CN1370846A - Al-Pb alloy protecting and purifying flux - Google Patents
Al-Pb alloy protecting and purifying flux Download PDFInfo
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- CN1370846A CN1370846A CN 01132216 CN01132216A CN1370846A CN 1370846 A CN1370846 A CN 1370846A CN 01132216 CN01132216 CN 01132216 CN 01132216 A CN01132216 A CN 01132216A CN 1370846 A CN1370846 A CN 1370846A
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- alloy
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- protecting
- purifying
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Abstract
The Al-Pb alloy protecting and purifying flux consists of: NaCl 20-25 wt%, KCl 20-25 wt%, (La, Ce) Fe 1.5-2.5 wt%, CaCO3 5-10 wt%, Na3AlF6 10-20 wt% and Na2B4O7 30-40 wt%. The flux has the integral functions of covering, protecting, preventing oxidatino, preventing lead evaporation, eliminating hydrogen, eliminating impurities and fining crystal grain, and is non-toxic and harm-less. Using the flux can reduce hydrogen content from over 0.5 ml/100 g Al to below 0.15 ml/100 g Al, eliminate 10 microns over oxide inclusion completely, reduce 10 microns below non-metal inclusion to lower than 0.02%, and raise the tension strength, elongation and wear resistance of Al-Pb alloy.
Description
What the present invention relates to is a kind of flux, and particularly a kind of Al-Pb alloy protecting and purifying flux belong to the metallic material alloy field of smelting.
Background technology: because Al-Pb alloy has excellent abrasive and seizure resistance, and has self-lubricating function, it is that alloy is used as internal combustion engine bearings such as automobile that this kind alloy will extensively replace aluminium-Xi.Though China is in the research of this kind alloy and produce and obtained huge progress, but because Al-Pb alloy is easy to generate the shortcoming of gravity segregation, thereby in order to eliminate segregation alloy melting temp height, usually more than 1000 ℃, in its fusion process, the measure that prevents segregation such as often need to take to stir, so also exist bigger problem: (1) melt oxidation scaling loss is serious, (2) the melt fluctuation causes being involved in the alloy liquid a large amount of oxide inclusions, (3) plumbous volatilization is serious, not only cause the lead content in the alloy to reduce, and contaminate environment seriously, infringement operator's health, (4) melt generally adopts hexachloroethane to carry out purifying treatment as flux, not only can not remove hydrogen and oxide inclusion in the melt fully, and environmental pollution is serious.At present in the melting of this kind alloy and scavenging process, there are not better flux and way, by literature search, " preparation of casting sliding bearing of Al-Pb alloy alloy and microstructure thereof " literary composition in " Special Processes of Metal Castings and non-ferrous alloy ", 1998 (5): 24-26, author: Sun Daren etc., this article is presented in aluminium-lead alloy fusion process, to leave the aperture be φ 10mm seal closure to face shield one on crucible, but the φ 10mm aperture above the sealing cover, can not completely cut off melt contacts with air, can not prevent plumbous volatilization and scaling loss, and inconvenient operation.For the refining of aluminium-lead alloy, there is no and theme same document report of the present invention.
Summary of the invention and embodiment: composition formulation weight per-cent of the present invention is: NaCl 20-25%, KCl 20-25%, (La, Ce) F
31.5-2.5%, CaCO
35-10%, Na
3AlF
610-20%, Na
2B
4O
730-40%.
Al-Pb alloy melt protecting and purifying flux are added smelting furnace before charging, when furnace charge begins to melt, because the density of flux is less than alloy melt, melt spreads out the surface of alloy melt automatically, form the flux film of one deck densification, this flux film is kept perfectly under Al-Pb alloy high-temperature fusant (more than 1000 ℃) effect, thereby plays secluding air, prevents to inhale the effect of hydrogen and melt oxidation; This antiflux has physics and chemical purification effect to hydrogen and the oxygen that exists in the alloy melt, and the purified product of formation is adsorbed by flux film, and flux film is had strengthening effect; Chemical ingredients in the flux has refining effect with Pb mutually mutually to the Al in the alloy; The various reaction times that this antiflux and melt produce fully and steadily.
Following composition formulation weight per-cent according to the present invention provides three embodiment:
Implement 1:NaCl 22%, KCl 22%, (La, Ce) F
31%, CaCO
35%, Na
3AlF
620%, Na
2B
4O
730%.Can make the hydrogen content＜0.15ml/100gAl of Al-Pb alloy melt (1000 ℃), make oxide inclusion content＜0.02% in the alloy melt, the performance of Al-Pb alloy improves more than 15%; Refinement Al makes good use of mutually with Pb mutually; Plumbous scaling loss＜1%.
