CN101130841A - Titanium rare-earth magnesium alloy - Google Patents
Titanium rare-earth magnesium alloy Download PDFInfo
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- CN101130841A CN101130841A CNA2007101574215A CN200710157421A CN101130841A CN 101130841 A CN101130841 A CN 101130841A CN A2007101574215 A CNA2007101574215 A CN A2007101574215A CN 200710157421 A CN200710157421 A CN 200710157421A CN 101130841 A CN101130841 A CN 101130841A
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Abstract
The present invention provides a titanium rare earth magnesium alloy and its preparation method. The composition of said titanium rare earth magnesium alloy includes (by wt%) 1.0%-9.0% of aluminium, 1.0%-6.0% of zinc, 0.2%-3.0% of silicone, 0.5%-7.0% of manganese, 0.01%-15.0% of rare earth, 0.01%-3.0% of titanium, 0.0%-2.0% of zirconium and the rest is magnesium. Said titanium rare earth magnesium alloy has high strength, high toughness and good processability.
Description
Technical field
A kind of magnesium alloy particularly possesses good corrosion stability, high strength, high tenacity, titanium rare-earth magnesium alloy and preparation method thereof that contains against corrosion of excellent machinability.
Background technology
The density of magnesium alloy is 23% of steel, 67% of aluminium, 170% of plastics, be metal the lightest in the structural metallic materials, the yield strength and the aluminium alloy of magnesium alloy are about the same, only are lower than carbon steel slightly, be plastics 4-5 doubly, its Young's modulus is farther far above plastics, is its more than 20 times, therefore under identical strength and stiffness situation, do structural part with magnesium alloy and can alleviate pts wt greatly, this the point to aircraft industry, automotive industry, portable electronic equipment all has very important significance.But the chemically reactive of magnesium is very strong, and oxidation easily in air particularly at high temperature, if the oxidizing reaction liberated heat can not in time be dispersed, then causes burning easily, therefore will take the measure of anti-oxidation when the fusing magnesium alloy.The oxide film specific volume of magnesium is less than matrix metal, so loose porous, it is solid spacious close to can not show a candle to the aluminum alloy surface oxide film, does not have obvious provide protection.The electropotential of magnesium is very low, and electrochemical order occupies last position in common metal, so the corrosion stability of magnesium is relatively poor.Corrosion easily in moist atmosphere, fresh water, seawater and most of acid, salts solution, so in the production of magnesium alloy, processing, storage and between the usage period, suitable safeguard procedures should be taked in the surface, magnesium alloy easily causes crevice corrosion with other metallic contact the time; And conventional magnesium alloy plasticity is poor, and extrusion temperature is low, and therefore, the extruding difficulty is just bigger.So magnesium alloy is badly in need of improving erosion resistance, high temperature resistance.Possesses good processing properties simultaneously.Develop at existing problem in the prior art that a kind of against corrosion to contain titanium rare-earth magnesium alloy very necessary.
Summary of the invention
In view of existing problem in the above-mentioned prior art.The purpose of this invention is to provide a kind of titanium rare-earth magnesium alloy, this magnesium alloy has possessed good corrosion stability, high strength, high tenacity, plasticity preferably, good processing properties.Can realize extrusion molding; The invention provides a kind of preparation method who prepares titanium rare-earth magnesium alloy simultaneously, this method can make other metals such as rare earth, titanium and magnesium better fuse.
A kind of titanium rare-earth magnesium alloy, form the basic alloy composition by magnesium, rare earth, titanium etc., the weight percent of its contained component consists of: aluminium 1.0%--9.0%, zinc 1.0%--5.0%, silicon 0.2%--3.0%, manganese 0.5%--7.0%, rare earth 0.01%--15.0%, titanium 0.01%--3.0%, zirconium 0.0%--2.0%, the magnesium surplus, magnesium is between 80%--115%.
Rare earth of the present invention comprises one or more in lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, the scandium.
Can contain three kinds of compositions simultaneously in the basic alloy composition of the present invention, zinc, silicon, manganese also can only contain wherein any one.
A kind of its preparation method of titanium rare-earth magnesium alloy, preparation method's processing step is:
1. in advance according to the weight hundred of contained component than being grouped into, with aluminium, zinc, silicon, manganese, rare earth, titanium, zirconium synthetic mesophase alloy;
2. the weight percent by contained component takes by weighing pure magnesium and master alloy;
3. earlier pure magnesium is put into crucible, be warming up between 600-800 ℃, when heating up and feed shielding gas, shielding gas is rare gas element or sulfur hexafluoride, melts fully until magnesium ingot by heating;
4. after treating that master alloy melts fully, can be by die casting, casting, technological formings such as extruding.Promptly obtain titanium rare-earth magnesium alloy of the present invention.
Described titanium rare-earth magnesium alloy and the contrast of conventional magnesium alloy data see the following form:
| Not rotten | Unite rotten the processing | ||
| The as-cast structure performance | Matrix grain | ＞100μm | ≤50μm |
| The magnalium phase morphology | Thick, nettedly distribute along crystal boundary | Disperse distributes ,≤20 μ m | |
| Rare earth, titanium phase morphology | Needle-like | Vermiform | |
| σb(MPa) | 160 | ≥190 | |
| σ0.2(MPa) | 80 | ≥90 | |
| 6(％) | 4 | ≥10 |
Titanium rare-earth magnesium alloy of the present invention has following characteristics:
1, emphasis of the present invention is to break through the chemical ingredients that traditional magnesium alloy trade mark uses, and adds rare earth, titanium iso-metamorphism element, and alloying constituent is optimized design, and (crystal grain thinning makes simultaneously to being out of shape unfavorable β-Mg improving alloy structure
17Al
12The particulate state that is become tiny disperse by thick successive net distribution distributes, and even nodularization.), improve alloy plastic deformation's ability, yield strength, room temperature toughness, flame retardant resistance, high thermal resistance and corrosion proof while, but the casting technological parameter operating restraint is enlarged.The developing Application of Magnesium is necessary.
2, the invention provides a kind of titanium rare-earth magnesium alloy, this magnesium alloy has possessed good corrosion stability, high strength, high tenacity, plasticity preferably, good processing properties.Can realize extrusion molding;
3, a kind of preparation method who prepares titanium rare-earth magnesium alloy provided by the present invention, this method can make other metals such as rare earth, titanium and magnesium better fuse.
4, add effective partition ratio that rare earth can increase magnesium, make grain refining simultaneously, thus, can suppress the formation of segregation.Also can change the structure and properties of Mg alloy surface oxide film, make the Mg-Re-Ti alloy have better painted anodizing performance, also improve the corrosion resistance nature of Mg-Re-Ti alloy; Along with the gaining in strength in right amount of titanium amount, corrosion resisting property also improve thereupon.
5, magnesium alloy of the present invention is compared with conventional magnesium alloy and has been improved plastic deformation ability, yield strength, room temperature toughness, flame retardant resistance, high thermal resistance and corrosion proof while, but the casting technological parameter operating restraint is enlarged.
Embodiment
Embodiment one: prepare the 100kg titanium rare-earth magnesium alloy by following proportioning, need weigh up each element and be: the magnesium (Mg) of 6 kilograms in aluminium (Al), 2 kilograms on zinc (Zn), 0.8 kilogram of zirconium (Zr), 2 kilograms of neodymiums (Nb), 0.2 kilogram of titanium (Ti) and surplus.
The preparation method comprises in advance 6 kilograms in aluminium (Al), 2 kilograms on zinc (Zn), 0.8 kilogram of zirconium (Zr), 2 kilograms of neodymiums (Nb), 0.2 kilogram of melting synthetic mesophase of titanium (Ti) alloy standby.By the weight hundred of contained component than taking by weighing pure magnesium and master alloy; Earlier pure magnesium is put into crucible, heat up heating and feeding shielding gas melt fully until magnesium ingot, add master alloy then and feed shielding gas; After treating that master alloy melts fully, can be by die casting, casting, technological formings such as extruding.Promptly obtain titanium rare-earth magnesium alloy of the present invention.
Utilize X diffraction and TEM that this titanium rare-earth magnesium alloy has been carried out the metallographic compositional analysis.This strength of alloy is 276MPa, and yield strength is 196MPa, and elongation is 12%.
Embodiment two: prepare the 100kg titanium rare-earth magnesium alloy by following proportioning, need weigh up each element and be: the magnesium (Mg) of 7 kilograms in aluminium (Al), 1.5 kilograms in manganese (Mn), 0.8 kilogram of zirconium (Zr), 4 kilograms of yttriums (Y), 0.5 kilogram of titanium (Ti) and surplus.
The preparation method comprise in advance will: 7 kilograms in aluminium (Al), 1.5 kilograms in manganese (Mn), 0.8 kilogram of zirconium (Zr), 4 kilograms of yttriums (Y), 0.5 kilogram of melting synthetic mesophase of titanium (Ti) alloy are standby.By the weight hundred of contained component than taking by weighing pure magnesium and master alloy; Earlier pure magnesium is put into crucible, heat up heating and feeding shielding gas melt fully until magnesium ingot, add master alloy then and feed shielding gas; After treating that master alloy melts fully, can be by die casting, casting, technological formings such as extruding.Promptly obtain titanium rare-earth magnesium alloy of the present invention.
Utilize X diffraction and TEM that this titanium rare-earth magnesium alloy has been carried out the phase composite analysis.This strength of alloy is 280MPa, and yield strength is 186MPa, and elongation is 15%.
Yttrium, titanium have good strengthening effect to magnesium alloy, this be since yttrium, titanium solid solution in matrix and crystal boundary by due to the heat-stable compound sealing.Therefore, the Ti-Y-Mg alloy has higher heat resistance energy, even reaches the high-temperature behavior of thorium magnesium alloy.In addition, it also has excellent high-temperature oxidation resistance.The magnesium alloy that contains 9wt% is heated to 510 ℃ in damp atmosphere, keep 98 hours 1mg that only increase weight; The magnesium alloy of thoriated then increases weight and reaches 15mg.
Embodiment three: prepare the 100kg titanium rare-earth magnesium alloy by following proportioning, need weigh up each element and be: the magnesium (Mg) of 9 kilograms in aluminium (Al), 2 kilograms of silicon (Si), 0.2 kilogram of zirconium (Zr), 2 kilograms of lanthanums (La), 0.5 kilogram of cerium (Ce), 0.8 kilogram of titanium (Ti) and surplus.
The preparation method comprises in advance 9 kilograms in aluminium (Al), 2 kilograms of silicon (Si), 0.2 kilogram of zirconium (Zr), 2 kilograms of lanthanums (La), 0.5 kilogram of cerium (Ce), 0.8 kilogram of melting synthetic mesophase of titanium (Ti) alloy standby.By the weight hundred of contained component than taking by weighing pure magnesium and master alloy; Earlier pure magnesium is put into crucible, heat up heating and feeding shielding gas melt fully until magnesium ingot, add master alloy then and feed shielding gas; After treating that master alloy melts fully, can be by die casting, casting, technological formings such as extruding.Promptly obtain titanium rare-earth magnesium alloy of the present invention.
Utilize X diffraction and TEM that this titanium rare-earth magnesium alloy has been carried out the phase composite analysis.This strength of alloy is 282MPa, and yield strength is 198MPa, and elongation is 15%.
Embodiment four: prepare the 100kg titanium rare-earth magnesium alloy by following proportioning, need weigh up each element and be: the magnesium (Mg) of 4 kilograms in aluminium (Al), 2 kilograms on zinc (Zn), 1.0 kilograms of zirconiums (Zr), 3 kilograms of yttriums (Y), 1.0 kilograms of ceriums (Ce), 0.1 kilogram of terbium (Tb), 1.0 kilograms of titaniums (Ti) and surplus.
The preparation method comprises in advance 4 kilograms in aluminium (Al), 2 kilograms on zinc (Zn), 1.0 kilograms of zirconiums (Zr), 3 kilograms of yttriums (Y), 1.0 kilograms of ceriums (Ce), 0.1 kilogram of terbium (Tb), 1.0 kilograms of melting synthetic mesophases of titanium (Ti) alloy standby.By the weight hundred of contained component than taking by weighing pure magnesium and master alloy; Earlier pure magnesium is put into crucible, heat up heating and feeding shielding gas melt fully until magnesium ingot, add master alloy then and feed shielding gas; After treating that master alloy melts fully, can be by die casting, casting, technological formings such as extruding.Promptly obtain titanium rare-earth magnesium alloy of the present invention.
Utilize X diffraction and TEM that this titanium rare-earth magnesium alloy has been carried out the phase composite analysis.This strength of alloy is 285MPa, and yield strength is 197MPa, and elongation is 14.2%.
Embodiment five: prepare the 100kg titanium rare-earth magnesium alloy by following proportioning, need weigh up each element and be: the magnesium (Mg) of 5 kilograms in aluminium (Al), 2 kilograms on zinc (Zn), 0.8 kilogram of zirconium (Zr), 2 kilograms of neodymiums (Nb), 2 kilograms of lanthanums (La), 0.1 kilogram of terbium (Tb), 0.15 kilogram of scandium (Sc), 2.0 kilograms of titaniums (Ti) and surplus.
The preparation method comprises in advance 5 kilograms in aluminium (Al), 2 kilograms on zinc (Zn), 0.8 kilogram of zirconium (Zr), 2 kilograms of neodymiums (Nb), 2 kilograms of lanthanums (La), 0.1 kilogram of terbium (Tb), 0.15 kilogram of scandium (Sc), 2.0 kilograms of melting synthetic mesophases of titanium (Ti) alloy standby.By the weight hundred of contained component than taking by weighing pure magnesium and master alloy; Earlier pure magnesium is put into crucible, heat up heating and feeding shielding gas melt fully until magnesium ingot, add master alloy then and feed shielding gas; After treating that master alloy melts fully, can be by die casting, casting, technological formings such as extruding.Promptly obtain titanium rare-earth magnesium alloy of the present invention.
Utilize X diffraction and TEM that this titanium rare-earth magnesium alloy has been carried out the phase composite analysis.This strength of alloy is 286MPa, and yield strength is 199.3MPa, and elongation is 15%.
In the various embodiments described above, the intensification Heating temperature that pure magnesium is put into crucible is between 600-800 ℃, and the shielding gas that is fed is rare gas element or sulfur hexafluoride.The rare gas element that is fed is one or more, and rare gas element is nitrogen, helium, neon, argon, krypton, xenon.
Claims (4)
1. titanium rare-earth magnesium alloy, it is characterized in that: magnesium, rare earth, titanium etc. are formed the basic alloy composition, the weight percent of its contained component consists of: aluminium 1.0%--9.0%, zinc 1.0%--5.0%, silicon 0.2%--3.0%, manganese 0.5%--7.0%, rare earth 0.01%--15.0%, titanium 0.01%--3.0%, zirconium 0.0%--2.0%, magnesium surplus.
2. according to the described titanium rare-earth magnesium alloy of claim 1, it is characterized in that: rare earth comprises one or more in lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, the scandium.
3. according to the described titanium rare-earth magnesium alloy of claim 1, it is characterized in that it being can contain three kinds of compositions simultaneously in the basic alloy composition, zinc, silicon, manganese also can only contain wherein any one.
4. its preparation method of a titanium rare-earth magnesium alloy is characterized in that preparation method's processing step is:
1. in advance according to the weight hundred of contained component than being grouped into, with aluminium, zinc, silicon, manganese, rare earth, titanium, zirconium synthetic mesophase alloy;
2. the weight percent by contained component takes by weighing pure magnesium and master alloy;
3. earlier pure magnesium is put into crucible, be warming up between 600-800 ℃, when heating up and feed shielding gas, shielding gas is rare gas element or sulfur hexafluoride, melts fully until magnesium ingot by heating;
4. after treating that master alloy melts fully, can be by die casting, casting, technological formings such as extruding.
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|---|---|---|---|
| CN2007101574215A CN101130841B (en) | 2007-10-11 | 2007-10-11 | Titanium rare-earth magnesium alloy |
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| CN2007101574215A CN101130841B (en) | 2007-10-11 | 2007-10-11 | Titanium rare-earth magnesium alloy |
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| CN101130841A true CN101130841A (en) | 2008-02-27 |
| CN101130841B CN101130841B (en) | 2010-08-25 |
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| CN102400024A (en) * | 2011-11-14 | 2012-04-04 | 周涛 | Magnesium alloy for housing of electric bicycle instrument panel |
| CN102400023A (en) * | 2011-11-14 | 2012-04-04 | 周涛 | Preparation method of magnesium alloy for housing of electric bicycle instrument panel |
| CN102534329A (en) * | 2012-03-29 | 2012-07-04 | 成都青元泛镁科技有限公司 | Preparation method for magnesium alloy with high strength and large plasticity |
| CN102994840A (en) * | 2011-09-09 | 2013-03-27 | 武汉铁盟机电有限公司 | MgAlZn heat resistance magnesium alloy |
| CN103451501A (en) * | 2013-08-27 | 2013-12-18 | 苏州长盛机电有限公司 | Magnesium alloy |
| CN103469040A (en) * | 2013-09-18 | 2013-12-25 | 天津大学 | Composite rare earth Nd and Y added flame-retardant magnesium alloy and ignition point testing method thereof |
| CN105220042A (en) * | 2014-06-30 | 2016-01-06 | 比亚迪股份有限公司 | A kind of magnesium alloy and its preparation method and application |
| CN105220044A (en) * | 2014-06-12 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | A kind of new multicomponent is rotten containing Si high-strength heat-resistant magnesium alloy and preparation method thereof |
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- 2007-10-11 CN CN2007101574215A patent/CN101130841B/en not_active Expired - Fee Related
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| CN102994840B (en) * | 2011-09-09 | 2015-04-29 | 武汉铁盟机电有限公司 | MgAlZn heat resistance magnesium alloy |
| CN102994840A (en) * | 2011-09-09 | 2013-03-27 | 武汉铁盟机电有限公司 | MgAlZn heat resistance magnesium alloy |
| CN102400023A (en) * | 2011-11-14 | 2012-04-04 | 周涛 | Preparation method of magnesium alloy for housing of electric bicycle instrument panel |
| CN102400023B (en) * | 2011-11-14 | 2016-09-14 | 陈均 | A kind of preparation method of magnesium alloy for housing of electric bicycle instrument panel |
| CN102400024B (en) * | 2011-11-14 | 2016-11-30 | 泉州台商投资区尚良建筑装饰有限公司 | A kind of magnesium alloy for housing of electric bicycle instrument panel |
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| CN112680645A (en) * | 2020-12-17 | 2021-04-20 | 中国科学院长春应用化学研究所 | Rare earth Sm-containing self-foaming porous magnesium alloy and preparation method thereof |
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