CN103882272A - Mg-Sn-Ti wrought magnesium alloy and preparation method thereof - Google Patents

Mg-Sn-Ti wrought magnesium alloy and preparation method thereof Download PDF

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Publication number
CN103882272A
CN103882272A CN201410157700.1A CN201410157700A CN103882272A CN 103882272 A CN103882272 A CN 103882272A CN 201410157700 A CN201410157700 A CN 201410157700A CN 103882272 A CN103882272 A CN 103882272A
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China
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alloy
magnesium alloy
wrought magnesium
homogenizing
wrought
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CN201410157700.1A
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Chinese (zh)
Inventor
汤爱涛
喻正文
潘复生
林翰
杨如民
张磊
汪琴
许婷熠
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重庆大学
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Priority to CN201410157700.1A priority Critical patent/CN103882272A/en
Publication of CN103882272A publication Critical patent/CN103882272A/en

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Abstract

The invention relates to Mg-Sn-Ti wrought magnesium alloy which comprises 1.00-10.00 percent by weight of Sn, 0.10-1.00 percent by weight of Ti and the balance of Mg and unavoidable impurities. A preparation method comprises the following steps: firstly melting Mg, then adding Sn and tin-titanium intermediate alloy, stirring, refining and then pouring to obtain a cast ingot, subsequently treating the cast ingot by a uniform thermal treatment, and extruding to obtain a corresponding extruded section. The Mg-Sn-Ti ternary alloy disclosed by the invention is novel wrought magnesium alloy free of rare earth; raw materials for preparing the alloy are all relatively cheap industrial pure tin and tin-titanium intermediate alloy raw materials; the novel wrought magnesium alloy with both good intensity and good toughness is prepared through a relatively simple melting-uniform thermal treatment-extrusion process; the alloy section has excellent molding processability and has comprehensive mechanical properties better than those of the conventional commercial magnesium alloy AZ31.

Description

A kind of Mg-Sn-Ti wrought magnesium alloys and preparation method thereof
Technical field
The present invention relates to metal material field, particularly relate to a kind of novel Mg-Sn-Ti wrought magnesium alloys and preparation method thereof.
 
Background technology
Along with scientific and technological development, the consumption of global resources is increasing, causes the increasingly exhausted of the Nonrenewable resources such as oil, coal, therefore, greatly develop to reduce energy consumption, the lightweight structural material that minimizing carbon emission is target, becomes the focus in current Materials science research.And magnesium is little with its density, the advantage such as reserves are large, in the R&D process of novel material, has obtained paying close attention to widely.At present, use the AZ series magnesium alloy containing Al comparatively widely, its room-temperature property excellence, but poor high temperature stability; And containing the ZK series magnesium alloy of Zn and Zr, its high-temperature stability is good, but the scaling loss of fusion process interalloy element Zr is serious, causes cost higher, is unfavorable for further developing and applying; Containing the magnesium alloy of rare earth element (RE), there is very excellent room temperature ductility (Mg-RE dibasic magnesium alloy) and higher working strength (Mg-RE-Zn series magnesium alloy), but because rare earth is expensive, be used for the higher-end businesses such as military project, and rare earth resources is fewer and feweri, its price is thereupon more and more expensive.
Therefore,, can not only at higher temperature, use not containing the high performance magnesium alloy of rare earth in the urgent need to exploitation, and alloy has comparatively excellent room-temperature mechanical property; So present Many researchers both domestic and external is devoted to the research and development of the magnesium alloy of new system (not containing rare earth).Under this overall situation, Mg-Sn system has caused people's concern again.
 
Summary of the invention
For prior art above shortcomings, the object of this invention is to provide a kind of high-ductility wrought magnesium alloys that does not contain rare earth; The present invention also provides the preparation method of described wrought magnesium alloys.
Realize above-mentioned purpose, the present invention adopts following technical scheme: a kind of Mg-Sn-Ti wrought magnesium alloys, it is characterized in that, and its component content is: Sn 1.00~10.00 wt.%, Ti0.10~1.00 wt.%, all the other are Mg and inevitable impurity.
Further, the present invention also provides a kind of preparation method of Mg-Sn-Ti wrought magnesium alloys, comprises the steps:
1) melting ingot casting: take raw material by above-mentioned component, under the protection of insulating covering agent, first Mg is carried out to melting between 720 ℃~750 ℃, treat whole thawings, temperature rise to 750 ℃ adds the Sn and the tin titanium master alloy that are preheated to 150 ℃ after stablizing, and adds refining agent fully to stir 3~6 minutes, melt is left standstill to 20~30 minutes at 750 ℃, and destroy surperficial scum silica frost, and under the condition of 750 ℃, be poured in the swage that is preheating to 250~350 ℃, prepare magnesium alloy ingot;
2) homogenizing processing: by step 1) prepared magnesium alloy ingot covers with graphite, and under the condition of 450~520 ℃, homogenizing is processed 24 hours, and then shrend obtains the magnesium alloy ingot sample of homogenizing processing;
3) extruding: by step 2) institute's homogenizing magnesium alloy ingot sample after treatment, remove after surface scale at 250~350 ℃ preheating 2 hours, at 250~350 ℃, push; Extrusion ratio is 25:1, and extrusion speed is 0.9~1.2m/min.
Compared to existing technology, the present invention has following beneficial effect:
1, the Mg-Sn-Ti ternary alloy that the present invention proposes is a kind of novel wrought magnesium alloys that does not contain rare earth, in Mg-Sn-Ti ternary system, the solid solubility of Sn in Mg reached 14.48%, and there is hardly solid solubility in Ti in Mg, and Mg-Sn-Ti ternary alloy does not have ternary compound, only has Mg-Sn phase (Mg 2sn), Ti-Sn phase (Ti 3sn, Ti 2sn, Ti 5sn 3and Ti 6sn 5) and Mg three-phase.In the alloy system relating to, only exist Mg 2sn, α-Mg and α-Ti phase.So Sn not only can play the effect of solution strengthening in Mg alloy, can also play with Mg 2the effect of the second-phase complex intensifying of Sn, and α-Ti has suppressed growing up of crystal grain in alloy, has played obvious refined crystalline strengthening effect.And prepare intensity and all good Mg-Sn-Ti wrought magnesium alloyss of toughness by the method for traditional distortion extruding.
2, all relatively inexpensive industrial pure tin and tin titanium master alloy raw materials of the present invention's raw material used, intensity and all good novel wrought magnesium alloyss of toughness are prepared by comparatively simple melting-homogenizing thermal treatment-extrusion process, this alloy profile has excellent moulding processing characteristics, and its comprehensive mechanical performance is better than traditional commercial magnesium alloy AZ31.
 
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
It should be noted that, pure magnesium described in following embodiment and industrial pure tin purity are all more than 99%; Titanium is to add with the form of 10% tin titanium master alloy; Insulating covering agent adopts existing commercial No. five insulating covering agents, and its composition is: MgCl 2=24-30%, KCl=20-26%, CaF 2=13-15%, BaCl 2=12-16%, NaCl+CaCl 2<8%; Refining agent adopts hexachloroethane or argon gas.
One, the formula of Mg-Sn-Ti wrought magnesium alloys:
A kind of novel Mg-Sn-Ti wrought magnesium alloys, its component content is: Sn 1.00~10.00 wt.%, Ti0.10~1.00 wt.%, all the other are Mg and inevitable impurity.(Biao Zhong composition unit is wt.%).Specific embodiment is as follows:
Two, the preparation method of novel Mg-Sn-Ti wrought magnesium alloys is as follows.
embodiment 1:
A preparation method for Mg-Sn-Ti wrought magnesium alloys, comprises the steps:
1, take according to weight percent: industrial pure tin Sn 1%; Pure titanium Ti 0.1%(adds with tin titanium master alloy, and wherein tin titanium content is than being 9:1); Surplus is pure magnesium Mg.
2, under the protection of insulating covering agent; first pure magnesium is carried out to melting between 720 ℃~750 ℃; treat whole thawings; temperature rise to 750 ℃ adds the industrial pure tin and the tin titanium master alloy that are preheated to 150 ℃, and adds refining agent fully to stir 3~6 minutes after stablizing; melt is left standstill to 20~30 minutes at 750 ℃; and destroy surperficial scum silica frost, and under the condition of 750 ℃, be poured in the swage that is preheating to 250~350 ℃, prepare cast alloy ingot.
3, prepared magnesium alloy ingot is covered with graphite, under the condition of 500 ℃, homogenizing is processed 24 hours, and then shrend obtains the sample of homogenizing processing.
4, by magnesium alloy ingot after treatment homogenizing, remove after surface scale at 250 ℃ preheating 2 hours, extrusion ratio is 25:1, and extrusion speed is 0.9~1.2m/min, and extrusion temperature is to push and obtain bar under the condition of 250 ℃.
This strength of alloy is: 240 MPa; Yield strength is: 210 MPa; Unit elongation is: 30%.
embodiment 2:
A preparation method for Mg-Sn-Ti wrought magnesium alloys, comprises the steps:
1, take according to weight percent: industrial pure tin Sn 5%; Pure titanium Ti 0.5%(adds with tin titanium master alloy, and wherein tin titanium content is than being 9:1); Surplus is pure magnesium Mg.
2, under the protection of insulating covering agent; first pure magnesium is carried out to melting between 720 ℃ to 750 ℃; treat whole thawings; temperature rise to the 750 ℃ stable industrial pure tin and the tin titanium master alloy that are preheated to 150 ℃ of adding afterwards; and add refining agent fully to stir 3~6 minutes, melt is left standstill to 20~30 minutes at 750 ℃, and destroy surperficial scum silica frost; under the condition of 750 ℃, be poured in the swage that is preheating to 250~350 ℃, prepare cast alloy ingot.
3, prepared magnesium alloy ingot is covered with graphite, under the condition of 500 ℃, homogenizing is processed 24 hours, and then shrend obtains the sample of homogenizing processing.
4, by magnesium alloy ingot after treatment homogenizing, remove after surface scale at 250 ℃ preheating 2 hours, extrusion ratio is 25:1, and extrusion speed is 0.9~1.2m/min, and extrusion temperature is to push and obtain bar under the condition of 250 ℃.
embodiment 3:
1, take according to weight percent: industrial pure tin Sn 10%; Pure titanium Ti 1.0%(adds with tin titanium master alloy, and wherein tin titanium content is than being 9:1); Surplus is pure magnesium Mg.
2, under the protection of insulating covering agent; first pure magnesium is carried out to melting between 720 ℃ to 750 ℃; treat whole thawings; temperature rise to the 750 ℃ stable industrial pure tin and the tin titanium master alloy that are preheated to 150 ℃ of adding afterwards; and add refining agent fully to stir 3~6 minutes, melt is left standstill to 20~30 minutes at 750 ℃, and destroy surperficial scum silica frost; under the condition of 750 ℃, be poured in the swage that is preheating to 250~350 ℃, prepare cast alloy ingot.
3, prepared magnesium alloy ingot is covered with graphite, under the condition of 500 ℃, homogenizing is processed 24 hours, and then shrend obtains the sample of homogenizing processing.
4, by magnesium ingot after treatment homogenizing, remove after surface scale at 250 ℃ preheating 2 hours, extrusion ratio is 25:1, and extrusion speed is 0.9~1.2m/min, and extrusion temperature is to push and obtain bar under the condition of 250 ℃.
three, test result.
Adopt GB/T 228.1:2010 standard processing room temperature Elongation test sample, on SANSI UTM5000 universal testing machine, (rate of extension: 3 mm/s) tests magnesium alloy described in embodiment 1-3.
As can be seen from Table 1, at ambient temperature, tensile strength is greater than 240MPa to this magnesium alloy materials for specific embodiment and test effect, and yield strength is greater than 210MPa, and unit elongation is greater than 19%.Magnesium alloy of the present invention has good intensity and unit elongation.Can be used as the motor vehicle components lightweight structural materials such as 3C Product shell, automotive seat, engine mount, radiator bearer.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.

Claims (5)

