CN1039622A - Aluminium-titanium-boron-rare earth intermediate alloy and melting method - Google Patents
Aluminium-titanium-boron-rare earth intermediate alloy and melting method Download PDFInfo
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- CN1039622A CN1039622A CN 88104205 CN88104205A CN1039622A CN 1039622 A CN1039622 A CN 1039622A CN 88104205 CN88104205 CN 88104205 CN 88104205 A CN88104205 A CN 88104205A CN 1039622 A CN1039622 A CN 1039622A
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- aluminium
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Abstract
A kind of aluminium-titanium-boron-rare earth intermediate alloy and molten system method, principal character is to contain elements such as rare earth, aluminium, titanium, boron, this alloy can make rotten, the refinement of Al-Si alloy and dehydrogenation three process are integrated, production technique is simplified greatly, shorten the production cycle, and improve the mechanical property of Al-Si alloy effectively.
Description
The present invention relates to a kind of is purpose aluminium-titanium-boron-rare earth intermediate alloy and melting method to reach rotten to the aluminum silicon alloy refinement.
In existing patent documentation, about the characteristic of the titanium that plays the crystal grain refining effect and boron and with these elements with the method that the master alloy form adds, report was once arranged, as 932, No. 575 patents of French Patent.But produce quite difficulty of aluminium-titanium-boron master alloy, so the result that crystal grain thinning draws is also different and different with the method for founding master alloy.
The method of introducing in 2,133, No. 439 patents of France is that a kind of molten titanium is contacted under the high temperature more than 1000 ℃ with the mixture of aluminium with another kind of fusion boron with the mixture of aluminium, mixes, and the result generates the TiB2 of insolubility in aluminium.In addition, for preventing to reduce the thinning effect of master alloy, so cooling fast owing to the TiB2 crystal growth.Therefore, the mixing of two kinds of above-mentioned molten masses must be carried out simultaneously with cooling, just needs the equipment of high price, and will guarantee also that on method each capacity is little to mixing and cooling off like this, so that operation.
The another kind of method of introducing in France's 1,267,974 patents is: with molten aluminum the borate of titanium fluoride hydrochlorate and sodium is reduced, and with this master alloy melt of producing, but because the large usage quantity of titanium fluoride hydrochlorate, and its price is higher, has so just improved cost.
Above-mentioned aluminium-titanium-boron master alloy only can carry out thinning processing to the aluminum silicon alloy tissue, make the crystal grain of alloy become tiny, evenly but it can not also need increase by one the treatment process that goes bad to Eutectic Silicon in Al-Si Cast Alloys processings of go bad mutually in therefore producing, make the treatment process more complicated, the production cycle lengthening.
In recent years along with rare earth to aluminum silicon alloy rotten and dehydrogenation Research on effect, it is found that rare earth element can not only go bad to aluminum silicon alloy effectively but also have stronger dehydrogenation to degas the effect of purification alloy liquid.The R.Sharan of India has studied the useful effect of mishmetal as Al-Si alloy inoculant alloy element in the article that is entitled as " rare earth metal is as aluminum-silicon alloy alterative " that " Lnt.Cast metals " 1978.No1.29-33 delivers.
The objective of the invention is aluminum silicon alloy is carried out simultaneously effective refinement and the rotten starting point that is treated to, create the manufacturing process of a kind of aluminium-titanium-boron-rare earth intermediate alloy and this master alloy, this alloy has good result of use, can improve the mechanical property of Al-Si alloy significantly, and simplify treatment process widely.
Master alloy of the present invention calculates with weight ratio; Contain B0.2～0.8%, (Ti-2.2B) 3.8～5.0%, R
E2-10%.All the other are aluminium.The manufacture method of aluminium-titanium-boron-rare earth intermediate alloy can be divided into following several stages:
(1) is dissolved in molten cryolitic (AlF
3Titanium oxide 3NaF) under the effect of melt aluminium, generates Ti.
(a) be ready to temperature at the melt aluminium more than 1000-1200 ℃, and the mixture of cryolite powder and titanium dioxide, in the mixture, the titanium dioxide weight ratio is 45-60%;
(b) above-mentioned sodium aluminum fluoride and titanium dioxide blends are added in the molten aluminum, and thorough mixing, contact all plays a role raw material.
(2) after being cooled to 750-800 ℃, above-mentioned melt adds potassium fluoborate
(a) be cooled to 700-800 ℃ after, skim;
(b) add potassium fluoborate and stirring, mix that it is fully contacted with alloy liquid.
(3) add mishmetal
(a) after above-mentioned reaction finishes, skim;
(b) add mishmetal and agitation as appropriate
(4) quick Quench gets master alloy.
Al, TiO
2, KBF
4Preferably to make master alloy satisfy following condition with the selection of the weight ratio of mishmetal, promptly contain Ti and B and rare earth in the alloy and be
0.2%≤B≤0.8%(weight ratio)
3.8%≤(Ti-2.2B)≤5.0%(weight ratio)
2%≤RE≤10%(weight ratio)
B was less than 0.2% o'clock, and the thinning effect of master alloy reduces, when B greater than 0.8% the time, effect does not increase, cost improves.
The content standard of decision titanium is: not with boron bonded titanium amount hour, the effect of master alloy enlarges markedly.Should not be present in the alloy with the aluminide form of titanium, close rare add-on and promptly will consider its modification effect, will consider itself and titanium, the ratio of boron yet with boron bonded titanium.
The Al-Ti-B-RE master alloy can make rotten to Al-Si, and refinement and dehydrogenation three process integrate, and production technique is simplified greatly, shortened the production cycle, in the refinement and rotten fully of Al-Si alloy, hydrogen content is reduced widely, improve the mechanical property of Al-Si alloy effectively.
Embodiment:
Aluminium is heated to 1100 ℃, the mixture that adds sodium aluminum fluoride and titanium dioxide, finish and skim back adding potassium fluoborate and rich La mishmetal in above-mentioned reaction, make the weight ratio of aluminium, titanium oxide, potassium fluoborate and mishmetal be equal to or greater than titaniferous in the master alloy, the weight ratio of boron and mishmetal.The composition that obtains master alloy at last is 0.49%B, (Ti-2.2B 〉=3.8%) RE9.5%.
Claims (2)
1, a kind of aluminium-titanium-boron-rare earth intermediate alloy, the weight ratio that it is characterized in that B is 0.2%-0.8%, and weight ratio (Ti-2.2B) is 3.8-5.0%, and the weight ratio of RE is 2-10%, and all the other are aluminium.
2, the manufacture method of the described master alloy of claim 1 is characterized in that being undertaken by following step:
A. with content of titanium dioxide be the mixture of the cryolite powder of 40-60% and titanium dioxide to join temperature be in 1000-1200 ℃ the melt aluminium, and make its thorough mixing, contact.
B. skim, add potassium fluoborate and stirring after above-mentioned melt being cooled to 700-800 ℃.
C. after above-mentioned reaction finishes, skim, add mishmetal.
D. quick Quench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104205 CN1039622A (en) | 1988-07-05 | 1988-07-05 | Aluminium-titanium-boron-rare earth intermediate alloy and melting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104205 CN1039622A (en) | 1988-07-05 | 1988-07-05 | Aluminium-titanium-boron-rare earth intermediate alloy and melting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1039622A true CN1039622A (en) | 1990-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88104205 Pending CN1039622A (en) | 1988-07-05 | 1988-07-05 | Aluminium-titanium-boron-rare earth intermediate alloy and melting method |
Country Status (1)
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| CN (1) | CN1039622A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946938A (en) * | 2015-07-08 | 2015-09-30 | 济南大学 | Preparation method of Al-Ti-B-Y intermediate alloy and application thereof |
| CN106048273A (en) * | 2016-07-04 | 2016-10-26 | 东南大学 | Aluminum silicon lanthanum boron quaternary intermediate alloy and preparing method thereof |
| CN107326228A (en) * | 2017-06-23 | 2017-11-07 | 兰州理工大学 | A kind of composite inoculating transcocrystallized Al-Si alloy and preparation method thereof |
| CN108103363A (en) * | 2017-12-11 | 2018-06-01 | 南昌大学 | It is a kind of for refinement-alterant of hypoeutectic silumin alloy and its preparation method and application |
-
1988
- 1988-07-05 CN CN 88104205 patent/CN1039622A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946938A (en) * | 2015-07-08 | 2015-09-30 | 济南大学 | Preparation method of Al-Ti-B-Y intermediate alloy and application thereof |
| CN106048273A (en) * | 2016-07-04 | 2016-10-26 | 东南大学 | Aluminum silicon lanthanum boron quaternary intermediate alloy and preparing method thereof |
| CN106048273B (en) * | 2016-07-04 | 2018-09-21 | 东南大学 | A kind of aluminium silicon lanthanum boron quaternary intermediate alloy and preparation method thereof |
| CN107326228A (en) * | 2017-06-23 | 2017-11-07 | 兰州理工大学 | A kind of composite inoculating transcocrystallized Al-Si alloy and preparation method thereof |
| CN107326228B (en) * | 2017-06-23 | 2019-09-10 | 兰州理工大学 | A kind of composite inoculating transcocrystallized Al-Si alloy and preparation method thereof |
| CN108103363A (en) * | 2017-12-11 | 2018-06-01 | 南昌大学 | It is a kind of for refinement-alterant of hypoeutectic silumin alloy and its preparation method and application |
| CN108103363B (en) * | 2017-12-11 | 2019-10-29 | 南昌大学 | A kind of refinement-alterant and its preparation method and application for hypoeutectic silumin alloy |
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