CN108385006A - High-strength anti-flaming diecast magnesium alloy and preparation method thereof - Google Patents
High-strength anti-flaming diecast magnesium alloy and preparation method thereof Download PDFInfo
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- CN108385006A CN108385006A CN201810223234.0A CN201810223234A CN108385006A CN 108385006 A CN108385006 A CN 108385006A CN 201810223234 A CN201810223234 A CN 201810223234A CN 108385006 A CN108385006 A CN 108385006A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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Abstract
The invention discloses a kind of high-strength anti-flaming diecast magnesium alloy, the component content of the magnesium alloy is as follows：Al content is 4 10 wt.%, Ca contents are 0.20 2.0 wt.%, Zn contents are 0.05 0.90 wt.%, Y contents are 0.10 0.50 wt.%, Mn contents are 0.10 0.60 wt.%, La, Ce, Pr, Nd mischmetal content are 0 1.0 wt.%, and Fe contents are less than 0.003 wt.%, remaining is Mg and inevitable impurity element.There is the magnesium alloy excellent die casting performance and mechanical performance, the tensile strength of tensile sample can reach 300Mpa, yield strength 230Mpa, elongation percentage 10%；Ignition point is high, and 800 DEG C of flame contacts burn 180s, observes 60 s, and surface softening is unburned, without severe oxidation phenomenon.Production cost is low, non-toxic "dead", can be applied to the fields such as automotive light weight technology, home decoration, 3C Product.
Description
Technical field
The present invention relates to one kind being suitble to semi-solid forming magnesium alloy materials, has very good mechanical properties, while having reason
The flame-retarding characteristic thought belongs to nonferrous materials and metallurgical technology field.
Background technology
Magnesium alloy materials have numerous excellent spies such as density is small, specific strength and specific stiffness are high, damping capacity is good, is easily recycled
Property.Die casting process of magnesium alloy mature, production efficiency is high, and cost is greatly reduced, while with semisolid production technology and very
Application of the pneumatics casting at home in magnesium alloy market is gradually promoted and the progress of magnesium alloy new material technology, die casting are closed with magnesium
Golden new material will be more widely used：On the one hand it because its weight is lighter, heat dissipation performance is more excellent etc., will gradually substitute existing
Other nonferrous materials markets such as part aluminium alloy are applied, on the other hand as country supports energetically, more new research and development items
Mesh will make progress, and be expected to that more new markets can be created.Magnesium alloy materials are in house ornamentation, automotive light weight technology structural member, shared list
There is more wide hair with technical fields such as magnesium alloy accurate die castings in vehicle, medical treatment, aerospace and military aspect, 3C Product
Open up space.
But magnesium alloy also has its own limitation, because magnesium has higher oxidation to generate heat, chemical property is active, formation
MgO membrane is loose porous, is easy to aoxidize, and ignition point is low, brings very big difficulty in terms of production, processing and processing to magnesium alloy；Machine
Tool performance is relatively low, is extremely restricted in the manufacture use aspect of important feature part；Magnesium for die casting use especially half is solid
State die casting field, the trade mark is relatively fewer, more stays in the complete Journal of Sex Research of theoretical system and the exploration rank of actual production technology
Section, the particular problem encountered in practical application needs to wait for further solution, is especially ensureing the higher machinery of material
Magnesium alloy ignition point is improved while performance, die casting performance, in terms of improving alloy anti-flammability.
Invention content
The present invention use alloyage process, can not only preferably prevent the burning in magnesium alloy smelting and casting process, at
Shape part following process or the aerial fire-retardant and anti-oxidation problem of magnesium-alloy material parts are also well solved.This hair
Bright purpose is to provide a kind of high-strength anti-flaming diecast magnesium alloy and preparation method thereof.
To achieve the above object, the present invention takes technical solution as follows：
The component prescription of the present invention（Weight percent）For：Al content is that 4-10 wt.%, Ca content are 0.20-2.0wt.%, Zn
Content be 0.05-0.90 wt. %, Y content be 0.10-0.50 wt.%, Mn content be 0.10-0.60 wt.%, La, Ce, Pr,
Nd mischmetals（Ce contents are at least 55%）Content is that 0-0.10 wt.%, Fe contents are less than 0.003 wt.%, remaining for Mg and
Inevitable impurity element, the single content of impurity element are not more than 0.1 wt.%, and impurity element total content is not more than 0.1
wt.%。
Mechanical properties：Al, Ca appropriate, which are added in magnesium alloy, can form Al2Ca phases are deposited with lamellar pattern
There are apparent crystal grain thinning, precipitation strength effect, superfluous Al that can also reduce Mg2The precipitation of Ca phases（Mg2Ca phases are strong without precipitation
Change and ageing strengthening effect）, so that Ca elements is maximized the use, but when Ca too high levels, Al2Ca and Mg+Al2Ca eutectics incline
To in crystal boundary net distribution, alloy strength declines, and brittleness increases；High-melting-point Al can be precipitated in the addition of appropriate Y in the alloy2Y
Phase becomes the heterogeneous crystallization nucleis of α-Mg, and crystal grain thinning improves alloy high-temp characteristic, but high Y contents make Al in tissue2Y is poly-
Collection causes component segregation and nonuniform organization, reduces alloy mechanical property；Mn elements appropriate addition can crystal grain thinning, change
Kind material mechanical performance forms high melting compound with Fe, purifies melt, refine precipitated product, increases creep resistance；Mix RE
Element adds to form REAl3Phase, hence it is evident that improve microscopic structure, hence it is evident that improve alloy mechanical performance.
In terms of anti-flammability：The addition of alloy element Ca, Y, mixed rare earth can make alloy obtain preferable anti-flammability
Energy.Calcium oxide production heat be more than magnesium oxide production heat, add the oxidation film formed after Ca, RE appropriate mainly by
MgO, a small amount of CaO, a small amount of RE2O3Composition, and be in layered structure.When melt and air contact, it is initially formed CaO, RE2O3It is multiple
Layer is closed, MgO, CaO composite layer are subsequently formed, to prevent being in direct contact for magnesium and air.High-melting-point is precipitated after adding Y appropriate
Al2Y phases effectively improve material thermal stability.
The present invention casting technique be：
（1）Material prepares：Among metal magnesium ingot, Mg-Al intermediate alloys or Al ingots, Mg-Mn intermediate alloys or manganese metal, Mg-Ca
Alloy or metal Ca, Al-Zn intermediate alloy, the original of Mg-Y intermediate alloys or metal Y, mischmetal as each element in magnesium alloy
Material determines that the mass percent of ingredient weighs corresponding raw material by the component prescription range of the present invention；
（2）Shove charge is melted：The raw metal magnesium ingot weighed up is put into and carries out melting in smelting furnace, smelting temperature is 650 ~ 700
DEG C, until magnesium ingot is completely melt；
（3）Add alloying element：Serum Magnesium is gradually heated up from 650 ~ 700 DEG C and is warming up to 710 ~ 750 DEG C, at this temperature by
Required intermediate alloy or metal is gradually added；
（4）Refining carries slag：Between controlling 710 ~ 750 DEG C of melt temperature, 10 ~ 20 min are stirred, refining is added in whipping process
Agent is refined；After stand 20-30min, refining agent is added and carries out double refining, temperature is maintained at 710 ~ 750 DEG C, uniformly
20 ~ 30 min are stirred, slag is carried after refining, remove flux and dross on liquid level；
（5）Cool down static：Magnesium alloy fused mass standing is cooled to 630 ~ 690 DEG C, keeps the temperature 20 ~ 30 min；
（6）Sampling analysis, casting：Sampling analysis, ingredient is qualified, and casting is got product.
Simple production process of the present invention, the high-strength anti-flaming casting magnesium alloy provided have good die casting performance and mechanicalness
Can, tensile strength can reach 300Mpa, and yield strength can reach 230Mpa, and elongation percentage can reach 10%；Ignition point is high, 800 DEG C of flames
Burn 180 s, observe 60 s, surface softening it is unburned, without severe oxidation phenomenon, under the same conditions, AM50A magnesium alloys exist
There is combustion phenomena after catalytic combustion 70s.This technology middle rare earth usage amount is low simultaneously, greatly reduces production cost, and can
China's rare earth resources advantage is obtained into the performance of bigger；The addition of no beryllium element, it is non-toxic "dead" and in process of production without
Gas shield is needed, is environmentally friendly new material, the present invention relates to materials can be applied to automotive light weight technology, home decoration, 3C productions
The fields such as product.
Description of the drawings
Fig. 1 is magnesium alloy flat contact burner schematic diagram of the present invention.
Fig. 2 is that magnesium alloy open air gasoline flame combustion of the present invention verifies device schematic picture.
Fig. 3 is magnesium alloy cast metallograph of the present invention.
Specific implementation mode
Example done in embodiment is only used as example, in order to make those skilled in the art be better understood from this patent.
Protected object according to the present invention, is not limited to example, including all are by the alloying component configured in claims.With
The lower specific implementation mode for invention：
Embodiment 1：
（1）Whole metal magnesium ingots are put into crucible, under a shielding gas in 660 DEG C of meltings, until being completely melt, as base
Liquid；
（2）Serum Magnesium is gradually heated up from 660 DEG C and is warming up to 740 DEG C, be gradually added into during this period 5.0 wt. % aluminium, 0.5
Wt. the manganese of the zinc of the calcium of %, 0.45 wt. %, the yttrium of 0.2 wt.% and 0.15 wt.% obtain magnesium alloy fused mass；
（3）Temperature by magnesium alloy fused mass control at 740 DEG C stirs 10 min, and refining agent is added in whipping process and carries out essence
Refining；Refining finishes, and removes flux and dross on liquid level, then gently spread last layer coverture；It stands, refining agent is added and carries out two
Secondary refining, 740 DEG C of refining temperature, 20 min of uniform stirring carry slag after refining, remove flux and dross on liquid level；
（4）Magnesium alloy fused mass standing is cooled to 690 DEG C, keeps the temperature 20 min；
（5）Sampling analysis, ingredient is qualified, casts to get finished product when magnesium alloy fused mass temperature is down to 650 DEG C.
Embodiment 2：
（1）Whole metal magnesium ingots are put into crucible, under a shielding gas in 660 DEG C of meltings, until being completely melt, as base
Liquid；
（2）Serum Magnesium is gradually heated up from 660 DEG C and is warming up to 730 DEG C, be gradually added at this temperature 8.0 wt. % aluminium,
The zinc of the calcium of 1.0 wt. %, 0.60 wt. %, the yttrium of 0.35 wt. %, the manganese of 0.35 wt. %, the mixing of 0.5 wt. % are dilute
Soil obtains magnesium alloy fused mass；
（3）Temperature by magnesium alloy fused mass control at 730 DEG C stirs 10 min, and refining agent is added in whipping process and carries out essence
Refining；Refining finishes, and removes flux and dross on liquid level, then gently spread last layer coverture；Melting furnace temperature is maintained at 730
DEG C, refining agent is added and carries out double refining, 25 min of uniform stirring carries slag after refining, remove the flux on liquid level and float
Slag；
（4）Magnesium alloy fused mass standing is cooled to 675 DEG C, keeps the temperature 25 min；
（5）Sampling analysis, ingredient is qualified, casts to get finished product when magnesium alloy fused mass temperature is down to 640 DEG C.
Embodiment 3：
（1）Whole metal magnesium ingots are put into crucible, under a shielding gas in 650 DEG C of meltings, until being completely melt, as base
Liquid；
（2）Serum Magnesium is gradually heated up from 650 DEG C and is warming up to 710 DEG C, be gradually added at this temperature 9.5 wt. % aluminium,
The mixing of the zinc of the calcium of 1.5 wt. %, 0.90 wt. %, the yttrium of 0. 5 wt. %, the manganese of 0.45 wt. % and 1.0 wt. % is dilute
Soil obtains magnesium alloy fused mass；
（3）Temperature by magnesium alloy fused mass control at 710 DEG C stirs 10 min, and refining agent is added in whipping process and carries out essence
Refining；Refining finishes, and removes flux and dross on liquid level, then gently spread last layer coverture；Melting furnace temperature is maintained at 710
DEG C, refining agent is added and carries out double refining, 30 min of uniform stirring carries slag after refining, remove the flux on liquid level and float
Slag；
（4）Magnesium alloy fused mass standing is cooled to 660 DEG C, keeps the temperature 30 min；
（5）Sampling analysis, ingredient is qualified, casts to get finished product when magnesium alloy fused mass temperature is down to 630 DEG C.
Each performance parameter of case study on implementation such as following table：
Claims (3)
1. high-strength anti-flaming diecast magnesium alloy, which is characterized in that the component weight percentages of involved magnesium alloy are as follows：Al contains
It is 0.3-2.0 wt.%, Zn content be 0.05-0.90 wt.%, Y content is 0.10-0.50 that amount, which is 4-10 wt.%, Ca content,
Wt.%, Mn content are that 0.10-0.60 wt.%, La, Ce, Pr, Nd mischmetal content are that 0-1.0 wt.%, Fe contents are less than
0.003 wt.%, remaining is Mg and inevitable impurity element.
2. high-strength anti-flaming diecast magnesium alloy as described in claim 1, it is characterised in that quality hundred of the Ce in mischmetal
Point content is at least 55%.
3. the preparation method of high-strength anti-flaming diecast magnesium alloy is used to prepare high-strength anti-flaming pressure as claimed in claim 1 or 2
Cast magnesium alloy, it is characterised in that：
（1）Material prepares：Among metal magnesium ingot, Mg-Al intermediate alloys or Al ingots, Mg-Mn intermediate alloys or manganese metal, Mg-Ca
The raw material of alloy or metal Ca, Mg-Y intermediate alloy or metal Y, mischmetal as each element in magnesium alloy, by magnesium alloy
Component prescription range determines that the mass percent of ingredient weighs corresponding raw material；
（2）Shove charge is melted：The raw metal magnesium ingot weighed up to be put into and carries out melting in smelting furnace, smelting temperature is 650 ~ 700 DEG C,
Until magnesium ingot is completely melt；
（3）Add alloying element：Serum Magnesium is gradually heated up from 650 ~ 700 DEG C and is warming up to 710 ~ 750 DEG C, at this temperature by
Required intermediate alloy or metal is gradually added；
（4）Refining carries slag：Between controlling 710 ~ 750 DEG C of melt temperature, 10-20min is stirred, refining agent is added in whipping process
It is refined；After stand 20-30min, refining agent is added and carries out double refining, temperature is maintained at 710 ~ 750 DEG C, uniformly stirs
20-30min is mixed, slag is carried after refining, removes flux and dross on liquid level；
（5）Cool down static：Magnesium alloy fused mass standing is cooled to 630-690 DEG C, keeps the temperature 20-30min；
（6）Sampling analysis is cast：Sampling analysis, ingredient is qualified, and casting is got product.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022977A (en) * | 2018-10-20 | 2018-12-18 | 广州宇智科技有限公司 | A kind of the casting magnesium alloy and processing technology fire-retardant using liquid metal |
