CN101892445A - Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation - Google Patents
Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation Download PDFInfo
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- CN101892445A CN101892445A CN 201010219696 CN201010219696A CN101892445A CN 101892445 A CN101892445 A CN 101892445A CN 201010219696 CN201010219696 CN 201010219696 CN 201010219696 A CN201010219696 A CN 201010219696A CN 101892445 A CN101892445 A CN 101892445A
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Abstract
The invention relates to a method for preparing a magnesium alloy bar with superhigh intensity by powerful deformation of a magnesium alloy with superhigh intensity. The bar comprises the following alloying ingredients in percentage by weight: 6 to 13 percent of Gd, 2 to 6 percent of Y, 0.3 to 0.8 percent of Zr, and the balance of Mg and inevitable impurity elements. The method comprises the following specific steps of: performing predeformation on a magnesium alloy semi-continuous casting blank to form the bar; and preparing the magnesium alloy with superhigh intensity by a powerful deformation method. The alloy can be subjected to obvious work hardening due to quick powerful deformation, so that the tensile strength of the alloy is more than 600MPa, the yield strength is more than 540MPa, and the elongation is more than 1 percent by matching with appropriate isothermal aging after the work hardening. Therefore, the requirements of the fields such as transportation, communication electronics, aerospace and the like on the magnesium alloy with superhigh intensity can be met and the application range of the magnesium alloy can be enlarged.
Description
Technical field
The present invention relates to the distortion field of magnesium alloy, particularly a kind of technology of preparing magnesium alloy bar with superhigh intensity by powerful deformation.
Background technology
Magnesium alloy is the lightest available metal structured material, has low density, high specific strength, advantages such as thermal conductivity is good, cushioning ability is strong, easily cutting, recyclable and dimensional stabilizing.At aerospace field, vehicle mass whenever alleviates 1g, and specific power can improve about 30%; And electric equipment products housing and support body will have good heat conduction, characteristics such as damping and electromagnetic shielding; Carrier is then because energy-saving and emission-reduction also require the weight of transportation means to reduce; This shows that magnesium alloy becomes the material that 21 worlds have development potentiality.But magnesium alloy often can not satisfy user's needs because intensity is low, becomes one of bottleneck of restriction magnesium alloy fast development.
Engineering circle is called the strong magnesium alloy of superelevation with the magnesium alloy of intensity＞500MPa at present, the Japan scholar utilizes powder metallurgy process to prepare the superelevation strong magnesium alloy of tensile strength up to 635MPa, does not utilize the semicontinuous casting ingot blank to prepare the strong magnesium alloy of superelevation of intensity＞500MPa but there is report to show at present as yet.Because the sintered metal product size is little, can not satisfy preparation large-scale component and the diversified requirement of structure, therefore seeking a kind of novel method of preparing the strong magnesium alloy of big specification superelevation becomes certainty, explores and develops a kind of technology for preparing superpower magnesium alloy and be significant.
Summary of the invention
The object of the invention is to provide a kind of method of preparing magnesium alloy bar with superhigh intensity by powerful deformation.Earlier become bar, prepare high-strength magnesium alloy by the described powerful deformation method of this patent then, and, make magnesium alloy strength＞600MPa in conjunction with final thermal treatment process with big specification magnesium ingot predeformation.
High-strength magnesium alloy of the present invention by quality percentage composition is: Gd:6-13%, Y:2-6%, Zr:0.3-0.8%, Cu≤0.001%, Ni≤0.001%, Fe≤0.015%, Si≤0.01%, Mn≤0.005%, impurity≤0.10%, all the other are Mg and the impurity element that can not remove.
Powerful deformation method of the present invention comprises following concrete steps:
A. semicontinuous casting ingot blank (diameter is Φ 97mm, and length is greater than 5000mm) predeformation is become bar (be of a size of Φ 15-25mm, length is greater than 3000-5000mm).
B. with the at room temperature powerful Fast Compression distortion of predeformation bar, hammerhead radial compression speed per second 3 times moves axially speed per minute 1500mm, power of motor 15KW, and distortion back bar temp is less than 100 ℃, and the severe deformation relative reduction in area is 13-37%;
C. behind the powerful deformation bar is carried out isothermal aging at 180-220 ℃, aging time 20-100h makes strength of alloy＞600Mpa.
Powerful deformation method of the present invention is the high speed cold distortion, and the alloy work hardening capacity is big, thereby can obtain the strong alloy bar material of superelevation of intensity 〉=460MPa, carries out isothermal aging behind the powerful deformation, and strength of alloy reaches 540-615Mpa, unit elongation＞1%.
Description of drawings:
Fig. 1 is 21.44% bar for relative reduction in area behind the severe deformation of the present invention.
Fig. 2 is 36.73% bar for relative reduction in area behind the severe deformation of the present invention.
The present invention has been a large amount of contrast experiments by regulating above-mentioned parameter.The present invention is further described below in conjunction with drawings and Examples.These embodiment are used to illustrate the present invention, rather than limitation of the present invention, conceive under the prerequisite in the present invention technology of the present invention is improved, and all belong to protection scope of the present invention.
Embodiment:
Embodiment 1:
A. become bar (to be of a size of Φ 22mm semicontinuous casting ingot blank (diameter is Φ 97mm, and length is 5000mm) predeformation.
B. with the at room temperature powerful Fast Compression distortion of predeformation bar, hammerhead radial compression speed per second 3 times moves axially speed per minute 1500mm, power of motor 15KW, and distortion back bar temp is less than 100 ℃, and the severe deformation relative reduction in area is 21.44%;
C. behind the powerful deformation bar is carried out isothermal aging at 220 ℃, aging time 20h;
Carry out Mechanics Performance Testing according to GB/T228-2002 after the ageing treatment, the results are shown in Table 1, the product photomacrograph is seen Fig. 1.
Embodiment 2:
A. semicontinuous casting ingot blank (diameter is Φ 97mm, and length is 5000mm) predeformation is become bar (being of a size of Φ 22mm).
B. with the at room temperature powerful Fast Compression distortion of predeformation bar, hammerhead radial compression speed per second 3 times moves axially speed per minute 1500mm, power of motor 15KW, and distortion back bar temp is less than 100 ℃, and the severe deformation relative reduction in area is 36.73%;
C. behind the powerful deformation bar is carried out isothermal aging at 180 ℃, aging time 100h;
Carry out Mechanics Performance Testing according to GB/T228-2002 after the ageing treatment, the results are shown in Table 1, the product photomacrograph is seen Fig. 1.
Table 1 powerful deformation magnesium alloy room temperature tensile mechanical performance
Claims (1)
1. the method for a preparing magnesium alloy bar with superhigh intensity by powerful deformation may further comprise the steps:
A. be Φ 97-Φ 210mm with diameter, length becomes Φ 15mm-Φ 25mm, length 3000-5000mm bar greater than the semicontinuous casting ingot blank predeformation of 5000mm;
B. with the at room temperature powerful Fast Compression distortion of predeformation bar, hammerhead radial compression speed per second 3 times moves axially speed per minute 1500mm, power of motor 15KW, and distortion back bar temp is less than 100 ℃, and the severe deformation relative reduction in area is 13-37%;
C. behind the powerful deformation bar is carried out isothermal aging at 180-220 ℃, aging time 20-100h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102196969A CN101892445B (en) | 2010-07-07 | 2010-07-07 | Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102196969A CN101892445B (en) | 2010-07-07 | 2010-07-07 | Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation |
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| CN101892445A true CN101892445A (en) | 2010-11-24 |
| CN101892445B CN101892445B (en) | 2011-11-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828133A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Method for preparing ultrahigh strength high toughness magnesium alloy |
| CN103769817A (en) * | 2014-01-18 | 2014-05-07 | 中南大学 | Large-diameter high-strength heat-resistant magnesium alloy thick-wall cylindrical workpiece forming process |
| CN106890865A (en) * | 2017-03-23 | 2017-06-27 | 中南大学 | Major diameter AQ80M magnesium alloy cakes material squeezes the integrated forming technology of forging |
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| CN1672828A (en) * | 2005-04-19 | 2005-09-28 | 哈尔滨工业大学 | Reverse temperature field extrusion process for producing microcrystal magnesium alloy |
| JP2005273891A (en) * | 2004-03-24 | 2005-10-06 | Akira Shodoshima | High strength bolt made of high strength magnesium alloy material manufactured by warm working |
| CN1789458A (en) * | 2005-12-12 | 2006-06-21 | 西安理工大学 | In-situ synthesizing quasi-crystal and approximate phase reinforced high-strength ultra-tough magnesium alloy and preparation method thereof |
| CN1888108A (en) * | 2006-07-26 | 2007-01-03 | 哈尔滨工业大学 | Cariaceous high-damping deformation magnesium alloy and its prepn process |
| RU2351686C1 (en) * | 2007-10-24 | 2009-04-10 | Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (РАН) (Государственное учреждение) | Meathod of alloys thermomechanical treatment on basis of magnesium |
| CN101538671A (en) * | 2009-04-23 | 2009-09-23 | 上海交通大学 | Rapid solidification superhigh strength magnesium alloy and preparation method thereof |
| WO2010005306A1 (en) * | 2008-07-08 | 2010-01-14 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Method and apparatus for continuous extrusion of thixo-magnesium into plate or bar shaped extrusion products |
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2010
- 2010-07-07 CN CN2010102196969A patent/CN101892445B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005273891A (en) * | 2004-03-24 | 2005-10-06 | Akira Shodoshima | High strength bolt made of high strength magnesium alloy material manufactured by warm working |
| CN1672828A (en) * | 2005-04-19 | 2005-09-28 | 哈尔滨工业大学 | Reverse temperature field extrusion process for producing microcrystal magnesium alloy |
| CN1789458A (en) * | 2005-12-12 | 2006-06-21 | 西安理工大学 | In-situ synthesizing quasi-crystal and approximate phase reinforced high-strength ultra-tough magnesium alloy and preparation method thereof |
| CN1888108A (en) * | 2006-07-26 | 2007-01-03 | 哈尔滨工业大学 | Cariaceous high-damping deformation magnesium alloy and its prepn process |
| RU2351686C1 (en) * | 2007-10-24 | 2009-04-10 | Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (РАН) (Государственное учреждение) | Meathod of alloys thermomechanical treatment on basis of magnesium |
| WO2010005306A1 (en) * | 2008-07-08 | 2010-01-14 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Method and apparatus for continuous extrusion of thixo-magnesium into plate or bar shaped extrusion products |
| CN101538671A (en) * | 2009-04-23 | 2009-09-23 | 上海交通大学 | Rapid solidification superhigh strength magnesium alloy and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828133A (en) * | 2012-09-20 | 2012-12-19 | 中南大学 | Method for preparing ultrahigh strength high toughness magnesium alloy |
| CN103769817A (en) * | 2014-01-18 | 2014-05-07 | 中南大学 | Large-diameter high-strength heat-resistant magnesium alloy thick-wall cylindrical workpiece forming process |
| CN106890865A (en) * | 2017-03-23 | 2017-06-27 | 中南大学 | Major diameter AQ80M magnesium alloy cakes material squeezes the integrated forming technology of forging |
| CN106890865B (en) * | 2017-03-23 | 2018-08-21 | 中南大学 | Major diameter AQ80M magnesium alloy cake materials squeeze forging and integrate forming technology |
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| CN101892445B (en) | 2011-11-09 |
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