CN102251160A - Multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative and preparation method thereof - Google Patents
Multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative and preparation method thereof Download PDFInfo
- Publication number
- CN102251160A CN102251160A CN 201010177204 CN201010177204A CN102251160A CN 102251160 A CN102251160 A CN 102251160A CN 201010177204 CN201010177204 CN 201010177204 CN 201010177204 A CN201010177204 A CN 201010177204A CN 102251160 A CN102251160 A CN 102251160A
- Authority
- CN
- China
- Prior art keywords
- mishmetal
- magnesium
- strontium
- barium
- grain refinement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention provides a multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative which is prepared from 80-99% of magnesium, 0.5-19% of strontium (barium) and 0.5-19% of mixed rare earth, wherein at least one of strontium and barium exists; and the mixed rare earth is any self-made or commercial rare earth mixture containing two or more rare earth elements. The grain refining grain refining is prepared by a smelting method and comprises the following steps: (1) proportioning: (2) smelting and casting; (3) cold drawing or hot rolling; and (4) cutting into wires. The multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative has the characteristics of simple preparation process, favorable refining effect and low cost.
Description
Technical field
The invention belongs to magnesium and magnesium alloy field, relate to polynary compound thread grain refinement and modification agent and preparation method thereof.
Background technology
Magnesium alloy has advantages such as density is light, specific tenacity, specific rigidity height, easy recovery as one of light-alloy structure material, and its structural part is to be widely used in being described as " the green engineering material of 21 century " in the automobile industry.Magnesium and the easy alligatoring of magnesium alloy crystal grain cause mechanical property to reduce greatly.But adopt fining agent, alterant refinement magnesium alloy crystal grain, optimize alloy structure, improve mechanical characteristic, solidity to corrosion and the resistance toheat of Mg alloy castings.Metal Sr, Al-Sr master alloy are alterants commonly used in the present Mg alloy, but directly add and often have problems such as skewness, scaling loss be serious with the form of metal Sr, mostly be hypereutectic tissue in the Al-Sr master alloy and add to exist, cause and contain a large amount of thick high temperature phase Al in the alloy with the form of Al-Sr master alloy
4Sr, thereby this alloy dissolving absorbs slowly the serious and poor effect of the scaling loss of Sr; Can stop high temperature oxidation and the oxidization burning loss that reduces strontium and have in the middle of the Mg-Sr; Effectively avoid because of adding the aluminium content overproof that the Al-Sr alloy causes and introduce advantage such as other impurity, but how further to improve its rotten validity period and be the subject matter that faces at present the thinning effect of magnesium alloy.Simultaneously, according to relevant report, rare earth element is effective refinement magnesium alloy crystal grain also, but often adopt pure single rare earth element to add, because pure single rare earth element costs an arm and a leg, the cost height should be restricted.
In addition, the addition manner of traditional grain refinement and modification agent is in the magnesium alloy smelting process, add ingot casting shape (magnificent skin ingot) alterant in the liquation and carry out melting, the drawback of this addition manner is the skewness of fining modifier on the one hand, effective constituent in the fining modifier on the other hand, serious as scaling loss such as Sr, cause not good, the unstable properties of finished product thinning effect that finally obtains.
Summary of the invention
At above-mentioned deficiency, the present invention focuses on provides a kind of polynary compound thread grain refinement and modification agent that is used for magnesium and magnesium alloy and preparation method thereof.
Compound thread grain refinement and modification agent of the present invention except that containing magnesium, also comprises at least a in strontium, the barium element, and rare earth element, and its component is:
Magnesium 80～99%, strontium (barium) 0.5～19%, mishmetal 0.5～19%; Wherein, strontium, two kinds of elements of barium have a kind of existence at least;
Above-mentioned mishmetal contains rare earth element more than or equal to 2 lucium for self-control or commercially available any one.
