CN101942590B - Magnesium alloy for automobile parts and preparation method thereof - Google Patents
Magnesium alloy for automobile parts and preparation method thereof Download PDFInfo
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- CN101942590B CN101942590B CN2010105061681A CN201010506168A CN101942590B CN 101942590 B CN101942590 B CN 101942590B CN 2010105061681 A CN2010105061681 A CN 2010105061681A CN 201010506168 A CN201010506168 A CN 201010506168A CN 101942590 B CN101942590 B CN 101942590B
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- magnesiumalloy
- am60b
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Abstract
The invention discloses a magnesium alloy for automobile parts, which comprises the following components in percentage by weight: 5.0-7.0% of Al, 0.24-0.55% of Mn, 0.025-0.075% of Ti, 0.00125-0.00375% of C, 0.01-0.03% of Re, no more than 0.22% of Zn, no more than 0.10% of Si, no more than 0.01% of Cu, no more than 0.002% of Ni, no more than 0.005% of Fe and the balance Mg, wherein Zn, Si, Cu, Ni and Fe are impurity elements. The tensile strength of the magnesium alloy at room temperature is up to 195 MPa, and the percentage of elongation is up to 13.8%; and the magnesium alloy has the advantages of favorable structure and properties, high strength and high ductility, and can satisfy the requirements for magnesium alloy properties in automobile industry.
Description
Technical field
The present invention relates to a kind of magnesiumalloy, particularly relate to a kind of automobile component with magnesiumalloy and preparation method thereof.
Background technology
Magnesium is the lightest present metallic substance, and magnesiumalloy is widely used in industries such as automobile making, aerospace, electronic product, household electrical appliance at present.That magnesiumalloy not only has is in light weight, specific tenacity and specific rigidity are high, and has casting, processing and excellent in dimensional stability, is prone to characteristics such as recoverys, so is considered to the green structured material of tool application prospect of 21 century.
The above-mentioned various advantages that magnesiumalloy had cause magnesiumalloy in industry, to obtain application more and more widely in recent years.Wherein, in automobile component, be applied as emphasis with magnesiumalloy again, in order to satisfy the light-weighted requirement of automotive industry.And in automobile component are produced; Automotive hub is owing to need have higher-strength and than the material of high-ductility; And also should satisfy handling characteristics such as wear-resisting, corrosion-resistant, high surface finish simultaneously; Make with regard to present existing magnesiumalloy kind, be difficult to find out the magnesiumalloy kind that satisfies its performance requriements fully.
At present, in the Mg-Al series magnesium alloy commonly used, AZ91 and AM60 magnesiumalloy account for 90% of magnesiumalloy application total amount on the automobile.AZ91 has higher intensity, but its lower elongation has limited to the application (like automotive hub) of AZ91 on the automobile component that partly require high-plasticity; AM60 is the magnesiumalloy with better plasticity and toughness, but AM60 is lower owing to itself containing the Al amount, and the amount of separating out that contains the secondary compound of Al in the alloy reduces to some extent, causes the intensity of its alloy to decrease.So, though the AM60 magnesiumalloy has good plasticity and toughness, and, still can not satisfy the request for utilization of the automobile component that need have the high-strength and high ductility performance fully with regard to over-all properties, especially outstanding especially aspect intensity.AM60 compares with AZ91 has the lower characteristics of production cost; Therefore from the consideration that reduces production costs; Enlarge the AM60 magnesiumalloy use range, improve its using value; " bottleneck " that the present restriction of breakthrough AM60 alloy is applied on the automobile component just seems particularly meaningful to improve its obdurability, to work out the high-strength-toughness magnesium alloy that can be used for automobile component.
Summary of the invention
The objective of the invention is to overcome the deficiency of AM series magnesium alloy, a kind of have good organization and excellent properties are provided, the automobile component of high-strength, H.T. are with magnesiumalloy and preparation method thereof.
The present invention adopts following technical scheme:
A kind of automobile component are used magnesiumalloy, and its component and weight percentage are: Al:5.0～7.0%, Mn:0.24～0.55%; Ti:0.025～0.075%, C:0.00125～0.00375%, RE:0.01～0.03%; Impurity element: Zn≤0.22%, Si≤0.10%, Cu≤0.01%; Ni≤0.002%, Fe≤0.005%, surplus is Mg.