1. a Mg-Sn-Ti wrought magnesium alloys, is characterized in that, its component content is: Sn 1.00~10.00 wt.%, and Ti0.10~1.00 wt.%, all the other are Mg and inevitable impurity.
2. Mg-Sn-Ti wrought magnesium alloys according to claim 1, is characterized in that, its component content is: Sn 5.00wt.%, and Ti0.5 wt.%, all the other are Mg and inevitable impurity.
3. a preparation method for Mg-Sn-Ti wrought magnesium alloys, is characterized in that, comprises the steps:
1) melting ingot casting: take raw material by the component of claim 1, under the protection of insulating covering agent, first Mg is carried out to melting between 720 ℃~750 ℃, treat whole thawings, temperature rise to 750 ℃ adds the Sn and the tin titanium master alloy that are preheated to 150 ℃ after stablizing, and adds refining agent fully to stir 3~6 minutes, melt is left standstill to 20~30 minutes at 750 ℃, and destroy surperficial scum silica frost, and under the condition of 750 ℃, be poured in the swage that is preheating to 250~350 ℃, prepare magnesium alloy ingot;
2) homogenizing processing: by step 1) prepared magnesium alloy ingot covers with graphite, and under the condition of 450~520 ℃, homogenizing is processed 24 hours, and then shrend obtains the magnesium alloy ingot sample of homogenizing processing;
3) extruding: by step 2) institute's homogenizing magnesium alloy ingot sample after treatment, remove after surface scale at 250~350 ℃ preheating 2 hours, at 250~350 ℃, push; Extrusion ratio is 25:1, and extrusion speed is 0.9~1.2m/min.
4. the preparation method of Mg-Sn-Ti wrought magnesium alloys according to claim 3, its spy is characterised in that, the composition of described insulating covering agent is: MgCl 2=24-30%, KCl=20-26%, CaF 2=13-15%, BaCl 2=12-16%, NaCl+CaCl 2<8%.
5. the preparation method of Mg-Sn-Ti wrought magnesium alloys according to claim 3, its spy is characterised in that, described refining agent adopts hexachloroethane.
CN201410157700.1A 2014-04-18 2014-04-18 Mg-Sn-Ti wrought magnesium alloy and preparation method thereof CN103882272A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105154732A (en) * 2015-09-17 2015-12-16 太原理工大学 Preparing method for magnesium-tin-zinc-aluminum-titanium alloy ingot
CN105220055A (en) * 2015-11-02 2016-01-06 武汉科技大学 A kind of accurate brilliant enhancing Mg-Zn-Gd-Y magnesium alloy and preparation method thereof
CN108517447A (en) * 2018-05-03 2018-09-11 重庆大学 A kind of high plastic magnesium alloy and preparation method thereof
CN110453124A (en) * 2018-05-08 2019-11-15 有研工程技术研究院有限公司 Stanniferous magnesium alloy and its preparation and processing method
US10544487B2 (en) 2015-12-30 2020-01-28 The Florida International University Board Of Trustees Age-hardenable magnesium alloys

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CN103114231A (en) * 2013-03-07 2013-05-22 重庆大学 Mg-Sn-Al wrought magnesium alloy and preparation method thereof
CN103290288A (en) * 2013-06-26 2013-09-11 重庆大学 Low-cost and high-ductility wrought magnesium alloy and preparation method thereof
CN103667838A (en) * 2014-01-03 2014-03-26 重庆大学 Mg-Sn-Mn system wrought magnesium alloy and preparation method thereof

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JPH0247238A (en) * 1988-08-08 1990-02-16 Nippon Telegr & Teleph Corp <Ntt> High-damping alloy and its production
CN103114231A (en) * 2013-03-07 2013-05-22 重庆大学 Mg-Sn-Al wrought magnesium alloy and preparation method thereof
CN103290288A (en) * 2013-06-26 2013-09-11 重庆大学 Low-cost and high-ductility wrought magnesium alloy and preparation method thereof
CN103667838A (en) * 2014-01-03 2014-03-26 重庆大学 Mg-Sn-Mn system wrought magnesium alloy and preparation method thereof

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105154732A (en) * 2015-09-17 2015-12-16 太原理工大学 Preparing method for magnesium-tin-zinc-aluminum-titanium alloy ingot
CN105154732B (en) * 2015-09-17 2017-07-11 太原理工大学 A kind of preparation method of magnesium Tin-zinc-aluminium titanium alloy ingot
CN105220055A (en) * 2015-11-02 2016-01-06 武汉科技大学 A kind of accurate brilliant enhancing Mg-Zn-Gd-Y magnesium alloy and preparation method thereof
US10544487B2 (en) 2015-12-30 2020-01-28 The Florida International University Board Of Trustees Age-hardenable magnesium alloys
CN108517447A (en) * 2018-05-03 2018-09-11 重庆大学 A kind of high plastic magnesium alloy and preparation method thereof
CN110453124A (en) * 2018-05-08 2019-11-15 有研工程技术研究院有限公司 Stanniferous magnesium alloy and its preparation and processing method
CN110453124B (en) * 2018-05-08 2021-02-05 有研工程技术研究院有限公司 Tin-magnesium alloy and preparation and processing method thereof

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Application publication date: 20140625