CN103849802A - Magnesium-rare earth-boron alloy with high heat resistance and preparation method thereof - Google Patents
Magnesium-rare earth-boron alloy with high heat resistance and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a magnesium-rare earth-boron alloy with high heat resistance. The chemical formula is Mg-xRE-yB, wherein RE represents one or more of 17 rare earth elements. When many rare earth elements coexist, the mass fractions of the rare earth elements are equal; x and y are mass fractions, x is greater than or equal to 7% but less than or equal to 12% while y is greater than or equal to 0.05% but less than or equal to 3%. The preparation method provided by the invention mainly comprises the following steps: carrying out surface pre-treatment on a magnesium-rare earth alloy; grinding, polishing and cleaning; wrapping the magnesium-rare earth alloy by boron nitride through a cold press; assembling to a high-pressure test sample; placing the sample in a high-pressure cubic press for high-pressure boriding to obtain the magnesium-rare earth-boron alloy comprising a boron-rare earth compound. The method provided by the invention is simple and easy to control, and low in cost. The high-pressure boriding process is safe and non-toxic so as to avoid the environmental pollution caused by harmful gases. The prepared magnesium-rare earth-boron alloy can be used for a long time at a temperature of 300 DEG C.
Description
Technical field
The present invention relates to a kind of Alloy And Preparation Method.
Background technology
Magnesium alloy is as the commercial metal engineering structured material of at present lightweight, and in modern industry, application is more and more wider.Compared with other metallic substance, magnesium alloy has that density is little, high specific strength, high specific stiffness, good thermal conductivity and electroconductibility, good dimensional stability, electromagnetic wave shielding and be easy to the characteristics such as recovery.Although magnesium alloy has plurality of advantages, still there is thermo-labile, the shortcoming such as resistance to corrosion is poor and temperature-room type plasticity is low.The resistance to elevated temperatures of general magnesium alloy is poor, and working temperature can not exceed 120-150 DEG C, and this has just limited its widespread use greatly.
Present stage, the high-temperature behavior that is used for improving magnesium alloy by the comprehensive utilization of the several different methods such as strain-hardening, grain refining, alloying, thermal treatment, magnesium alloy and ceramic phase meet or these methods, turns to the most basic, the most frequently used and the most effective enhanced processing method at these treatment process interalloies.The heat-resistant magnesium alloy (CN102171374B) of Toyota Jidoshokki KK, this alloy has added Al, Ca and Mn element, these compounds have formed crystalline compounds at the grain boundaries of magnesium crystal grain, make this magnesium alloy at high temperature, be also difficult for occurring bottom surface and slide, at high temperature show higher mechanical property, but it is too single to add element, the easily excessive impact that causes other performance of alloy of element, high temperature creep property is poor simultaneously, and service temperature is no more than 230 DEG C.A kind of heat resistance magnesium alloy (CN101818293B) of Guangzhou Research Institute of Nonferrous Metals, this alloy has added Al, Zn, Si, Ca and Sr element, Al and Zn element have reinforced alloys effect, form dystectic Mg2Si phase simultaneously, Ca and Sr element play crystal grain thinning and metamorphism, this alloy has good Microstructure and properties, and the tensile strength of 150 DEG C and elongation are greater than 120MPa and 20%, but not satisfactory in the mechanical property of higher temperature.A kind of heat resisting magnesium-rare earth alloy of University Of Science and Technology Of He'nan and preparation method thereof (CN101532107B), this alloy has added Gd, Y, Sm, Zr and Sb element, there is very high tensile strength, 300 DEG C time, tensile strength is still up to 309MPa, but the mass percent of rare earth element reaches 13-18%, cost of alloy is higher, and high temperature creep property is poor, at high temperature can not life-time service.In sum, the precipitation hardening effect under alloying action, due to precipitated phase poor heat stability, makes its phase alligatoring in pyroprocess, thereby causes alloy intensity and creep-resistant property at high temperature to reduce.
Summary of the invention
The object of the present invention is to provide that a kind of technique is simple, with low cost, the high heat resistance magnesium rare earth-boron Alloy And Preparation Method of safety non-toxic.The present invention is mainly taking cheap boron nitride as boron source, makes the magnesium rare earth-boron alloy that contains boron rare earth compound by high pressure boronizing method.
The chemical molecular formula of high heat resistance magnesium rare earth-boron alloy of the present invention is Mg-xRE-yB, wherein RE represents one or more in 17 kinds of rare earth elements (Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), in the time that multiple rare earth element coexists, each rare earth element massfraction equalization.X, y are massfraction, 7%≤x≤12%, 0.5%≤y≤3%.
Preparation method of the present invention is as follows:
1, magnesium-rare earth alloy surface preparation:
First, by clean the polishing of magnesium-rare earth alloy sand for surface paper, select successively 150#, 320#, 600#, 1200#, 2000# sand paper alloy surface to polish, range estimation magnesium-rare earth alloy surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium-rare earth alloy material surface is polished to cut and disappear.Finally polished magnesium-rare earth alloy is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 10-15min.
2, assembling high-voltage samples
The magnesium-rare earth alloy of first with chilling press, step 1 being processed wraps up with boron nitride powder, then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium-rare earth alloy after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at top, finally respectively its top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter, carbon tube after sealing is put into the circular hole mid-way in the middle of a cubes pyrophyllite block, and two conducting steel rings are put at carbon tube two ends again.
3, high pressure boronising
The high-voltage samples that step 2 is assembled is placed on the cavity position of high pressure six-plane piercer, tup aligns laggard horizontal high voltage boronising, pressure is increased to 6GPa, temperature is increased to 1000-1400 DEG C by temperature rise rate with 10 DEG C/min, insulation 30-120min, then powered-down stops heating, and air cooling is to room temperature, after release, take out high-voltage samples, obtain the magnesium rare earth-boron alloy that contains boron rare earth compound.
The present invention compared with prior art tool has the following advantages:
1, using cheap boron nitride powder as single boron source, reduce the kind of boronizing agent, be easy to preparation, reduce production cost, avoid the pollution of obnoxious flavour to environment.
2, boriding process is simple, without adding catalyzer and shielding gas, gets final product nitriding in air;
3, the ideal thickness of nitrided case, and generate boron rare earth compound dissolve in magnesium matrix as precipitated phase, be combined with magnesium matrix closely;
4, the boron rare earth compound generating has good thermostability, effectively raises hot strength and the creep property of magnesium-rare earth alloy, can be at 300 DEG C of temperature life-time service.
Embodiment:
Embodiment 1
Mg-8wt.%Gd magnesium gadolinium alloys is cut into the right cylinder sample of Φ 6.5mm × 8mm, use successively 150#, 320#, 600#, 1200#, 2000# sand paper clean magnesium gadolinium alloys surface finish, range estimation magnesium gadolinium alloys surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium gadolinium alloys surface finish to cut is disappeared.Finally polished magnesium gadolinium alloys is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 10min.
First with chilling press by boron nitride powder parcel cheap for above-mentioned magnesium gadolinium alloys, then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium gadolinium alloys after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at carbon tube top, finally respectively carbon tube top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter.The carbon tube of sealing is put into the fast middle circular hole mid-way of a cubes agalmatolite, and two conducting steel rings are put at carbon tube two ends again, complete the assembling of high-voltage samples.
The above-mentioned high-voltage samples assembling is placed on to the cavity position of high pressure cubic apparatus, tup aligns laggard horizontal high voltage boronising pressure is increased to 6GPa, temperature is increased to 1200 DEG C by temperature rise rate with 10 DEG C/min, at 1200 DEG C of insulation 30min, then powered-down stops heating, air cooling, to room temperature, takes out sample after release, obtain containing GdB
12magnesium gadolinium boron (Mg-Gd-B) alloy of precipitated phase.This alloying constituent is Mg-7Gd-0.5B alloy after testing, and its tensile strength at 300 DEG C is 314MPa, and unit elongation reaches 43.6%(in table 1).
Embodiment 2
Mg-5wt.%La-5wt.%Ce magnesium lanthanum cerium alloy is cut into the right cylinder sample of Φ 6.5mm × 8mm, use successively 150#, 320#, 600#, 1200#, 2000# sand paper clean magnesium gadolinium alloys surface finish, range estimation magnesium lanthanum cerium alloy surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium lanthanum cerium alloy surface finish to cut is disappeared.Finally polished magnesium lanthanum cerium alloy is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 15min.
First with chilling press by boron nitride powder parcel cheap for above-mentioned magnesium lanthanum cerium alloy, then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium lanthanum cerium alloy after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at carbon tube top, finally respectively carbon tube top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter.The carbon tube of sealing is put into the fast middle circular hole mid-way of a cubes agalmatolite, and two conducting steel rings are put at carbon tube two ends again, complete the assembling of high-voltage samples.
The above-mentioned high-voltage samples assembling is placed on to the cavity position of high pressure six-plane piercer, tup aligns laggard horizontal high voltage boronising pressure is increased to 6GPa, temperature is increased to 1400 DEG C by temperature rise rate with 10 DEG C/min, at 1400 DEG C of temperature insulation 50min, then powered-down stops heating, air cooling, to room temperature, takes out sample after release, obtain containing LaB
6, CeB
6magnesium lanthanum cerium boron (Mg-LaCe-B) alloy of precipitated phase.This alloying constituent is Mg-4La4Ce-1.8B alloy after testing, and its tensile strength at 300 DEG C is 300MPa, and unit elongation reaches 38.1%(in table 1).
Embodiment 3
Mg-5wt.%Nd-5wt.%Tb-5wt.%Tm magnesium neodymium terbium thulium alloy is cut into the right cylinder sample of Φ 6.5mm × 8mm, use successively 150#, 320#, 600#, 1200#, 2000# sand paper clean magnesium neodymium terbium thulium alloy surface finish, range estimation magnesium neodymium terbium thulium alloy surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium neodymium terbium thulium alloy surface finish to cut is disappeared.Finally polished magnesium neodymium terbium thulium alloy is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 12min.
First with chilling press by boron nitride powder parcel cheap for above-mentioned magnesium neodymium terbium thulium alloy, then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium neodymium terbium thulium alloy after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at carbon tube top, finally respectively carbon tube top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter.The carbon tube of sealing is put into the fast middle circular hole mid-way of a cubes agalmatolite, and two conducting steel rings are put at carbon tube two ends again, complete the assembling of high-voltage samples.
The above-mentioned high-voltage samples assembling is placed on to the cavity position of high pressure six-plane piercer, tup aligns laggard horizontal high voltage boronising pressure is increased to 6GPa, temperature is increased to 1300 DEG C by temperature rise rate with 10 DEG C/min, at 1300 DEG C of insulation 100min, then powered-down stops heating, air cooling, to room temperature, takes out sample after release, obtain containing NdB
6, TbB
12and TmB
12magnesium neodymium terbium thulium boron (Mg-NdTbTm-B) alloy of precipitated phase.This alloying constituent is Mg-4Nd4Tb4Tm-3B alloy after testing, and its tensile strength at 300 DEG C is 310MPa, and unit elongation reaches 42.3%(in table 1).
Embodiment 4
Mg-4wt.%Y-4wt.%Eu-4wt.%Lu magnesium yttrium europium lutetium alloy is cut into the right cylinder sample of Φ 6.5mm × 8mm, use successively 150#, 320#, 600#, 1200#, 2000# sand paper clean magnesium yttrium europium lutetium alloy surface finish, range estimation magnesium yttrium europium lutetium alloy surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium yttrium europium lutetium alloy surface finish to cut is disappeared.Finally polished magnesium yttrium europium lutetium alloy is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 11min.
First with chilling press by boron nitride powder parcel cheap for above-mentioned magnesium yttrium europium lutetium alloy, then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium yttrium europium lutetium alloy after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at carbon tube top, finally respectively carbon tube top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter.The carbon tube of sealing is put into the fast middle circular hole mid-way of a cubes agalmatolite, and two conducting steel rings are put at carbon tube two ends again, complete the assembling of high-voltage samples.
The above-mentioned high-voltage samples assembling is placed on to the cavity position of high pressure six-plane piercer, tup aligns laggard horizontal high voltage boronising pressure is increased to 6GPa, temperature is increased to 1400 DEG C by temperature rise rate with 10 DEG C/min, at 1400 DEG C of insulation 80min, then powered-down stops heating, air cooling, to room temperature, takes out sample after release, obtain containing YB
12, EuB
6and LuB
12magnesium yttrium europium lutetium boron (Mg-YEuLu-B) alloy of precipitated phase.This alloying constituent is Mg-3Y3Eu3Lu-1.8B alloy after testing, and its tensile strength at 300 DEG C is 304MPa, and unit elongation reaches 38.7%(in table 1).
Embodiment 5
Mg-4wt.%Yb-4wt.%Pr-4wt.%Ho-4wt.%Sc magnesium ytterbium praseodymium holmium scandium alloy is cut into the right cylinder sample of Φ 6.5mm × 8mm, use successively 150#, 320#, 600#, 1200#, 2000# sand paper clean magnesium ytterbium praseodymium holmium scandium alloy surface finish, range estimation magnesium ytterbium praseodymium holmium scandium alloy surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium ytterbium praseodymium holmium scandium alloy surface finish to cut is disappeared.Finally polished magnesium ytterbium praseodymium holmium scandium alloy is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 15min.
First with chilling press by boron nitride powder parcel cheap for above-mentioned magnesium ytterbium praseodymium holmium scandium alloy, then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium ytterbium praseodymium holmium scandium alloy after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at carbon tube top, finally respectively carbon tube top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter.The carbon tube of sealing is put into the fast middle circular hole mid-way of a cubes agalmatolite, and two conducting steel rings are put at carbon tube two ends again, complete the assembling of high-voltage samples.
The above-mentioned high-voltage samples assembling is placed on to the cavity position of high pressure six-plane piercer, tup aligns laggard horizontal high voltage boronising pressure is increased to 6GPa, temperature is increased to 1000 DEG C by temperature rise rate with 10 DEG C/min, at 1000 DEG C of insulation 120min, then powered-down stops heating, air cooling, to room temperature, takes out sample after release, obtain containing YbB
12, PrB
6, HoB
12and ScB
12magnesium ytterbium praseodymium holmium scandium boron (Mg-YbPrHoSc-B) alloy of precipitated phase.This alloying constituent is Mg-3Yb3Pr3Ho3Sc-2.4B alloy after testing, and its tensile strength at 300 DEG C is 298MPa, and unit elongation reaches 40.1%(in table 1).
Embodiment 6
Mg-3wt.%Dy-3wt.%Pm-3wt.%Er-3wt.%Sm magnesium dysprosium praseodymium erbium samarium alloy is cut into the right cylinder sample of Φ 6.5mm × 8mm, use successively 150#, 320#, 600#, 1200#, 2000# sand paper clean magnesium dysprosium praseodymium erbium samarium alloy surface finish, range estimation magnesium dysprosium praseodymium erbium samarium alloy surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium dysprosium praseodymium erbium samarium alloy surface finish to cut is disappeared.Finally polished magnesium dysprosium praseodymium erbium samarium alloy is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 14min.
First with chilling press by boron nitride powder parcel cheap for above-mentioned magnesium dysprosium praseodymium erbium samarium alloy, then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium dysprosium praseodymium erbium samarium alloy after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at carbon tube top, finally respectively carbon tube top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter.The carbon tube of sealing is put into the fast middle circular hole mid-way of a cubes agalmatolite, and two conducting steel rings are put at carbon tube two ends again, complete the assembling of high-voltage samples.
The above-mentioned high-voltage samples assembling is placed on to the cavity position of high pressure six-plane piercer, tup aligns laggard horizontal high voltage boronising pressure is increased to 6GPa, temperature is increased to 1400 DEG C by temperature rise rate with 10 DEG C/min, at 1400 DEG C of insulation 60min, then powered-down stops heating, air cooling, to room temperature, takes out sample after release, obtain containing DyB
12, PmB
6, ErB
12and SmB
12magnesium dysprosium praseodymium erbium samarium boron (Mg-DyPmErSm-B) alloy of precipitated phase.This alloying constituent is Mg-2Dy2Pm2Er2Sm-2.7B alloy after testing, and its tensile strength at 300 DEG C is 307MPa, and unit elongation reaches 39.1%(in table 1).
Table 1: tensile strength and the unit elongation of the alloy obtaining in each embodiment in the time of 300 DEG C
| Alloying constituent | Tensile strength | Unit elongation |
| Mg-7Gd-0.5B | 314MPa | 43.6％ |
| Mg-4La4Ce-1.8B | 300MPa | 38.1％ |
| Mg-4NdTb4Tm-3B | 310MPa | 42.3％ |
| Mg-3Y3Eu3Lu-1.8B | 304MPa | 38.7％ |
| Mg-3Yb3Pr3Ho3Sc-2.4B | 298MPa | 40.1％ |
| Mg-2Dy2Pm2Er2Sm-2.7B | 307MPa | 39.1％ |
Claims (2)
1. a high heat resistance magnesium rare earth-boron alloy, it is characterized in that: its chemical molecular formula is Mg-xRE-yB, wherein RE represents one or more in 17 kinds of rare earth Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, in the time that multiple rare earth element coexists, each rare earth element massfraction equalization; X, y are massfraction, 7%≤x≤12%, 0.5%≤y≤3%.
2. the preparation method of a kind of high heat resistance magnesium rare earth-boron alloy claimed in claim 1, is characterized in that:
(1) magnesium-rare earth alloy surface preparation:
First, by clean the polishing of magnesium-rare earth alloy sand for surface paper, select successively 150#, 320#, 600#, 1200#, 2000# sand paper alloy surface to polish, range estimation magnesium-rare earth alloy surface scratch direction unanimously, then use deionized water rinsing, utilize polishing cloth to adopt the mode of water throwing that magnesium-rare earth alloy material surface is polished to cut and disappear.Finally polished magnesium-rare earth alloy is carried out to ultrasonic cleaning with Ultrasonic Cleaners, taking dehydrated alcohol as clean-out system, cleaning temperature is 15 DEG C, and scavenging period is 10-15min;
(2) assembling high-voltage samples:
First wrap up with the magnesium-rare earth alloy boron nitride powder that chilling press is processed step (1), then first place a columniform pyrophyllite block identical with its internal diameter in carbon tube bottom, magnesium-rare earth alloy after parcel is close to bottom pyrophyllite block and puts into carbon tube, put into again a same cylindrical pyrophyllite block at top, finally respectively its top and bottom are sealed with two diameter graphite flakes identical with carbon tube external diameter, carbon tube after sealing is put into the circular hole mid-way in the middle of a cubes pyrophyllite block, and two conducting steel rings are put at carbon tube two ends again;
(3) high pressure boronising:
The high-voltage samples that step (2) is assembled is placed on the cavity position of high pressure six-plane piercer, tup aligns laggard horizontal high voltage boronising, pressure is increased to 6GPa, temperature is increased to 1000-1400 DEG C by temperature rise rate with 10 DEG C/min, insulation 30-120min, then powered-down stops heating, and air cooling is to room temperature, after release, take out high-voltage samples, obtain the magnesium rare earth-boron alloy that contains boron rare earth compound.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388784A (en) * | 2014-12-15 | 2015-03-04 | 春兴精工（常熟）有限公司 | Method for preparing magnesium alloy with high tensile strength |
| CN104404331A (en) * | 2014-12-15 | 2015-03-11 | 春兴精工（常熟）有限公司 | Preparation method for magnesium alloy with high tensile strength |
| CN104480363A (en) * | 2014-12-15 | 2015-04-01 | 苏州昊卓新材料有限公司 | Preparation method of high-ductility magnesium alloy |
| CN108359871A (en) * | 2018-05-18 | 2018-08-03 | 燕山大学 | Rare earth boron group compound aluminium alloy fining agent and preparation method thereof |
| CN110468318A (en) * | 2019-07-29 | 2019-11-19 | 卜乐平 | A kind of boron magnesium-rare earth and its hot chamber diecasting, which squeeze casting feeding in time and then squeeze, enhances continuous producing method |
| CN110885935A (en) * | 2019-12-02 | 2020-03-17 | 中北大学 | Casting method suitable for Mg-Al alloy grain refinement |
| CN111072041A (en) * | 2019-12-24 | 2020-04-28 | 燕山大学 | Method for rapidly preparing two-dimensional boron alkene |
| CN115627440A (en) * | 2022-10-21 | 2023-01-20 | 中南大学 | LaB6 enhanced aluminum-chromium-silicon solid powder aluminizing agent and aluminizing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421968A (en) * | 2013-08-23 | 2013-12-04 | 内蒙古农业大学 | Preparation method of high-strength boron rare-earth magnesium alloy |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421968A (en) * | 2013-08-23 | 2013-12-04 | 内蒙古农业大学 | Preparation method of high-strength boron rare-earth magnesium alloy |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388784A (en) * | 2014-12-15 | 2015-03-04 | 春兴精工（常熟）有限公司 | Method for preparing magnesium alloy with high tensile strength |
| CN104404331A (en) * | 2014-12-15 | 2015-03-11 | 春兴精工（常熟）有限公司 | Preparation method for magnesium alloy with high tensile strength |
| CN104480363A (en) * | 2014-12-15 | 2015-04-01 | 苏州昊卓新材料有限公司 | Preparation method of high-ductility magnesium alloy |
| CN108359871A (en) * | 2018-05-18 | 2018-08-03 | 燕山大学 | Rare earth boron group compound aluminium alloy fining agent and preparation method thereof |
| CN110468318A (en) * | 2019-07-29 | 2019-11-19 | 卜乐平 | A kind of boron magnesium-rare earth and its hot chamber diecasting, which squeeze casting feeding in time and then squeeze, enhances continuous producing method |
| CN110885935A (en) * | 2019-12-02 | 2020-03-17 | 中北大学 | Casting method suitable for Mg-Al alloy grain refinement |
| CN110885935B (en) * | 2019-12-02 | 2021-10-26 | 中北大学 | Casting method suitable for Mg-Al alloy grain refinement |
| CN111072041A (en) * | 2019-12-24 | 2020-04-28 | 燕山大学 | Method for rapidly preparing two-dimensional boron alkene |
| CN115627440A (en) * | 2022-10-21 | 2023-01-20 | 中南大学 | LaB6 enhanced aluminum-chromium-silicon solid powder aluminizing agent and aluminizing method |
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