CN1098446A - Aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent and production technique thereof - Google Patents
Aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent and production technique thereof Download PDFInfo
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- CN1098446A CN1098446A CN 93109473 CN93109473A CN1098446A CN 1098446 A CN1098446 A CN 1098446A CN 93109473 CN93109473 CN 93109473 CN 93109473 A CN93109473 A CN 93109473A CN 1098446 A CN1098446 A CN 1098446A
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Abstract
The invention belongs to cast aluminium alloy aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent and production technique thereof.
The refining deterioration agent that the present invention adopts the Al-Sr-RE ternary alloy to do, reach 4-6 hour rotten working lipe, and alloy phase rotten with traditional technology Na salt, hexachloroethane refining gained can be brought up to 2 grades from 4 grades than pinhole rate.
Description
The invention belongs to the production technique of cast aluminium alloy with aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent.
At present, industrial at cast aluminium alloy, what people generally adopted all is that the primary sodium salt is made alterant, use the hexachloroethane refining before rotten, take off short, bristly hair or beard, static 5-10 minute after the refining after, the processing of going bad, this is indispensable two to go on foot operations in the fusion process.Though hexachloroethane and three salt refinement and denaturation effects are better, this method easily is mingled with, contaminate environment, etching apparatus, and the sodium deteriorating time is very short, has only 30-40 minute, does not satisfy the needs of extensive continuous casting.
The early eighties people begin one's study and make alterant with strontium, the clear 59-233090 of Japanese Patent Laid discloses with the Sr-Al alloy as mother alloy the cast aluminium alloy processing of going bad, find strontium rotten have long-lasting, but its industrial scale is little, every stove can only be produced 1kg left and right sides Al-Sr alloy, and its Faradaic current has only 26.5A.
" Special Processes of Metal Castings and non-ferrous metal " magazine disclosed people such as Jilin Industry University Lee road contain " rare earth element is to the research of inclusion influence in the aluminum-copper alloy " in 1989, pointed out that rare earth degasification impurity-eliminating effect compares C
2Cl
6Want to do well, and provide rare earth degasification removal of impurities The Characteristic Study result.
The purpose of this invention is to provide a kind of employing Al-Sr-RE ternary alloy as alterant, and produce the production technique of aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent with the electrolysis of fused chloride salt method.
The present invention adopts electrolysis of fused chloride salt and codeposition Al-Sr-RE alloy thereof, uses industrial SrCl
2, 6H
2O, KCl, NaCl, RECL
3, 6H
2O is with SrCl
2, 6H
2O and RECl
3, 6H
2The O thermal dehydration makes it become SrCl
2, RECl
3With SrCl
2, RECl
3, NaCl, KCl be by weight 5: 1: 2: 2 make ionogen after mixing.
Electrolytic process: take by weighing 99.5%Al 30～32kg earlier, add electrolyzer, ionogen 30～the 40kg of above-mentioned four kinds of salt that prepare is joined in the electrolyzer, and logical direct current feeds voltage 6-8V behind the heating and melting, electric current 400-600A, electrolysis 4-8 hour, take out the Al-Sr-RE alloy cast ingot, detect Sr content 4～6% in the alloy, RE 0.2～1.0%, and this alloy is as refining deterioration agent.
Elder generation's preheating when using the Al-Sr-RE alterant, then after the aluminium alloy fusion, when temperature is raised to 730 ℃ ± 10 ℃, be pressed in the aluminium liquid with the bell jar alterant that preheating is good, add-on is 1% of an aluminium water weight, fusion after 3-5 minute, gentle agitation, skimmed static 3 minutes of back, cast in static 5 minutes.The gained cast properties is as table 1(while and C
2Cl
6The sodium salt degeneration agent relatively).
Different alterants are to ZL
101The influence of cast aluminium alloy mechanical property
The present invention is owing to adopt the Al-Sr-RE alloy as its Eutectic Silicon in Al-Si Cast Alloys and hypoeutectic silicon cast aluminium alloy refining agent, its refining effect can with C
2Cl
6Than beautiful, obviously reduce the pinhole rate and the impurity of foundry goods simultaneously, reach 4-6 hour rotten working lipe, and it is pollution-free, etching apparatus not, can improve foundry goods normal temperature and pyritous mechanical property and thermal stability, this alloy melting point is low, has only 650 ℃-660 ℃, in castingprocesses, it is added in the aluminium alloy as long as all fused aluminium water good fluidity, not shrinkage cavity in 3-5 minute, even the foundry goods of complex geometry does not go out waste product yet, the present invention is reduced to a step with two step of traditional casting smelting operation in addition, has improved production efficiency, improves work situation.
