CN102828134B - Three-level aging heat treatment process for nanometer magnesium alloy - Google Patents
Three-level aging heat treatment process for nanometer magnesium alloy Download PDFInfo
- Publication number
- CN102828134B CN102828134B CN201210349708.9A CN201210349708A CN102828134B CN 102828134 B CN102828134 B CN 102828134B CN 201210349708 A CN201210349708 A CN 201210349708A CN 102828134 B CN102828134 B CN 102828134B
- Authority
- CN
- China
- Prior art keywords
- alloy
- nanometer
- treatment
- grades
- timeliness
- 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.)
- Expired - Fee Related
Links
Landscapes
- Forging (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention relates to a three-level aging heat treatment process for nanometer magnesium alloy. The alloy comprises the following components in percentage by mass: 6-13% of gadolinium, 2-6% of yttrium, 0.3-0.8% of zirconium, and the balance of magnesium and inevitable impurities. The nanometer magnesium alloy obtained by extrusion-fast cold forging with average crystallite size of 40-100 nm is subjected to level 1 aging heat treatment at 140-170 DEG C for 4-8 hours, and then the alloy subjected to level 1 aging treatment is subjected to level 2 aging heat treatment at 150-180 DEG C for 5-10 hours, finally the alloy subjected to level 2 aging treatment is subjected to level 3 aging heat treatment at 200-250 DEG C for 10-30 hours. Compared with the nanometer magnesium alloy without aging treatment, the strength and the yield strength of the alloy subjected to three-level aging heat treatment is increased by 100-105 MPa and 123-135 MPa respectively, and the alloy has a strength of extension of 705-750 MPa and yield strength of 670-715 MPa.
Description
Technical field
The present invention relates to nano material Field of Heat-treatment, particularly three grades of aging thermal treating process of a kind of nanometer Mg alloy.
Background technology
Nano material, because its excellent physicals, chemical property and mechanical property have been applied to many high-tech areas, is also penetrated into all respects of life.Nanometer Mg alloy not only has high damping that ordinary magnesium alloy has, Gao Biqiang, high than the advantage such as firm, also has high strength, good corrosion resisting property.Most of magnesium alloy all belong to ageing strengthening type alloy, thereby further to improve nanometer Mg alloy strength by timeliness thermal treatment be the key means that further improves nanometer Mg alloy strength.
Do not have at present bibliographical information to explore the aging thermal treating process of nanometer Mg alloy, be particularly directed to extruding-quick cold forging and make the nanometer Mg alloy making.
Summary of the invention
The object of the invention is to provide a kind of nanometer Mg alloy three grades of aging thermal treating process.
Three grades of aging thermal treating process of nanometer Mg alloy of the present invention, described nanometer Mg alloying constituent is (w%): Gd:6-13%, Y:2-6%, Zr:0.3-0.8%, all the other are Mg and not removable impurity element, comprise following concrete steps:
A. the nanometer Mg alloy that is 40-100nm by average grain size carries out the thermal treatment of one-level timeliness at 140 DEG C-170 DEG C, and the treatment time is 4-8h;
B. the alloy after one-level timeliness is carried out at 150-180 DEG C to secondary time effect thermal treatment, the treatment time is 5-10h.
C. finally the alloy after secondary time effect is carried out at 200-250 DEG C to three grades of timeliness thermal treatments, the treatment time is 10-30h.
The invention has the advantages that:
Due to magnesium alloy crystal grain exceed 100nm after mechanical property sharply decline, therefore nanometer Mg alloy and ordinary magnesium alloy aging thermal treating process difference are: in heat treatment process, can not make crystal grain too grow up, can not make grain-size exceed 100nm, but ensure that again the ageing treatment of magnesium alloy reaches peak value timeliness.The invention has the advantages that exploring strengthening adopts extruding-quick cold forging to make the best aging thermal treating process that the average grain size making is 40-100nm nanometer Mg alloy, adopt three grades of aging thermal treating process of the present invention to carry out ageing treatment to nanometer Mg alloy, magnesium alloy crystal grain can not be grown up, and can ensure the inner peak value timeliness that occurs of magnesium alloy.