A kind of automobile component comprise the steps: with the preparation method of magnesiumalloy
The first step, Steel Crucible are heated to 400 ℃, feed shielding gas SF
6And CO
2, add the AM60B magnesiumalloy after removing surface irregularities behind the 5min, SF
6Flow is 40～50ml/min, CO
2Flow is 0.2～0.3m
3/ h;
Second step is with 150 ℃ ~ 250 ℃ preheating 15 ~ 30min of Al-Ti-C-RE master alloy warp;
The 3rd step; The Steel Crucible temperature is risen to 720 ℃, addition is accounted for the Al-Ti-C-RE master alloy of AM60B magnesiumalloy gross weight 0.5% ~ 1.5%, be added in the molten state AM60B magnesiumalloy; The Steel Crucible temperature is risen to 740 ℃ and be incubated 5 ~ 10min, evenly stir;
The 4th step, the Steel Crucible temperature is reduced to 710 ~ 720 ℃, leave standstill the oxide compound of removing the surface behind 10min ~ 20min, be poured in the metal die.
Further, in said the 4th step, be preheated to 100 ℃ after the rust cleaning in the metal die before the cast, coat the coating of the anti-oxidation easy demoulding at the metal die inner chamber, be preheated to 250 ℃ again, feed shielding gas 30s ~ 60s, said shielding gas is SF
6And CO
2
Further, in the said the first step, add the preceding AM60B magnesiumalloy of Steel Crucible preheating 0.3h ~ 0.5h under 150 ~ 200 ℃ of temperature earlier.
Further, the chemical ingredients of said master alloy Al-Ti-C-RE and mass percent are: Al: 92.75%, and Ti:5%, C:0.25%, RE:2%.
Beneficial effect of the present invention is:
1, fining agent adopts the Al-Ti-C-RE master alloy to replace original blacking such as Sesquichloratum, paraffin, carbon black etc., avoided original blacking its because of emitting of the very big harm of a large amount of toxic gases in the process on the turn to environment and human body generation; Al-Ti-C-RE not only has good refinement modification effect to the AM60B magnesiumalloy, and cost is low, the operation is simple and easy, free from environmental pollution.
2, C, Ti, RE element add with the form of master alloy Al-Ti-C-RE, and fusing is fast, and specific absorption is high, and preparation technology is simple, and it is convenient to implement.
3, in the AM60B alloy, add C, Ti, RE element simultaneously,, not only can change dendrite gap and the size of α-Mg, and can change Mg through refinement and rotten dual function
17Al
12Phase amount, size, pattern and distribution significantly improve alloy structure, improve alloy mechanical property.
Other advantages of the present invention, target and characteristic will be set forth in specification sheets subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from practice of the present invention, obtain instruction to investigating of hereinafter.Target of the present invention can realize through the following structure that specification sheets particularly pointed out and obtain with other advantages.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment 1: contain Al:5.0～7.0% with preparation, Mn:0.24～0.55%, Ti:0.025%, C:0.00125%; RE:0.01%, (impurity element: Zn≤0.22%, Si≤0.10%; Cu≤0.01%, Ni≤0.002%, Fe≤0.005%) all the other are example for the magnesiumalloy of Mg.
The first step, Steel Crucible are heated to 400 ℃, feed SF
6+ CO
2Shielding gas (SF
6Flow is 45ml/min, CO
2Flow is 0.25m
3/ h) adding the AM60B magnesiumalloy behind the 5min, the AM60B magnesiumalloy needs first oil removing, dewaters and surperficial foreign material such as oxide compound preheating 0.5h under 150 ℃ of temperature;
In second step, the Al-Ti-C-RE master alloy is through 200 ℃ of preheating 15min;
The 3rd step rose to 720 ℃ with the Steel Crucible temperature, and the furnace charge that is housed to (being the AM60B magnesiumalloy) all after the fusing, adds the Al-Ti-C-RE master alloy that accounts for AM60B magnesiumalloy gross weight 0.5%, and the Steel Crucible temperature is risen to 740 ℃ and be incubated 5min, stirred;
The 4th step, the Steel Crucible temperature is reduced to 710 ℃, leave standstill the oxide compound of removing the surface behind the 20min, be poured in the metal die; Metal die needs pre-treatment before the cast: after adopting diameter to be the metal die rust cleaning of 25mm, before cast, be preheated to 100 ℃ earlier, coat then with Al (OH)
3, the coating that is mixed with of Starso and water, be preheated to 250 ℃ again, feed shielding gas 30s～60s, shielding gas is SF
6And CO
2
The metal die inner chamber needs first preheating stenciling coating again, can make like this that moisture evaporates rapidly in the coating, and the effect of coating is anti-oxidation and is easy to the demoulding.Should prevent that evenly coating is dirty by spary, purpose is for obtaining the fine and close dope layer uniformly of one deck.During stenciling coating, mold preheating temperature is (preheating temperature is unsuitable too high, otherwise coating peels off easily) about 100 ℃, is preheated to 250 ℃ behind the stenciling coating again.In whole casting process, guarantee that melt all is under the protection of shielding gas, cast gate is as far as possible near funnel during cast, and cast should be steady, avoids eddy current and splash.
In the 5th step, Steel Crucible is poured out remaining magnesiumalloy liquation after cast finishes, naturally cool to below 150 ℃, slowly pours hot water into, behind the immersion several hrs, removes remaining slag.
OM and SEM pattern show, after the AM60B magnesiumalloy adds the Al-Ti-C-RE master alloy, in the alloy originally thick α-Mg dentrite diminish slightly, dendrite interval is not found out obviously and is reduced; Originally be continuous or semicontinuous netted Mg
17Al
12Part fracture mutually, but still have continuous net-shaped Mg
17Al
12Be distributed on the magnesium matrix mutually.
The tensile property of sample: under this experiment condition, this Al:5.0～7.0% that contains, Mn:0.24～0.55%, Ti:0.025%; C:0.00125%, RE:0.01%, all the other are Mg; (impurity element: Zn≤0.22%, Si≤0.10%, Cu≤0.01%; Ni≤0.002%, Fe≤0.005%) magnesiumalloy tensile strength is 175Mpa, elongation 10.3%.
Embodiment 2: contain Al:5.0～7.0% with preparation, Mn:0.24～0.55%, Ti:0.04%, C:0.002%; RE:0.016%, all the other are Mg, (impurity element: Zn≤0.22%, Si≤0.10%; Cu≤0.01%, Ni≤0.002%, Fe≤0.005%) magnesiumalloy be example.
The first step, Steel Crucible are heated to 400 ℃, feed SF
6+ CO
2Shielding gas (SF
6Flow is 40ml/min, CO
2Flow is 0.3m
3/ h) add the AM60B magnesiumalloy behind the 5min;
In second step, the Al-Ti-C-RE master alloy is through 150 ℃ of preheating 30min;
The 3rd step rose to 720 ℃ with the Steel Crucible temperature, and the furnace charge that is housed to (being the AM60B magnesiumalloy) all after the fusing, adds the Al-Ti-C-RE master alloy that accounts for AM60B magnesiumalloy gross weight 0.8%, and the Steel Crucible temperature is risen to 740 ℃ and be incubated 8min, stirred;
The 4th step, the Steel Crucible temperature is reduced to 710 ℃, leave standstill the oxide compound of removing the surface behind the 10min, be poured in the metal die; The preprocessing process such as the embodiment 1 of metal die before the cast;
In the 5th step, Steel Crucible is poured out remaining magnesiumalloy liquation after cast finishes, naturally cool to below 150 ℃, slowly pours hot water into, behind the immersion several hrs, removes remaining slag.
OM and SEM pattern show that after AM60B added the Al-Ti-C-RE master alloy, the thick α-Mg dentrite of script diminished in the alloy, and primary dendritic spacing and secondary dendrite arm spacing reduce slightly, are continuous or semicontinuous netted Mg originally
17Al
12Basically interrupted mutually, be corynebacterium or semicontinuous shape discrete distribution on magnesium matrix.
The tensile property of sample: under this experiment condition, this Al:5.0～7.0% that contains, Mn:0.24～0.55%, Ti:0.04%; C:0.002%, RE:0.016%, all the other are Mg; (impurity element: Zn≤0.22%, Si≤0.10%, Cu≤0.01%; The tensile strength of magnesiumalloy Ni≤0.002%, Fe≤0.005%) is 186Mpa, elongation 11.1%.
Embodiment 3: contain Al:5.0～7.0% with preparation, Mn:0.24～0.55%, Ti:0.05%, C:0.0025%; RE:0.02%, all the other are Mg (impurity element: Zn≤0.22%, Si≤0.10%; Cu≤0.01%, Ni≤0.002%, Fe≤0.005%) magnesiumalloy be example.
The first step, Steel Crucible are heated to 400 ℃, feed SF
6+ CO
2Shielding gas (SF
6Flow is 50ml/min, CO
2Flow is 0.2m
3/ h) add the AM60B magnesiumalloy behind the 5min;
In second step, the Al-Ti-C-RE master alloy is through 250 ℃ of preheating 15min;
The 3rd step; The Steel Crucible temperature is risen to 720 ℃, and the furnace charge that is housed to (being the AM60B magnesiumalloy) adds the Al-Ti-C-RE master alloy that accounts for AM60B magnesiumalloy gross weight 1.0% after all melting; The Steel Crucible temperature is risen to 740 ℃ and be incubated 10min, stir;
The 4th step, the Steel Crucible temperature is reduced to 710 ℃, leave standstill the oxide compound of removing the surface behind the 15min, be poured in the metal die; The preprocessing process such as the embodiment 1 of metal die before the cast;
In the 5th step, Steel Crucible is poured out remaining magnesiumalloy liquation after cast finishes, naturally cool to below 150 ℃, slowly pours hot water into, behind the immersion several hrs, removes remaining slag.
OM and SEM pattern show that after AM60B added the Al-Ti-C-RE master alloy, the thick α-Mg dentrite of script obviously diminished in the alloy, and primary dendritic spacing and secondary dendrite arm spacing are less; Continuous or semicontinuous netted Mg
17Al
12All interrupted mutually, be corynebacterium or the cobble shape is uniformly distributed on the magnesium matrix.
The tensile property of sample: under this experiment condition, this Al:5.0～7.0% that contains, Mn:0.24～0.55%, Ti:0.05%; C:0.0025%, RE:0.02%, all the other are Mg; (impurity element: Zn≤0.22%, Si≤0.10%, Cu≤0.01%; Ni≤0.002%, Fe≤0.005%) magnesiumalloy tensile strength is 195Mpa, and elongation is 11.3%
Embodiment 4: contain Al:5.0～7.0% with preparation, Mn:0.24～0.55%, Ti:0.075%, C:0.00375%; RE:0.03%, all the other are Mg, (impurity element: Zn≤0.22%, Si≤0.10%; Cu≤0.01%, Ni≤0.002%, Fe≤0.005%) magnesiumalloy be example.
The first step, Steel Crucible are heated to 400 ℃, feed SF
6+ CO
2Shielding gas (SF
6Flow is 45ml/min, CO
2Flow is 0.25m
3/ h) add the AM60B magnesiumalloy behind the 5min;
In second step, the Al-Ti-C-RE master alloy is through 250 ℃ of preheating 20min;
The 3rd step; The Steel Crucible temperature is risen to 720 ℃, and the furnace charge that is housed to (being the AM60B magnesiumalloy) adds the Al-Ti-C-RE master alloy that accounts for AM60B magnesiumalloy gross weight 1.5% after all melting; The Steel Crucible temperature is risen to 740 ℃ and be incubated 10min, stir;
The 4th step, the Steel Crucible temperature is reduced to 720 ℃, leave standstill the oxide compound of removing the surface behind the 10min, be poured in the metal die; The preprocessing process such as the embodiment 1 of metal die before the cast;
In the 5th step, Steel Crucible is poured out remaining magnesiumalloy liquation after cast finishes, naturally cool to below 150 ℃, slowly pours hot water into, behind the immersion several hrs, removes remaining slag.
OM and SEM pattern show, after AM60B adds 1.5% Al-Ti-C-RE master alloy, though originally thick α-Mg dentrite by refinement, primary dendritic spacing and secondary dendrite arm spacing reduce also not obvious, continuous or semicontinuous netted Mg
17Al
12Have only the part fracture to disperse mutually, be semicontinuous corynebacterium and be distributed on the magnesium matrix.Compare with embodiment 3, thinning effect presents decay.But the thinning effect of embodiment 4 is better than the thinning effect of embodiment 1.
The tensile property of sample: under this experiment condition, this Al:5.0～7.0% that contains, Mn:0.24～0.55%, Ti:0.075%; C:0.00375%, RE:0.03%, all the other are Mg; (impurity element: Zn≤0.22%, Si≤0.10%, Cu≤0.01%; The tensile strength of magnesiumalloy Ni≤0.002%, Fe≤0.005%) is 180Mpa, and elongation is 10.5%.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Other modifications that those of ordinary skills make technical scheme of the present invention perhaps are equal to replacement; Only otherwise break away from the spirit and the scope of technical scheme of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. automobile component is characterized in that: comprise the steps: with the preparation method of magnesiumalloy
The first step, Steel Crucible are heated to 400 ℃, feed shielding gas SF
6And CO
2, add the AM60B magnesiumalloy after removing surface irregularities behind the 5min, SF
6Flow is 40～50ml/min, CO
2Flow is 0.2～0.3m
3/ h;
Second step is with 150 ℃ ~ 250 ℃ preheating 15 ~ 30min of Al-Ti-C-RE master alloy warp;
The 3rd step; The Steel Crucible temperature is risen to 720 ℃, addition is accounted for the Al-Ti-C-RE master alloy of AM60B magnesiumalloy gross weight 0.5% ~ 1.5%, be added in the molten state AM60B magnesiumalloy; The Steel Crucible temperature is risen to 740 ℃ and be incubated 5 ~ 10min, evenly stir;
The 4th step, the Steel Crucible temperature is reduced to 710 ~ 720 ℃, leave standstill the oxide compound of removing the surface behind 10min ~ 20min, be poured in the metal die; The automobile component that obtain use its component of magnesiumalloy and weight percentage to be: Al:5.0～7.0%, Mn:0.24～0.55%, Ti:0.025～0.075%; C:0.00125～0.00375%, RE:0.01～0.03%, impurity element: Zn≤0.22%; Si≤0.10%, Cu≤0.01%, Ni≤0.002%; Fe≤0.005%, surplus are Mg.
2. a kind of automobile component according to claim 1 are with the preparation method of magnesiumalloy; It is characterized in that: in said the 4th step; Be preheated to 100 ℃ after the rust cleaning in the metal die before the cast, coat the coating of the anti-oxidation easy demoulding, be preheated to 250 ℃ again at the metal die inner chamber; Feed shielding gas 30s ~ 60s, said shielding gas is SF
6And CO
2
3. a kind of automobile component according to claim 2 is characterized in that with the preparation method of magnesiumalloy: in the said the first step, add the preceding AM60B magnesiumalloy of Steel Crucible preheating 0.3h ~ 0.5h under 150 ~ 200 ℃ of temperature earlier.
4. a kind of automobile component according to claim 3 is characterized in that with the preparation method of magnesiumalloy: the chemical ingredients of said master alloy Al-Ti-C-RE and mass percent are: Al: 92.75%, and Ti:5%, C:0.25%, RE:2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105061681A CN101942590B (en) | 2010-10-14 | 2010-10-14 | Magnesium alloy for automobile parts and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105061681A CN101942590B (en) | 2010-10-14 | 2010-10-14 | Magnesium alloy for automobile parts and preparation method thereof |
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|---|---|
| CN101942590A CN101942590A (en) | 2011-01-12 |
| CN101942590B true CN101942590B (en) | 2012-05-23 |
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|---|---|---|---|---|
| CN102366827B (en) * | 2011-10-10 | 2017-02-22 | 海安华达石油仪器有限公司 | Extrusion casting method of cylinder cover cap of magnesium alloy automobile engine |
| CN104131201B (en) * | 2014-08-18 | 2016-03-30 | 河南誉金技术服务有限公司 | A kind of Mg-Al base alloy refinement alterant and its preparation method and application |
| CN106881565A (en) * | 2017-02-16 | 2017-06-23 | 安徽远嘉轨道车辆装备有限公司 | A kind of railway train body lightweight manufacture method |
| CN107815575A (en) * | 2017-10-26 | 2018-03-20 | 安徽恒利增材制造科技有限公司 | A kind of magnesium alloy ingot casting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876871A (en) * | 2006-06-29 | 2006-12-13 | 上海交通大学 | Magnalium-series deformed magnesium alloy for high speed extrusion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09279286A (en) * | 1996-04-16 | 1997-10-28 | Ube Ind Ltd | Billet made of magnesium alloy and its production |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876871A (en) * | 2006-06-29 | 2006-12-13 | 上海交通大学 | Magnalium-series deformed magnesium alloy for high speed extrusion |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平9-279286A 1997.10.28 |
| 孟保平等.Al-Ti-C-RE对AZ系变形镁合金的晶粒细化作用.《有色金属加工》.2005,第34卷(第3期), * |
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