CN101289721A - High manganese-containing magnesium-manganese intermediate alloy and preparation - Google Patents
High manganese-containing magnesium-manganese intermediate alloy and preparation Download PDFInfo
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- CN101289721A CN101289721A CNA2008100698427A CN200810069842A CN101289721A CN 101289721 A CN101289721 A CN 101289721A CN A2008100698427 A CNA2008100698427 A CN A2008100698427A CN 200810069842 A CN200810069842 A CN 200810069842A CN 101289721 A CN101289721 A CN 101289721A
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Abstract
The invention relates to a magnesium-manganese intermediate alloy with high-manganese content and a method for making the same. The composition of the alloy in percentage by weight is: 8 to 12 percent of manganese metal powder and the balance being magnesium. The alloy is made by smelting in an electromagnetic induction furnace and adopting a stirring casting method. Argon shield is adopted in smelting and casting processes. The smelting temperature is between 700 and 800 DEG C, and the casting temperature is room temperature. The magnesium-manganese intermediate alloy can be used to manufacture various magnesium alloys which are widely used at present or the novel magnesium alloy with high-manganese content. The magnesium-manganese intermediate alloy can be used to smelt the novel magnesium alloy products with excellent corrosion resistance and weldability. The magnesium-manganese intermediate alloy of the invention is simple in production process, needs no special equipment, and has the advantage of low production cost.
Description
Technical field
The present invention relates to a kind of preparation method of metallic substance, particularly a kind of magnesium-manganese master alloy and preparation method of high manganese content.
Background technology
Magnesium alloy is a structured material the lightest in the practical application, and its density has only 2/3 of aluminium, 1/5 of steel.Its specific tenacity, specific rigidity all can reach or be better than steel and aluminium alloy.Magnesium alloy also has characteristics such as good thermal conductivity, electromagnetic wave shielding, freedom from vibration; Magnesium alloy is to the environment nontoxic pollution-free, and the cost of recycling is low; And magnesium reserves are extremely abundant on earth, account for 2.7% of earth crustal mass, the mass content of magnesium reaches 0.13% in the seawater.Therefore magnesium alloy is regarded as the following novel material that substitutes traditional metal materials, and more and more is subjected to the attention of countries in the world.China is the abundantest country of magnesium resource in the world, also is the producing country and the export State of magnesium and magnesium alloy maximum, and the development research of magnesium alloy has special significance to China.Common magnesium alloy is mainly Mg-Al system, Mg-Zn system, Mg-Mn system, Mg-Ca system, Mg-Si system, Mg-RE system etc. at present.
The magnesium Mn series alloy belongs to wrought magnesium alloys, and good corrosion stability and weldability are arranged, and particularly seawater corrosion resistance speed reduces greatly, has been widely used in aircraft skin, wallboard and internals, die forging complex component, oil piping system tubing against corrosion etc.M1A trade mark wrought magnesium alloys by U.S. ASTM standard production contains manganese 1.2% at present, and the MB1 of Chinese YB standard production and MB8 trade mark wrought magnesium alloys contain manganese and be respectively 1.3～2.5% and 1.5～2.5%.Because manganiferous magnesium alloy has good punching press, extruding and rolling technology performance, and stress corrosion inclination is little, higher mechanical property (tensile strength 250MPa, unit elongation 18%) and high-temperature behavior (250 ℃ of following tensile strength 120MPa) are arranged, so extremely people like after the distortion.
In the smelting process of magnesium alloy, often need to add the magnesium-manganese master alloy, be used for adding manganese element to alloy, change the manganese content of magnesium alloy.The magnesium-manganese master alloy preparation method of industrial application is at present: add a small amount of flux, pack into then magnesium ingot and ground flux in the plumbago crucible of heating; Criticize and add fusion and be superheated in 880～950 ℃ the magnesium beating broken manganese mark in advance, each adding all needs to stir metal melt, under 750 ℃ the temperature alloy is poured into ingot mould and solidifies being not less than at last.The shortcoming of this method is: (1) working temperature is up to 900 ℃, and magnesium very easily burns even explodes; (2) manganese solubleness in magnesium is low, and under 652 ℃ of peritectic temperatures, the solubleness of manganese only is 3.4%, and along with temperature descends, manganese solubleness in magnesium sharply reduces, and is difficult to prepare the magnesium manganese master alloy of high manganese content.Because, need to develop the magnesium-manganese master alloy of the high manganese content that is used for high-strength deforming magnesium alloy and corrosion-resistant magnesium alloy in the market urgently, therefore, research magnesium-manganese master alloy fabricating technology and final alloy structure, Effect on Performance rule day shown important.
Summary of the invention
The magnesium-manganese master alloy and the preparation method that the purpose of this invention is to provide a kind of high manganese content.Adopt the magnesium-manganese master alloy of the present invention's preparation, can be used for the manufacturing of ordinary magnesium alloy, also can be used for having high anti-corrosion, the manufacturing of the novel magnesium alloy of high weldability.The method for adjusting compositions of alloy of the present invention is easy, has production technique simple, the advantage that cost is low.
Technical scheme of the present invention is:
The magnesium-manganese master alloy of high manganese content is characterized in that this magnesium alloy is made up of manganese, magnesium, and its each constituent mass percentage composition is
Manganese: 8～12%; All the other are magnesium.
Wherein, manganese adds in the magnesium in the mode of metal-powder, and manganese content is 99% in the metal-powder; Adjust the add-on of manganese powder according to the magnesium-manganese master alloy ratio requirement of high manganese content.
Manganese content is 99% manganese powder, and Mg content is that 99% pure magnesium all adopts commercially available conventional products.
Prepare the method for the magnesium-manganese master alloy of high manganese content, following steps arranged:
A. get manganese powder and screen by 100 orders and 220 purpose screen clothes respectively, leave and take particle diameter, do the manganese powder of next step employing at 100～220 purpose manganese powders.
B. get the manganese powder of pure magnesium and steps A gained according to the described mass percent of claim 1, mix, put into plumbago crucible, do protective atmosphere with argon gas, temperature is 700～800 ℃, fusing in electromagnetic induction furnace, stirring.And normal temperature is cast in the copper mold under the situation of argon shield is arranged, and obtains the magnesium-manganese master alloy strand of high manganese content.
The present invention screens manganese powder, gets particle diameter at 100～220 order manganese powder particles, under induction stirring, the manganese powder uniform particles is scattered in the liquid magnesium.Behind rapid solidification, the manganese powder particle has little time the sedimentation segregation and just has been cemented in the metal magnesium ingot, has guaranteed the homogeneity of alloying constituent.
The invention has the beneficial effects as follows:
1. broken through the interior manganese content of existing magnesium-manganese master alloy and be no more than 3.4% the limit, manganese content reaches 8%～12% or higher.The method for adjusting compositions of master alloy is simple, and the manganese powder quality that only need change input gets final product.
2. during with the magnesium-manganese master alloy melting ordinary magnesium alloy among the present invention, the usage quantity of master alloy has only 1/3-1/4, has improved the service efficiency of master alloy in the past.For melting manganese content surpasses 5% the good magnesium alloy of novel corrosion resistant, welding property, provide the master alloy that can guarantee described performance.
3. use melting magnesium-manganese master alloy of the present invention, working temperature is lower more than 100 ℃ than traditional method, operation still less, the time is shorter, saved the energy with manually, have tangible cost advantage.
4. the present invention also finds a new outlet for the deep development utilization of China's manganese resource.
The magnesium-manganese master alloy of the high manganese content that employing the inventive method obtains, its manganese content can be used for the metallic substance of melting ordinary magnesium alloy and high anti-corrosion high welding performance magnesium alloy in 8～12% (mass percents).The inventive method does not need special equipment, has further simplified production technique, has reduced production cost.
Description of drawings
The magnesium-manganese master alloy metallographic structure figure of Fig. 1 manganese content 10%;
The magnesium-manganese master alloy metallographic structure figure of Fig. 2 manganese content 12%.
Embodiment
Master alloy of the present invention is made up of manganese metal powder, magnesium, and its each constituent mass percentage composition is manganese: 8～12%; All the other are magnesium.
The preparation method:
1. get manganese powder and screen with 100 purpose screen clothes earlier, the powder by 100 eye mesh screens screens with 220 purpose screen clothes again.Get the powder that does not pass through 220 eye mesh screens, as manganese powder.
2. get pure magnesium according to above-mentioned mass percent, put into plumbago crucible, get metal magnesium powder according to above-mentioned mass percent, wherein metal magnesium powder adopts the manganese powder of preparation method's step 1 gained, is sprinkling upon the MAG block top.Plumbago crucible is put into electromagnetic induction furnace be heated to 700～800 ℃, and feed argon shield.Magnesium melted the back induction stirring 2～6 minutes, poured into the normal temperature copper mold under the argon shield having, and solidified the back and took out ingot casting and be high manganese content magnesium-manganese master alloy.
Embodiment 1
Get pure magnesium 115 grams, manganese powder 11 grams, high manganese content magnesium-manganese master alloy is made in melting according to the method described above.The magnesium-manganese master alloy ingot casting of the high manganese content of gained, Fig. 1 is seen in metallographic structure.Evenly get 5 point samplings along ingot casting longitudinal section diagonal lines,, obtain the magnesium-manganese master alloy that average Mn content is the high manganese content of 10.8% (mass percent) according to GB/T 1506-2002 chemical examination.
Embodiment 2
Get pure magnesium 120 grams, manganese powder 13.7 grams, high manganese content magnesium-manganese master alloy is made in melting according to the method described above.The magnesium-manganese master alloy ingot casting of the high manganese content of gained, Fig. 2 is seen in metallographic structure.Evenly get 5 point samplings along ingot casting longitudinal section diagonal lines, according to GB/T 1506-2002 chemical examination, the magnesium-manganese master alloy of the high manganese content that to obtain average Mn content be 12.2% (mass percent).
Conclusion:
According to the described method of patent of the present invention, can make the high manganese content magnesium manganese master alloy of Mn content in 8～12% (mass percents).This method is simple to operate, and the raw material of use and equipment are the common product in market, has with low costly, is fit to the characteristics of large-scale industrial production.
Claims (2)
1. the magnesium-manganese master alloy of a high manganese content is characterized in that described master alloy is made up of manganese metal powder, magnesium, and its each constituent mass percentage composition is
Manganese: 8～12%;
All the other are magnesium.
2. prepare the method for the magnesium-manganese master alloy of right 1 described high manganese content, it is characterized in that following steps are arranged:
A. get manganese powder respectively by 100 eye mesh screens screenings, the powder by 100 eye mesh screens is got the manganese powder that does not pass through 220 eye mesh screens again with the screening of 220 purpose screen clothes, does the manganese powder of next step employing;
B. get the manganese powder of pure magnesium and steps A gained according to the described mass percent of claim 1, mix, put into container, do protective atmosphere with argon gas, temperature is 700～800 ℃, fusing in the electromagnetic induction furnace, stirring; Argon gas is done normal temperature cast under the protective atmosphere condition, promptly gets the magnesium-manganese master alloy strand of high manganese content of the present invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100698427A CN101289721B (en) | 2008-06-18 | 2008-06-18 | High manganese-containing magnesium-manganese intermediate alloy and preparation |
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| CN2008100698427A CN101289721B (en) | 2008-06-18 | 2008-06-18 | High manganese-containing magnesium-manganese intermediate alloy and preparation |
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| CN101289721A true CN101289721A (en) | 2008-10-22 |
| CN101289721B CN101289721B (en) | 2010-11-03 |
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| CN2008100698427A Expired - Fee Related CN101289721B (en) | 2008-06-18 | 2008-06-18 | High manganese-containing magnesium-manganese intermediate alloy and preparation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517457A (en) * | 2011-12-30 | 2012-06-27 | 中原工学院 | Method utilizing graphite-clay crucible to smelt magnesium or magnesium alloy |
| CN102517456A (en) * | 2011-12-30 | 2012-06-27 | 中原工学院 | Method utilizing graphite-clay crucible to smelt magnesium or magnesium alloy |
| CN105002409A (en) * | 2015-07-17 | 2015-10-28 | 济南大学 | Mg-Mn intermediate alloy and preparation method thereof |
| CN106834805A (en) * | 2016-12-21 | 2017-06-13 | 广西大学 | A kind of method for preparing zinc-manganese intermediate alloy |
| CN107326202A (en) * | 2017-07-10 | 2017-11-07 | 周云锋 | A kind of high Mn content magnesium manganese intermediate alloy preparation method and alloy product |
| CN107746981A (en) * | 2017-10-18 | 2018-03-02 | 河北四通新型金属材料股份有限公司 | A kind of preparation method of magnesium manganese intermediate alloy |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1238544C (en) * | 2003-06-17 | 2006-01-25 | 沈阳工业大学 | Magnesium-manganese intermediate alloy and preparing method thereof |
-
2008
- 2008-06-18 CN CN2008100698427A patent/CN101289721B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517457A (en) * | 2011-12-30 | 2012-06-27 | 中原工学院 | Method utilizing graphite-clay crucible to smelt magnesium or magnesium alloy |
| CN102517456A (en) * | 2011-12-30 | 2012-06-27 | 中原工学院 | Method utilizing graphite-clay crucible to smelt magnesium or magnesium alloy |
| CN102517456B (en) * | 2011-12-30 | 2013-12-11 | 中原工学院 | Method utilizing graphite-clay crucible to smelt magnesium or magnesium alloy |
| CN102517457B (en) * | 2011-12-30 | 2013-12-11 | 中原工学院 | Method for utilizing graphite-clay crucible to smelt magnesium or magnesium alloy |
| CN105002409A (en) * | 2015-07-17 | 2015-10-28 | 济南大学 | Mg-Mn intermediate alloy and preparation method thereof |
| CN105002409B (en) * | 2015-07-17 | 2017-12-12 | 济南大学 | A kind of Mg Mn intermediate alloys and preparation method thereof |
| CN106834805A (en) * | 2016-12-21 | 2017-06-13 | 广西大学 | A kind of method for preparing zinc-manganese intermediate alloy |
| CN107326202A (en) * | 2017-07-10 | 2017-11-07 | 周云锋 | A kind of high Mn content magnesium manganese intermediate alloy preparation method and alloy product |
| CN107326202B (en) * | 2017-07-10 | 2019-04-05 | 周云锋 | A kind of high Mn content magnesium manganese intermediate alloy preparation method and alloy product |
| CN107746981A (en) * | 2017-10-18 | 2018-03-02 | 河北四通新型金属材料股份有限公司 | A kind of preparation method of magnesium manganese intermediate alloy |
| CN107746981B (en) * | 2017-10-18 | 2020-02-07 | 河北四通新型金属材料股份有限公司 | Preparation method of magnesium-manganese intermediate alloy |
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| CN101289721B (en) | 2010-11-03 |
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