CN102676898A - Magnesium alloy modifier and preparation method thereof - Google Patents
Magnesium alloy modifier and preparation method thereof Download PDFInfo
- Publication number
- CN102676898A CN102676898A CN2012101573552A CN201210157355A CN102676898A CN 102676898 A CN102676898 A CN 102676898A CN 2012101573552 A CN2012101573552 A CN 2012101573552A CN 201210157355 A CN201210157355 A CN 201210157355A CN 102676898 A CN102676898 A CN 102676898A
- Authority
- CN
- China
- Prior art keywords
- magnesium
- magnesiumalloy
- alterant
- alloy
- weighing
- 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
Images
Abstract
The invention provides a magnesium silicon alloy eutectic silicon modifier which is prepared from the following materials in percentage by mass: 25-60% of metal zinc, 0.2-2% of metal manganese and 38-73% of primary magnesium. In the magnesium alloy modifier, the purity of the metal zinc is greater than or equal to 99.99%, the purity of the metal manganese is greater than or equal to 99.9%, and the purity of the primary magnesium ingot is greater than or equal to 99.95%. The preparation method of the magnesium alloy modifier comprises the following steps: heating to melt the primary magnesium ingot in a protective atmosphere, adding the metal zinc and the metal manganese, melting the metal zinc and the metal manganese, uniformly stirring, casting and forming to obtain the magnesium alloy modifier. The magnesium alloy modifier provided by the invention does not have burning loss, does not generate harmful gas, does not influence the corrosion resistance of the magnesium alloy, has the advantages of low cost and uniform distribution in the alloy, and can obviously refine the Mg2Si phase, thereby enhancing the as-cast mechanical properties (especially percentage of elongation) of the magnesium silicon alloy. The invention solves the problem of low as-cast mechanical properties (especially low percentage of elongation) in the hypoeutectic magnesium silicon alloy due to the crude eutectic Mg2Si phase in the existing magnesium silicon alloy.
Description
Technical field
The invention belongs to the metallic substance technical field, relate to a kind of magnesiumalloy and smelt, be specifically related to a kind of mg-si master alloy Eutectic Silicon in Al-Si Cast Alloys alterant and preparation method thereof.
Background technology
Therefore magnesiumalloy can be widely used in the fields such as aerospace, automobile, machinery, electronics, computingmachine owing to have high specific tenacity, specific rigidity, to reach the purpose that reduces construction weight.Because wild phase Mg
2Si has HMP (1085 ℃), low density 1.99 * 10 mutually
3Kgm
-3, high firmness 4.5 * 10
9Nm
-2With low-expansion coefficient 7.5 * 10-6K
-1, mg-si master alloy (Mg-Si) is used magnesiumalloy as high temperature and is demonstrated the potential using value.But the Chinese character-shaped Mg of mg-si master alloy
2Si has not only reduced the toughness of as cast condition Mg-Si alloy mutually, has also reduced the intensity of alloy, has limited its application.Change thick Mg
2The pattern of Si phase is to improve one of effective means of mg-si master alloy toughness, can change Mg through adding alloy element
2Si phase pattern is promptly to Mg
2The rotten processing of Si phase.Having data to show can reach Mg through adding following alloying element
2The effect that Si is rotten mutually.
(1) metallic element yttrium (Y) element is rotten, adds metallic yttrium (Y) element, and surpassing the 0.8wt%Y element is to change nascent Mg
2Si and Chinese character-shaped Mg
2The Si phase, but when addition surpasses 1.2wt%, nascent Mg
2The alligatoring again that Si becomes.
(2) metal Sb element is rotten, adds Sb element crystal grain thinning and change Mg effectively
2The pattern of Si phase, improve the intensity of Mg-Al-Si alloy, but but can reduce the unit elongation of alloy.
(3) metal Bi element is rotten, adds the 0.5wt%Bi Mg that can come into being
2Si surpasses the nascent Mg of 0.8wt% but work as addition
2Si alligatoring again mutually, and to eutectic Mg
2Si is not effect mutually.
(4) metal La element is rotten.Add metal La, to nascent Mg
2Si has effect mutually, but to eutectic Mg
2Si is not effect mutually.