Polynary compound thread Mg-Sr of the present invention (Ba)-mishmetal grain refinement and modification agent, the processing step of its preparation method is as follows:
(1) batching
Raw material is magnesium, strontium (barium), mishmetal, calculates and the described raw material of weighing according to the weight percentage of the described magnesium of above-mentioned prescription, strontium (barium), mishmetal;
(2) melting casting
The magnesium that step (1) is prepared places process furnace, logical rare gas element forms protective atmosphere or adds insulating covering agent, heating makes it form 650 ℃～750 ℃ molten magnesium liquid then, again with in load weighted strontium (barium), the mishmetal adding magnesium melt in the step (1) and after stirring, 650 ℃～750 ℃ insulations 0.1～2 hour, be cast into ingot casting then, be cooled to the oxide skin of removing the ingot casting surface after the room temperature, promptly obtain Mg-Sr (Ba)-mishmetal ingot casting;
Or magnesium, strontium (barium), the mishmetal that step (1) prepares placed vacuum induction melting furnace, be evacuated down to 1*10
-2Behind the Pa, be heated to 650 ℃～750 ℃, after treating all to become solution, kept power 5 to 10 minutes, casting promptly obtains Mg-Sr (Ba)-mishmetal ingot casting after static 5-10 minute;
(3) cold-drawn wire drawing or hot rolling
The ingot casting that step (2) is obtained is carrying out the hot extrusion wire drawing on the cold drawing wiredrawing bench or on the hot rolls, promptly obtains compound Mg-Sr (Ba)-mishmetal grain refinement and modification agent silk;
(4) cut into silk
Just compound thread Mg-Sr (Ba)-mishmetal grain refinement and modification agent of obtaining of step (3) cuts into the short silk of 3-10cm, promptly gets polynary compound thread Mg-Sr (Ba)-mishmetal grain refinement and modification agent finished product.
The present invention has following beneficial effect:
1, add mixed rare-earth elements, especially adopt La, Pr, the Ce mishmetal of the few Ce of the cheap relatively no Nd of cost, more more economical than single rare earth element adding in traditional master alloy, can effectively reduce production costs.
2, mishmetal and Sr and/or Ba are added simultaneously, effect and mechanical property by the polynary compound crystal grain thinning that shows, be not that they add fashionable simple linear superposition separately, but show very complicated compound action, thereby crystal grain thinning more effectively, further improve its rotten validity period.
3, the prepared fining modifier of the present invention is threadly both can add when the melting magnesium alloy, be more suitable in magnesium alloy solution-cast process, cooperate the magnesium alloy solution flow rate, add in the mode of feeding silk, interpolation speed/liquation velocity of flow the ratio that is fining modifier is added alterant, just in the mobile liquation, add alterant,, add the thread alterant of specified quantitative along with the size of liquation velocity of flow.This addition manner efficiently solves tradition to have fining modifier problem pockety in the ingot casting shape alterant addition manner, simultaneously thread block relatively easier fusion, both guaranteed that gained liquation composition was even, guaranteed the recovery rate of effective constituents such as Sr again, refinement and modification effect are better.
4, the method for the invention technology is simple, and raw material is easy to obtain, and helps equilibrium and utilize resource, reduces production costs, thereby is convenient to suitability for industrialized production.
Embodiment
Below by the embodiment behind composition and the process lowest optimization preparation method of compound thread grain refinement and modification agent of the present invention is described further.
Embodiment 1
Present embodiment is raw materials used and processing step is as follows:
Raw material is MAG block 8.91kg, strontium 30g, barium 15g, mishmetal 45g (containing 20%Ce, 80%La in the mishmetal).The MAG block that measures is put into process furnace, and feeding argon gas, flow 1.5L/min, (about 3min) is heated to 650 ℃ of formation molten magnesium liquid after waiting to feed argon gas eliminating furnace air, add load weighted strontium then, barium and mishmetal stir in molten magnesium liquid, and in 650 ℃ of insulation 0.1h, insulation finishes to come out of the stove below the back furnace cooling to 100 ℃, obtain ingot casting after the cast, remove the oxide skin on ingot casting surface, carry out the hot extrusion wire drawing then on hot rolls, re-shearing becomes the short silk of 5cm, promptly obtains the agent of compound thread 99%Mg-0.33%Sr-0.17%Ba-0.5% mishmetal grain refinement and modification.
Embodiment 2
Present embodiment is raw materials used and processing step is as follows:
Raw material is MAG block 7.2kg, strontium 1.71kg, mishmetal 90g (containing 30%Ce, 35%La, 35%Pr in the mishmetal).The MAG block, strontium and the mishmetal that measure are placed the vacuum induction process furnace, be evacuated down to 1*10
-2Behind the Pa, be heated to 700 ℃, after treating all to become solution, kept power 5 minutes, casting promptly obtains Mg-Sr (Ba)-mishmetal ingot casting after static 10 minutes; Wire drawing on cold drawing wiredrawing bench then, re-shearing become the short silk of 3cm, promptly obtain the agent of compound thread 80%Mg-19%Sr-1% mishmetal grain refinement and modification.