Implement 2:NaCl 20%, KCl 20%, (La, Ce) F
35%, CaCO
35%, Na
3AlF
610%, Na
2B
4O
740%.Can make the hydrogen content＜0.14ml/100gAl of Al-Pb alloy melt (1000 ℃), make oxide inclusion content＜0.02% in the alloy melt, the performance of Al-Pb alloy improves more than 20%; Refinement Al acts on better mutually with Pb mutually; Plumbous scaling loss＜1%.
Implement 3:NaCl 20%, KCl 20%, (La, Ce) F
38%, CaCO
32%, Na
3AlF
615%, Na
2B
4O
735%.Can make the hydrogen content＜0.10ml/100gAl of Al-Pb alloy melt (1000 ℃), make oxide inclusion content＜0.02% in the alloy melt; The performance of Al-Pb alloy improves more than 25%; Refinement Al acts on best with Pb mutually mutually; Plumbous scaling loss＜1%.
The present invention has substantive distinguishing features and marked improvement, can collect the anti-oxidation of covering protection, prevent plumbous volatilization and remove The oxygen removal of impurities reach high level and crystal grain thinning multi-functional in one, and nontoxic. Need not any other measure Condition under, when adopting this flux can make aluminium Pb alloy melt high temperature (1000 ℃) hydrogen content from＞0.5ml/100gAl drops to below the 0.15ml/100gAl. Adopt this flux can remove 10 μ m in the melt fully The content of above oxide inclusion, and the following nonmetal inclusion content of 10 μ m is lower than 0.02%. Adopt this molten Agent can make tensile strength, percentage elongation and the anti-wear performance of aluminium Pb alloy obviously improve. Adopt this flux can play carefully Change Al phase and Pb effect mutually. Adopt this flux can make volatilization and the scaling loss amount of alloy melt lead in fusion process Drop to＜1% level. Only must before reinforced, add this flux, automatic covering protection in the alloy melting process, Technology is simple.
Claims (1)
1, a kind of Al-Pb alloy melt protecting and purifying flux is characterized in that composition formulation weight per-cent is: NaCl 20-25%, KCl 20-25%, (La, Ce) F
31.5-2.5%, CaCO
35-10%, Na
3AlF
610-20%, Na
2B
4O
730-40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011322160A CN1176236C (en) | 2001-11-15 | 2001-11-15 | Al-Pb alloy protecting and purifying flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011322160A CN1176236C (en) | 2001-11-15 | 2001-11-15 | Al-Pb alloy protecting and purifying flux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1370846A true CN1370846A (en) | 2002-09-25 |
| CN1176236C CN1176236C (en) | 2004-11-17 |
Family
ID=4671254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011322160A Expired - Fee Related CN1176236C (en) | 2001-11-15 | 2001-11-15 | Al-Pb alloy protecting and purifying flux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1176236C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250636B (en) * | 2008-03-27 | 2010-06-02 | 武汉英立科技研究所 | Nonferrous alloy smelting fusing agent and preparation method |
| CN105316508A (en) * | 2015-10-21 | 2016-02-10 | 广西平果铝合金精密铸件有限公司 | Aluminum alloy refining agent containing Ce, La and Er |
| CN109252073A (en) * | 2018-11-13 | 2019-01-22 | 天津立中合金集团有限公司 | High-strength tenacity aluminium alloy space material and preparation method thereof |
-
2001
- 2001-11-15 CN CNB011322160A patent/CN1176236C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250636B (en) * | 2008-03-27 | 2010-06-02 | 武汉英立科技研究所 | Nonferrous alloy smelting fusing agent and preparation method |
| CN105316508A (en) * | 2015-10-21 | 2016-02-10 | 广西平果铝合金精密铸件有限公司 | Aluminum alloy refining agent containing Ce, La and Er |
| CN105316508B (en) * | 2015-10-21 | 2018-07-27 | 广西平果铝合金精密铸件有限公司 | A kind of aluminum refining agent of the erbium of lanthanum containing cerium |
| CN109252073A (en) * | 2018-11-13 | 2019-01-22 | 天津立中合金集团有限公司 | High-strength tenacity aluminium alloy space material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1176236C (en) | 2004-11-17 |
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