| CN109852856A (en) * | 2019-04-17 | 2019-06-07 | 上海交通大学 | A kind of high tough high-modulus metal mold gravity casting magnesium alloy and preparation method thereof |
| CN111500883A (en) * | 2020-04-24 | 2020-08-07 | 福建省南平铝业股份有限公司 | Method for reducing oxidation inclusion degree in aluminum alloy casting |
| CN112680644A (en) * | 2020-12-25 | 2021-04-20 | 山西瑞格金属新材料有限公司 | High-strength high-toughness magnesium alloy for ultrathin wall component and preparation method thereof |
| CN113278856A (en) * | 2021-05-24 | 2021-08-20 | 重庆理工大学 | AM50A die-cast magnesium alloy with excellent corrosion-resistant oxide film and preparation method thereof |
| WO2021179835A1 (en) * | 2020-03-10 | 2021-09-16 | 东莞宜安科技股份有限公司 | Flame-resistant magnesium alloy and preparation method therefor |
| CN113811629A (en) * | 2019-03-12 | 2021-12-17 | 本田技研工业株式会社 | Flame-retardant magnesium alloy and method for producing same |
| CN115066511A (en) * | 2019-12-18 | 2022-09-16 | 一般社团法人日本镁协会 | Flame-retardant high-toughness magnesium alloy |
| CN115449682A (en) * | 2022-09-28 | 2022-12-09 | 广东汇天航空航天科技有限公司 | Magnesium-based alloy compounded by rare earth and alkaline earth elements and preparation method thereof |
| WO2024011847A1 (en) * | 2022-07-11 | 2024-01-18 | 宝钢金属有限公司 | High-thermal-conductivity, flame retardant and deformable magnesium alloy material and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022977A (en) * | 2018-10-20 | 2018-12-18 | 广州宇智科技有限公司 | A kind of the casting magnesium alloy and processing technology fire-retardant using liquid metal |
| CN113811629A (en) * | 2019-03-12 | 2021-12-17 | 本田技研工业株式会社 | Flame-retardant magnesium alloy and method for producing same |
| CN109852856A (en) * | 2019-04-17 | 2019-06-07 | 上海交通大学 | A kind of high tough high-modulus metal mold gravity casting magnesium alloy and preparation method thereof |
| CN109852856B (en) * | 2019-04-17 | 2021-03-19 | 上海交通大学 | High-strength, high-toughness and high-modulus metal mold gravity casting magnesium alloy and preparation method thereof |
| CN115066511A (en) * | 2019-12-18 | 2022-09-16 | 一般社团法人日本镁协会 | Flame-retardant high-toughness magnesium alloy |
| CN115066511B (en) * | 2019-12-18 | 2024-02-20 | 一般社团法人日本镁协会 | Flame-retardant high-toughness magnesium alloy |
| WO2021179835A1 (en) * | 2020-03-10 | 2021-09-16 | 东莞宜安科技股份有限公司 | Flame-resistant magnesium alloy and preparation method therefor |
| CN111500883A (en) * | 2020-04-24 | 2020-08-07 | 福建省南平铝业股份有限公司 | Method for reducing oxidation inclusion degree in aluminum alloy casting |
| CN112680644A (en) * | 2020-12-25 | 2021-04-20 | 山西瑞格金属新材料有限公司 | High-strength high-toughness magnesium alloy for ultrathin wall component and preparation method thereof |
| CN113278856A (en) * | 2021-05-24 | 2021-08-20 | 重庆理工大学 | AM50A die-cast magnesium alloy with excellent corrosion-resistant oxide film and preparation method thereof |
| CN113278856B (en) * | 2021-05-24 | 2021-12-07 | 重庆理工大学 | AM50A die-cast magnesium alloy with excellent corrosion-resistant oxide film and preparation method thereof |
| WO2024011847A1 (en) * | 2022-07-11 | 2024-01-18 | 宝钢金属有限公司 | High-thermal-conductivity, flame retardant and deformable magnesium alloy material and preparation method therefor |
| CN115449682A (en) * | 2022-09-28 | 2022-12-09 | 广东汇天航空航天科技有限公司 | Magnesium-based alloy compounded by rare earth and alkaline earth elements and preparation method thereof |
| CN115449682B (en) * | 2022-09-28 | 2024-04-26 | 广东汇天航空航天科技有限公司 | Rare earth and alkaline earth element compounded magnesium-based alloy and preparation method thereof |
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