CN1194111C - Heat-resistant rare earth magnesium alloy - Google Patents
Heat-resistant rare earth magnesium alloy Download PDFInfo
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- CN1194111C CN1194111C CNB03112769XA CN03112769A CN1194111C CN 1194111 C CN1194111 C CN 1194111C CN B03112769X A CNB03112769X A CN B03112769XA CN 03112769 A CN03112769 A CN 03112769A CN 1194111 C CN1194111 C CN 1194111C
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Abstract
The present invention discloses a heat-resistance rare earth magnesium alloy which comprises the compounds by the weight percentage proportioning: 4% to 10% of aluminum, 0.2% to 2% of zinc, 0.1% to 0.6% of manganese, 0.1% to 3.0% of calcium and magnesium as the rest, wherein the aluminum is a main strengthening element in the alloy and enhances the room-temperature strength of the alloy by solid solution strengthening and precipitation strengthening of a beta phase (Mg17Al12) formed with the magnesium. In addition, the addition of the aluminum also enhances the casting process property of the alloy to cause the present invention to be suitable for bulk production; the zinc is also a strengthening element in the alloy; although the strengthening effect of the zinc is not as good as that of the aluminum, the addition of the zinc can improve the plasticity of the alloy; the calcium of the present invention is an element for enhancing the heat resistance of the alloy, the heat stability of the beta phase in the alloy can be enhanced by adding a small amount of the calcium, and simultaneously, the microscopic structure of the alloy can be greatly refined so as to enhance the comprehensive mechanical property of the alloy at high temperature (100 to 200 DEG C).
Description
One, technical field
The present invention relates to a kind of light metal alloy material, especially relate to a kind of heat resisting magnesium-rare earth alloy.
Two, background technology
The density of magnesium alloy (proportion) is little, and specific rigidity and specific tenacity height are structural metallic materialss the lightest in the Industrial materials.Owing to adopted magnesium alloy structural part on automobile and the electronic industry, make Application of Magnesium obtain promoting in recent years.Yet compare with aluminium alloy, Application of Magnesium also has very big gap, and one of its reason is to lack enough hot strengths.After envrionment temperature surpassed 120 ℃, the intensity of general magnesium alloy descended rapidly, makes it and can't apply on many Industrial products and equipment.Be mainly used in the heat resistance magnesium alloy of aircraft industry though some have occurred after mid-term in 20th century, these alloys all are difficult to apply in general civilian industry.This mainly is because all contain the noble element (as neodymium, thorium, yttrium etc.) of higher proportion in these alloys, causes the cost of alloy not accepted by the general industry product.In addition, the magnesium alloy processing performance that these aviations are used is all undesirable, is not suitable for large-scale mass production, thereby has also limited applying of they.
Three, technology contents
Technical problem the invention provides a kind of heat resisting magnesium-rare earth alloy that is suitable for producing in batches, and this alloy has the advantage that cost is low, intensity is high.
A kind of heat resisting magnesium-rare earth alloy of technical scheme comprises aluminium, zinc, manganese, calcium and magnesium, and its proportioning (weight percent) is: aluminium: 4%～10%, and zinc: 0.2%～2%, manganese: 0.1%～0.6%, calcium: 0.1%～3.0%, all the other are magnesium.
Beneficial effect 1) aluminium is main strengthening element in the alloy, it by solution strengthening with form β (Mg mutually with magnesium
17Al
12) precipitation strength, improve alloy at room temperature intensity.In addition, the adding of aluminium has also improved the casting technique performance of alloy, makes the present invention be suitable for producing in batches.2) zinc also is the strengthening element in the alloy.Though its strengthening effect is not as aluminium, its adding can improve the plasticity of alloy.3) calcium is the element that is used to improve the alloy resistance toheat among the present invention, add a spot of calcium and can improve the thermostability of β phase in the alloy, the also microstructure of refinement alloy significantly simultaneously, thus the comprehensive mechanical property of alloy under high temperature (100-200 ℃) improved.4) rare earth is the element that the present invention is used to improve the alloy resistance toheat, and rare earth can form AL with aluminium after adding
11RE
3, the improvement of all favourable alloy high-temp intensity of this compound and creep-resistant property, among the present invention, under the identical situation of other constituent content, add 2% rare earth element after, can make alloy improve 6 times at 200 ℃ creep-resistant property.Under the acting in conjunction of calcium and rare earth, alloy of the present invention has performance characteristics such as intensity height, creep-resistant property be good at 120-200 ℃.Different with the heat resistance magnesium alloy that aircraft industry is used, do not contain noble metal elements such as neodymium, thorium, yttrium in the alloy of the present invention, so cost is low.5) effect of manganese mainly is the corrosion resistance nature that improves alloy.Manganese can form compound with the impurity element (as iron) in the alloy in the molten refining process of alloy, be deposited to the crucible bottom, thereby eliminates the deleterious effect of iron contamination to the alloy corrosion resistance nature.
Four, description of drawings
Fig. 1 is the room-temperature mechanical property of the embodiment of the invention 7.
Fig. 2 is the mechanical behavior under high temperature of the embodiment of the invention 7.AZ91 is a kind of magnesium alloy of standard brand, and the data of this AZ91 among the figure are the samples that prepare under similarity condition, and the data that obtain under same test condition.
Fig. 3 is the high-temperature creep resistance of the embodiment of the invention 7.AZ91 is a kind of magnesium alloy of standard brand, and the data of this AZ91 among the figure are the samples that prepare under similarity condition, and the data that obtain under same test condition.
Fig. 4 is the as-cast metallographic structure that contains rare earth alloy embodiment 7 among the present invention.
Fig. 5 be embodiment 7 at 200 ℃, the creep curve under the 50MPa condition.
Fig. 6 be embodiment 7 at 150 ℃, the creep curve under the 70MPa condition.
Five, specific embodiments
1 one kinds of heat resisting magnesium-rare earth alloys of embodiment comprise aluminium, zinc, manganese, calcium and magnesium, and its proportioning (weight percent) is: aluminium: 4%～10%, and zinc: 0.2%～2%, manganese: 0.1%～0.6%, calcium: 0.1%～3.0%, all the other are magnesium.
2 one kinds of heat resisting magnesium-rare earth alloys of embodiment, comprise aluminium, zinc, manganese, calcium, magnesium and rare earth, the proportioning of rare earth and other component (weight percent) is: aluminium: 4%～10%, zinc: 0.2%～2%, manganese: 0.1%～0.6%, calcium: 0.1%～3.0%, rare earth: 0.5%～3.0%, all the other are magnesium.
3 one kinds of heat resisting magnesium-rare earth alloys of embodiment are made up of aluminium, zinc, manganese, calcium, magnesium and rare earth, and the proportioning of rare earth and other component (weight percent) is: aluminium: 10%, and zinc: 0.2%, manganese: 0.12%, calcium: 0.1%, rare earth: 3.0%, the magnesium surplus.
4 one kinds of heat resisting magnesium-rare earth alloys of embodiment are made up of aluminium, zinc, manganese, calcium, magnesium and rare earth, and the proportioning of rare earth and other component (weight percent) is: aluminium: 8%, and zinc: 0.6%, manganese: 0.3%, calcium: 0.3%, rare earth: 0%, the magnesium surplus.
5 one kinds of heat resisting magnesium-rare earth alloys of embodiment are made up of aluminium, zinc, manganese, calcium, magnesium and rare earth, and the proportioning of rare earth and other component (weight percent) is: aluminium: 6%, and zinc: 1.3%, manganese: 0.45%, calcium: 1.5%, rare earth: 2.0%, the magnesium surplus.
6 one kinds of heat resisting magnesium-rare earth alloys of embodiment are made up of aluminium, zinc, manganese, calcium, magnesium and rare earth, and the proportioning of rare earth and other component (weight percent) is: aluminium: 4%, and zinc: 1.9%, manganese: 0.6%, calcium: 2.0%, rare earth: 0.1%, the magnesium surplus.
7 one kinds of heat resisting magnesium-rare earth alloys of embodiment are made up of aluminium, zinc, manganese, calcium, magnesium and rare earth, and the proportioning of rare earth and other component (weight percent) is: aluminium: 8%, zinc: 0.8%, manganese: 0.2%, calcium: 0.5%, rare earth: 2.0%, impurity≤0.5, magnesium surplus.
The present invention can prepare above-mentioned heat resistance magnesium alloy with following technology:
1) before molten alloy, to prepare magnesium calcium, magnesium rare earth intermediate alloy earlier.Pure magnesium ingot is placed crucible, and the heating that heats up is melted fully until magnesium ingot.Add pure calcium (preparation magnesium calcium master alloy) or mishmetal piece then, and feed shielding gas.After treating that calcium or rare earth melt fully, liquation is poured in the metal mold, get final product magnesium calcium master alloy, magnesium rare earth intermediate alloy.
2) during molten alloy earlier with pure magnesium, zinc, aluminium manganese master alloy (can buy) from market, put into crucible, and feed shielding gas.After the furnace charge that adds melts fully, add with the homemade magnesium calcium of aforesaid method, magnesium rare earth intermediate alloy, and continue logical shielding gas.After the master alloy fusing, can casting technique routinely obtain heat resistance magnesium alloy foundry goods of the present invention or ingot casting.
Claims (1)
1, a kind of heat resisting magnesium-rare earth alloy is characterized in that being made up of aluminium, zinc, manganese, calcium, rare earth and magnesium, and its proportioning (weight percent) is: aluminium: 4%～8%, zinc: 1.3%～2.0%, manganese: 0.3%～0.6%, calcium: 0.5%～3.0%, rare earth: 2.0%～3.0%, all the other are magnesium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03112769XA CN1194111C (en) | 2003-01-28 | 2003-01-28 | Heat-resistant rare earth magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03112769XA CN1194111C (en) | 2003-01-28 | 2003-01-28 | Heat-resistant rare earth magnesium alloy |
Publications (2)
| Publication Number | Publication Date |
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| CN1431329A CN1431329A (en) | 2003-07-23 |
| CN1194111C true CN1194111C (en) | 2005-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB03112769XA Expired - Fee Related CN1194111C (en) | 2003-01-28 | 2003-01-28 | Heat-resistant rare earth magnesium alloy |
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| CN (1) | CN1194111C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432251C (en) * | 2006-11-16 | 2008-11-12 | 太原理工大学 | Prepn process of high performance magnesium alloy |
| CN101308105B (en) * | 2007-05-16 | 2010-08-11 | 北京有色金属研究总院 | Rare-earth magnesium alloy solidification process thermal analysis device |
| CN101308106B (en) * | 2007-05-16 | 2010-08-11 | 北京有色金属研究总院 | Rare-earth magnesium alloy solidification process comparison heat analysis method |
| CN102162053B (en) * | 2011-03-11 | 2012-07-25 | 闻喜县瑞格镁业有限公司 | Preparation method of high-strength high-temperature-creep-resistant magnesium-rare earth alloy |
| CN103774014B (en) * | 2014-01-18 | 2016-03-30 | 中南大学 | A kind of forming technology of middle strength heatproof magnesium alloy slab |
| CN103774016B (en) * | 2014-01-18 | 2016-04-06 | 中南大学 | Strength heatproof magnesium alloy in one |
| CN105755340B (en) * | 2014-12-17 | 2017-12-26 | 宝山钢铁股份有限公司 | High strength and low cost high-ductility high heat conduction wrought magnesium alloy and preparation method thereof |
| CN106868367B (en) * | 2017-03-13 | 2018-08-07 | 浙江工贸职业技术学院 | A kind of magnesium alloy and its structural strength Enhancement Method |
| CN107164677B (en) * | 2017-05-17 | 2018-09-21 | 河南科技大学 | A kind of heat-resistant creep-resistant magnesium alloy and preparation method thereof |
| CN107130159B (en) * | 2017-05-22 | 2018-10-02 | 河南科技大学 | A kind of Ignition-proof Magnesium Alloy and preparation method thereof |
| CN109136699B (en) * | 2017-06-15 | 2021-07-09 | 比亚迪股份有限公司 | High-heat-conductivity magnesium alloy, inverter shell, inverter and automobile |
| CN109207824A (en) * | 2017-06-29 | 2019-01-15 | 比亚迪股份有限公司 | A kind of magnesium alloy and preparation method thereof and mobile phone |
| CN115449681B (en) * | 2022-10-10 | 2023-04-25 | 哈尔滨工业大学 | Super-corrosion-resistant high-strength high-plasticity magnesium alloy and preparation method thereof |
-
2003
- 2003-01-28 CN CNB03112769XA patent/CN1194111C/en not_active Expired - Fee Related
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