By extruding described in this patent-cold forging is made the first one-level timeliness of carrying out at 140-170 DEG C of the nanometer Mg alloy making fast.Two variations of the inner generation of nanometer Mg alloy in one-level ag(e)ing process: most of internal stress that fast cold deformation causes is eliminated; Solute atoms starts segregation.Because the inner internal stress of alloy can make alloy migration energy for grain boundary reduce, so if the inner internal stress of nanometer Mg alloy is not eliminated, grain growth when it will cause follow-up high-temperature aging.Therefore, the first step low temperature aging is indispensable.
Alloy after one-level timeliness described in this patent is carried out at 150-180 DEG C to secondary time effect thermal treatment.In secondary time effect treating processes, the further segregation of solute atoms, and the inner internal stress of nanometer Mg alloy obtains basically eliminate.Secondary time effect adopts comparatively high temps can eliminate more internal forces, and promotes the quick segregation of solute atoms.
Alloy after secondary time effect described in this patent is carried out at 200-250 DEG C to three grades of timeliness, can promote the rapid forming core of second-phase, and reach peak value timeliness.
After these three grades of timeliness thermal treatments, nanometer Mg alloy strength improves 100-105MPa compared with nonageing state, and yield strength improves 123-135MPa, and tensile strength reaches 705-750MPa, and yield strength reaches 670-715MPa.
Brief description of the drawings
Fig. 1 is the nanometer Mg alloy product after thermal treatment.
The present invention, by regulating above-mentioned parameter, has done lots of comparing experiments.Below in conjunction with drawings and Examples, the present invention is further described.These embodiment are for the present invention is described, instead of limitation of the present invention, conceive under prerequisite technique of the present invention is improved in the present invention, all belong to protection scope of the present invention.
Embodiment
Embodiment 1
(alloying constituent is (w%): Gd:8% to the nanometer Mg alloy that is 50nm by average grain size, Y:4%, Zr:0.5%, all the other are Mg and not removable impurity element) at 165 DEG C, carry out first step ageing treatment, aging time 5h, then the nanometer Mg alloy after one-level ageing treatment is carried out to second stage ageing treatment, aging time 6h at 175 DEG C, finally the alloy after secondary time effect is carried out at 240 DEG C to three grades of ageing treatment, aging time 12h.According to GB/T228-2002 to aging state magnesium alloy carry out Mechanics Performance Testing and with timeliness before alloy contrast, result shows, in contrast to nonageing nanometer Mg alloy, aging state magnesium alloy room temperature tensile strength improves 102MPa, yield strength improves 132MPa, tensile strength is up to 749MPa, and yield strength is up to 710MPa.Concrete outcome is in table 1.
Embodiment 2
(alloying constituent is (w%): Gd:10% to the nanometer Mg alloy that is 70nm by average grain size, Y:6%, Zr:0.4%, all the other are Mg and not removable impurity element) at 155 DEG C, carry out first step ageing treatment, aging time 6h, then the nanometer Mg alloy after one-level ageing treatment is carried out to second stage ageing treatment, aging time 7h at 165 DEG C, finally the alloy after secondary time effect is carried out at 230 DEG C to three grades of ageing treatment, aging time 14h.According to GB/T228-2002 to aging state magnesium alloy carry out Mechanics Performance Testing and with timeliness before alloy contrast, result shows, in contrast to nonageing nanometer Mg alloy, aging state magnesium alloy room temperature tensile strength improves 105MPa, yield strength improves 123MPa, tensile strength is up to 739MPa, and yield strength is up to 692MPa.Concrete outcome is in table 1.
Embodiment 3
(alloying constituent is (w%) to the nanometer Mg alloy that is 90nm by average grain size: 12%, Y:3%, Zr:0.7%, all the other are Mg and not removable impurity element) at 145 DEG C, carry out first step ageing treatment, aging time 7h, then the nanometer Mg alloy after one-level ageing treatment is carried out to second stage ageing treatment, aging time 9h at 155 DEG C, finally the alloy after secondary time effect is carried out at 210 DEG C to three grades of ageing treatment, aging time 22h.According to GB/T228-2002 to aging state magnesium alloy carry out Mechanics Performance Testing and with timeliness before alloy contrast, result shows, in contrast to nonageing nanometer Mg alloy, aging state magnesium alloy room temperature tensile strength improves 100MPa, yield strength improves 128MPa, tensile strength is up to 710MPa, and yield strength is up to 675MPa.Concrete outcome is in table 1.