Existing in a word mg-si master alloy alterant all exists owing to can produce thick eutectic Mg
2Si causes hypoeutectic mg-si master alloy as cast condition mechanical property low mutually, and particularly the lower problem of elongation has influence on being widely used of mg-si master alloy.
Summary of the invention
The purpose of this invention is to provide a kind of mg-si master alloy Eutectic Silicon in Al-Si Cast Alloys alterant, in order to solve in the existing mg-si master alloy, because thick eutectic Mg
2Si causes the lower problem of hypoeutectic mg-si master alloy as cast condition mechanical property, particularly elongation mutually, and having solved to exist in the prior art does not have sophisticated mg-si master alloy eutectic Mg
2Si phase alterant problem.
The technical scheme that the present invention adopted is, a kind of magnesiumalloy alterant, by mass percentage, the consisting of of its material: 25～60% metallic zinc, 0.2～2% manganese metal and 38～73% primary magnesium.
Magnesiumalloy alterant of the present invention, its characteristic also be,
The magnesiumalloy alterant by mass percentage, the consisting of of its material: 45～55% metallic zinc, 0.2～2% manganese metal and 43～53% primary magnesium.
The purity of said metallic zinc is >=99.99%, and the purity of manganese metal is >=99.9%, and the purity of primary magnesium ingot is >=99.95%.
The present invention also provides the preparation method of mg-si master alloy alterant, and this method is carried out according to the following steps:
Step 1 takes by weighing 25～60% metallic zinc, 0.2～2% manganese metal, 38～73% primary magnesium at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 800～900 ° of C under atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 60～120 minutes, stirs 10～40 minutes, is cooled to 690～770 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 10～40 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
The preparation method of magnesiumalloy alterant according to the invention, its characteristic also be,
The protective atmosphere of said step 2 is SF6/CO2, and its volume ratio is the SF6 of 1:99 and the gas mixture of CO2, protective atmosphere or be SF6/N2, and its volume ratio is SF6 and the N2 gas mixture of 1:99.
Beneficial effect of the present invention: after joining magnesiumalloy alterant of the present invention in the mg-si master alloy melt, the zinc element in the magnesiumalloy alterant can be dissolved in the alloy melt fully, and after stirring, zinc element is distributed in the melt equably.In solidifying subsequently, because the temperature of Mg-Zn eutectic reaction well below the temperature of Mg～Si eutectic reaction, therefore forms Mg in Mg-～Si alloy generation eutectic reaction
2The Si phase time, the zinc element in the alloy can be distributed in the solid-liquid interface of solidified front, produces enrichment, has hindered Mg
2The growth of Si phase has reached change Mg just because of the enrichment of this zinc element in process of setting
2The purpose of Si phase, promptly rotten effect.
Zinc element is the another kind of very effective alloy element except that aluminium element in the magnesiumalloy; Dual function with solution strengthening and ageing strengthening; Can improve the intensity of magnesiumalloy significantly; And can alleviate because of there are the corrosive nature that causes in iron, nickel, can suitably improve the corrosion resisting property of magnesiumalloy.Become in the magnesiumalloy most important alloy element except aluminium element.
Manganese still can improve ys a little to the almost not influence of tensile strength of magnesiumalloy.Manganese can also avoid producing the resistance to corrosion that deleterious intermetallic compound improves magnesiumalloy through removing de-iron and other heavy metal elements.The solid solubility of manganese in magnesiumalloy is very low, the most specifically manganese element not with magnesiumalloy in Si, elements such as Zn form compound, therefore, in the process of solidifying, also can separate out at Mg
2The forward position of Si phase hinders its growth, thus refinement Mg
2The pattern of Si phase.
Description of drawings
Fig. 1 is the metallographic structure opticmicroscope figure of uninoculated hypoeutectic Mg-Si alloy;
Fig. 2 is the metallographic structure opticmicroscope figure of the Mg-Si alloy after the magnesiumalloy alterant refinement of embodiment one;
Fig. 3 is the metallographic structure opticmicroscope figure of the hypoeutectic Mg-Si alloy after the magnesiumalloy alterant refinement of embodiment two;
Fig. 4 is the metallographic structure opticmicroscope figure of hypoeutectic Mg-Si alloy of the magnesiumalloy alterant refinement of embodiment three;
Fig. 5 is the metallographic structure opticmicroscope figure of hypoeutectic Mg-Si alloy of the magnesiumalloy alterant refinement of embodiment four.
Embodiment
In conjunction with accompanying drawing and embodiment the present invention is elaborated.
A kind of magnesiumalloy alterant, by mass percentage, the consisting of of its material: 25～60% metallic zinc, 0.2～2% manganese metal and 38～73% primary magnesium.
The present invention is preferred, the magnesiumalloy alterant by mass percentage, the consisting of of its material: 45～55% metallic zinc, 0.2～2% manganese metal and 43～53% primary magnesium.
Magnesiumalloy alterant of the present invention, the purity of said metallic zinc are >=99.99%, and the purity of manganese metal is >=99.9%, and the purity of primary magnesium ingot is >=99.95%.
The preparation method of a kind of magnesiumalloy alterant of the present invention, this method is carried out according to the following steps:
Step 1 takes by weighing 25～60% metallic zinc, 0.2～2% manganese metal, 38～73% primary magnesium at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 800-900 ° of C under atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 60～120 minutes, stirs 10～40 minutes, is cooled to 690～770 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 10～40 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
In the preparation method of magnesiumalloy alterant of the present invention, the protective atmosphere of step 2 is SF6/CO2, and its volume ratio is the SF6 of 1:99 and the gas mixture of CO2, the protective atmosphere of step 2 or be SF6/N2, and its volume ratio is SF6 and the N2 gas mixture of 1:99.
Embodiment
Embodiment one:
Step 1 takes by weighing 28% metallic zinc, 0.5% manganese metal, 71.5% primary magnesium at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 800 ° of C under the SF6/CO2 atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 100 minutes, stirs 35 minutes, is cooled to 690 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 10 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
With the alterant of method for preparing, join in the mg-si master alloy that contains weight percentage 0.8%Si, wherein, the weight percentage that alterant accounts for magnesiumalloy is 1.8%, pours in the metal mold mold, forms the cast sample.Get the Mg-Si alloy that adds after the alterant, carry out the detection of metallurgical analysis and mechanical property.Metallographic structure is as shown in Figure 2, and mechanical property is seen shown in the table 1.
Embodiment two:
Step 1 takes by weighing 58% metallic zinc, 2% manganese metal, 40% primary magnesium at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 850 ° of C under the SF6/N2 atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 100 minutes, stirs 25 minutes, is cooled to 750 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 25 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
With the alterant of method for preparing, join in the mg-si master alloy that contains weight percentage 0.8%Si, wherein, the weight percentage that alterant accounts for magnesiumalloy is 2.0%, pours in the metal mold mold, forms the cast sample.Get the Mg-Si alloy that adds after the alterant, carry out the detection of metallurgical analysis and mechanical property.Metallographic structure is as shown in Figure 3, and mechanical property is seen shown in the table 1.
Embodiment three:
Step 1 takes by weighing 50% metallic zinc, 2% manganese metal, 48% primary magnesium at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 900 ° of C under the SF6/CO2 atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 90 minutes, stirs 30 minutes, is cooled to 700 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 20 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
With the alterant of method for preparing, join in the mg-si master alloy that contains weight percentage 0.8%Si, wherein, the weight percentage that alterant accounts for magnesiumalloy is 1.0%, pours in the metal mold mold, forms the cast sample.Get the Mg-Si alloy that adds after the alterant, carry out the detection of metallurgical analysis and mechanical property.Metallographic structure is as shown in Figure 4, and mechanical property is seen shown in the table 1.
Embodiment four:
Step 1 takes by weighing 45% metallic zinc, 1% manganese metal, 54% primary magnesium at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 860 ° of C under the SF6/N2 atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 100 minutes, stirs 30 minutes, is cooled to 720 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 40 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
With the alterant of method for preparing, join in the mg-si master alloy that contains weight percentage 0.8%Si, wherein, the weight percentage that alterant accounts for magnesiumalloy is 2.0%, pours in the metal mold mold, forms the cast sample.Get the Mg-Si alloy that adds after the alterant, carry out the detection of metallurgical analysis and mechanical property.Metallographic structure is as shown in Figure 5, and mechanical property is seen shown in the table 1.
Embodiment five:
Step 1 takes by weighing 35% metallic zinc, 1.5% manganese metal, the primary magnesium of 63..5% at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 850 ° of C under the SF6/CO2 atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 110 minutes, stirs 35 minutes, is cooled to 7300 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 10 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
With the alterant of method for preparing, join in the mg-si master alloy that contains weight percentage 0.8%Si, wherein, the weight percentage that alterant accounts for magnesiumalloy is 2.0%, pours in the metal mold mold, forms the cast sample.Get the Mg-Si alloy that adds after the alterant, carry out the detection of metallurgical analysis and mechanical property.Mechanical property is seen shown in the table 1.
It is consistent with the smelting temperature of conventional magnesiumalloy that the prepared magnesiumalloy alterant of the present invention adds temperature.In the rotten process of using of magnesiumalloy, the zinc element in the magnesiumalloy alterant is added in the magnesium alloy fused mass fully, does not produce impurity, gas; Utilize zinc element to come the processing of going bad of Eutectic Silicon in Al-Si Cast Alloys tissue to mg-si master alloy, reach refinement.Raw material in this magnesiumalloy alterant is metallic zinc and primary magnesium ingot, and with the alloy phase ratio, the raw materials cost of metallic zinc reduces than primary magnesium, make cost of the present invention relatively low, and the magnesiumalloy alterant is evenly distributed segregation-free in magnesiumalloy; Magnesiumalloy alterant of the present invention mainly is to be applicable to mg-si master alloy, is particularly suitable for the hypoeutectic mg-si master alloy; Zinc element in the fining agent can not produce deposition in fusion process; Modification effect does not exist ageing; And zinc element can not only play the effect to eutectic Si refinement, and can play the purpose of alloying, improved the mechanical property of magnesiumalloy; Tensile strength improves 10～30%, and elongation improves 50～140%.
With above-mentioned embodiment obtain the magnesiumalloy alterant; In the process of magnesium alloy smelting, add; The metallographic structure opticmicroscope figure of the hypoeutectic Mg-Si alloy after the refinement shown in Fig. 2～5, record behind each embodiment magnesium alloy refining physical strength as shown in the table:
Table 1 has used the magnesiumalloy test data table of embodiment of the invention magnesiumalloy alterant
Above-mentioned embodiment is an instance of the present invention, is not to be used for limiting enforcement of the present invention and interest field, and all equivalences of making according to the described content of patent protection scope of the present invention change and modify, and all should be included in the claim of the present invention.
Claims (5)
1. magnesiumalloy alterant, by mass percentage, the consisting of of its material: 25～60% metallic zinc, 0.2～2% manganese metal and 38～73% primary magnesium.
2. magnesiumalloy alterant according to claim 1 is characterized in that, the magnesiumalloy alterant by mass percentage, the consisting of of its material: 45～55% metallic zinc, 0.2～2% manganese metal and 43～53% primary magnesium.
3. magnesiumalloy alterant according to claim 1 is characterized in that, the purity of said metallic zinc is >=99.99%, and the purity of manganese metal is >=99.9%, and the purity of primary magnesium ingot is >=99.95%.
4. the preparation method of a magnesiumalloy alterant, this method is carried out according to the following steps:
Step 1 takes by weighing 25～60% metallic zinc, 0.2～2% manganese metal, 38～73% primary magnesium at first by mass percentage;
Step 2 joins the primary magnesium that takes by weighing in the smelting furnace, heat fused and be warming up to 800～900 ° of C under atmosphere protection;
Step 3 joins the manganese metal that takes by weighing in the magnesium liquid of smelting furnace fusing again, is incubated 60～120 minutes, stirs 10～40 minutes, is cooled to 690～770 ° of C then;
Step 4 joins step 3 with the metallic zinc that takes by weighing at last and adds in the magnesium liquid of manganese metal, is incubated and stirs 10～40 minutes, and the casting of coming out of the stove promptly gets magnesiumalloy alterant material.
5. according to the preparation method of the said magnesiumalloy alterant of claim 4; It is characterized in that the protective atmosphere of said step 2 is SF6/CO2, its volume ratio is the SF6 of 1:99 and the gas mixture of CO2; Protective atmosphere or be SF6/N2, its volume ratio is SF6 and the N2 gas mixture of 1:99.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101573552A CN102676898A (en) | 2012-05-18 | 2012-05-18 | Magnesium alloy modifier and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101573552A CN102676898A (en) | 2012-05-18 | 2012-05-18 | Magnesium alloy modifier and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102676898A true CN102676898A (en) | 2012-09-19 |
Family
ID=46809439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101573552A Pending CN102676898A (en) | 2012-05-18 | 2012-05-18 | Magnesium alloy modifier and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102676898A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1975376A (en) * | 1933-02-14 | 1934-10-02 | American Magnesium Metals Corp | Alloy |
| GB1149501A (en) * | 1966-05-10 | 1969-04-23 | Birmetals Ltd | Magnesium alloy |
| CN101812607A (en) * | 2010-04-22 | 2010-08-25 | 东北轻合金有限责任公司 | Magnesium alloy refiner and preparation method thereof |
-
2012
- 2012-05-18 CN CN2012101573552A patent/CN102676898A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1975376A (en) * | 1933-02-14 | 1934-10-02 | American Magnesium Metals Corp | Alloy |
| GB1149501A (en) * | 1966-05-10 | 1969-04-23 | Birmetals Ltd | Magnesium alloy |
| CN101812607A (en) * | 2010-04-22 | 2010-08-25 | 东北轻合金有限责任公司 | Magnesium alloy refiner and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 黄晓锋等: "主要合金元素在镁合金中的作用", 《铸造技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113061787A (en) | High-strength high-toughness Al-Si-Cu-Mg-Cr-Mn-Ti series casting alloy and preparation method thereof | |
| CN105088033A (en) | Aluminium alloy and preparation method thereof | |
| CN101812607B (en) | Magnesium alloy refiner and preparation method thereof | |
| CN110643862A (en) | Aluminum alloy for new energy automobile battery shell and pressure casting preparation method thereof | |
| CN102618758A (en) | Cast magnesium alloy of low linear shrinkage | |
| CN108300884B (en) | A kind of hypoeutectic Al-Mg2The rotten and thinning method of Si alloy | |
| US9937554B2 (en) | Grain refiner for magnesium and magnesium alloys and method for producing the same | |
| JP5137049B2 (en) | Magnesium alloy chip and method for producing molded article using the same | |
| WO2011090451A1 (en) | CASTING ALLOY OF THE AIMgSI TYPE | |
| JP6229130B2 (en) | Cast aluminum alloy and casting using the same | |
| CN102618757A (en) | Heat-resistant magnesium alloy | |
| CN112410592B (en) | Preparation method of aluminum alloy welding material cast ingot | |
| CN102994835A (en) | Heatproof magnesium alloy | |
| CN103589903A (en) | High-strength and wear-resistant copper alloy and preparation method thereof | |
| CN102618762A (en) | Heat-resisting magnesium alloy | |
| CN113862531A (en) | Aluminum alloy and preparation method thereof | |
| CN113774259A (en) | Al-Cu-Mg alloy and method for eliminating harmful iron-containing phase | |
| CN103589926A (en) | Hot-extruded magnesium alloy and preparation method thereof | |
| WO2014026446A1 (en) | Alloy for magnesium and magnesium alloy grain refinement, and preparation method thereof | |
| CN103305732A (en) | Method for preparing rare-earth yttrium containing super-high-strength wrought aluminium alloy | |
| CN106048332A (en) | Aluminum alloy material used for aerospace thin wall castings, and preparation method of material | |
| CN102994847A (en) | Heatproof magnesium alloy | |
| CN103502494A (en) | Mg-al-ca-based master alloy for mg alloys, and a production method therefor | |
| CN103305737B (en) | Grain refinement type cast magnesium alloy and preparation method thereof | |
| EP2476764B1 (en) | Preparation method of al-zr-c master alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |