CN108559897A - A kind of high-strength corrosion-resisting magnesium alloy and preparation method thereof - Google Patents
A kind of high-strength corrosion-resisting magnesium alloy and preparation method thereof Download PDFInfo
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- CN108559897A CN108559897A CN201810516606.9A CN201810516606A CN108559897A CN 108559897 A CN108559897 A CN 108559897A CN 201810516606 A CN201810516606 A CN 201810516606A CN 108559897 A CN108559897 A CN 108559897A
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- magnesium alloy
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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
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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Abstract
The invention belongs to technical field of metal material, and in particular to a kind of high-strength corrosion-resisting magnesium alloy and preparation method thereof.The high-strength corrosion-resisting magnesium alloy is prepared by raw material components as follows by mass percentage：7.0~7.5%Sn, 0.2~0.6%Bi, 0.1~0.3%Sb, surplus are Mg and inevitable impurity.The present invention is above-mentioned by the component magnesium of high-strength corrosion-resisting magnesium alloy, tin, bismuth and antimony melting and casting, obtains cast alloy；Then cast alloy is heat-treated, obtains high-strength corrosion-resisting magnesium alloy.There is the high-strength corrosion-resisting magnesium alloy good room temperature intensity and corrosion resistance, room temperature tensile intensity to be higher than 270MPa, and the corrosion rate in 3.5wt%NaCl solution is less than 0.6mm/a.Compared with commercial Mg alloy AZ91, there is higher intensity and better corrosion resistance, had broad application prospects in the fields such as electronic product.
Description
Technical field
The invention belongs to technical field of metal material, and in particular to a kind of high-strength corrosion-resisting magnesium alloy and its preparation side
Method.
Background technology
Magnesium alloy have density is small, specific strength is high, electromagnetic shielding and damping capacity is good and dimensionally stable, it is cheap,
The advantages that easy to be recycled, is known as " green engineering material of 21 century most development potentiality and future ", in many fields,
Especially in terms of electronic product (such as laptop, digital camera, mobile phone) shell, have other materials incomparable
Advantage.
Although occurring the magnesium alloy of some better performances in succession, general all rare earth elements containing higher price,
Cause the cost of alloy excessively high, using being restricted.Mg-Al systems alloy is important commercial low-cost magnesium alloy system, and AZ91 is just
It is one of the typical trade mark for wherein obtaining commercial applications.Due to having netted Mg in AZ91 alloys17Al12The presence of phase, both influenced
Intensity promotes to corrode again, bad so as to cause the intensity and corrosion resistance of the alloy, seriously hinders it in electronic product
Using.
In order to solve this problem, low-cost magnesium alloy system of the exploitation without Al just becomes important research topic.Rare earth
Significant effect after (such as Y, Nd) is added, but rare earth element higher price.Alkaline earth element (such as Ca) is mostly added in the form of intermediate alloy
Enter, production cost is higher.Other elements in addition to rare earth and alkaline earth element, such as Sn can be with simple metal since fusing point is less than magnesium
Form is added, and solubility is high in magnesium, and dystectic compound can be formed with magnesium, and can both simplify technique reduces production cost,
It again can crystal grain thinning improvement alloy property.Therefore, Mg-Sn systems alloy is important as develop low-cost and high-performance magnesium alloy one
Direction.
Invention content
For overcome the deficiencies in the prior art and disadvantage, the primary purpose of the present invention is that providing a kind of high-strength corrosion-resisting
Magnesium alloy, the high-strength corrosion-resisting magnesium alloy are Mg-Sn systems alloy, have excellent room temperature intensity and corrosion resistance, can expire
The requirement of the parts magnesium alloy materials such as sufficient electronic product casing, has broad application prospects in electronics field.
Another object of the present invention is to provide the preparation methods of above-mentioned high-strength corrosion-resisting magnesium alloy.
It is still another object of the present invention to provide the applications of above-mentioned high-strength corrosion-resisting magnesium alloy.
The purpose of the invention is achieved by the following technical solution：
A kind of high-strength corrosion-resisting magnesium alloy, is prepared by raw material components as follows by mass percentage：
7.0~7.5%Sn, 0.2~0.6%Bi, 0.1~0.3%Sb, surplus are Mg and inevitable impurity；
The preparation method of the high-strength corrosion-resisting magnesium alloy, comprises the following steps：
By the component magnesium of high-strength corrosion-resisting magnesium alloy, tin, bismuth and antimony melting and casting, cast alloy is obtained；It then will casting
State alloy is heat-treated, and high-strength corrosion-resisting magnesium alloy is obtained；
The magnesium, tin, bismuth and antimony purity be preferably not less than 99.5%；
The concrete operations of the melting and casting are preferably：
In CO2+SF6Mixed gas protected lower melting is cast to steel after melting sources when liquid magnesium alloy is warming up to 720 DEG C
In molding jig, cast alloy is obtained；
The melting preferably carries out in crucible and intermediate frequency furnace；
The crucible is preferably corundum crucible；
The heat treatment is preferably solution treatment and ageing treatment；
The condition of the solution treatment is preferably 500 DEG C of 2~4h of solution treatment；
The condition of the ageing treatment is preferably 225 DEG C of 14~18h of ageing treatment；
The high-strength corrosion-resisting magnesium alloy is in vehicle, aerospace, electronics, military affairs, communication, optical instrument and computer
Application in equal fields；
The principle of the present invention：
High-strength corrosion-resisting magnesium alloy provided by the invention is Mg-Sn systems alloy, alloy compositions Mg-Sn-Bi-Sb.
The present invention uses Sn for the first component, and solubility of the Sn in magnesium reaches as high as 14.85wt%, and with temperature
It reduces and reduces rapidly.Sn is combined with magnesium produces dystectic compound Mg2Sn phases improve alloy strength；Meanwhile these are changed
Closing object can be as the heterogeneous forming core core of magnesium matrix, to crystal grain thinning, improvement tissue, improves the intensity of alloy and corrosion-resistant
Performance.But Sn can excessively lead to Mg2Sn phases become thick, unfavorable to alloy property.To ensure casting, mechanics and the corrosion resistant of alloy
Corrosion energy, the addition of Sn is set to 7.0~7.5wt% in the present invention.
2nd, is added without rare earth and alkaline earth element, but fusing point is added to reduce cost of alloy and simplify production technology
Bi, Sb element close with magnesium.They are combined with magnesium generates dystectic compound Mg3Bi2、Mg3Sb2, improve alloy strength；
Mg is refined and stablized simultaneously2Sn phases improve tissue, further increase the intensity and corrosion resistance of alloy.In addition, Bi, Sb
Addition is it is possible to prevente effectively from Mg2Sn phases are reunited, and alloy mechanical property is improved.But Bi, Sb are excessively or proportioning is improper also can shadow
Alloy property is rung, therefore Bi, Sb addition of the present invention is set to 0.2~0.6wt%, 0.1~0.3wt% respectively.
The present invention comprehensively utilizes the advantageous effect of Sn, Bi, Sb, further increases the intensity and corrosion resistance of alloy.
The present invention has the following advantages and effects with respect to the prior art：
(1) high-strength corrosion-resisting magnesium alloy of the invention is through being dissolved and having after ageing treatment better than commercial Mg alloy AZ91
Room temperature intensity and corrosion resistance, room temperature tensile intensity be higher than 270MPa, the corrosion rate in 3.5wt%NaCl solution is low
In 0.6mm/a, the requirement of the parts magnesium alloy materials such as electronic product casing can be met, had in electronics field wide
Application prospect.
(2) high-strength corrosion-resisting magnesium alloy provided by the invention efficiently uses the synergistic effect of different elements, magnesium alloy
Intensity and excellent anti-corrosion performance.
(3) high-strength corrosion-resisting magnesium alloy provided by the invention is adding a small amount of Bi elements (being no more than 0.6wt%) and Sb
Synergistic effect, can be to avoid Mg2Sn phases are reunited, and alloy mechanical property is improved.
(4) preparation method of the present invention is simple, at low cost, is free of Al and rare earth element, is suitable for industrialized production.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
The raw material magnesium (Mg) arrived involved in the specific embodiment of the invention, tin (Sn), bismuth (Bi), antimony (Sb) are commercially available production
The purity of product, the raw material is 99.8%.
Embodiment 1
A kind of high-strength corrosion-resisting magnesium alloy, is prepared by raw material components as follows by mass percentage：
7.5%Sn, 0.2%Bi, 0.3%Sb, surplus are Mg and inevitable impurity.
The preparation method of the high-strength corrosion-resisting magnesium alloy, comprises the following steps：
By the component proportion of above-mentioned high-strength corrosion-resisting magnesium alloy, magnesium, tin, bismuth and antimony are placed in corundum crucible (by crucible
It is placed in induction furnace) in, in CO2+SF6Mixed gas protected lower melting, after melting sources when liquid magnesium alloy is warming up to 720 DEG C,
It is cast in steel die, obtains cast alloy, be then heat-treated：500 DEG C of solution treatment 4h, 225 DEG C of ageing treatments
18h obtains high-strength corrosion-resisting magnesium alloy.
Embodiment 2
A kind of high-strength corrosion-resisting magnesium alloy, is prepared by raw material components as follows by mass percentage：
7.2%Sn, 0.4%Bi, 0.2%Sb, surplus are Mg and inevitable impurity.
The preparation method of the high-strength corrosion-resisting magnesium alloy, comprises the following steps：
By the component proportion of above-mentioned high-strength corrosion-resisting magnesium alloy, magnesium, tin, bismuth and antimony are placed in corundum crucible (by crucible
It is placed in induction furnace) in, in CO2+SF6Mixed gas protected lower melting, after melting sources when liquid magnesium alloy is warming up to 720 DEG C,
It is cast in steel die, obtains cast alloy, be then heat-treated：500 DEG C of solution treatment 3h, 225 DEG C of ageing treatments
16h obtains high-strength corrosion-resisting magnesium alloy.
Embodiment 3
A kind of high-strength corrosion-resisting magnesium alloy, is prepared by raw material components as follows by mass percentage：
7.0%Sn, 0.6%Bi, 0.1%Sb, surplus are Mg and inevitable impurity.
The preparation method of the high-strength corrosion-resisting magnesium alloy, comprises the following steps：
By the component proportion of above-mentioned high-strength corrosion-resisting magnesium alloy, magnesium, tin, bismuth and antimony are placed in corundum crucible (by crucible
It is placed in induction furnace) in, in CO2+SF6Mixed gas protected lower melting, after melting sources when liquid magnesium alloy is warming up to 720 DEG C,
It is cast in steel die, obtains cast alloy, be then heat-treated：500 DEG C of solution treatment 2h, 225 DEG C of ageing treatments
14h obtains high-strength corrosion-resisting magnesium alloy.
Comparative example 1
A kind of magnesium alloy is prepared by raw material components as follows by mass percentage：
7.0%Sn, 0.1%Sb, surplus are Mg and inevitable impurity.
The preparation method of the magnesium alloy, with embodiment 3.
Comparative example 2
A kind of magnesium alloy is prepared by raw material components as follows by mass percentage：
7.0%Sn, 0.6%Bi, surplus are Mg and inevitable impurity.
The preparation method of the high-strength corrosion-resisting magnesium alloy, with embodiment 3.
Effect example
Magnesium made from the high-strength corrosion-resisting magnesium alloy and comparative example 1~2 that Examples 1 to 3 is prepared closes
Gold carries out tension test and corrosion test, and the specific method is as follows：
(1) stretching test method：GB6397-86 according to national standards《Metal stretching experimental sample》Processing criterion stretches magnesium
Alloy sample, cylinder sample gauge length size are Φ 6mm × 30mm, are drawn on Shimadzu AG-I 250kN electronic tensile test machines
It stretches, test temperature is room temperature (25 DEG C), rate of extension 1mm/min；Wherein, it compares as AZ91 alloys.
(2) corrosion tests：It is tested using room temperature (25 DEG C) immersion corrosion, corrosive medium is 3.5wt%NaCl solution.
Corrosion sample is disc-shaped magnesium alloy sample, and size is Φ 15mm × 3mm；Etching time is for 24 hours.The front and back magnesium of corrosion is measured to close
Golden sample is weightless, in conjunction with the surface area of magnesium alloy sample, calculates the year corrosion rate (unit of magnesium alloy sample：mm/a)；Wherein,
Control is AZ91 alloys.
Interpretation of result：
The tension test for the high-strength corrosion-resisting magnesium alloy that Examples 1 to 3 is prepared and corrosion test result such as 1 institute of table
Show, wherein compare as AZ91 alloys.As can be seen from the table, the high-strength corrosion-resisting magnesium alloy that Examples 1 to 3 is prepared
With excellent room temperature intensity and corrosion resistance, room temperature tensile intensity is higher than 270MPa, the corruption in 3.5wt%NaCl solution
It loses rate and is less than 0.6mm/a, be superior to commercial AZ91 alloys, the parts magnesium alloy materials such as electronic product casing can be met
It is required that being had broad application prospects in electronics field.And magnesium alloy either tension made from comparative example 1 and 2
Intensity or corrosion resistance are below the high-strength corrosion-resisting magnesium alloy that Examples 1 to 3 is prepared.
The tensile strength and corrosion rate for the high-strength corrosion-resisting magnesium alloy that 1 Examples 1 to 3 of table is prepared
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (9)
1. a kind of high-strength corrosion-resisting magnesium alloy, it is characterised in that be prepared by raw material components as follows by mass percentage
It arrives：
7.0~7.5%Sn, 0.2~0.6%Bi, 0.1~0.3%Sb, surplus are Mg and inevitable impurity.
2. the preparation method of high-strength corrosion-resisting magnesium alloy described in claim 1, it is characterised in that comprise the following steps：
By the component magnesium of high-strength corrosion-resisting magnesium alloy, tin, bismuth and antimony melting and casting, cast alloy is obtained；Then as cast condition is closed
Gold is heat-treated, and high-strength corrosion-resisting magnesium alloy is obtained.
3. the preparation method of high-strength corrosion-resisting magnesium alloy according to claim 1, it is characterised in that：
The magnesium, tin, bismuth and antimony purity be not less than 99.5%.
4. the preparation method of high-strength corrosion-resisting magnesium alloy according to claim 1, it is characterised in that：
The concrete operations of the melting and casting are：
In CO2+SF6Mixed gas protected lower melting is cast to steel die after melting sources when liquid magnesium alloy is warming up to 720 DEG C
In tool, cast alloy is obtained.
5. the preparation method of high-strength corrosion-resisting magnesium alloy according to claim 4, it is characterised in that：
The melting carries out in crucible and intermediate frequency furnace.
6. the preparation method of high-strength corrosion-resisting magnesium alloy according to claim 1, it is characterised in that：
The heat treatment is solution treatment and ageing treatment.
7. the preparation method of high-strength corrosion-resisting magnesium alloy according to claim 6, it is characterised in that：
The condition of the solution treatment is 500 DEG C of 2~4h of solution treatment.
8. the preparation method of high-strength corrosion-resisting magnesium alloy according to claim 6, it is characterised in that：
The condition of the ageing treatment is 225 DEG C of 14~18h of ageing treatment.
9. high-strength corrosion-resisting magnesium alloy described in claim 1 is in automobile, aerospace, electronics, military affairs, communication, optics instrument
Application in device and computer realm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810516606.9A CN108559897B (en) | 2018-05-25 | 2018-05-25 | A kind of high-strength corrosion-resisting magnesium alloy and preparation method thereof |
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| CN201810516606.9A CN108559897B (en) | 2018-05-25 | 2018-05-25 | A kind of high-strength corrosion-resisting magnesium alloy and preparation method thereof |
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| CN108559897A true CN108559897A (en) | 2018-09-21 |
| CN108559897B CN108559897B (en) | 2019-11-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230040063A (en) * | 2021-09-15 | 2023-03-22 | 울산과학기술원 | Age-hardenable magnesium alloy and method of manufacturing the same |
| CN116043082A (en) * | 2023-03-28 | 2023-05-02 | 有研工程技术研究院有限公司 | High-plasticity heat-resistant soluble magnesium alloy and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014231638A (en) * | 2013-04-30 | 2014-12-11 | 地方独立行政法人東京都立産業技術研究センター | Method of producing magnesium powder metallurgy sintered body, magnesium powder metallurgy sintered body and magnesium powder metallurgy material |
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2018
- 2018-05-25 CN CN201810516606.9A patent/CN108559897B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014231638A (en) * | 2013-04-30 | 2014-12-11 | 地方独立行政法人東京都立産業技術研究センター | Method of producing magnesium powder metallurgy sintered body, magnesium powder metallurgy sintered body and magnesium powder metallurgy material |
Non-Patent Citations (2)
| Title |
|---|
| M. KEYVANI, ET AL.: "Effect of Bi, Sb, and Ca additions on the hot hardness and microstructure of cast Mg-5Sn alloy", 《MATERIALS SCIENCE AND ENGINEERING A》 * |
| 张清 等: "Sb合金化在耐热镁合金中的应用", 《材料工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230040063A (en) * | 2021-09-15 | 2023-03-22 | 울산과학기술원 | Age-hardenable magnesium alloy and method of manufacturing the same |
| KR102568957B1 (en) * | 2021-09-15 | 2023-08-18 | 울산과학기술원 | Age-hardenable magnesium alloy and method of manufacturing the same |
| CN116043082A (en) * | 2023-03-28 | 2023-05-02 | 有研工程技术研究院有限公司 | High-plasticity heat-resistant soluble magnesium alloy and preparation method thereof |
| CN116043082B (en) * | 2023-03-28 | 2023-06-06 | 有研工程技术研究院有限公司 | High-plasticity heat-resistant soluble magnesium alloy and preparation method thereof |
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| CN108559897B (en) | 2019-11-26 |
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