CN102719718B - Deformed magnesium alloy and casting method and deformation processing method thereof - Google Patents
Deformed magnesium alloy and casting method and deformation processing method thereof Download PDFInfo
- Publication number
- CN102719718B CN102719718B CN201210222005.XA CN201210222005A CN102719718B CN 102719718 B CN102719718 B CN 102719718B CN 201210222005 A CN201210222005 A CN 201210222005A CN 102719718 B CN102719718 B CN 102719718B
- Authority
- CN
- China
- Prior art keywords
- temperature
- extrusion
- alloy
- melt
- processing method
- 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.)
- Active
Links
Landscapes
- Extrusion Of Metal (AREA)
Abstract
The invention relates to a deformed magnesium alloy and a casting method and a deformation processing method thereof. The deformed magnesium alloy comprises the following components in percentage by weight: 5.0 to 6.0 percent of Zn, 0.3 to 0.9 percent of Zr, 0.3 to 4.3 percent of Dy and the balance of Mg. The casting method for the magnesium alloy comprises the following steps of: raising the temperature to 730 DEG C under the protection of gas after Mg is melted, and adding Zn, a Mg-Zr intermediate alloy and a Mg-Dy intermediate alloy into a melt in sequence; adding a refining agent, stirring, raising the temperature to 750 to 760 DEG C, and standing for 30 minutes; and after the temperature of the melt is reduced to 715 DEG C, deslagging, and performing rapid solidification to obtain a casting blank. The deformation processing method for the magnesium alloy comprises the following steps of: performing homogenization treatment on the casting blank at the temperature of 400 DEG C, and performing forward extrusion under the conditions that the extrusion ratio is 40, extrusion temperature is 320 to 340 DEG C and extrusion speed is 1.5 to 2.5m/min. The defect of insufficient strength and plasticity of the conventional Mg-Zn-Zr series alloy is overcome, and the Mg-Zn-Zr-Dy alloy has a fine as-extruded structure and high room temperature and high temperature tensile mechanical properties.
Description
Technical field
The present invention relates to a kind of wrought magnesium alloys and casting method thereof and deformation processing method, specifically a kind of add rare earth element Dy wrought magnesium alloys and casting method and deformation processing method.
Background technology
Magnesium alloy has the advantages such as low density, high specific strength and specific rigidity, obtains increasingly extensive application in fields such as automobile, communication electronics and aerospace, becomes one of important at present high-strength light environmental protection structured material.Wrought magnesium alloys presents better ductility and over-all properties.High-strength ZK60 wrought magnesium alloys applies one of more commercial magnesium alloy at present, and its specific tenacity is strong 7075 aluminium alloys of superelevation, but its over-all properties still can not meet all application requiring, and mechanical property still awaits improving, particularly due to MgZn in tissue
2phase fusing point is only 347 DEG C, and cause its drawing by high temperature mechanical property poor, working temperature is generally no more than 150 DEG C.Rare earth elements RE has unique configuration of extra-nuclear electron and chemical property, the compound that can strengthen Binding Forces Between Atoms, reduce atomic diffusion rates, form high thermal stability, can reduce ingot casting microporosity simultaneously, reduces alloy hot cracking tendency, improve alloy corrosion resistance and reduce aluminium alloy oxidization burning loss and reduce oxide inclusion defect etc.Therefore adding RE is in the magnesium alloy the effective way improving its heat resistance.
The patent of invention that CN200410081258.5 name is called the high plastic magnesium alloy of rare-earth yttrium " a kind of containing " discloses and hinders growing up of recrystal grain in hot extrusion process by adding Rare Earth Y in ZK60 alloy, further crystal grain thinning, thus its plasticity is improved under maintenance alloy high strength condition.Mg-(5.0 ~ 8.5) Zn-(0.7 ~ 2.0) Y-(0.6 ~ 0.8) the Zr alloy extrusion state average grain size of this invention is 5 ~ 8 4. m, and room temperature tensile intensity is 322 ~ 337MPa, and unit elongation is 18 ~ 21.5%.
