CN110743996A - Forming method of high-strength corrosion-resistant magnesium alloy - Google Patents
Forming method of high-strength corrosion-resistant magnesium alloy Download PDFInfo
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- CN110743996A CN110743996A CN201911086121.1A CN201911086121A CN110743996A CN 110743996 A CN110743996 A CN 110743996A CN 201911086121 A CN201911086121 A CN 201911086121A CN 110743996 A CN110743996 A CN 110743996A
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- forming
- magnesium alloy
- die
- resistant magnesium
- strength corrosion
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses a method for forming a high-strength corrosion-resistant magnesium alloy, which comprises the following steps: (1) according to the equal volume principle, blanking is carried out on the extrusion rod; (2) heating the blank to 400 +/-10 ℃ and then preforming in a die; (3) heating the preformed piece to 400 +/-10 ℃ and then carrying out final forming in a mould; (4) the final shape is cold-shaped. The invention solves the problem of low isothermal forming performance of the magnesium alloy, the formed part has excellent surface quality, high strength, good toughness and high corrosion resistance, and the comprehensive performance is greatly improved; the die is not heated, the energy is saved, the forming speed is high, the production efficiency is improved, and the production cost is greatly reduced.
Description
Technical Field
The invention belongs to the field of manufacturing of magnesium alloy products, and particularly relates to a high-strength corrosion-resistant magnesium alloy forming method.
Background
The magnesium alloy is used as the lightest metal structure material, has wide application prospect in the fields of aerospace, automobiles, 3C and the like, can be used for preparing diversified products by adopting a casting method, but has low mechanical property and limits the application range of magnesium alloy products.
After the magnesium alloy is deformed, crystal grains are greatly refined, the mechanical property is obviously improved, the strengthening effect is 4 times that of the aluminum alloy, but the magnesium alloy serving as a close-packed hexagonal magnesium alloy has poor deformability and difficult forming, and for a complex magnesium alloy component, firstly, a plate/rod machine is adopted for addition forming, the flow line is discontinuous, the production period is long, and the processing cost is high; secondly, isothermal forming at the temperature close to that of the blank and the die is adopted, but multiple-pass forming is needed for forming the special structural characteristics, but the performance is reduced once per forging, and in the deformation process, due to deformation and temperature rise, grains grow up abnormally and rapidly, the performance reduction is accelerated, and if the deformation temperature is reduced, the blank is easy to crack, and the forming precision is poor. Therefore, it is necessary to provide a new method for forming high-strength corrosion-resistant magnesium alloy.
Disclosure of Invention
The invention aims to provide a high-strength corrosion-resistant magnesium alloy forming method aiming at the problem of low obdurability of the existing isothermal forming, which improves the obdurability of a formed part and realizes the integrated control of the obdurability, and the process is carried out according to the following steps:
(1) according to the equal volume principle, blanking is carried out on the extrusion rod;
(2) heating the blank to 400 +/-10 ℃ and then preforming in a die;
(3) heating the preformed piece to 400 +/-10 ℃ and then carrying out final forming in a mould;
(4) the final shape is cold-shaped.
The preforming and final forming conditions were as follows:
a. the strain rate is 0.8-3.0 s-1；
b. The temperature of the die is room temperature (about 25 ℃);
c. the time from the beginning of the contact between the blank/preformed piece and the die to the completion of the forming is less than or equal to 10 seconds.
The cold shaping rolling reduction is less than 4%.
The invention has the following effects: (1) the problem of low isothermal forming performance of the magnesium alloy is solved, the surface quality of a formed part is excellent, the strength is high, the toughness is good, the corrosion resistance is high, and the comprehensive performance is greatly improved, for example, the formed AZ80 magnesium alloy product has the tensile strength of more than 400MPa, the elongation after fracture of more than 9 percent, and the strength is improved by more than 30 percent compared with the domestic and foreign products of the same type. (2) The die is not heated, the energy is saved, the forming speed is high, the production efficiency is improved, and the production cost is greatly reduced.
Detailed Description
A method for forming a high-strength corrosion-resistant magnesium alloy specifically adopts an AZ80 magnesium alloy blank to form a component, and comprises the following steps:
(1) according to the equal volume principle, blanking is carried out on the extrusion rod;
(2) heating the blank to 350 +/-10 ℃, preserving heat for 3 hours, and performing in a die at a strain rate of 0.8s-1The time from the start of timing when the blank contacts the die to the completion of the forming was 10 seconds.
(3) Heating the preformed piece to 400 +/-10 ℃, preserving heat for 6 hours, and finally forming in a mold; strain rate of 3.0s-1The time from the start of the timing of contact of the preform with the mold to the completion of the molding was 6 seconds.
(4) And (5) performing cold shaping on the final formed piece, wherein the cold shaping rolling reduction is 4%.
The AZ80 formed piece has tensile strength of 413MPa and elongation of 11.0% after aging.
Claims (3)
1. A method for forming a high-strength corrosion-resistant magnesium alloy is characterized by comprising the following steps: it comprises the following steps:
(1) according to the equal volume principle, blanking is carried out on the extrusion rod;
(2) heating the blank to 400 +/-10 ℃ and then preforming in a die;
(3) heating the preformed piece to 400 +/-10 ℃ and then carrying out final forming in a mould;
(4) the final shape is cold-shaped.
2. A method of forming a high strength corrosion resistant magnesium alloy as recited in claim 1 wherein said preforming and final forming conditions are as follows:
a. the strain rate is 0.8-3.0 s-1；
b. The temperature of the die is room temperature (about 25 ℃);
c. the time from the beginning of the contact between the blank/preformed piece and the die to the completion of the forming is less than or equal to 10 seconds.
3. A method of forming a high strength corrosion resistant magnesium alloy as recited in claim 1 wherein said cold shaping draft is less than 4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911086121.1A CN110743996A (en) | 2019-11-08 | 2019-11-08 | Forming method of high-strength corrosion-resistant magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911086121.1A CN110743996A (en) | 2019-11-08 | 2019-11-08 | Forming method of high-strength corrosion-resistant magnesium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110743996A true CN110743996A (en) | 2020-02-04 |
Family
ID=69282613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911086121.1A Pending CN110743996A (en) | 2019-11-08 | 2019-11-08 | Forming method of high-strength corrosion-resistant magnesium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110743996A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1345641A (en) * | 2000-09-22 | 2002-04-24 | 江兴锻压工业股份有限公司 | Magnesium alloy forging formation technology |
| JP2002254132A (en) * | 2001-02-28 | 2002-09-10 | Kikusui Forging Co-Op | Hot forging and forming method for magnesium alloy member |
| CN1593809A (en) * | 2004-06-23 | 2005-03-16 | 重庆大学 | Magnesium alloy composite forming method |
| CN1824425A (en) * | 2005-02-21 | 2006-08-30 | 徐名钧 | Processing method of magnesium alloy product and its manufacturing process |
| CN102357631A (en) * | 2011-10-28 | 2012-02-22 | 中国兵器工业第五九研究所 | Forming method for magnesium alloy part |
| CN102513485A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Two-step heat press-forging molding method of magnesium alloy thin-wall element and molding die |
| EP2602338A1 (en) * | 2011-12-08 | 2013-06-12 | Fair Friend Green Technology Corporation | Manufacture method for magnesium alloy product |
-
2019
- 2019-11-08 CN CN201911086121.1A patent/CN110743996A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1345641A (en) * | 2000-09-22 | 2002-04-24 | 江兴锻压工业股份有限公司 | Magnesium alloy forging formation technology |
| JP2002254132A (en) * | 2001-02-28 | 2002-09-10 | Kikusui Forging Co-Op | Hot forging and forming method for magnesium alloy member |
| CN1593809A (en) * | 2004-06-23 | 2005-03-16 | 重庆大学 | Magnesium alloy composite forming method |
| CN1824425A (en) * | 2005-02-21 | 2006-08-30 | 徐名钧 | Processing method of magnesium alloy product and its manufacturing process |
| CN102357631A (en) * | 2011-10-28 | 2012-02-22 | 中国兵器工业第五九研究所 | Forming method for magnesium alloy part |
| CN102513485A (en) * | 2011-12-06 | 2012-06-27 | 中国科学院金属研究所 | Two-step heat press-forging molding method of magnesium alloy thin-wall element and molding die |
| EP2602338A1 (en) * | 2011-12-08 | 2013-06-12 | Fair Friend Green Technology Corporation | Manufacture method for magnesium alloy product |
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Application publication date: 20200204 |
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| WD01 | Invention patent application deemed withdrawn after publication |