CN1982488A - High-toughness and heat-resisting magnesium-alloy and its melting method - Google Patents
High-toughness and heat-resisting magnesium-alloy and its melting method Download PDFInfo
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- CN1982488A CN1982488A CN 200510130470 CN200510130470A CN1982488A CN 1982488 A CN1982488 A CN 1982488A CN 200510130470 CN200510130470 CN 200510130470 CN 200510130470 A CN200510130470 A CN 200510130470A CN 1982488 A CN1982488 A CN 1982488A
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Abstract
A high-toughness and heat-resisting magnesium alloy and its smelting method are disclosed. The magnesium alloy consists of Y 8-16wt% and Mg residue. The process is carried out by preparing materials, raising temperature for preheat furnace and smelting furnace, inducing protective gas into smelting furnace, preheating pure magnesium ingot and pure Y ingot, smelting preheated pure magnesium ingot in batch under gas protection, adding preheated Y ingot into charging basket, dipping it into magnesium solution to smelt, controlling magnesium solution temperature between 720-860degree, keeping temperature for 10-60mins after dissolving Y element, distributing alloy element Y into magnesium solution homogeneously, cast molding magnesium alloy solution into cast ingot or casting, continuous or semi-continuous casting, or extrude casting or press casting. It has excellent high-temperature anti-creeping and mechanical performances and better toughness. It can be recovered and reutilized.
Description
Technical field
The present invention relates to a kind of heat resistance magnesium alloy and melting method thereof of high tenacity.The category that belongs to industrial magnesium alloy.
Background technology
At present, along with energy-conserving and environment-protective and automotive performance promote improving constantly of requiring, magnesium alloy is because little, the specific tenacity specific rigidity height of density, good casting property, especially be easy to die cast, remove this and also have good damping property and be easy to advantage such as recovery, present flourish gesture in the application of automotive industry.The continuous expansion of on automobile, using along with magnesium alloy, component are to the structural part and the functional part development of critical positions such as engine support, piston, wheel hub as from original gear box casing, panel board, car door etc., people also satisfy the various different magnesium alloy that require in exploitation, as high-strength and high ductility heat resistance magnesium alloy, high temperature and creep resistance corrosion-resistant magnesium alloy etc.
Traditional magnesium alloy such as AZ91D, AM60B, AS41, AE42 etc. have obtained to use widely, still are several magnesium alloy of present application quantity maximum.But these alloys all have some shortcoming, for example the intensity in temperature more than 250 ℃ very low (≤100MPa), corrosion resistance is poor, creep-resistant property low (AZ91D, AM60B).Restricting the application of magnesium alloy on vitals such as engine.Ubiquitous another problem of present magnesium alloy is that the alloy constituent element is more, may react between the alloy constituent element to generate the intermetallic compound that is insoluble to the magnesium alloy liquation, has increased the difficulty that magnesium alloy is recycled, and has reduced recovery rate.
Summary of the invention
The heat resistance magnesium alloy that the purpose of this invention is to provide a kind of high tenacity.It can satisfy the requirement of higher mechanical property and high-temperature creep resistance, has fracture toughness property and the corrosion resistance more much higher than existing magnesium alloy, has only 1 alloy constituent element simultaneously, is convenient to recycle.
Another object of the present invention provides a kind of melting method of heat resistance magnesium alloy of high tenacity.
For achieving the above object, the present invention takes following technical scheme:
A kind of heat resistance magnesium alloy of high tenacity, the component content of this magnesium alloy is: the content of Y is 8～16wt%, all the other are Mg.
In the heat resistance magnesium alloy of high tenacity of the present invention, the optimum content of described Y is 9～13wt%.