CN200710011501.X name is called, and " patent of invention effectively utilizing rare earth element y to strengthen Mg-Zn-Y-Zr series magnesium alloy and preparation method discloses by choosing rational Zn/Y ratio (6 ~ 15); the volumn concentration being incorporated into Icosahedral phases in Mg-Zn-Y-Zr alloy substrate is reached maximum, thus makes alloy obtain higher intensity and maintain good plasticity.The room temperature tensile intensity of Mg-(5 ~ 30) Zn ~ (0.5 ~ 5) Y-(0.3 ~ 0.8) the Zr alloy of this invention is 290 ~ 360MPa, and unit elongation is 10 ~ 18%.
Above-mentioned two patents all obtain good intensity and plasticity by adding Y, but Alloy At Room Temperature tensile mechanical properties still has much room for improvement, and particularly on the good plastic foundation of maintenance, improve intensity further.Both high Zn contents will cause hot cracking tendency to become serious, and not relate to drawing by high temperature mechanical property, and good drawing by high temperature mechanical property will contribute to the Application Areas widening magnesium alloy.
Summary of the invention
The object of the invention is the intensity and the plasticity deficiency that overcome the alloy existence of existing Mg-Zn-Zr system, propose a kind of wrought magnesium alloys improving intensity and plasticity.
Another object of the present invention is to provide a kind of casting method of described wrought magnesium alloys.
Another object of the present invention is to provide a kind of deformation processing method of described wrought magnesium alloys.
The component of wrought magnesium alloys of the present invention and weight percent thereof are: Zn5.0 ~ 6.0%, Zr0.3 ~ 0.9% and Dy0.3 ~ 4.3%, and all the other are Mg.
The component of the wrought magnesium alloys of the best of the present invention and weight percent thereof are: Zn5.0%, Zr0.3% and Dy4.3%, and all the other are Mg.
The casting method of wrought magnesium alloys of the present invention: at N
2and 0.2vol%SF
6under mixed gas protected, after technical pure Mg fusing, be warming up to 730 DEG C, successively technical pure Zn and Mg-Zr, Mg-Dy master alloy added in melt every 5min; Melt is stirred twice in 1h; Then add after JDMJ type refining agent stirs and be warming up to 750 ~ 760 DEG C, leave standstill 30min; Finally treat that melt temperature is cooled to 715 DEG C, pour into after slagging-off in the cylindrical forming mould forcing cooling, be rapidly solidificated into strand.
The deformation processing method of wrought magnesium alloys of the present invention: above-mentioned strand is at 400 DEG C of Homogenization Treatments 8h, and adopt forward extrusion mode, extrusion ratio is 40, and extrusion temperature is 320 ~ 340 DEG C, and extrusion speed is 1.5 ~ 2.5m/min.
Mg-Zn-Zr-Dy wrought magnesium alloys As-extruded average grain size of the present invention is 1 ~ 4 4. m; Room temperature tensile intensity is up to 370 ~ 395MPa, and tensile strength when unit elongation is 12 ~ 16.5%, 200 DEG C is 146 ~ 171MPa.
Dy belongs to heavy rare earth element, add in Mg-Zn-Zr alloy and generate high-melting-point Mg-Zn-Zr-Dy quaternary system alloy phase, promote the generation of dynamic recrystallization in process of deformation and suppress growing up of recrystal grain, improve its room temperature and drawing by high temperature mechanical property, widen the application of Mg-Zn-Zr series deformation magnesium alloy in fields such as automobile, communication electronics and aerospace.
The present invention, using 5.0 ~ 6.0%Zn as basal component, adds 0.3 ~ 0.9%Zr simultaneously and plays crystal grain thinning, adds the strengthening phase Mg-Zn-Dy that 0.3 ~ 4.3%Dy forms high thermal stability, and low melting point MgZn
2reduce until completely dissolve gradually mutually.Rational casting method effectively can ensure the dissolving of rare earth element and reduce its scaling loss.By rational deformation processing method, as low temperature and large extrusion ratio etc., through strong strain extruding crystal grain and Second Phase Particle by broken, refinement effectively, second-phase promotes the generation of dynamic recrystallization in hot extrusion process and suppresses growing up of recrystal grain, form micron order (1 ~ 4 4. Ultra-fine Grained m), tiny second-phase plays the effect of strengthened dispersion alloy matrix and pinning crystal boundary simultaneously, effectively hinders temperature grain slippage.Therefore Mg-Zn-Zr-Dy alloy of the present invention presents more tiny As-extruded tissue, better room temperature and drawing by high temperature mechanical property.
Accompanying drawing explanation
Fig. 1 is the As-extruded optical microstructure photo of embodiment 3 alloy;
Fig. 2 is the As-extruded scanning microstructure picture of embodiment 3 alloy;
Fig. 3 is the as cast condition XRD spectrum of embodiment 3 alloy.
DSC curve is heated when Fig. 4 is the as cast condition etc. of embodiment 3 alloy.Peak temperature is respectively the fusing of the corresponding Mg-Zn-Dy phases of two endotherm(ic)peaks of 458 DEG C and 555 DEG C, and peak temperature is that the endotherm(ic)peak of 637 DEG C is corresponding
the fusing of matrix.
Embodiment
Content in conjunction with technical solution of the present invention provides following three embodiments, but protection scope of the present invention is not limited to following three embodiments.
Embodiment 1
The weight percent of alloying constituent is: Zn5.5%, Zr0.6% and Dy0.3%, and all the other are Mg.
By mentioned component alloyage, its casting method is: at N
2and 0.2vol%SF
6under mixed gas protected, after technical pure Mg fusing, be warming up to 730 DEG C, successively technical pure Zn and Mg-Zr, Mg-Dy master alloy added in melt every 5min; Melt is stirred twice in 1h; Then add after JDMJ type refining agent stirs and be warming up to 750 ~ 760 DEG C, leave standstill 30min; Finally treat that melt temperature is cooled to 715 DEG C, pour into after slagging-off in the cylindrical forming mould forcing cooling, be rapidly solidificated into strand.Its deformation processing method is: above-mentioned strand is at 400 DEG C of Homogenization Treatments 8h, and adopt forward extrusion mode, extrusion ratio is 40, and extrusion temperature is 320 DEG C, and extrusion speed is 1.5m/min.
The As-extruded average grain size of embodiment 1 has been down to 4 4. m; Room temperature tensile intensity is increased to 370MPa, and unit elongation is 16.5%; 150 DEG C and 200 DEG C time tensile strength be increased to 215 and 146MPa respectively.
Embodiment 2
The weight percent of alloying constituent is: Zn6.0%, Zr0.9% and Dy2.1%, and all the other are Mg.
By mentioned component alloyage, its casting method is: at N
2and 0.2vol.%SF
6under mixed gas protected, after technical pure Mg fusing, be warming up to 730 DEG C, successively technical pure Zn and Mg-Zr, Mg-Dy master alloy added in melt every 5min; Melt is stirred twice in 1h; Then add after JDMJ type refining agent stirs and be warming up to 750 ~ 760 DEG C, leave standstill 30min; Finally treat that melt temperature is cooled to 715 DEG C, pour into after slagging-off in the cylindrical forming mould forcing cooling, be rapidly solidificated into strand.Its deformation processing method is: strand is at 400 DEG C of Homogenization Treatments 8h, and adopt forward extrusion mode, extrusion ratio is 40, and extrusion temperature is 330 DEG C, and extrusion speed is 2.0m/min.
The As-extruded average grain size of embodiment 2 is 2.5 4. m; Room temperature tensile intensity is more up to 380MPa, and unit elongation is 14%; The tensile strength of 150 DEG C and 200 DEG C is respectively 220 and 157MPa.
Embodiment 3
The weight percent of alloying constituent is: Zn5.0%, Zr0.3% and Dy4.3%, and all the other are Mg.
