting furnace, fine aluminium is melted to 700-900 ℃, adds load weighted industrial pure silicon or HIGH-PURITY SILICON and technically pure iron then, continue heating, insulation is to fusion fully;
(3) above-mentioned melt is cast into ingot casting or continuous casting and rolling becomes wire rod.
The invention has the beneficial effects as follows that transcocrystallized Al-Si alloy primary silicon alterant contains the forming core substrate of primary silicon, improve the nucleation rate of primary silicon greatly, thus the refinement primary silicon.Can find that from the comparison of embodiment and Comparative Examples when this alterant added in the transcocrystallized Al-Si alloy in proper ratio, its modification effect to primary silicon was tangible.And its effect is better than traditional AlP alterant now, when being lower than the AlP addition, can making primary silicon refine to size and be lower than the state after AlP goes bad.
Description of drawings
Fig. 1 is embodiment 1 naturally cooling metallograph under 500 times opticmicroscope in sand mold;
Fig. 2 is embodiment 2 naturally cooling metallograph under 500 times opticmicroscope in sand mold;
Fig. 3 is embodiment 3 naturally cooling metallograph under 500 times opticmicroscope in sand mold;
Fig. 4 is embodiment 4 naturally cooling metallograph under 500 times opticmicroscope in sand mold;
Fig. 5 is embodiment 5 naturally cooling metallograph under 500 times opticmicroscope in sand mold;
Fig. 6 is Comparative Examples 1 naturally cooling metallograph under 500 times opticmicroscope in sand mold;
Fig. 7 is Comparative Examples 2 naturally cooling metallograph under 500 times opticmicroscope in sand mold.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Embodiment 1:
(1) press commercial-purity aluminium 60%, silicon 30%, the mass ratio of iron 10% takes by weighing raw material;
(2) with fine aluminium fusing and be warming up to 850 ℃, add load weighted industrial pure silicon and technically pure iron then, be stirred to fusion fully;
(3) above-mentioned melt is cast into ingot casting or continuous casting and rolling becomes wire rod.
Fusing Al-15Si alloy in intermediate frequency furnace; To fusing fully; Ratio according to Al-15Si alloy mass 0.3% adds the transcocrystallized Al-Si alloy primary silicon alterant that present embodiment prepares, and is poured in the sand mold according to normal process, and finished product cast is organized pattern such as Fig. 1 of microscopically.
Embodiment 2:
(1) press commercial-purity aluminium 80%, silicon 15%, the mass ratio of iron 5% takes by weighing raw material;
(2) with fine aluminium fusing and be warming up to 850 ℃, add load weighted industrial pure silicon and technically pure iron then, be stirred to fusion fully;
(3) above-mentioned melt is cast into ingot casting or continuous casting and rolling becomes wire rod.
Fusing Al-15Si alloy in intermediate frequency furnace; To fusing fully; Ratio according to Al-15Si alloy mass 0.3% adds the transcocrystallized Al-Si alloy primary silicon alterant that present embodiment prepares, and is poured in the sand mold according to normal process, and finished product cast is organized pattern such as Fig. 2 of microscopically.
Embodiment 3:
(1) press commercial-purity aluminium 98.8%, silicon 1%, the mass ratio of iron 0.2% takes by weighing raw material;
(2) with fine aluminium fusing and be warming up to 850 ℃, add load weighted industrial pure silicon and technically pure iron then, be stirred to fusion fully;
(3) above-mentioned melt is cast into ingot casting or continuous casting and rolling becomes wire rod.
Fusing Al-15Si alloy in intermediate frequency furnace; To fusing fully; Ratio according to Al-15Si alloy mass 0.3% adds the transcocrystallized Al-Si alloy primary silicon alterant that present embodiment prepares, and is poured in the sand mold according to normal process, and finished product cast is organized pattern such as Fig. 3 of microscopically.
Embodiment 4:
(1) press commercial-purity aluminium 60%, silicon 10%, the mass ratio of iron 30% takes by weighing raw material;
(2) with fine aluminium fusing and be warming up to 850 ℃, add load weighted industrial pure silicon and technically pure iron then, be stirred to fusion fully;
(3) above-mentioned melt is cast into ingot casting or continuous casting and rolling becomes wire rod.
Fusing Al-15Si alloy in intermediate frequency furnace; To fusing fully; Ratio according to Al-15Si alloy mass 0.3% adds the transcocrystallized Al-Si alloy primary silicon alterant that present embodiment prepares, and is poured in the sand mold according to normal process, and finished product cast is organized pattern such as Fig. 4 of microscopically.
Embodiment 5:
(1) press commercial-purity aluminium 70%, silicon 10%, the mass ratio of iron 20% takes by weighing raw material;
(2) with fine aluminium fusing and be warming up to 850 ℃, add load weighted industrial pure silicon and technically pure iron then, be stirred to fusion fully;
(3) above-mentioned melt is cast into ingot casting or continuous casting and rolling becomes wire rod.
Fusing Al-15Si alloy in intermediate frequency furnace; To fusing fully; Ratio according to Al-15Si alloy mass 0.3% adds the transcocrystallized Al-Si alloy primary silicon alterant that present embodiment prepares, and is poured in the sand mold according to normal process, and finished product cast is organized pattern such as Fig. 5 of microscopically.
Comparative Examples 1:
Fusing Al-15Si alloy to fusing fully, does not add any primary silicon alterant in intermediate frequency furnace, is poured in the sand mold pattern of finished product microscopically such as Fig. 4 according to normal process.
Comparative Examples 2:
Fusing Al-15Si alloy to fusing fully, adds 1% traditional AlP alterant by mass ratio in intermediate frequency furnace, is poured in the sand mold pattern of finished product microscopically such as Fig. 5 according to normal process.
See that from embodiment and the last metallographic structure of Comparative Examples medium casting the effect of transcocrystallized Al-Si alloy primary silicon alterant of the present invention is obvious.Can find that with the Comparative Examples contrast along with the adding of transcocrystallized Al-Si alloy primary silicon alterant of the present invention, the size of primary silicon significantly reduces, and be accompanied by the raising of primary silicon nucleation rate.On the one hand; Transcocrystallized Al-Si alloy primary silicon alterant of the present invention acts on the low add-on the modifying-refining of primary silicon can show good effect; On the other hand; Compare traditional AlP alterant, transcocrystallized Al-Si alloy primary silicon alterant modification effect of the present invention is better, and the size after the size compared AlP that can make primary silicon on the suitable addition is rotten is littler.
Though the above-mentioned accompanying drawing specific embodiments of the invention that combines is described; But be not restriction to protection domain of the present invention; One of ordinary skill in the art should be understood that; On the basis of technical scheme of the present invention, those skilled in the art need not pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (4)
1. a transcocrystallized Al-Si alloy primary silicon alterant is characterized in that, silicon 0.1-30%, and iron 0.001-30%, surplus is an aluminium; In mass.
2. transcocrystallized Al-Si alloy primary silicon alterant as claimed in claim 1 is characterized in that, silicon 0.1-25%, and iron 0.01-25%, surplus is an aluminium; In mass.
3. the preparation method of transcocrystallized Al-Si alloy primary silicon alterant as claimed in claim 1 comprises that step is following:
(1) takes by weighing commercial-purity aluminium or rafifinal, industrial pure silicon or HIGH-PURITY SILICON, technically pure iron raw material by mass ratio;
(2) in smelting furnace, fine aluminium is melted to 700-900 ℃, adds load weighted industrial pure silicon or HIGH-PURITY SILICON and technically pure iron then, continue heating, insulation is to fusion fully;
(3) above-mentioned melt is cast into ingot casting or continuous casting and rolling becomes wire rod.
4. the preparation method of transcocrystallized Al-Si alloy primary silicon alterant as claimed in claim 3 is characterized in that, in the said step (2), in smelting furnace, fine aluminium is melted to 750-850 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925764A (en) * | 2012-11-15 | 2013-02-13 | 山东大学 | Dual-modification method of eutectic and hypereutectic aluminum-silicon alloy |
| CN104439206A (en) * | 2014-11-29 | 2015-03-25 | 山东大学 | Application of silicon grain heterogeneous nucleation enhancer in promotion of nucleation of silicon grains in aluminum-silicon alloy melt |
| CN108754195A (en) * | 2018-06-29 | 2018-11-06 | 张家港江苏科技大学产业技术研究院 | A kind of alterant and preparation method thereof to go bad for Fe-riched phase in hypereutectic high ferro alusil alloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1471589A (en) * | 2000-10-02 | 2004-01-28 | Preparing aluminium-silicon alloys |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1471589A (en) * | 2000-10-02 | 2004-01-28 | Preparing aluminium-silicon alloys |
Non-Patent Citations (2)
| Title |
|---|
| 《中国优秀博硕士学位论文全文数据库（硕士） 工程科技Ⅰ辑》 20040930 张维维 "Al-Si-Fe合金第二相形态控制技术研究" 表2-2 1-4 , 第3期 * |
| 张维维: ""Al-Si-Fe合金第二相形态控制技术研究"", 《中国优秀博硕士学位论文全文数据库（硕士） 工程科技Ⅰ辑》, no. 3, 30 September 2004 (2004-09-30), pages 2 - 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925764A (en) * | 2012-11-15 | 2013-02-13 | 山东大学 | Dual-modification method of eutectic and hypereutectic aluminum-silicon alloy |
| CN104439206A (en) * | 2014-11-29 | 2015-03-25 | 山东大学 | Application of silicon grain heterogeneous nucleation enhancer in promotion of nucleation of silicon grains in aluminum-silicon alloy melt |
| CN108754195A (en) * | 2018-06-29 | 2018-11-06 | 张家港江苏科技大学产业技术研究院 | A kind of alterant and preparation method thereof to go bad for Fe-riched phase in hypereutectic high ferro alusil alloy |
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