Embodiment 3
Present embodiment is raw materials used and processing step is as follows:
Raw material is MAG block 7.2kg, barium 90g, mishmetal 1.71kg (containing 10%Ce, 30%La, 50%Pr, 10%Nd in the mishmetal).Load weighted MAG block, barium and mishmetal are placed the vacuum induction process furnace, be evacuated down to 1*10
-2Behind the Pa, be heated to 720 ℃, after treating all to become solution, kept power 10 minutes, casting promptly obtains Mg-Sr (Ba)-mishmetal ingot casting after static 5 minutes; Wire drawing on cold drawing wiredrawing bench then, re-shearing become the short silk of 3cm, promptly obtain the agent of compound thread 80%Mg-1%Ba-19% mishmetal grain refinement and modification.
Embodiment 4
Present embodiment is raw materials used and processing step is as follows:
Raw material is MAG block 8kg, barium 500g, strontium 500g, mishmetal 1kg (containing 10%Ce, 35%La, 50%Pr, 5%Nd in the mishmetal), sodium-chlor 350g.Place process furnace to be heated to 750 ℃ the MAG block that measures and form molten magnesium liquid, add the sodium-chlor that measures, in molten magnesium liquid, add barium, strontium, the mishmetal that measures then, stir the back at 750 ℃ of insulation 0.1h, insulation finishes to come out of the stove below the back furnace cooling to 100 ℃, obtain ingot casting after the cast, remove the oxide skin on ingot casting surface, wire drawing on cold drawing wiredrawing bench then, re-shearing becomes the short silk of 4cm, promptly obtains the agent of compound thread 80%Mg-5%Ba-5%Sr-10% mishmetal grain refinement and modification.
Embodiment 5
Present embodiment is raw materials used and processing step is as follows:
Raw material is MAG block 4.5kg, barium 250g, mishmetal 250g (contain 50%Ce, 5%La, 20%Pr, 5%Nd, 10%Sm in the mishmetal, 10%Dy), sodium-chlor 200g.。Place process furnace to be heated to 700 ℃ the MAG block that measures and form molten magnesium liquid, add the sodium-chlor that measures, in molten magnesium liquid, add barium powder, the mishmetal that measures then, stir the back at 750 ℃ of insulation 1.2h, insulation finishes to come out of the stove below the back furnace cooling to 100 ℃, obtain ingot casting after the cast, remove the oxide skin on ingot casting surface, wire drawing on cold drawing wiredrawing bench then, re-shearing becomes the short silk of 10cm, promptly obtains the agent of compound thread 90%Mg-5%Ba-5% mishmetal grain refinement and modification.
Claims (3)
1. a polynary compound thread Mg-Sr (Ba)-mishmetal grain refinement and modification agent is characterized in that this polynary compound thread grain refinement and modification agent is the thread of 3-10cm, and its component is:
Magnesium 80～99%, strontium (barium) 0.5～19%, mishmetal 0.5～19%, wherein, strontium, two kinds of elements of barium have at least a kind of.
2. polynary compound thread Mg-Sr according to claim 1 (Ba)-mishmetal grain refinement and modification agent is characterized in that described mishmetal is for containing rare earth element more than or equal to 2 lucium for self-control or commercially available any one.
3. polynary compound thread Mg-Sr according to claim 1 (Ba)-mishmetal grain refinement and modification agent is characterized in that preparation method's the processing step of this polynary compound thread Mg-Sr (Ba)-mishmetal grain refinement and modification agent is as follows:
(1) batching
Raw material is magnesium, strontium (barium), mishmetal, calculates and the described raw material of weighing according to the weight percentage of the described magnesium of above-mentioned prescription, strontium (barium), mishmetal;
(2) melting casting
The magnesium that step (1) is prepared places process furnace, logical rare gas element forms protective atmosphere or adds insulating covering agent, heating makes it form 650 ℃～750 ℃ molten magnesium liquid then, again with in load weighted strontium (barium), the mishmetal adding magnesium melt in the step (1) and after stirring, 650 ℃～750 ℃ insulations 0.1～2 hour, be cast into ingot casting then, be cooled to the oxide skin of removing the ingot casting surface after the room temperature, promptly obtain Mg-Sr (Ba)-mishmetal ingot casting;
Or magnesium, strontium (barium), the mishmetal that step (1) prepares placed vacuum induction melting furnace, be evacuated down to 1
*10
-2Behind the Pa, be heated to 650 ℃～750 ℃, after treating all to become solution, kept power 5 to 10 minutes, casting promptly obtains Mg-Sr (Ba)-mishmetal ingot casting after static 5-10 minute;
(3) cold-drawn wire drawing or hot rolling
The ingot casting that step (2) is obtained is carrying out the hot extrusion wire drawing on the cold drawing wiredrawing bench or on the hot rolls, promptly obtains compound Mg-Sr (Ba)-mishmetal grain refinement and modification agent silk;
(4) cut into silk
Just compound thread Mg-Sr (Ba)-mishmetal grain refinement and modification agent of obtaining of step (3) cuts into the short silk of 3-10cm, promptly gets polynary compound thread Mg-Sr (Ba)-mishmetal grain refinement and modification agent finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010177204 CN102251160A (en) | 2010-05-19 | 2010-05-19 | Multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010177204 CN102251160A (en) | 2010-05-19 | 2010-05-19 | Multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102251160A true CN102251160A (en) | 2011-11-23 |
Family
ID=44978722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010177204 Pending CN102251160A (en) | 2010-05-19 | 2010-05-19 | Multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102251160A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137762A (en) * | 2005-03-08 | 2008-03-05 | 裵东炫 | Mg alloys containing misch metal, manufacturing method of wrought mg alloys containing misch metal, and wrought mg alloys thereby |
| CN101230433A (en) * | 2008-02-22 | 2008-07-30 | 南京信息工程大学 | Metal refiner for magnesium alloy and preparation method thereof |
-
2010
- 2010-05-19 CN CN 201010177204 patent/CN102251160A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137762A (en) * | 2005-03-08 | 2008-03-05 | 裵东炫 | Mg alloys containing misch metal, manufacturing method of wrought mg alloys containing misch metal, and wrought mg alloys thereby |
| CN101230433A (en) * | 2008-02-22 | 2008-07-30 | 南京信息工程大学 | Metal refiner for magnesium alloy and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104004949B (en) | The preparation method of a kind of high strength magnesium lithium alloy | |
| CN100467647C (en) | High-strength heat-proof compression casting magnesium alloy and preparation method thereof | |
| CN102534327B (en) | Magnesium alloy and preparation method thereof | |
| CN101775530B (en) | Hypereutectic al-si alloy piston material | |
| CN103276264B (en) | Low-cost and high-heat-strength wrought magnesium alloy and preparation method thereof | |
| EP2634278A1 (en) | Magnesium alloy having excellent ignition resistance and mechanical properties, and method for manufacturing same | |
| CN108559874B (en) | High-strength high-conductivity heat-resistant aluminum alloy conductor and preparation method thereof | |
| CN101660070B (en) | Zinc copper titanium complex alloy functional and structural material and preparation method thereof | |
| CN101265536A (en) | High-strength high-conductivity copper alloy and preparation method thereof | |
| CN104060140A (en) | High temperature oxidation resistant magnesium alloy | |
| CN103498065B (en) | A kind of TiAl alloy crystal grain refinement method | |
| CN104195385A (en) | Permanent modifier capable of improving electrical conductivity of hypo eutectic Al-Si alloy as well as preparation method and using method of permanent modifier | |
| CN102903415B (en) | A kind of special-shaped oxidation-resistant high-conductivity aluminum alloy carbon fiber lead wire and manufacture method | |
| CN103468988B (en) | Preparation method of magnesium alloy | |
| CN103882270A (en) | Aluminum alloy material for special-type high pressure oil pump cases and preparation method thereof | |
| CN103820698A (en) | Rare earth iron intermediate alloy and application thereof | |
| CN104818400A (en) | Intermediate alloy material and preparation method thereof | |
| CN103695744A (en) | Nanoparticle enhanced magnesium alloy and preparation method thereof | |
| CN103103425A (en) | Heat resisting magnesium alloy | |
| CN102839304B (en) | Aluminum alloy tube for camping tent support and preparation method thereof | |
| CN102251160A (en) | Multielement composite wirelike Mg-Sr(Ba)-mixed rare earth grain refining alterative and preparation method thereof | |
| CN101008056B (en) | Alloy material used for circuit lead frame and its manufacture method | |
| CN103526092A (en) | Novel flame-retardant deformed magnesium alloy and preparation method thereof | |
| CN104028734B (en) | The method of the low segregation of high niobium containing titanium aluminium alloy and even tissue refinement | |
| CN108172357B (en) | Microwave sintered NdFeB magnet and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111123 |