By mentioned component alloyage, its casting method is: at N
2and 0.2vol.%SF
6under mixed gas protected, after technical pure Mg fusing, be warming up to 730 DEG C, successively technical pure Zn and Mg-Zr, Mg-Dy master alloy added in melt every 5min; Melt is stirred twice in 1h; Then add after JDMJ type refining agent stirs and be warming up to 750 ~ 760 DEG C, leave standstill 30min; Finally treat that melt temperature is cooled to 715 DEG C, pour into after slagging-off in the cylindrical forming mould forcing cooling, be rapidly solidificated into strand.Its deformation processing method is: strand is at 400 DEG C of Homogenization Treatments 8h, and adopt forward extrusion mode, extrusion ratio is 40, and extrusion temperature is 340 DEG C, and extrusion speed is 2.5m/min.
The average grain size of the As-extruded alloy of embodiment 3 is only 1 4. m; Room temperature tensile intensity is more up to 395MPa, and unit elongation is 12%; The tensile strength of 150 DEG C and 200 DEG C is respectively 225 and 171MPa.
The As-extruded average grain size of embodiments of the invention and comparative example and tensile mechanical properties are listed in table 1.
The As-extruded average grain size of table 1 embodiment and comparative example and tensile mechanical properties
*comparative example 1:ZL200410081258.5; Comparative example 2:ZL200710011501.X
Claims (2)
1. the founding of wrought magnesium alloys and a deformation processing method, it is characterized in that the component of described wrought magnesium alloys and weight percent thereof are: Zn 5.0 ~ 6.0%, Zr 0.3 ~ 0.9% and Dy2.1 ~ 4.3%, all the other are Mg; At N
2and 0.2vol%SF
6under mixed gas protected, after technical pure Mg fusing, be warming up to 730 DEG C, successively technical pure Zn and Mg-Zr, Mg-Dy master alloy added in melt every 5min; Melt is stirred twice in 1h; Then add after JDMJ type refining agent stirs and be warming up to 750 ~ 760 DEG C, leave standstill 30min; Finally treat that melt temperature is cooled to 715 DEG C, pour into after slagging-off in the cylindrical forming mould forcing cooling, be rapidly solidificated into strand; Above-mentioned strand is at 400 DEG C of Homogenization Treatments 8h, and adopt forward extrusion mode, extrusion ratio is 40, and extrusion temperature is 320 ~ 340 DEG C, and extrusion speed is 1.5 ~ 2.5m/min.
2. the founding of wrought magnesium alloys according to claim 1 and deformation processing method, it is characterized in that the component of described wrought magnesium alloys and weight percent thereof are: Zn 6.0%, Zr 0.9% and Dy 2.1%, all the other are Mg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210222005.XA CN102719718B (en) | 2012-06-29 | 2012-06-29 | Deformed magnesium alloy and casting method and deformation processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210222005.XA CN102719718B (en) | 2012-06-29 | 2012-06-29 | Deformed magnesium alloy and casting method and deformation processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102719718A CN102719718A (en) | 2012-10-10 |
| CN102719718B true CN102719718B (en) | 2014-12-31 |
Family
ID=46945581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210222005.XA Active CN102719718B (en) | 2012-06-29 | 2012-06-29 | Deformed magnesium alloy and casting method and deformation processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102719718B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238978A (en) * | 2015-09-28 | 2016-01-13 | 天津东义镁制品股份有限公司 | Preparation method of high-strength magnesium alloy profile |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866170B (en) * | 2014-02-25 | 2016-03-30 | 广东省工业技术研究院(广州有色金属研究院) | The preparation method of a kind of magnesium-rare earth and thin plate thereof |
| CN105603283B (en) * | 2016-03-31 | 2017-07-07 | 哈尔滨理工大学 | A kind of method for preparing and shaping high-strength and high ductility wrought magnesium alloy |
| CN108342630B (en) * | 2018-05-18 | 2020-03-31 | 句容百利镁合金材料科技有限公司 | Magnesium alloy, preparation method of magnesium alloy section bar and preparation method of magnesium alloy rim |
| CN109930041A (en) * | 2018-12-25 | 2019-06-25 | 西安交通大学 | A kind of high-ductility in-situ nano particle reinforced magnesium base compound material and preparation method thereof |
-
2012
- 2012-06-29 CN CN201210222005.XA patent/CN102719718B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| Dy和Y对ZK60镁合金铸态组织和力学性能的影响;刘楚明等;《中南大学学报(自然科学版)》;20100831;第41卷(第4期);1303-1309 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105238978A (en) * | 2015-09-28 | 2016-01-13 | 天津东义镁制品股份有限公司 | Preparation method of high-strength magnesium alloy profile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102719718A (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102978460B (en) | Al-Fe-Ni-RE aluminum alloy, and preparation method and power cable thereof | |
| US10870905B2 (en) | Low-cost high-heat-conduction die-casting magnesium alloy and manufacturing method therefor | |
| CN103103392B (en) | Al-Fe-Ag-RE aluminium alloy and preparation method thereof and power cable | |
| CN103103382B (en) | Al-Fe-Rh-RE aluminium alloy and preparation method thereof and power cable | |
| CN102719718B (en) | Deformed magnesium alloy and casting method and deformation processing method thereof | |
| CN105755340A (en) | Low-cost high-strength high-toughness high-thermal conductivity wrought magnesium alloy and preparation method thereof | |
| CN102978454B (en) | Al-Fe-Pd-RE aluminium alloy and preparation method thereof and power cable | |
| CN104032195B (en) | Efficiently-extrudable low-cost high-performance heat-conducting magnesium alloy and preparation method thereof | |
| CN102978471B (en) | Al-Fe-Ga-RE aluminium alloy and preparation method thereof and power cable | |
| CN102978450A (en) | Al-Fe-Mo-RE aluminum alloy, and preparation method and power cable thereof | |
| CN102978457B (en) | Al-Fe-Nb-RE aluminum alloy, and preparation method and power cable thereof | |
| CN102978478B (en) | Al-Fe-Mn-RE aluminium alloy and preparation method thereof and power cable | |
| CN105018813A (en) | Anti-creep rare earth magnesium alloy and preparation method thereof | |
| CN109930045A (en) | High-toughness heat-resistant Mg-Gd alloy and preparation method thereof suitable for gravitational casting | |
| CN102978477B (en) | Al-Fe-Ru-RE aluminium alloy and preparation method thereof and power cable | |
| CN103469039B (en) | The magnesium-aluminum-zinc wrought magnesium alloys of a kind of calcic and rare earth samarium | |
| CN111286658A (en) | High-thermal-conductivity flame-retardant magnesium alloy capable of being die-cast and preparation method thereof | |
| CN103146972B (en) | A kind of Multielement rare-earth magnesium alloy and preparation method thereof | |
| CN103290285A (en) | Magnesium-zinc-manganese-tin-yttrium alloy and preparation method of same | |
| CN101649405A (en) | Al-Mg-Mn-Zr-Sr alloy and preparation method thereof | |
| CN102978466B (en) | Al-Fe-Zr-RE aluminium alloy and preparation method thereof and power cable | |
| CN109852859A (en) | High-toughness heat-resistant Mg-Y-Er alloy and preparation method thereof suitable for gravitational casting | |
| EP2692883A2 (en) | Mg-al-ca-based master alloy for mg alloys, and a production method therefor | |
| CN104046872B (en) | A kind of wrought magnesium alloy Han Bi | |
| CN102978456B (en) | Al-Fe-Li-RE aluminium alloy and preparation method thereof and power cable |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171226 Address after: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee after: Guangdong Institute Of Materials And Processing Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: GUANGZHOU Research Institute OF NON FERROUS METALS |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510651 No. 363, Changxin Road, Guangzhou, Guangdong, Tianhe District Patentee after: Institute of materials and processing, Guangdong Academy of Sciences Address before: 510651 No. 363, Changxin Road, Guangzhou, Guangdong, Tianhe District Patentee before: Guangdong Institute Of Materials And Processing |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221109 Address after: 510651 No. 363, Changxin Road, Guangzhou, Guangdong, Tianhe District Patentee after: Institute of new materials, Guangdong Academy of Sciences Address before: 510651 No. 363, Changxin Road, Guangzhou, Guangdong, Tianhe District Patentee before: Institute of materials and processing, Guangdong Academy of Sciences |
|
| TR01 | Transfer of patent right |