CN113953343A - Preparation method of upsetting and asymmetric extrusion compounded one-step method light alloy - Google Patents
Preparation method of upsetting and asymmetric extrusion compounded one-step method light alloy Download PDFInfo
- Publication number
- CN113953343A CN113953343A CN202111198486.0A CN202111198486A CN113953343A CN 113953343 A CN113953343 A CN 113953343A CN 202111198486 A CN202111198486 A CN 202111198486A CN 113953343 A CN113953343 A CN 113953343A
- Authority
- CN
- China
- Prior art keywords
- extrusion
- bar
- upsetting
- asymmetric
- light alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910001234 light alloy Inorganic materials 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 239000002131 composite material Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005266 casting Methods 0.000 abstract description 7
- 239000013078 crystal Substances 0.000 abstract description 5
- 238000013329 compounding Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
Abstract
A one-step method light alloy preparation method of upsetting and asymmetric extrusion compounding, put the light alloy rod ingot casting into the resistance furnace to heat and process at first; then putting the heated bar cast ingot into an extrusion die with an extrusion cavity die inner diameter larger than the cast ingot diameter; and finally, extruding, upsetting a bar cast ingot into a bar with the diameter equal to the inner diameter of the extrusion cavity die in the extrusion process, and processing the bar into the bar through the asymmetrical extrusion forming channel hole. The invention successfully omits the heating process between two processing technologies through two technologies of composite upsetting and asymmetric extrusion, shortens the process flow, saves the energy, improves the production efficiency and reduces the manufacturing cost; the invention ensures that the crystal grain orientation is easy to randomize, is more beneficial to the alloy to obtain good isotropy, and realizes the aim of processing the high-performance light alloy bar by a one-step method.
Description
Technical Field
The invention belongs to the technical field of light alloy manufacturing, and particularly relates to a method for preparing a high-mechanical-property light alloy through upsetting and asymmetric extrusion rapid composite forming processes.
Background
Light structural metal materials such as magnesium alloy, aluminum alloy, titanium alloy and the like are expected to be used for achieving the goal of vehicle weight reduction, and further achieving the improvement of fuel oil rate and the reduction of carbon dioxide emission. In order to make the mechanical properties of the alloy reach the industrial application level, the light alloy is often used after a complex plastic processing process. Upsetting, as a common metal working method, can reduce the height of a billet and increase the cross-sectional area of the billet. In the actual industrial production of forged parts, upsetting is often performed first, and then subsequent processes such as extrusion and forging are performed, and even in some cases, reciprocal upsetting-extrusion processing is performed in order to obtain sufficient deformation to ensure alloy properties. However, both the heating process between the upsetting and extrusion processes and the increased number of upsetting-extrusion cycles result in higher processing costs. In addition, because the deformation force applied to the alloy in the traditional extrusion deformation process is single in direction, the crystal grains tend to present similar crystal orientation, namely, a strong texture harmful to the mechanical property is formed.
The invention patent CN112570480B discloses a method for realizing texture weakening of an ATX series magnesium alloy plate by adopting asymmetric extrusion, which is to carry out secondary asymmetric extrusion on the extruded plate, although the purpose of texture weakening can be achieved, the plate obtained by primary conventional extrusion needs to be heated and insulated for the second time before the secondary asymmetric extrusion, so that the process time is prolonged, the production efficiency is low, and the manufacturing cost is increased.
Disclosure of Invention
Aiming at the problems of low efficiency and high cost of the existing light alloy manufacturing process, the invention provides a one-step light alloy preparation method combining upsetting and asymmetric extrusion, which realizes the refinement of crystal grains and the weakening of texture in the alloy and improves the mechanical property of the light alloy while processing at low cost.
In order to achieve the purpose, the invention provides a method for preparing a light alloy by a one-step method of upsetting and asymmetric extrusion compounding, which is characterized by comprising the following steps of:
(1) putting the light alloy bar into a resistance furnace, heating to 350-550 ℃, and preserving heat for 2-4 h;
(2) putting the heated bar cast ingot into an extrusion die with an extrusion cavity die inner diameter larger than the cast ingot diameter; the inner part of the core mould of the extrusion mould consists of an extrusion mould cavity at the upper part and an asymmetric extrusion forming channel hole at the lower part; the extrusion ratio, namely the ratio of the inner diameter of the extrusion cavity die to the inner diameter of the asymmetrical extrusion forming channel hole is 26, and the ratio of the diameter of the bar ingot to the inner diameter of the extrusion cavity die in the step (2) is 0.5-0.8;
(3) starting extrusion, upsetting a bar cast ingot into a bar with the diameter equal to the inner diameter of an extrusion cavity die in the extrusion process, and processing the bar into the bar through an asymmetric extrusion forming channel hole;
preferably, the extrusion speed in step (3) is 0.2 to 2 mm/s.