The melting method of the described magnesium alloy of a kind of claim 1, this method comprises the steps:
(1), gets the raw materials ready by the weight percent of the composition of magnesium alloy of the present invention;
(2), preheating oven is warmed up to 160～660 ℃, and smelting furnace is warmed up to 500～800 ℃, and feeds shielding gas to smelting furnace;
(3), in preheating oven, pure magnesium ingot is preheating to 100～600 ℃, simultaneously pure Y ingot is preheating to 100～500 ℃;
(4), in the smelting furnace of preheating, carry out the melting of pure magnesium ingot, the preheating pure magnesium ingot that at first will account for the fusing weight 1/2～1/20 of 1 smelting furnace adds in the smelting furnace, make its fusing fully under the protection of shielding gas, join remaining preheating pure magnesium ingot in the smelting furnace then in batches, after a collection of preheating pure magnesium ingot melts before treating, add the next batch preheated magnesium ingot again, every batch of add-on is submerged in the magnesium melt fully with pure magnesium ingot and is as the criterion; So repeat, reach preset value, after the fusing, the scum silica frost of molten surface is cleaned out fully, temperature is controlled at 680～860 ℃ until the pure magnesium ingot add-on;
(5), the pure Y ingot after the preheating is submerged in the magnesium melt together with the charging basket that adds that holds the Y ingot, adding charging basket is that soft steel or high chromium steel are made, and is thick with a large amount of apertures on it, is convenient to dissolving and the diffusion of Y;
(6), the magnesium melt temperature is controlled at 720～860 ℃, treat that Y dissolves fully after, 750～860 ℃ of insulations 10～60 minutes, alloying element Y is evenly distributed in the magnesium melt again;
(7), last, the magnesium alloy liquation is poured in the permanent mold casting mould of abundant preheating or the sand mold casting mould is frozen into ingot casting or foundry goods; Perhaps the magnesium alloy liquation is transported in the crystallizer, carries out continuously or semicontinuous casting; Perhaps the magnesium alloy liquation is poured in extrusion casting machine or the pressure die-casting machine in batches extrusion casting or be cast into foundry goods according to casting weight.
In described step (5), described adding, be thick with a large amount of apertures on the charging basket, that is to say that adding the aperture that is thick with on the charging basket is sieve-like.
In the melting method of magnesium alloy of the present invention, described shielding gas is preferably and contains 0.2～0.5 volume %SF
6N
2Be designated hereinafter simply as shielding gas (0.2～0.5%SF
6+ N
2).
Advantage of the present invention is: magnesium alloy of the present invention can satisfy the requirement of higher mechanical property and high-temperature creep resistance, has the corrosion resistance more much higher than existing magnesium alloy, has only 1 alloy constituent element simultaneously, is convenient to recycle.
Embodiment
Embodiment 1:1000 kilogram Mg-10Y magnesium alloy (component content of Mg-10Y magnesium alloy is: the content of Y is 10 weight %, and all the other are Mg) melting method.
1, melting is prepared
Connect the power supply of preheating oven, smelting furnace, heat up.Preheating oven is warmed up to 420～460 ℃, smelting furnace is warmed up to 600～620 ℃, in smelting furnace, feed shielding gas (0.2～0.5%SF
6+ N
2).
2, pure magnesium ingot and the preheating of pure Y ingot
Adopt preheating oven that 910 kilograms of pure magnesium ingots and 102 kilograms of pure Y ingots of surface cleaning are preheating to 260～360 ℃, wherein pure Y ingot is contained in Y and adds in the charging basket, puts into the preheating oven preheating together with adding charging basket.Add charging basket and adopt the thick Cr13 steel plate of 3mm to be processed into, on steel plate, get out the aperture of a large amount of Φ 5mm, make it into sieve-like.
3, pure magnesium ingot fusing
The pure magnesium ingot that at first adds 80～90 kilograms of surface cleanings makes it in aforementioned mixed gas protected fusing fully down, and the pure magnesium ingot that in batches will be preheating to design temperature then joins in the smelting furnace.Add about 25～40 kilograms the 1st time, concrete add-on is submerged in fully in the magnesium liquid with magnesium ingot and is as the criterion; Add the 2nd batch of preheated magnesium ingot until completely melted again, add-on still is submerged in fully in the magnesium liquid with magnesium ingot and is as the criterion; So repeatedly, reach 910 kilograms of preset values, after the fusing, the scum silica frost of molten surface is cleaned out fully, temperature is controlled at 760～780 ℃ with the spoon of skimming until the magnesium ingot add-on.
4, alloying
Pure Y ingot after the preheating is submerged in the magnesium melt together with the charging basket that adds that holds the Y ingot, the magnesium melt temperature is controlled at 780～790 ℃, treat that Y dissolves fully after, under this temperature, be incubated 30～40 minutes again, alloying element Y is evenly distributed in the magnesium melt;
5, cast
With the melt transfer pump magnesium alloy liquation is poured in the permanent mold casting mould of abundant preheating and is frozen into ingot casting.So far melting finishes.
Room temperature tension set δ 〉=14% of Mg-10Y magnesium alloy of the present invention, tensile strength sigma
bBe 275～285MPa, yield strength σ
0.2Be 215～225Mpa; Tensile strength sigma in the time of 250 ℃
b〉=255MPa.
Embodiment 2:1000 kilogram Mg-8.2Y magnesium alloy (component content of Mg-8.2Y magnesium alloy is: the content of Y is 8.2 weight %, and all the other are Mg) melting method.
1, melting is prepared
Connect the power supply of preheating oven, smelting furnace, heat up.Preheating oven is warmed up to 420～460 ℃, smelting furnace is warmed up to 600～620 ℃, in smelting furnace, feed shielding gas (0.2～0.5%SF
6+ N
2).
2, pure magnesium ingot and the preheating of pure Y ingot
Adopt preheating oven that 930 kilograms of pure magnesium ingots and 83 kilograms of pure Y ingots of surface cleaning are preheating to 260～360 ℃, wherein pure Y ingot is contained in Y and adds in the charging basket, puts into the preheating oven preheating together with adding charging basket.Add charging basket and adopt the thick Cr13 steel plate of 3mm to be processed into, on steel plate, get out the aperture of a large amount of Φ 5mm, make it into sieve-like.
3, pure magnesium ingot fusing
The pure magnesium ingot that at first adds 80～90 kilograms of surface cleanings makes it in aforementioned mixed gas protected fusing fully down, and the pure magnesium ingot that in batches will be preheating to design temperature then joins in the smelting furnace.Add about 25～40 kilograms the 1st time, concrete add-on is submerged in fully in the magnesium liquid with magnesium ingot and is as the criterion; Add the 2nd batch of preheated magnesium ingot until completely melted again, add-on still is submerged in fully in the magnesium liquid with magnesium ingot and is as the criterion; So repeatedly, reach 930 kilograms of preset values, after the fusing, the scum silica frost of molten surface is cleaned out fully, temperature is controlled at 760～780 ℃ with the spoon of skimming until the magnesium ingot add-on.
4, alloying
Pure Y ingot after the preheating is submerged in the magnesium melt together with the charging basket that adds that holds the Y ingot, the magnesium melt temperature is controlled at 780～790 ℃, treat that Y dissolves fully after, under this temperature, be incubated 25～35 minutes again, alloying element Y is evenly distributed in the magnesium melt;
5, cast
With the melt transfer pump magnesium alloy liquation is transported in the crystallizer, carries out semicontinuous casting, be prepared into the billet that press working is used.
After the Mg-8.2Y magnesium alloy process of the present invention extrusion molding, its room temperature tension set δ 〉=18%, tensile strength sigma
bBe 285～295MPa, yield strength σ
0.2Be 215～225Mpa; Tensile strength sigma in the time of 250 ℃
b〉=240MPa.
Embodiment 3:1000 kilogram Mg-15Y magnesium alloy (component content of Mg-15Y magnesium alloy is: the content of Y is 15 weight %, and all the other are Mg) melting method.
1, melting is prepared
Connect the power supply of preheating oven, smelting furnace, heat up.Preheating oven is warmed up to 420～460 ℃, smelting furnace is warmed up to 600～620 ℃, in smelting furnace, feed shielding gas (0.2～0.5%SF
6+ N
2).
2, pure magnesium ingot and the preheating of pure Y ingot
Adopt preheating oven that 860 kilograms of pure magnesium ingots and 152 kilograms of pure Y ingots of surface cleaning are preheating to 260～360 ℃, wherein pure Y ingot is contained in Y and adds in the charging basket, puts into the preheating oven preheating together with adding charging basket.Add charging basket and adopt the thick Cr13 steel plate of 3mm to be processed into, on steel plate, get out the aperture of a large amount of Φ 5mm, make it into sieve-like.
3, pure magnesium ingot fusing
The pure magnesium ingot that at first adds 80～90 kilograms of surface cleanings makes it in aforementioned mixed gas protected fusing fully down, and the pure magnesium ingot that in batches will be preheating to design temperature then joins in the smelting furnace.Add about 25～40 kilograms the 1st time, concrete add-on is submerged in fully in the magnesium liquid with magnesium ingot and is as the criterion; Add the 2nd batch of preheated magnesium ingot until completely melted again, add-on still is submerged in fully in the magnesium liquid with magnesium ingot and is as the criterion; So repeatedly, reach 860 kilograms of preset values, after the fusing, the scum silica frost of molten surface is cleaned out fully, temperature is controlled at 760～780 ℃ with the spoon of skimming until the magnesium ingot add-on.
4, alloying
Pure Y ingot after the preheating is submerged in the magnesium melt together with the charging basket that adds that holds the Y ingot, the magnesium melt temperature is controlled at 780～790 ℃, treat that Y dissolves fully after, under this temperature, be incubated 45～55 minutes again, alloying element Y is evenly distributed in the magnesium melt;
5, casting
According to casting weight, with the melt transfer pump magnesium alloy liquation is poured in the extrusion casting machine in batches, extrusion casting becomes foundry goods.