With the alloy of the rotten hexachloroethane refining gained of traditional technology Na salt, its pinhole rate is 4 grades, reaches 2 grades with Al-Sr-RE ternary alloy refinement and denaturation gained alloy pinhole rate of the present invention.
Embodiment provided by the invention is as follows:
Embodiment 4:
The Al-Sr-RE ternary alloy made from embodiment 1 is worked as ZL as refining deterioration agent
101After the cast aluminium alloy fusion, during 730 ℃ ± 10 ℃ of temperature, with bell jar the good Al-Sr-RE ternary alterant of preheating in advance is pressed in the aluminium liquid, add-on is 1% of an aluminium water weight, fusion after 3 minutes, gentle agitation, static 5 minutes, skim static 3 minutes of back, cast.Gained cast properties: tensile strength (δ
bN/mm
2) 182.
Unit elongation (δ s%) 2.0
Hardness (HB) 67.1
Embodiment 5:
Other condition is made refining deterioration agent with the Al-Sr-RE ternary alloy that embodiment 2 makes, with ZL with embodiment 4
107Cast aluminium alloy carries out refinement and denaturation gained cast properties.
Tensile strength (δ
bN/mm
2) 253
Unit elongation (δ s%) 2.3
Hardness (HB) 104
Claims (1)
1, a kind of production technique of Al-SR-RE ternary alloy alterant is characterized in that this alterant is with SrCl
2RECl
3NaClKCl is 5: 1: 2 by weight: ionogen is made in 1 mixing, this ionogen is joined in the electrolyzer, and lead to direct current after adding the aluminium heating and melting, and feeding voltage is 6-8V, electric current 400-600A, electrolysis 4-8 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109473 CN1098446A (en) | 1993-08-03 | 1993-08-03 | Aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent and production technique thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109473 CN1098446A (en) | 1993-08-03 | 1993-08-03 | Aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent and production technique thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1098446A true CN1098446A (en) | 1995-02-08 |
Family
ID=4987635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93109473 Pending CN1098446A (en) | 1993-08-03 | 1993-08-03 | Aluminium-strontium-aluminium-strontium-rare-earth refining modifying agent and production technique thereof |
Country Status (1)
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|---|---|
| CN (1) | CN1098446A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294107A (en) * | 2014-10-29 | 2015-01-21 | 张超 | Composition for preventing aluminum alloy from causing large crystal grains |
| CN104294108A (en) * | 2014-10-29 | 2015-01-21 | 张超 | Composition for preventing aluminum alloy from causing large crystal grains and preparation method thereof |
| CN106191490A (en) * | 2016-07-04 | 2016-12-07 | 东南大学 | A kind of cast Al-Si alloy aluminum lanthanum boron strontium intermediate alloy and preparation method thereof |
| CN106676332A (en) * | 2016-10-25 | 2017-05-17 | 河北工业大学 | Aluminum alloy composite refining-modifying agent and preparing method and application thereof |
| CN113088771A (en) * | 2021-04-14 | 2021-07-09 | 广东省科学院材料与加工研究所 | Hypoeutectic Al-Si alloy and preparation method thereof |
| CN113088737A (en) * | 2021-04-14 | 2021-07-09 | 广东省科学院材料与加工研究所 | Compound alterant for deeply modifying eutectic silicon and preparation method thereof |
-
1993
- 1993-08-03 CN CN 93109473 patent/CN1098446A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294107A (en) * | 2014-10-29 | 2015-01-21 | 张超 | Composition for preventing aluminum alloy from causing large crystal grains |
| CN104294108A (en) * | 2014-10-29 | 2015-01-21 | 张超 | Composition for preventing aluminum alloy from causing large crystal grains and preparation method thereof |
| CN106191490A (en) * | 2016-07-04 | 2016-12-07 | 东南大学 | A kind of cast Al-Si alloy aluminum lanthanum boron strontium intermediate alloy and preparation method thereof |
| CN106676332A (en) * | 2016-10-25 | 2017-05-17 | 河北工业大学 | Aluminum alloy composite refining-modifying agent and preparing method and application thereof |
| CN113088771A (en) * | 2021-04-14 | 2021-07-09 | 广东省科学院材料与加工研究所 | Hypoeutectic Al-Si alloy and preparation method thereof |
| CN113088737A (en) * | 2021-04-14 | 2021-07-09 | 广东省科学院材料与加工研究所 | Compound alterant for deeply modifying eutectic silicon and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |