CN101805866A - Wrought magnesium alloy for high-speed extrusion and preparation method thereof - Google Patents

Wrought magnesium alloy for high-speed extrusion and preparation method thereof Download PDF

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Publication number
CN101805866A
CN101805866A CN 201010152389 CN201010152389A CN101805866A CN 101805866 A CN101805866 A CN 101805866A CN 201010152389 CN201010152389 CN 201010152389 CN 201010152389 A CN201010152389 A CN 201010152389A CN 101805866 A CN101805866 A CN 101805866A
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alloy
speed
extruding
wrought magnesium
magnesium alloys
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CN101805866B (en
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王迎新
彭立明
蒋海燕
丁文江
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Jiangsu Favour Automotive New Stuff Sci-tech Co., Ltd.
Jiangsu Zhongli Group Co Ltd
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Shanghai Jiaotong University
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Abstract

The invention relates to wrought magnesium alloy for high-speed extrusion and a preparation method thereof, belonging to the technical field of metal processing, the weight percentage of components of the metal alloy is: 2-9% of Mn, 0.1-1% OF Si, 0.1-3% of Ce, 0.1-2% of Y, 0.1-1% of Sr, 0.1-1% of Sb, and the balance of Mg9995. The prepared metal alloy by the invention can carry out the high-speed extrusion production the extrusion speed of which is less than 15m/min, and can not dissolve during the process of the extrusion, the product after finishing the extrusion has higher mechanical properties, is suitable for automobile parts such as automobile window frame, seat framework and the like, and can also be extruded into a bar as part blank of aerospace field.

Description

Be used for wrought magnesium alloys of extruding at a high speed and preparation method thereof
Technical field
What the present invention relates to is the Alloy And Preparation Method in a kind of metalworking technology field, specifically is that a kind of extrusion speed that is used for is not less than wrought magnesium alloys of 15m/min and preparation method thereof.
Background technology
Magnesium alloy is one of structural metallic materials of density minimum, is described as " commercial environmental protection of 21 century and ecological structural metallic materials ".Fast development of automotive industry in recent years and urgent automobile lightweight (energy-conservation, safety, environmental protection) require the consumption of magnesium alloy on automobile increased rapidly.Deformed magnesium alloy material can provide the various plate of size, rod, section bar and forging products, and can control by materials microstructure, thermal treatment process is improved, obtain higher intensity, better ductility reaches more diversified mechanical property, can satisfy the requirement of diversified structural part, this just is fit to adopt the press working product characteristics more and more in the automobile.Therefore, wrought magnesium alloys and goods thereof will be represented 21 century magnesium alloy higher level application direction in automotive industry, its Application Areas can further expand space flight and aviation, communications and transportation, electron device, physical culture, office to, especially military industry field develops wrought magnesium alloys and deformation processing technology thereof and has great importance.
Mg-Al-Zn is that alloy is the commercial wrought magnesium alloys of using always, this and its extrudability can be high and good comprehensive mechanical properties be undivided.The Al element has very big room temperature solution strengthening ability in magnesium, high if desired yield strength, and Al content can be increased to about 8%.But, in this alloy system, low Al content is often to adopt, because but low Al content can improve the extrusion speed of its maximum significantly, to reduce production costs, wherein the maximum extrusion speed of AZ31 alloy can reach 20m/min, when Al content increases to 8%, be the AZ80 alloy, its maximum extrusion speed has only about 2m/min, and production cost is very high.Therefore, the AZ31 alloy is present the most frequently used commercial wrought magnesium alloys.
Find through retrieval prior art, open blue or green next, Lu Chen, Ding Wenjiang, the research of shunting extrusion magnesium alloy pipe craft, (" light alloy processing technology ", 2003,31 (10), 28-30) disclose a kind of employing divergent die and carried out the magnesium alloy pipe extrusion method for producing, its extrusion billet adopts AZ31B alloy continuous casting rod, and extrusion speed is at 0.5-1.5m/min, because the extrusion ratio of the tubing of producing is bigger, therefore along with the increase of extrusion speed, the temperature rise that produces in the extrusion process also raises, and makes the temperature at the mould outlet place sharply rise, can cause the significant grain growth of extruding end of a period product like this, even cause the surface of squeezing prod crackle to occur.
Further retrieval is found, Yuan Guangyin, Sun Yangshan, Zhang Weimin, Bi to the influence of cast magnesium alloys tissue and mechanical property (" casting ", 1998,5, the strengthening phase of having put down in writing in the AZ31 alloy in p5-7) has only Mg 17Al 12, because its lower high-temperature stability can be fallen in fusion, can not form enough pinnings to stop growing up of crystal grain in extrusion process, make that the mechanical property of extruding end of a period product is lower.Keep pushing the higher mechanical property of end of a period product, then the extrusion speed of AZ31 alloy can not be greater than 10m/min, this with regard to indirect increase production cost.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of wrought magnesium alloys that is used for extruding at a high speed and preparation method thereof is provided, can be used for carrying out the high speed extrusion production that extrusion speed is not less than 15m/min, reduce production costs, extruding end of a period product grains is tiny and have a higher mechanical property.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of wrought magnesium alloys of extruding at a high speed that is used for, the weight percent of its component is: 2-9%Al, 0.1-1%Mn, 0.1-3%Si, 0.1-2%Ce, 0.1-1%Y, 0.1-1%Sr, 0.1-1%Sb, all the other are Mg 9995
Described Mg 9995Be meant: with reference to GB/T 3499-2003, its impurity element Ni≤0.001%, Cu≤0.002%, Fe≤0.003%.
The present invention relates to the above-mentioned preparation method of the wrought magnesium alloys of extruding at a high speed that is used for, at first industrial Mg alloy smelting furnace is heated to 400-500 ℃, add Mg 9995, fine aluminium ingot and pure silicon, treat that pure magnesium ingot, aluminium ingot and pure silicon all melt stirring after, add and be preheated to 180-220 ℃ Al-Mn 10-20, Mg-Ce 25-50, Mg-Y 25-90, Al-Sr 10-30Master alloy, alloy rise to 730-780 ℃ with the alloy liquid temp after all melting, add Sb, stir back adding refining agent of Mg alloy and carry out refining, after insulation is left standstill 20-60 minute, the alloy liquid temp is reduced to 690-760 ℃ pour into the wrought magnesium alloys that is used for the high speed extruding.
Easy operation of the present invention and production cost are lower, extrusion speed is not less than 15m/min, be improved largely than prior art, in the process of extruding at a high speed, can separate out Al-Mn phase, Mg-Ce phase, Mg-Si phase, the Mg-Y phase of small and dispersed, Mg-Sb these alloy phases mutually has high melt point, in extrusion process, can not fuse, can play enough pinning effects to the crystal grain after the extruding grows up to stop it, tiny crystal grain has determined its extruding end of a period product to have higher mechanical property, can be used for trolley parts such as production window frame, chair framework; Can also be squeezed into bar, as the component blank of aerospace field.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The weight percent of each component of alloy is: 3%Al, 0.1%Mn, 0.5%Si, 0.3%Ce, 0.5%Y, 0.1%Sr, 0.6%Sb, all the other are Mg 9995
Press the mentioned component alloyage, industrial Mg alloy smelting furnace is heated to 400-500 ℃, add pure magnesium ingot (Mg 9995), fine aluminium ingot and pure silicon, treat that pure magnesium ingot, aluminium ingot and pure silicon all melt stirring after, add the Al-Mn that is preheated to about 200 ℃ 10, Mg-Ce 25, Mg-Y 60, Al-Sr 10Master alloy, alloy rise to 730-780 ℃ with the alloy liquid temp after all melting, add star antimony, stir the back and add refining agent of Mg alloy and carry out refining, after insulation is left standstill 20-60 minute, the alloy liquid temp is reduced to 690-760 ℃ pour into the filled circles ingot casting and push.
Alloy pig pushes at 420 ℃, and when extrusion speed was 15m/min, the mechanical property of its extruding end of a period product was as shown in the table:
Embodiment 2
The weight percent of each component of alloy is: 5%Al, 0.5%Mn, 2%Si, 1%Ce, 0.2%Y, 1Sr, 1%Sb, all the other are Mg 9995
Press the mentioned component alloyage, industrial Mg alloy smelting furnace is heated to 400-500 ℃, add pure magnesium ingot (Mg 9995), fine aluminium ingot and pure silicon, treat that pure magnesium ingot, aluminium ingot and pure silicon all melt stirring after, add the Al-Mn that is preheated to about 200 ℃ 15, Mg-Ce 35, Mg-Y 25, Al-Sr 30Master alloy, alloy rise to 730-780 ℃ with the alloy liquid temp after all melting, add star antimony, stir the back and add refining agent of Mg alloy and carry out refining, after insulation is left standstill 20-60 minute, the alloy liquid temp is reduced to 690-760 ℃ pour into the filled circles ingot casting and push.
Alloy pig pushes at 420 ℃, and when extrusion speed was 15m/min, the mechanical property of its extruding end of a period product was as shown in the table:
Embodiment 3
The weight percent of each component of alloy is: 8%Al, 1%Mn, 3%Si, 2%Ce, 1%Y, 0.5%Sr, 0.3%Sb, all the other are Mg 9995
Press the mentioned component alloyage, industrial Mg alloy smelting furnace is heated to 400-500 ℃, add pure magnesium ingot (Mg 9995), fine aluminium ingot and pure silicon, treat that pure magnesium ingot, aluminium ingot and pure silicon all melt stirring after, add the Al-Mn that is preheated to about 200 ℃ 20, Mg-Ce 50, Mg-Y 90, Al-Sr 20Master alloy, alloy rise to 730-780 ℃ with the alloy liquid temp after all melting, add star antimony, stir the back and add refining agent of Mg alloy and carry out refining, after insulation is left standstill 20-60 minute, the alloy liquid temp is reduced to 690-760 ℃ pour into the filled circles ingot casting and push.
Alloy pig pushes at 420 ℃, and when extrusion speed was 15m/min, the mechanical property of its extruding end of a period product was as shown in the table:

Claims (8)

1. one kind is used for the wrought magnesium alloys of extruding at a high speed, and it is characterized in that the weight percent of its component is: 2-9%Al, 0.1-1%Mn, 0.1-3%Si, 0.1-2%Ce, 0.1-1%Y, 0.1-1%Sr, 0.1-1%Sb, all the other are Mg 9995
2. the wrought magnesium alloys of extruding at a high speed that is used for according to claim 1 is characterized in that described Mg 9995Be meant: with reference to GB/T 3499-2003, its impurity element Ni≤0.001%, Cu≤0.002%, Fe≤0.003%.
3. at a high speed preparation method of the wrought magnesium alloys of extruding that is used for according to claim 1 is characterized in that:
1. at first with industrial Mg alloy smelting furnace heating, add Mg 9995, fine aluminium ingot and pure silicon;
2. after treating that pure magnesium ingot, aluminium ingot and pure silicon all melt stirring, add Al-Mn through preheating 10-20, Mg-Ce 25-50, Mg-Y 25-90, Al-Sr 10-30Master alloy;
3. after alloy all melts, alloy liquid is heated up, add Sb again;
4. stir back adding refining agent of Mg alloy and carry out refining;
5. with the cooling of alloy liquid, pour into the wrought magnesium alloys that is used for the high speed extruding after insulation is left standstill.
4. the at a high speed preparation method of the wrought magnesium alloys of extruding that is used for according to claim 3 is characterized in that, the 1. the heating described in the step be meant: be heated to 400-500 ℃.
5. the at a high speed preparation method of the wrought magnesium alloys of extruding that is used for according to claim 3 is characterized in that, the 2. Al-Mn through preheating described in the step 10-20, Mg-Ce 25-50, Mg-Y 25-90, Al-Sr 10-30Master alloy is meant: be preheated to 180-220 ℃.
6. the at a high speed preparation method of the wrought magnesium alloys of extruding that is used for according to claim 3 is characterized in that, the 3. alloy liquid is heated up described in the step being meant: the alloy liquid temp is risen to 730-780 ℃.
7. the at a high speed preparation method of the wrought magnesium alloys of extruding that is used for according to claim 3 is characterized in that, the 5. the insulation described in the step leave standstill and be meant: insulation was left standstill 20-60 minute.
8. the at a high speed preparation method of the wrought magnesium alloys of extruding that is used for according to claim 3 is characterized in that, the 5. the cooling of alloy liquid be meant described in the step: alloy liquid is cooled to 690-760 ℃.
CN2010101523893A 2010-04-21 2010-04-21 Wrought magnesium alloy for high-speed extrusion and preparation method thereof Active CN101805866B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102418020A (en) * 2011-12-02 2012-04-18 重庆市科学技术研究院 Reinforced AZ series magnesium alloy and preparation method thereof
CN102634697A (en) * 2012-05-02 2012-08-15 上海康臣特种金属材料有限公司 Aluminum-manganese intermediate alloy and preparation method thereof
CN108486445A (en) * 2018-04-13 2018-09-04 上海海洋大学 It is a kind of can crushing failure at high speed forming magnesium alloy and preparation method thereof
CN108893667A (en) * 2018-06-07 2018-11-27 北京华北轻合金有限公司 The preparation method of the magnesium alloy auto safety seat of anti-impact force

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1382823A (en) * 2001-03-14 2002-12-04 利优比株式会社 Creep resistance Dow metal
CN1560299A (en) * 2004-03-04 2005-01-05 上海交通大学 Strengthen magnesium base alloy containing Mg2 Si and Y composite and smelting casting technology thereof
CN101078077A (en) * 2007-06-26 2007-11-28 南京云海特种金属股份有限公司 Thermal deformation resistant magnesium alloy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1382823A (en) * 2001-03-14 2002-12-04 利优比株式会社 Creep resistance Dow metal
CN1560299A (en) * 2004-03-04 2005-01-05 上海交通大学 Strengthen magnesium base alloy containing Mg2 Si and Y composite and smelting casting technology thereof
CN101078077A (en) * 2007-06-26 2007-11-28 南京云海特种金属股份有限公司 Thermal deformation resistant magnesium alloy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102418020A (en) * 2011-12-02 2012-04-18 重庆市科学技术研究院 Reinforced AZ series magnesium alloy and preparation method thereof
CN102634697A (en) * 2012-05-02 2012-08-15 上海康臣特种金属材料有限公司 Aluminum-manganese intermediate alloy and preparation method thereof
CN108486445A (en) * 2018-04-13 2018-09-04 上海海洋大学 It is a kind of can crushing failure at high speed forming magnesium alloy and preparation method thereof
CN108893667A (en) * 2018-06-07 2018-11-27 北京华北轻合金有限公司 The preparation method of the magnesium alloy auto safety seat of anti-impact force

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