After the Mg-15Y magnesium alloy process extrusion casting moulding of the present invention, its room temperature tension set δ 〉=12%, tensile strength sigma
bBe 275～285MPa, yield strength σ
0.2Be 225～235Mpa; Tensile strength sigma in the time of 250 ℃
b〉=265MPa.
Claims (4)
1, a kind of heat resistance magnesium alloy of high tenacity is characterized in that: the component content of this magnesium alloy is: the content of Y is 8～16wt%, and all the other are Mg.
2, the heat resistance magnesium alloy of high tenacity according to claim 1 is characterized in that: the content of described Y is 9～13wt%.
3, the melting method of the described magnesium alloy of a kind of claim 1, it is characterized in that: this method comprises the steps:
(1), gets the raw materials ready by the weight percent of the composition of the described magnesium alloy of claim 1;
(2), preheating oven is warmed up to 160～660 ℃, and smelting furnace is warmed up to 500～800 ℃, and feeds shielding gas to smelting furnace;
(3), in preheating oven, pure magnesium ingot is preheating to 100～600 ℃, simultaneously pure Y ingot is preheating to 100～500 ℃;
(4), in the smelting furnace of preheating, carry out the melting of pure magnesium ingot, the preheating pure magnesium ingot that at first will account for the fusing weight 1/2～1/20 of 1 smelting furnace adds in the smelting furnace, make its fusing fully under the protection of shielding gas, join remaining preheating pure magnesium ingot in the smelting furnace then in batches, after a collection of preheating pure magnesium ingot melts before treating, add the next batch preheated magnesium ingot again, every batch of add-on is submerged in the magnesium melt fully with pure magnesium ingot and is as the criterion; So repeat, reach preset value, after the fusing, the scum silica frost of molten surface is cleaned out fully, temperature is controlled at 680～860 ℃ until the pure magnesium ingot add-on;
(5), the pure Y ingot after the preheating is submerged in the magnesium melt together with the charging basket that adds that holds the Y ingot, adding charging basket is that soft steel or high chromium steel are made, and is thick with a large amount of apertures on it, is convenient to dissolving and the diffusion of Y;
(6), the magnesium melt temperature is controlled at 720～860 ℃, treat that Y dissolves fully after, 750～860 ℃ of insulations 10～60 minutes, alloying element Y is evenly distributed in the magnesium melt again;
(7), last, the magnesium alloy liquation is poured in the permanent mold casting mould of abundant preheating or the sand mold casting mould is frozen into ingot casting or foundry goods; Perhaps the magnesium alloy liquation is transported in the crystallizer, carries out continuously or semicontinuous casting; Perhaps the magnesium alloy liquation is poured in extrusion casting machine or the pressure die-casting machine in batches extrusion casting or be cast into foundry goods according to casting weight.
4, the melting method of magnesium alloy according to claim 3 is characterized in that: described shielding gas is for containing 0.2～0.5 volume %SF
6N
2
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| CNB2005101304700A CN100449021C (en) | 2005-12-13 | 2005-12-13 | High-toughness and heat-resisting magnesium-alloy and its melting method |
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|---|---|---|---|
| CNB2005101304700A CN100449021C (en) | 2005-12-13 | 2005-12-13 | High-toughness and heat-resisting magnesium-alloy and its melting method |
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| CN100449021C CN100449021C (en) | 2009-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831582B (en) * | 2007-07-05 | 2012-09-19 | 北京有色金属研究总院 | Low-cost heat resistance magnesium alloy containing rare earth and preparation method thereof |
| CN106834766A (en) * | 2015-12-03 | 2017-06-13 | 北京有色金属研究总院 | A kind of method for preparing large scale high alloy constituent content magnesium alloy ingot |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587430A (en) * | 2004-08-12 | 2005-03-02 | 上海交通大学 | Deformed magnesium alloy and its casting and deforming processing process |
| CN100387743C (en) * | 2005-04-21 | 2008-05-14 | 上海交通大学 | High-strength heat-resisting magnesium alloy and its preparing method |
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2005
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831582B (en) * | 2007-07-05 | 2012-09-19 | 北京有色金属研究总院 | Low-cost heat resistance magnesium alloy containing rare earth and preparation method thereof |
| CN106834766A (en) * | 2015-12-03 | 2017-06-13 | 北京有色金属研究总院 | A kind of method for preparing large scale high alloy constituent content magnesium alloy ingot |
| CN106834766B (en) * | 2015-12-03 | 2018-11-30 | 北京有色金属研究总院 | A method of preparing large scale high alloy constituent content magnesium alloy ingot |
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Effective date of registration: 20190703 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: 100088, 2, Xinjie street, Beijing Patentee before: General Research Institute for Nonferrous Metals |