CN101440449A - Multicomponent heat resisting magnesium alloy and preparation thereof - Google Patents
Multicomponent heat resisting magnesium alloy and preparation thereof Download PDFInfo
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- CN101440449A CN101440449A CNA200810237215XA CN200810237215A CN101440449A CN 101440449 A CN101440449 A CN 101440449A CN A200810237215X A CNA200810237215X A CN A200810237215XA CN 200810237215 A CN200810237215 A CN 200810237215A CN 101440449 A CN101440449 A CN 101440449A
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Abstract
The invention provides a complex heat-resistant magnesium alloy, which comprises the following compositions by mass percentage: 3 to 5 percent of Sn, 1.0 to 1.5 percent of Mn, 0.9 to 1.8 percent of Ca, 0.3 to 0.6 percent of Ce, 0.3 to 0.5 percent of Sc, 0.08 to 0.12 percent of Sr, less than or equal to 0.02 percent of impurity element Si, less than or equal to 0.005 percent of Fe, less than or equal to 0.015 percent of Cu, less than or equal to 0.002 percent of Ni, and Mg as a balance element. The invention also provides a preparation method for the alloy. The alloy has excellent mechanical performance and creep resistant performance.
Description
Technical field:
The invention belongs to the heatproof magnesium alloy material field, relate to a kind of light metal material, especially a kind of multicomponent heat-resistant magnesium alloy and preparation method thereof.
Background technology:
Magnesium alloy is as the commercial metal engineering structured material of light-weight, falls because of it has light specific gravity, specific tenacity specific rigidity height, damping vibration attenuation that dry ability is strong, liquid condition shaping superior performance and be easy to advantage such as recycling, is described as 21 century " green structured material ".But at present because the high-temperature creep resistance of existing magnesium alloy is poor, the long term operation temperature can not be above 120 ℃, make it can't be used for making, therefore greatly hindered the further application of magnesium alloy the demanding motor car engine of high temperature creep property and other drive disk assemblies.Also just because of like this, research and development for the heat resistance magnesium alloy with high-temperature creep resistance have both at home and abroad given great attention, and the heat resistance magnesium alloy of series such as Mg-Al-Si, Mg-Al-RE, Mg-Al-Ca, Mg-Al-Ca-RE, Mg-Al-Sr, Mg-Al-Sn, Mg-Zn-Al, Mg-Zn-RE, Mg-Zn-Si, Mg-Zn-Sn, Mg-Y-Nd and Mg-Sn-Ca has been studied in trial-production successively.Yet, these obtain manufacturing experimently in the heat resistance magnesium alloy system of research in the above, really obtain mainly concentrating on the minority alloy of practical application, as the WE43 alloy of the AE42 alloy in the Mg-Al-RE system, Mg-Y-Nd system and the AS41 and the AS21 alloy of Mg-Al-Si system.In addition, even these heat resistance magnesium alloys that are applied also make its application be subjected in various degree restriction because there is different separately problems.As for AE42 alloy and WE43 alloy, it all contains high-load RE (〉 2.5%) and/or precious metal elements such as Y, Th, the cost of alloy is higher, and it only is used for the contour performance engine of racing car, not widespread use on automobile at present.And for AS41 and AS21 alloy, because of there being the Mg of thick Chinese character shape in its alloy structure
2The Si phase, the mechanical property of grievous injury alloy makes that this is that alloy can only be used for setting rate extrusion process faster at present, and can not be used for Castingother technology.Therefore, be necessary the further novel heat resistance magnesium alloy of research and development.
Summary of the invention:
The object of the present invention is to provide a kind of polynary heat resistance magnesium alloy and preparation method thereof with excellent mechanical performances and creep-resistant property.
A kind of multicomponent heat-resistant magnesium alloy provided by the invention, each component and mass percent thereof are: Sn content is 3-5%, and Mn content is 1.0-1.5%, and Ca content is 0.9-1.8%, Ce content is 0.3-0.6%, Sc content 0.3-0.5%, Sr content are 0.08-0.12%, impurity element Si content≤0.02%, Fe content≤0.005%, Cu content≤0.015%, Ni content≤0.002%, Mg are balance-element.
Sn, Mn and Ca consider mainly that as main constituent element Sn and Ca can form the high CaMgSn of thermostability mutually among the present invention, the content that Mn then helps improving the intensity of alloy and reduces impurity element Fe.The Sn of Tian Jiaing can also partly dissolve in matrix raising corrosion resistance of alloy in addition, but because the proportion of Sn is bigger, so its add-on is not higher than 5%.Ce, Sc and Sr consider mainly that as accessory constituent element Ce has the atomic radius bigger than the Sn element among the present invention, can hinder the Sn atomic diffusion in process of setting, thus refinement CaMgSn phase; Mainly be to form Mn and add micro-Sc with Mn
2The Sc phase is further strengthened alloy, but because the price of Sc is more expensive, so its add-on is not higher than 0.5%; Add micro-Sr mainly in order to eliminate in the alloy because of having hot tearing that Ca may cause and defective such as loose, in addition, micro-Sr also has the effect of refinement alloy grain concurrently.
The preparation method of a kind of multicomponent heat-resistant magnesium alloy provided by the invention, it mainly comprises following two steps:
1) Mg, Sn, Mn, Ca, Ce, Sc and Sr are pressed corresponding ingredient composition, wherein Mg and Sn are with technical pure Mg and pure Sn (〉 99.99wt.%) the form interpolation, Mn, Ca, Ce, Sc and Sr add with the form of Mg-4wt.%Mn, Mg-19wt.%Ca, Mg-29wt.%Ce, Mg-3wt.%Sc and Mg-10wt.%Sr master alloy respectively.Under flux or gas shield; after the temperature of plumbago crucible reaches 200-250 ℃; add the pure Mg of preheating, pure Sn and Mg-4wt.%Mn master alloy and with its fusing; be warmed up to 720-740 ℃ after the fusing; Mg-19wt.%Ca, the Mg-29wt.%Ce and the Mg-3wt.%Sc master alloy that add preheating then treat that these master alloy fusing backs add the Mg-10wt.%Sr master alloy.The adding method of Mg-10wt.%Sr master alloy: about 100-150 ℃,, with pressing wooden dipper to be pressed into the alloy liquid level rapidly following about 2-6 minute, be warmed up to 720-760 ℃ after the stirring then, use C then with Mg-10wt.%Sr master alloy baking 15-30 minute
2Cl
6Refining agent refining treatment 5-10 minute, the refining back that finishes is stirred alloy melt and was left standstill 10-15 minute at 740 ℃, leaves standstill and drags for the floating assorted of alloy melt surface after finishing, and casts then.
2) alloy that casting is obtained carries out ageing treatment, is specially: alloy is put into the electric furnace that leads to protective atmosphere, be incubated 15-40 hour down at 200-300 ℃, in the cold water of quenching then.The purpose of ageing treatment is to separate out Mn
2The Sc phase is so that the performance of alloy is further enhanced.
This alloy has excellent mechanical performances and creep-resistant property.
Description of drawings
Fig. 1 is the microstructure picture behind the alloy aging of embodiment 1.
Fig. 2 is the microstructure picture behind the alloy aging of embodiment 2.
Fig. 3 is the microstructure picture behind the alloy aging of embodiment 3.
Embodiment:
Below by three concrete embodiment technical scheme of the present invention and effect are further elaborated.
Embodiment 1: the composition of alloy (weight percent) is: Sn content is 3%, and Mn content is 1.0%, and Ca content is 1%, Ce content is 0.5%, and Sc content 0.3%, Sr content are 0.08%, the total amount of impurity element Si, Fe, Cu and Ni is less than 0.02%, and all the other are Mg.
Press the mentioned component alloyage, wherein Mg and Sn are all with technical pure Mg and pure Sn (〉 99.99wt.%) the form interpolation, Mn, Ca, Ce, Sc and Sr add with the form of Mg-4wt.%Mn, Mg-19wt.%Ca, Mg-29wt.%Ce, Mg-3wt.%Sc and Mg-10wt.%Sr master alloy respectively.Under flux or gas shield; when the temperature of plumbago crucible reaches 200-250 ℃; add the pure Mg of preheating, pure Sn and Mg-4wt.%Mn master alloy and with its fusing; be warmed up to 740 ℃ after the fusing; Mg-19wt.%Ca, the Mg-29wt.%Ce and the Mg-3wt.%Sc master alloy that add preheating then treat that these master alloy fusing backs add the Mg-10wt.%Sr master alloy.The adding method of Mg-10wt.%Sr master alloy: about 150 ℃,, with pressing wooden dipper to be pressed into the alloy liquid level rapidly following about 3 minutes, be warmed up to 740 ℃ after the stirring then, use C then with Mg-10wt.%Sr master alloy baking 20 minutes
2Cl
6Refining agent refining treatment 5 minutes, the refining back that finishes is stirred alloy melt and was left standstill 15 minutes at 740 ℃, leaves standstill and drags for the floating assorted of alloy melt surface after finishing, and casts into then in the metal mold that has been preheating to 100-150 ℃.The aging treatment process of alloy is: be incubated 32 hours down at 250 ℃, in the cold water of quenching then.Microstructure picture behind the alloy aging as shown in Figure 1.
The alloy that present embodiment obtains, its room temperature tensile strength is 179MPa, and yield strength is 162MPa, and unit elongation is 3.2%; Tensile strength under 150 ℃ is 167MPa, and yield strength is 151MPa, and unit elongation is 15.7%; In creep temperature is that 150 ℃ and stress are that the total creep amount that continues 100h under the 70MPa is 1.11%, and minimum creep rate is 3.08 * 10
-8s
-1
Embodiment 2: the composition of alloy (weight percent) is: Sn content is 4%, and Mn content is 1.2%, and Ca content is 1.5%, Ce content is 0.3%, and Sc content 0.4%, Sr content are 0.1%, the total amount of impurity element Si, Fe, Cu and Ni is less than 0.02%, and all the other are Mg.
Press the mentioned component alloyage, wherein Mg and Sn are all with technical pure Mg and pure Sn (〉 99.99wt.%) the form interpolation, Mn, Ca, Ce, Sc and Sr add with the form of Mg-4wt.%Mn, Mg-19wt.%Ca, Mg-29wt.%Ce, Mg-3wt.%Sc and Mg-10wt.%Sr master alloy respectively.Under flux or gas shield; when the temperature of plumbago crucible reaches 200-250 ℃; add the pure Mg of preheating, pure Sn and Mg-4wt.%Mn master alloy and with its fusing; be warmed up to 740 ℃ after the fusing; Mg-19wt.%Ca, the Mg-29wt.%Ce and the Mg-3wt.%Sc master alloy that add preheating then treat that these master alloy fusing backs add the Mg-10wt.%Sr master alloy.The adding method of Mg-10wt.%Sr master alloy: about 150 ℃,, with pressing wooden dipper to be pressed into the alloy liquid level rapidly following about 4 minutes, be warmed up to 750 ℃ after the stirring then, use C then with Mg-10wt.%Sr master alloy baking 20 minutes
2Cl
6Refining agent refining treatment 6 minutes, the refining back that finishes is stirred alloy melt and was left standstill 15 minutes at 740 ℃, leaves standstill and drags for the floating assorted of alloy melt surface after finishing, and casts into then in the metal mold that has been preheating to 100-150 ℃.The aging treatment process of alloy is: be incubated 24 hours down at 275 ℃, in the cold water of quenching then.Microstructure picture behind the alloy aging as shown in Figure 2.
The alloy that present embodiment obtains, its room temperature tensile strength is 187MPa, and yield strength is 175MPa, and unit elongation is 3.6%; Tensile strength under 150 ℃ is 173MPa, and yield strength is 165MPa, and unit elongation is 19.8%; In creep temperature is that 150 ℃ and stress are that the total creep amount that continues 100h under the 70MPa is 0.99%, and minimum creep rate is 2.75 * 10
-8s
-1
Embodiment 3: the composition of alloy (weight percent) is: Sn content is 5%, and Mn content is 1.5%, and Ca content is 2%, Ce content is 0.6%, and Sc content 0.5%, Sr content are 0.12%, the total amount of impurity element Si, Fe, Cu and Ni is less than 0.02%, and all the other are Mg.
Press the mentioned component alloyage, wherein Mg and Sn are all with technical pure Mg and pure Sn (〉 99.99wt.%) the form interpolation, Mn, Ca, Ce, Sc and Sr add with the form of Mg-4wt.%Mn, Mg-19wt.%Ca, Mg-29wt.%Ce, Mg-3wt.%Sc and Mg-10wt.%Sr master alloy respectively.Under flux or gas shield; when the temperature of plumbago crucible reaches 200-250 ℃; add the pure Mg of preheating, pure Sn and Mg-4%Mn master alloy and with its fusing; be warmed up to 730 ℃ after the fusing; Mg-19wt.%Ca, the Mg-29wt.%Ce and the Mg-3wt.%Sc master alloy that add preheating then treat that these master alloy fusing backs add the Mg-10wt.%Sr master alloy.The adding method of Mg-10wt.%Sr master alloy: about 150 ℃,, with pressing wooden dipper to be pressed into the alloy liquid level rapidly following about 3 minutes, be warmed up to 740 ℃ after the stirring then, use C then with Mg-10wt.%Sr master alloy baking 20 minutes
2Cl
6Refining agent refining treatment 5 minutes, the refining back that finishes is stirred alloy melt and was left standstill 15 minutes at 740 ℃, leaves standstill and drags for the floating assorted of alloy melt surface after finishing, and casts into then in the metal mold that has been preheating to 100-150 ℃.The aging treatment process of alloy is: be incubated 36 hours down at 225 ℃, in the cold water of quenching then.Microstructure picture behind the alloy aging as shown in Figure 3.
The alloy that present embodiment obtains, its room temperature tensile strength is 175MPa, and yield strength is 164MPa, and unit elongation is 3.3%; Tensile strength under 150 ℃ is 161MPa, and yield strength is 150MPa, and unit elongation is 16.2%; In creep temperature is that 150 ℃ and stress are that the total creep amount that continues 100h under the 70MPa is 1.38%, and minimum creep rate is 3.83 * 10
-8s
-1
Claims (3)
1, a kind of multicomponent heat-resistant magnesium alloy, each component and mass percent thereof are: Sn3-5%, Mn1.0-1.5%, Ca0.9-1.8%, Ce0.3-0.6%, Sc0.3-0.5%, Sr0.08-0.12%, impurity element Si content≤0.02%, Fe content≤0.005%, Cu content≤0.015%, Ni content≤0.002%, all the other are balance-element Mg.
2, the preparation method of the described multicomponent heat-resistant magnesium alloy of claim 1 comprises following two steps:
1) Mg, Sn, Mn, Ca, Ce, Sc and Sr are pressed the described ingredient composition of claim 1, wherein Mg and Sn are with purity〉the technical pure Mg of 99.99wt.% and pure Sn form add, and Mn, Ca, Ce, Sc and Sr add with the form of Mg-4wt.%Mn, Mg-19wt.%Ca, Mg-29wt.%Ce, Mg-3wt.%Sc and Mg-10wt.%Sr master alloy respectively; Under flux or gas shield, after the temperature of plumbago crucible reaches 200-250 ℃, add the pure Mg of preheating, pure Sn and Mg-4wt.%Mn master alloy and with its fusing, be warmed up to 720-740 ℃ after the fusing, Mg-19wt.%Ca, the Mg-29wt.%Ce and the Mg-3wt.%Sc master alloy that add preheating then treat that these master alloy fusing backs add the Mg-10wt.%Sr master alloy; The adding method of Mg-10wt.%Sr master alloy: at 100-150 ℃ the Mg-10%Sr master alloy was toasted 15-30 minute, with pressing wooden dipper to be pressed into the alloy liquid level rapidly following about 2-6 minute, be warmed up to 720-760 ℃ after the stirring then, use C then
2Cl
6Refining agent refining treatment 5-10 minute, the refining back that finishes is stirred alloy melt and was left standstill 10-15 minute at 740 ℃, leaves standstill and drags for the floating assorted of alloy melt surface after finishing, and casts then;
2) alloy that casting is obtained carries out ageing treatment.
3, according to the described method of claim, it is characterized in that described ageing treatment is: alloy is put into the electric furnace that leads to protective atmosphere, be incubated 15-40 hour down at 200-300 ℃, in the cold water of quenching then.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982553A (en) * | 2010-09-21 | 2011-03-02 | 华南理工大学 | Heat resistant magnesium alloy without Al and preparation method thereof |
| CN101985712A (en) * | 2010-12-08 | 2011-03-16 | 重庆理工大学 | Method for thinning Mg-RE-Mn-Sc series magnesium alloy crystalline grains by adding Zr |
| CN101985713A (en) * | 2010-12-09 | 2011-03-16 | 重庆理工大学 | Method for refining CaMgSn phase in Mg-Sn-Ca series magnesium alloy by adding Sr |
| CN102383012A (en) * | 2011-11-01 | 2012-03-21 | 西安理工大学 | Low-rare-earth high-strength heat-resisting magnesium alloy and preparation method thereof |
| CN104451315A (en) * | 2014-12-23 | 2015-03-25 | 常熟市凯波冶金建材机械设备厂 | Inner frame of gas turbine |
| CN104451306A (en) * | 2014-12-23 | 2015-03-25 | 常熟市凯波冶金建材机械设备厂 | Bearing seat for gas turbine |
| CN107250402A (en) * | 2015-02-26 | 2017-10-13 | 株式会社栗本铁工所 | Heat resistance magnesium alloy |
| CN109161752A (en) * | 2018-10-17 | 2019-01-08 | 上海海洋大学 | A kind of heat-resistant creep-resistant magnesium alloy and preparation method thereof |
| CN113684406A (en) * | 2021-08-26 | 2021-11-23 | 承德石油高等专科学校 | Scandium-containing high-strength extruded Mg-Sn-Ca alloy and preparation method thereof |
| CN113718146A (en) * | 2021-09-03 | 2021-11-30 | 承德石油高等专科学校 | Mg-Sn-Ce-Ag-Sc alloy and preparation method thereof |
| CN115896571A (en) * | 2022-11-28 | 2023-04-04 | 东北大学 | Heat-resistant light magnesium alloy and preparation method thereof |
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2008
- 2008-12-23 CN CN200810237215XA patent/CN101440449B/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982553A (en) * | 2010-09-21 | 2011-03-02 | 华南理工大学 | Heat resistant magnesium alloy without Al and preparation method thereof |
| CN101982553B (en) * | 2010-09-21 | 2012-08-08 | 华南理工大学 | Heat resistant magnesium alloy without Al and preparation method thereof |
| CN101985712A (en) * | 2010-12-08 | 2011-03-16 | 重庆理工大学 | Method for thinning Mg-RE-Mn-Sc series magnesium alloy crystalline grains by adding Zr |
| CN101985712B (en) * | 2010-12-08 | 2012-06-27 | 重庆理工大学 | Method for thinning Mg-RE-Mn-Sc series magnesium alloy crystalline grains by adding Zr |
| CN101985713A (en) * | 2010-12-09 | 2011-03-16 | 重庆理工大学 | Method for refining CaMgSn phase in Mg-Sn-Ca series magnesium alloy by adding Sr |
| CN102383012A (en) * | 2011-11-01 | 2012-03-21 | 西安理工大学 | Low-rare-earth high-strength heat-resisting magnesium alloy and preparation method thereof |
| CN102383012B (en) * | 2011-11-01 | 2013-06-05 | 西安理工大学 | Low-rare-earth high-strength heat-resisting magnesium alloy and preparation method thereof |
| CN104451306A (en) * | 2014-12-23 | 2015-03-25 | 常熟市凯波冶金建材机械设备厂 | Bearing seat for gas turbine |
| CN104451315A (en) * | 2014-12-23 | 2015-03-25 | 常熟市凯波冶金建材机械设备厂 | Inner frame of gas turbine |
| CN107250402A (en) * | 2015-02-26 | 2017-10-13 | 株式会社栗本铁工所 | Heat resistance magnesium alloy |
| US10550453B2 (en) | 2015-02-26 | 2020-02-04 | Kurimoto, Ltd. | Heat-resistant magnesium alloy |
| CN109161752A (en) * | 2018-10-17 | 2019-01-08 | 上海海洋大学 | A kind of heat-resistant creep-resistant magnesium alloy and preparation method thereof |
| CN109161752B (en) * | 2018-10-17 | 2020-09-04 | 上海海洋大学 | Heat-resistant creep-resistant magnesium alloy and preparation method thereof |
| CN113684406A (en) * | 2021-08-26 | 2021-11-23 | 承德石油高等专科学校 | Scandium-containing high-strength extruded Mg-Sn-Ca alloy and preparation method thereof |
| CN113718146A (en) * | 2021-09-03 | 2021-11-30 | 承德石油高等专科学校 | Mg-Sn-Ce-Ag-Sc alloy and preparation method thereof |
| CN115896571A (en) * | 2022-11-28 | 2023-04-04 | 东北大学 | Heat-resistant light magnesium alloy and preparation method thereof |
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