Preferably, the distance ratio of the central line of the asymmetric extrusion forming channel hole to the extrusion die cavities at two sides in the step (3) is 2:1-4: 1.
Compared with the background art, the invention has the following beneficial effects:
(1) because the upsetting and the asymmetric extrusion are large plastic deformation modes, the deformation can be further increased by compounding the upsetting and the asymmetric extrusion, so that the grains can be sufficiently refined only through one-step deformation;
(2) compared with the conventional extrusion, the asymmetric extrusion introduces shear stress in the deformation process, increases the stress state of the alloy, ensures that the crystal grain orientation is easy to randomize, is more beneficial to the alloy to obtain good isotropy, and realizes the aim of processing a high-performance light alloy bar by a one-step method;
(3) by adopting the two processes of composite upsetting and asymmetric extrusion, the heating process between the two processing processes is successfully omitted, the process flow is shortened, the energy is saved, the production efficiency is improved, and the manufacturing cost is reduced;
(4) the composite forming process can be applied to various alloys, and is suitable for plastic processing of light alloys such as magnesium alloy, aluminum alloy, titanium alloy, zinc alloy and the like.
Drawings
FIG. 1 is a schematic cross-sectional view of a one-step process of upsetting and asymmetric extrusion;
FIG. 2 is a schematic view of a die for a one-step method of upsetting and asymmetric extrusion compounding;
in fig. 2, 1 is an extrusion rod, 2 is a billet, 3 is an extrusion die cavity, and 4 is an asymmetric extrusion molding passage hole.
Detailed Description
The following will further describe the specific implementation process of the composite molding method of the present invention by using 5 embodiments with reference to fig. 1 and fig. 2.
Example 1
(1) Selecting Mg-3Al-1Zn (wt.%) magnesium alloy cast billet rods with the height of 15 cm and the diameter of 9 cm;
(2) heating a casting blank bar to 350 ℃ and preserving heat for 3 h;
(3) putting the heated bar into an extrusion die with an extrusion die cavity diameter of 16 and a distance ratio of the central line of the asymmetric extrusion forming channel hole to the extrusion die cavities at two sides of 2: 1;
(4) starting extrusion, wherein the extrusion speed is 1mm/s, and the extrusion ratio is 26;
after composite forming, the average grain size of the bar is 2.8 μm, the yield strength is 234MPa, the tensile strength is 288MPa, and the elongation at break is 20.3%.
Example 2
(1) Selecting Mg-3Al-1Zn (wt.%) magnesium alloy cast billet rods with the height of 15 cm and the diameter of 9 cm;
(2) heating a casting blank bar to 350 ℃ and preserving heat for 3 h;
(3) putting the heated bar into an extrusion die with an extrusion die cavity diameter of 16 and a distance ratio of the central line of the asymmetric extrusion forming channel hole to the extrusion die cavities at two sides of 4: 1;
(4) starting extrusion, wherein the extrusion speed is 0.5mm/s, and the extrusion ratio is 26;
after composite forming, the average grain size of the bar is 2.1 μm, the yield strength is 284MPa, the tensile strength is 327MPa, and the elongation at break is 13.6%.
Example 3
(1) Selecting a magnesium alloy cast blank rod with the height of 10 cm and the diameter of 8 cm, wherein the magnesium alloy cast blank rod is Mg-2.0Al-0.8Sn-0.5Ca (wt.%);
(2) heating a casting blank bar to 400 ℃ and preserving heat for 4 h;
(3) putting the heated bar into an extrusion die with an extrusion die cavity diameter of 16 and a distance ratio of the central line of the asymmetric extrusion forming channel hole to the extrusion die cavities at two sides of 2: 1;
(4) starting extrusion, wherein the extrusion speed is 0.5mm/s, and the extrusion ratio is 26;
after composite forming, the average grain size of the bar is 3.2 μm, the yield strength is 251MPa, the tensile strength is 284MPa, and the elongation at break is 24.8%.
Example 4
(1) Selecting a magnesium alloy cast blank rod with the height of 10 cm and the diameter of 12 cm, wherein the magnesium alloy cast blank rod is Mg-2.0Al-0.8Sn-0.5Ca (wt.%);
(2) heating a casting blank bar to 400 ℃ and preserving heat for 4 h;
(3) putting the heated bar into an extrusion die with an extrusion die cavity diameter of 16 and a distance ratio of the central line of the asymmetric extrusion forming channel hole to the extrusion die cavities at two sides of 3: 1;
(4) starting extrusion, wherein the extrusion speed is 1.5mm/s, and the extrusion ratio is 26;
after composite forming, the average grain size of the bar was 4.1 μm, the yield strength was 217MPa, the tensile strength was 262MPa, and the elongation at break was 27.1%.
Example 5
(1) Selecting 6022 aluminum alloy casting blank bars with the height of 10 cm and the diameter of 10 cm;
(2) heating a casting blank bar to 550 ℃ and preserving heat for 2 h;
(3) putting the heated bar into an extrusion die with an extrusion die cavity diameter of 16 and a distance ratio of the left side and the right side of an extrusion forming channel hole to the extrusion die cavity of 2: 1;
(4) starting extrusion, wherein the extrusion speed is 2mm/s, and the extrusion ratio is 26;
after composite forming, the average grain size of the bar was 7.1 μm, the yield strength was 212MPa, the tensile strength was 296MPa, and the elongation at break was 29.4%.
Claims (3)
1. A preparation method of a one-step method light alloy compounded by upsetting and asymmetric extrusion is characterized by comprising the following steps:
(1) putting the light alloy bar into a resistance furnace, heating to 350-550 ℃, and preserving heat for 2-4 h;
(2) putting the heated bar cast ingot into an extrusion die with an extrusion cavity die inner diameter larger than the cast ingot diameter; the inner part of the core mould of the extrusion mould consists of an extrusion mould cavity at the upper part and an asymmetric extrusion forming channel hole at the lower part; the extrusion ratio, namely the ratio of the inner diameter of the extrusion cavity die to the inner diameter of the asymmetrical extrusion forming channel hole is 26, and the ratio of the diameter of the bar ingot to the inner diameter of the extrusion cavity die in the step (2) is 0.5-0.8;
(3) and (3) starting extrusion, upsetting the bar cast ingot into a bar with the diameter equal to the inner diameter of the extrusion cavity die in the extrusion process, and processing the bar into the bar through the asymmetrical extrusion forming channel hole.
2. The method for preparing the upsetting and asymmetric extruding composite one-step light alloy as claimed in claim 1, wherein the method comprises the following steps of: the extrusion speed in the step (3) is 0.2-2 mm/s.
3. The method for preparing the upsetting and asymmetric extruding composite one-step light alloy as claimed in claim 1, wherein the method comprises the following steps of: in the step (3), the distance ratio of the central line of the asymmetrical extrusion forming channel hole to the extrusion die cavities at the two sides is 2:1-4: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111198486.0A CN113953343A (en) | 2021-10-14 | 2021-10-14 | Preparation method of upsetting and asymmetric extrusion compounded one-step method light alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111198486.0A CN113953343A (en) | 2021-10-14 | 2021-10-14 | Preparation method of upsetting and asymmetric extrusion compounded one-step method light alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113953343A true CN113953343A (en) | 2022-01-21 |
Family
ID=79464550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111198486.0A Pending CN113953343A (en) | 2021-10-14 | 2021-10-14 | Preparation method of upsetting and asymmetric extrusion compounded one-step method light alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113953343A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114434103A (en) * | 2022-01-25 | 2022-05-06 | 青海中钛青锻装备制造有限公司 | Manufacturing method of high-strength 7055 aluminum alloy large-diameter bar |
| CN115591968A (en) * | 2022-10-10 | 2023-01-13 | 吉林大学（Cn） | Opposite spiral torsion extrusion die for high-performance plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861914A (en) * | 1981-10-09 | 1983-04-13 | Nippon Steel Corp | Manufacture of hot extrusion alloy material |
| CN107497874A (en) * | 2017-08-04 | 2017-12-22 | 重庆大学 | A kind of pressing method using curved interface structure regulating magnesium alloy plate texture |
| CN108188191A (en) * | 2017-12-29 | 2018-06-22 | 重庆大学 | A kind of Non-symmetric Extrusion device and its pressing method |
| CN109622648A (en) * | 2019-01-10 | 2019-04-16 | 吉林大学 | A kind of magnesium alloy asymmetric continuous large deformation extrusion process forming method |
| CN109772922A (en) * | 2019-03-12 | 2019-05-21 | 广东省材料与加工研究所 | A kind of crowded upsetting mold squeezes upsetting processing method and magnesium alloy center collet |
-
2021
- 2021-10-14 CN CN202111198486.0A patent/CN113953343A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861914A (en) * | 1981-10-09 | 1983-04-13 | Nippon Steel Corp | Manufacture of hot extrusion alloy material |
| CN107497874A (en) * | 2017-08-04 | 2017-12-22 | 重庆大学 | A kind of pressing method using curved interface structure regulating magnesium alloy plate texture |
| CN108188191A (en) * | 2017-12-29 | 2018-06-22 | 重庆大学 | A kind of Non-symmetric Extrusion device and its pressing method |
| CN109622648A (en) * | 2019-01-10 | 2019-04-16 | 吉林大学 | A kind of magnesium alloy asymmetric continuous large deformation extrusion process forming method |
| CN109772922A (en) * | 2019-03-12 | 2019-05-21 | 广东省材料与加工研究所 | A kind of crowded upsetting mold squeezes upsetting processing method and magnesium alloy center collet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114434103A (en) * | 2022-01-25 | 2022-05-06 | 青海中钛青锻装备制造有限公司 | Manufacturing method of high-strength 7055 aluminum alloy large-diameter bar |
| CN115591968A (en) * | 2022-10-10 | 2023-01-13 | 吉林大学（Cn） | Opposite spiral torsion extrusion die for high-performance plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102312143B (en) | Forging method of high-strength heatproof magnesium alloy | |
| CN113953343A (en) | Preparation method of upsetting and asymmetric extrusion compounded one-step method light alloy | |
| CN101850376B (en) | Method and die for forward extrusion and variable diameter bending extrusion of magnesium alloy semi-solid billets | |
| CN104493031B (en) | A kind of truck aluminium alloy wheel hub forging method | |
| CN104588428A (en) | Circular channel and corner based extruding and moulding mold and circular channel and corner based extruding and moulding method of magnesium alloy cup-shaped component | |
| CN103774015B (en) | A kind of forming technology of middle strength heatproof magnesium alloy triangular section | |
| CN105525179A (en) | Preparation method for rare-earth magnesium alloy large-size high-strength forged piece | |
| CN106544608B (en) | A kind of manufacturing process of the thick fine grain magnesium alloy with high strength and ductility forging of spy | |
| CN106140847B (en) | A kind of magnesium alloy compressional deformation processing unit (plant) and processing method | |
| CN102989764B (en) | High-yield processing method of ultra-fine crystal magnesium alloy thin plate | |
| CN106890865B (en) | Major diameter AQ80M magnesium alloy cake materials squeeze forging and integrate forming technology | |
| CN104625643B (en) | A kind of aluminium alloy wheel hub forging method | |
| CN105441840B (en) | A kind of hammering cogging method of high-strength heat-resistant magnesium alloy ingot casting | |
| CN107937772A (en) | A kind of method with aluminum alloy forged commercial vehicle wheel | |
| CN111790864B (en) | Forging method for improving oxidation resistance and electric breakdown performance of 6-series aluminum alloy | |
| CN102978552A (en) | Plastic deformation method for cast magnesium-gadolinium-yttrium-neodymium-zirconium (Mg-Gd-Y-Nd-Zr) rare earth magnesium-alloy component | |
| CN103388115A (en) | Preparation method of high-toughness magnesium alloy bar | |
| CN101773972A (en) | Pre-forming technology of high-strength aluminum alloy stock | |
| CN103447433A (en) | Preparation method of large-sized magnesium alloy forged disc | |
| CN102172750B (en) | Magnesium alloy construction member step temperature forming method | |
| CN114589284B (en) | One-fire cogging die and method for alloy bar stock and upsetting-extruding-upsetting large deformation method | |
| CN109877289B (en) | Seven-series aluminum alloy small part and die casting method thereof | |
| CN106756365B (en) | A kind of low cost high-speed extrusion magnesium alloy materials and its preparation process | |
| CN109622649A (en) | A kind of magnesium alloy continuous variable cross section large deformation extrusion process forming method | |
| CN107012376B (en) | A kind of the high-speed extrusion magnesium alloy deformation material and its preparation process of low content of rare earth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220121 |
|
| RJ01 | Rejection of invention patent application after publication |