Claims (6)
1. three grades of aging thermal treating process of a nanometer Mg alloy, described nanometer Mg alloy mass percentage composition is: Gd:6-13%, Y:2-6%, Zr:0.3-0.8%, all the other are Mg and not removable impurity element, it is characterized in that: be the cold forging of extruding-fast to be made to the nanometer Mg alloy that the average grain size that makes is 40-100nm at 140-170 DEG C, carry out the thermal treatment of one-level timeliness, treatment time is 4-8h, alloy after one-level timeliness is carried out at 150-180 DEG C to secondary time effect thermal treatment, treatment time is 5-10h, alloy after secondary time effect is carried out at 200-250 DEG C to three grades of timeliness thermal treatments, treatment time is 10-30h, after these three grades of timeliness thermal treatments, nanometer Mg alloy strength improves 100-105MPa compared with nonageing state, yield strength improves 123-135MPa, tensile strength reaches 705-750MPa, yield strength reaches 670-715MPa.
2. three grades of aging thermal treating process of nanometer Mg alloy according to claim 1, it is characterized in that: the cold forging of described extruding-is fast made the nanometer Mg alloy that the average grain size that makes is 40-100nm, in the time that average grain size is 40-60nm, nanometer Mg alloy carries out the thermal treatment of one-level timeliness at 160-170 DEG C, and the treatment time is 4-6h; Nanometer Mg alloy after one-level timeliness is carried out to secondary time effect thermal treatment at 170-180 DEG C, and the treatment time is 5-7h; Nanometer Mg alloy after secondary time effect is carried out to three grades of timeliness thermal treatments at 230-250 DEG C, and the treatment time is 10-14h.
3. three grades of aging thermal treating process of nanometer Mg alloy according to claim 1, it is characterized in that: the nanometer Mg alloy that described average grain size is 40-100nm, in the time that average grain size is 40-60nm, after nanometer Mg alloy adopts 160-170 DEG C/4-6h+170-180 DEG C/5-7h+230-250 DEG C/10-14h institution of prescription to process, room temperature tensile strength improves 100-105MPa compared with nonageing state, yield strength improves 130-135MPa, tensile strength reaches 740-750MPa, and yield strength reaches 705-715MPa.
4. three grades of aging thermal treating process of nanometer Mg alloy according to claim 1, it is characterized in that: the cold forging of described extruding-is fast made the nanometer Mg alloy that the average grain size that makes is 40-100nm, in the time that average grain size is 61-80nm, nanometer Mg alloy carries out the thermal treatment of one-level timeliness at 150-160 DEG C, and the treatment time is 5-7h; Nanometer Mg alloy after one-level timeliness is carried out to secondary time effect thermal treatment at 160-170 DEG C, and the treatment time is 6-8h; Nanometer Mg alloy after secondary time effect is carried out to three grades of timeliness thermal treatments at 220-240 DEG C, and the treatment time is 12-16h.
5. three grades of aging thermal treating process of nanometer Mg alloy according to claim 1, it is characterized in that: the cold forging of described extruding-is fast made the nanometer Mg alloy that the average grain size that makes is 40-100nm, in the time that average grain size is 81-100nm, nanometer Mg alloy carries out the thermal treatment of one-level timeliness at 140-150 DEG C, and the treatment time is 6-8h; Nanometer Mg alloy after one-level timeliness is carried out to secondary time effect thermal treatment at 150-160 DEG C, and the treatment time is 8-10h; Nanometer Mg alloy after secondary time effect is carried out to three grades of timeliness thermal treatments at 200-220 DEG C, and the treatment time is 16-30h.
6. three grades of aging thermal treating process of nanometer Mg alloy according to claim 1, it is characterized in that: the nanometer Mg alloy that described average grain size is 40-100nm, in the time that average grain size is 81-100nm, after nanometer Mg alloy adopts 140-150 DEG C/6-8h+150-160 DEG C/8-10h+200-220 DEG C/16-30h institution of prescription to process, room temperature tensile strength is carried 100-105MPa compared with nonageing state, yield strength improves 125-130MPa, tensile strength reaches 705-715MPa, and yield strength reaches 670-680MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210349708.9A CN102828134B (en) | 2012-09-20 | 2012-09-20 | Three-level aging heat treatment process for nanometer magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210349708.9A CN102828134B (en) | 2012-09-20 | 2012-09-20 | Three-level aging heat treatment process for nanometer magnesium alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102828134A CN102828134A (en) | 2012-12-19 |
| CN102828134B true CN102828134B (en) | 2014-08-13 |
Family
ID=47331439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210349708.9A Expired - Fee Related CN102828134B (en) | 2012-09-20 | 2012-09-20 | Three-level aging heat treatment process for nanometer magnesium alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102828134B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108728710A (en) * | 2018-07-07 | 2018-11-02 | 中南大学 | A kind of strong nanometer gradient magnesium alloy preparation method of VW93M superelevation |
| CN108796330A (en) * | 2018-07-07 | 2018-11-13 | 中南大学 | A kind of strong Mg-Gd-Y-Zr nanometers of isomery magnesium alloy preparation method of superelevation |
| CN108707847B (en) * | 2018-07-07 | 2020-09-25 | 中南大学 | Aging heat treatment process for low-rare earth nano heterogeneous magnesium alloy |
| CN108707803A (en) * | 2018-07-07 | 2018-10-26 | 中南大学 | A kind of VW93M nanometer Mgs alloy aging heat treatment process |
| CN108715965A (en) * | 2018-07-07 | 2018-10-30 | 中南大学 | A kind of atom segregation and elementide strengthen VW93M magnesium alloy methods |
| CN108774719A (en) * | 2018-07-07 | 2018-11-09 | 中南大学 | A kind of nanometer Mg alloy aging heat treatment process |
| CN108486447A (en) * | 2018-07-07 | 2018-09-04 | 中南大学 | A kind of low rare earth nano magnesium alloy aging thermal treating process |
| CN108754366A (en) * | 2018-07-07 | 2018-11-06 | 中南大学 | A kind of high thermal stability VW93M nanometers of magnesium alloy preparation methods |
| CN108754367A (en) * | 2018-07-07 | 2018-11-06 | 中南大学 | A kind of atom segregation and elementide strengthen Mg-Gd-Y-Zr magnesium alloy methods |
| CN108728716A (en) * | 2018-07-07 | 2018-11-02 | 中南大学 | A kind of powerful block Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods of superelevation |
| CN108796329A (en) * | 2018-07-07 | 2018-11-13 | 中南大学 | A kind of high thermal stability Mg-Gd-Y-Zr nanometers of magnesium alloy preparation methods |
| CN108467982A (en) * | 2018-07-07 | 2018-08-31 | 中南大学 | A kind of Mg-Gd-Y-Zr nanometer Mgs alloy aging heat treatment process |
| CN108728715A (en) * | 2018-07-07 | 2018-11-02 | 中南大学 | A kind of powerful block nanometer magnesium alloy preparation method of VW93M superelevation |
| CN108728714A (en) * | 2018-07-07 | 2018-11-02 | 中南大学 | A kind of strong nanometer isomery magnesium alloy preparation method of VW93M superelevation |
| CN108774721A (en) * | 2018-07-07 | 2018-11-09 | 中南大学 | A kind of Mg-Gd-Y-Zr nanometers of isomery magnesium alloy aging thermal treating process |
| CN108774722A (en) * | 2018-07-07 | 2018-11-09 | 中南大学 | A kind of nanometer of isomery magnesium alloy aging thermal treating process |
| CN108707848A (en) * | 2018-07-07 | 2018-10-26 | 中南大学 | A kind of VW93M nanometers of isomery magnesium alloy aging thermal treating process |
| CN108728711A (en) * | 2018-07-07 | 2018-11-02 | 中南大学 | A kind of strong Mg-Gd-Y-Zr nanometer gradients magnesium alloy preparation method of superelevation |
| CN111187998B (en) * | 2020-02-20 | 2021-03-02 | 齐鲁工业大学 | Method for regulating and controlling grain structure of ZK60 deformed magnesium alloy and improving performance |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009039581A1 (en) * | 2007-09-28 | 2009-04-02 | Cast Crc Limited | Permanent mould cast magnesium alloy |
| CN101914712B (en) * | 2010-07-07 | 2012-01-04 | 中南大学 | Extrusion deformation process of high-strength magnesium alloy thick plate |
| CN102400071B (en) * | 2011-11-15 | 2013-03-13 | 中南大学 | Extrusion deformation technology for large-diameter high-strength heat resistant magnesium alloy pipes |
-
2012
- 2012-09-20 CN CN201210349708.9A patent/CN102828134B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102828134A (en) | 2012-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102828134B (en) | Three-level aging heat treatment process for nanometer magnesium alloy | |
| CN104801645B (en) | Forging method for high-temperature alloy GH3617M forged pieces | |
| CN102978552B (en) | Plastic deformation method for cast magnesium-gadolinium-yttrium-neodymium-zirconium (Mg-Gd-Y-Nd-Zr) rare earth magnesium-alloy component | |
| CN110184518A (en) | A kind of rapidly-soluble high-strength high-elongation ratio magnesium alloy and preparation method thereof | |
| CN102719642A (en) | Production process of high-strength high-toughness GH2132 rod/wire material | |
| CN106048486A (en) | Structure refinement method for Ti2AlNb alloy through (O+B2) two-phase region aging treatment | |
| CN101994072A (en) | Heat treatment method for improving obdurability of 7-series high strength aluminium alloy | |
| CN103103459A (en) | Large-scale forging and manufacture process wind electricity slewing bearing forging and manufacturing process | |
| CN113025857B (en) | Soluble magnesium alloy material for all-metal bridge plug rubber cylinder and preparation method thereof | |
| CN104046933A (en) | Thermal-mechanical treatment method for enhancing plasticity and forming property of high strength aluminum alloy sheet | |
| He et al. | Preparation and thermal shock characterization of yttrium doped tungsten-potassium alloy | |
| CN109706336A (en) | A kind of low cost preparation method of Ultra-fine Grained high-strength plasticity magnesium-rare earth | |
| CN104745880B (en) | A kind of high density kinetic energy superhigh intensity tungsten nickel heat-resisting alloy and preparation method | |
| Zhang et al. | Microstructure and strengthening mechanisms of molybdenum alloy wires doped with lanthanum oxide particles | |
| CN101985727A (en) | Heat treatment method suitable for high-strength aluminum alloy thick plates | |
| CN102127723B (en) | Thermomechanical treatment method for obtaining high-strength and high-toughness magnesium alloy | |
| CN102732772A (en) | Special compound rare-earth modifying agent for improving memory performance of CuZnAl memory alloy | |
| CN103757571A (en) | Preparation method for gamma-TiAl alloy fine fully lamellar microstructure with preferred oriented lamellar interface | |
| CN103540881B (en) | Processing method for improving drawing and pressing asymmetry of magnesium alloy | |
| CN105331863B (en) | A kind of heat-resisting nucleocapsid hardening constituent magnesium alloy and preparation method thereof | |
| CN104532090A (en) | 580Mpa-level aluminum alloy pipe for drill stem and manufacturing method thereof | |
| CN101509115A (en) | Thermal treatment method for Al-Zn-Mg-Sc-Zr alloy | |
| CN110195199B (en) | Multi-stage three-dimensional multiphase layered zirconium alloy and preparation method thereof | |
| CN104099507A (en) | High-strength and high-toughness rare earth magnesium alloy | |
| CN104651758A (en) | High-temperature high-strength aluminum-based amorphous composite material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170920 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |