CN101177742A - Method for in-situ preparation of TiBO2 reinforced magnesium-based composite material - Google Patents
Method for in-situ preparation of TiBO2 reinforced magnesium-based composite material Download PDFInfo
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- 239000011777 magnesium Substances 0.000 title claims abstract description 52
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 38
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 21
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 229910052790 beryllium Inorganic materials 0.000 claims abstract description 3
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 19
- 238000002844 melting Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 10
- 239000000463 material Substances 0.000 claims 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- 238000009413 insulation Methods 0.000 claims 2
- 238000003723 Smelting Methods 0.000 claims 1
- 230000004927 fusion Effects 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 14
- 229910001610 cryolite Inorganic materials 0.000 abstract description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 2
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 abstract description 2
- 229910033181 TiB2 Inorganic materials 0.000 abstract description 2
- 239000003063 flame retardant Substances 0.000 abstract description 2
- 239000000155 melt Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 229910020491 K2TiF6 Inorganic materials 0.000 abstract 1
- 229910020261 KBF4 Inorganic materials 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 230000002787 reinforcement Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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Abstract
一种复合材料技术领域的原位制备TiB2颗粒增强镁基复合材料的方法，步骤为：将K2TiF6，KBF4和Na3AlF6粉末混合均匀，放入烘干炉中烘干，得到无水粉末，在电阻炉中将Al锭熔化，并保温均匀化；将经过烘干的无水粉末分批加入得到熔融Al熔体液面上，并用石墨圆盘搅拌，搅拌结束后静置，除去熔体表面的浮渣，得到TiB2－Al中间合金；镁合金在SF6和CO2混合气体的保护下熔炼，并加入阻燃元素铍；将TiB2－Al中间合金缓慢加入到得到的镁合金熔液中，搅拌，静置，浇注。本发明工艺相对简单，成本低，TiB2/Mg复合材料密度在1.8－2.0g/cm3之间，其抗拉强度比基体合金增加了60％以上。A method for in - situ preparation of TiB2 particle-reinforced magnesium-based composite materials in the technical field of composite materials, the steps are: uniformly mix K2TiF6 , KBF4 and Na3AlF6 powders, put them into a drying furnace for drying, To obtain anhydrous powder, melt the Al ingot in a resistance furnace, and keep it homogenized; add the dried anhydrous powder in batches to obtain the liquid surface of the molten Al melt, and stir with a graphite disc, and let it stand after the stirring , remove the scum on the surface of the melt, and obtain the TiB 2 -Al master alloy; the magnesium alloy is smelted under the protection of the mixed gas of SF 6 and CO 2 , and add the flame retardant element beryllium; slowly add the TiB 2 -Al master alloy to get In the molten magnesium alloy, stir, stand still, and pour. The invention has relatively simple process and low cost, and the density of the TiB 2 /Mg composite material is between 1.8-2.0 g/cm 3 , and its tensile strength is increased by more than 60% compared with the matrix alloy.
Description
技术领域technical field
本发明涉及的是一种复合材料技术领域的制备方法，特别是一种原位制备TiB2颗粒增强镁基复合材料的方法。The invention relates to a preparation method in the technical field of composite materials, in particular to a method for in-situ preparation of TiB2 particle-reinforced magnesium-based composite materials.
背景技术Background technique
镁基复合材料由于具有高的比强度，比模量以及良好的耐磨性能，耐高温性能和阻尼性能，在航空航天，汽车工业具有潜在的应用前景和广阔的市场。镁基复合材料的前期研究工作主要集中于外加法制备的镁基复合材料，但是由于增强体与基体合金之间润湿性较差，增强相与基体界面热力学上不稳定，同时再加上二者的比重差异而导致复合材料制备过程中颗粒容易偏聚和聚集，进一步导致镁基复合材料的制备困难，工艺复杂，复合材料的性能与预期的性能无法相比。采用原位制备颗粒增强镁基复合材料可解决外加法所产生的界面反应，润湿性差和强化效果有限等问题。因此近年来原位镁基复合材料的研究倍受重视。许多研究者已经开始了这方面的探索。但相对于外加镁基复合材料和原位铝基、钛基复合材料的发展，原位自生镁基复合材料的研究和开发刚刚开始，相关的研究、报道还不够，还要做大量的工作。原位镁基复合材料所面临的迫切解决的首要问题就是制备工艺的进一步完善。考虑到镁的易反应性，易燃烧，易腐蚀，镁基体与增强体的浸润性的限制，镁基复合材料的本质特点限制了工艺手段的选择。原位制备技术发展到现在，已有十多种方法，但能在镁基复合材料中应用的却很有限。Due to its high specific strength, specific modulus, good wear resistance, high temperature resistance and damping performance, magnesium-based composite materials have potential application prospects and broad markets in the aerospace and automotive industries. The previous research work on magnesium-based composites mainly focused on the magnesium-based composites prepared by the external addition method. However, due to the poor wettability between the reinforcement and the matrix alloy, the interface between the reinforcement phase and the matrix is thermodynamically unstable. Due to the difference in specific gravity, the particles are easy to segregate and aggregate during the preparation of composite materials, which further leads to difficulties in the preparation of magnesium-based composite materials, complicated processes, and the performance of composite materials cannot be compared with the expected performance. The in-situ preparation of particle-reinforced magnesium-based composites can solve the problems of interfacial reaction, poor wettability and limited strengthening effect caused by the external addition method. Therefore, research on in-situ magnesium-based composites has attracted much attention in recent years. Many researchers have already started exploring in this area. However, compared with the development of external magnesium-based composite materials and in-situ aluminum-based and titanium-based composite materials, the research and development of in-situ self-generated magnesium-based composite materials has just begun, and related research and reports are not enough, and a lot of work needs to be done. The most urgent problem facing in-situ magnesium-based composites is to further improve the preparation process. Considering the easy reactivity of magnesium, easy to burn, easy to corrode, and the limitation of the wettability of magnesium matrix and reinforcement, the essential characteristics of magnesium matrix composite materials limit the choice of process means. In-situ preparation technology has been developed to the present, and there are more than ten methods, but the application in magnesium-based composites is very limited.
经对现有技术的文献检索发现，围绕镁基复合材料的制备方法，有不少文献报道，如中国专利申请号03116169.3，名称为：“混合盐法制备原位增强镁基复合材料工艺”。该专利的技术特点在于将混合盐直接加入镁熔体后，进行搅拌浇注，得到原位镁基复合材料。但是镁在高温下容易燃烧，混合盐直接加入镁熔体中，对反应气氛，反应温度有着严格的要求，在实际生产中不易控制，所以上述原位增强镁基复合材料工艺存在一定的局限。After searching the literature of the prior art, it is found that there are many literature reports on the preparation method of magnesium-based composite materials, such as Chinese patent application number 03116169.3, which is named: "Preparation of In-situ Reinforced Magnesium-based Composite Materials by Mixed Salt Method". The technical feature of this patent is that after the mixed salt is directly added to the magnesium melt, it is stirred and poured to obtain an in-situ magnesium-based composite material. However, magnesium is easy to burn at high temperature, and the mixed salt is directly added to the magnesium melt, which has strict requirements on the reaction atmosphere and reaction temperature, which is difficult to control in actual production, so the above-mentioned in-situ reinforced magnesium-based composite material process has certain limitations.
发明内容Contents of the invention
本发明目的是针对现有技术的不足，提供一种原位制备TiB2颗粒增强镁基复合材料的方法，使其采用传统铸造法制备原位生成颗粒增强镁基复合材料，省去了增强相单独合成、处理和加入等程序，从而具有工艺简单、制备成本低等优点。The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for in-situ preparation of TiB 2 particle-reinforced magnesium-based composite material, so that the traditional casting method is used to prepare the in-situ-generated particle-reinforced magnesium-based composite material, eliminating the need for a reinforcing phase Procedures such as synthesis, treatment and addition are performed separately, thereby having the advantages of simple process and low preparation cost.
本发明是通过以下技术方案实现的，采用铸造法制备TiB2颗粒增强镁基复合材料，通过把混合盐反应法原位生成的TiB2-Al中间合金，加入熔融镁液中并使用搅拌浇注而成。工艺简单易行，生成的增强相稳定，不含中间相，工艺过程包括中间合金的制备和增强颗粒在镁合金基体中的溶解扩散及弥散分布。The present invention is realized through the following technical scheme. The TiB 2 particle-reinforced magnesium-based composite material is prepared by a casting method, and the TiB 2 -Al master alloy generated in situ by the mixed salt reaction method is added into the molten magnesium liquid and stirred and casted. become. The process is simple and easy, and the generated reinforcing phase is stable without intermediate phase. The process includes the preparation of the intermediate alloy and the dissolution, diffusion and dispersion distribution of the reinforcing particles in the magnesium alloy matrix.
本发明包括以下步骤：The present invention comprises the following steps:
(1)将K2TiF6，KBF4和Na3AlF6粉末混合均匀，放入烘干炉中烘干，得到无水粉末；(1) Mix K 2 TiF 6 , KBF 4 and Na 3 AlF 6 powders evenly, put them in a drying furnace and dry them to obtain anhydrous powder;
(2)在电阻炉中将Al锭熔化，并保温均匀化；(2) Melting the Al ingot in a resistance furnace and homogenizing the heat preservation;
(3)将步骤(1)中经过烘干的无水粉末分批加入步骤(2)中得到熔融Al熔体液面上，并用石墨圆盘搅拌，搅拌结束后静置，除去熔体表面的浮渣，得到的TiB2-Al中间合金；(3) Add the dried anhydrous powder in step (1) in batches to obtain the liquid surface of the molten Al melt in step (2), and stir with a graphite disc, leave standstill after stirring, remove the melt surface Dross, resulting TiB 2 -Al master alloy;
(4)镁合金在SF6和CO2混合气体的保护下熔炼，并加入阻燃元素铍以防止镁燃烧；(4) Magnesium alloy is smelted under the protection of SF 6 and CO 2 mixed gas, and flame retardant element beryllium is added to prevent magnesium from burning;
(5)将步骤(3)中得到的TiB2-Al中间合金缓慢加入到步骤(4)中得到的镁合金熔液中，搅拌，静置，浇注。(5) Slowly add the TiB 2 -Al master alloy obtained in step (3) into the molten magnesium alloy obtained in step (4), stir, stand still, and pour.
步骤(1)中，所述的K2TiF6和KBF4按Ti∶B化学计量配比1∶2混合，Na3AlF6含量为添加K2TiF6、KBF4和Na3AlF6粉末总重量的5％-20％，粉末的烘干温度和时间为：100℃-250℃，1小时-5小时。In step (1), the K 2 TiF 6 and KBF 4 are mixed according to the Ti:B stoichiometric ratio of 1:2, and the Na 3 AlF 6 content is the total amount of K 2 TiF 6 , KBF 4 and Na 3 AlF 6 powders added 5%-20% by weight, the drying temperature and time of the powder are: 100°C-250°C, 1 hour-5 hours.
步骤(2)中，所述的Al锭加热熔化温度为700℃-850℃，保温均匀化时间为10分钟-30分钟。In step (2), the heating and melting temperature of the Al ingot is 700°C-850°C, and the homogenization time of the heat preservation is 10 minutes-30 minutes.
步骤(3)中，所述的用石墨圆盘搅拌，其搅拌速度范围在200r/min-1000r/min，搅拌时间为10分钟-60分钟，待搅拌停止后，静置时间为10分钟-30分钟。In step (3), the graphite disk is used for stirring, the stirring speed range is 200r/min-1000r/min, the stirring time is 10 minutes-60 minutes, after the stirring is stopped, the standing time is 10 minutes-30 minutes minute.
步骤(4)中，所述的镁合金熔炼温度为700℃-850℃。In step (4), the melting temperature of the magnesium alloy is 700°C-850°C.
步骤(5)中，所述的搅拌转速为200r/min-1000r/min，搅拌时间为10分钟-60分钟，静置时间为5分钟-30分钟。In step (5), the stirring speed is 200r/min-1000r/min, the stirring time is 10 minutes-60 minutes, and the standing time is 5 minutes-30 minutes.
本发明先在铝中通过混合盐法原位生成TiB2-Al中间合金，再将熔融的TiB2-Al中间合金加入熔融态的镁中，得到TiB2/Mg复合材料。TiB2颗粒在TiB2-Al中间合金中是纯净的且表面覆盖有铝，所以使得TiB2颗粒能在镁合金中有良好的润湿性。TiB2颗粒可以很容易的通过TiB2-Al中间合金熔入镁合金并均匀的分布在基体中。In the invention, the TiB 2 -Al master alloy is generated in situ in aluminum by a mixed salt method, and then the molten TiB 2 -Al master alloy is added into molten magnesium to obtain a TiB 2 /Mg composite material. The TiB 2 particles are pure in the TiB 2 -Al master alloy and the surface is covered with aluminum, so that the TiB 2 particles can have good wettability in the magnesium alloy. TiB 2 particles can be easily melted into the magnesium alloy through the TiB 2 -Al master alloy and evenly distributed in the matrix.
与目前已有的技术相比，本发明采用铸造法制备原位生成颗粒增强TiB2/Mg复合材料，克服了外加增强颗粒表面易氧化污染，与基体的润湿性差以及颗粒粗大且分布不均匀，易偏聚在晶界等问题，从而具有工艺简单、制备成本低等优点。由于TiB2增强颗粒是经混合盐反应在金属铝中反应生成的，与基体润湿性好，充分搅拌后在基体中分布均匀，增强相颗粒细小，增强效果显著，界面结合良好，工艺简单，易于控制，因此原位生成颗粒增强TiB2/Mg复合材料具有轻质高强的特点。TiB2/Mg复合材料密度在1.8-2.0g/cm3之间，其抗拉强度比基体合金增加了60％以上。本发明为镁基复合材料的原位制备实现多体系、多工艺提供了一个有效方法。Compared with the current existing technology, the present invention adopts the casting method to prepare in-situ particle-reinforced TiB 2 /Mg composite material, which overcomes the easy oxidation pollution on the surface of the external reinforcement particles, poor wettability with the matrix, and coarse and uneven distribution of particles , easy to segregate at grain boundaries and other problems, thus having the advantages of simple process and low preparation cost. Since the TiB 2 reinforcement particles are formed by the reaction of mixed salts in metal aluminum, they have good wettability with the matrix, and are evenly distributed in the matrix after being fully stirred. The particles of the reinforcement phase are fine, the reinforcement effect is remarkable, the interface is well bonded, and the process is simple. It is easy to control, so the in-situ particle-reinforced TiB 2 /Mg composite has the characteristics of light weight and high strength. The density of TiB 2 /Mg composite material is between 1.8-2.0g/cm 3 , and its tensile strength is more than 60% higher than that of the matrix alloy. The invention provides an effective method for the in-situ preparation of the magnesium-based composite material to realize multi-system and multi-process.
具体实施方式Detailed ways
下面对本发明的实施例作详细说明：本实施例在以本发明技术方案为前提下进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于下述的实施例。The embodiments of the present invention are described in detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following implementation example.
实施例1Example 1
制取4vol％TiB2增强镁基复合材料Preparation of 4vol% TiB 2 Reinforced Magnesium Matrix Composites
将粉末K2TiF6和KBF4以及冰晶石Na3AlF6混合均匀。两种盐K2TiF6和KBF4依Ti∶B的化学计量比1∶2混合，冰晶石Na3AlF6含量为粉末总量的5wt％，混合后在250℃预热1小时。金属铝锭加热至850℃左右熔化，并保温均匀化10分钟。混合粉末被加入熔融的铝中并以200r/min的速度搅拌，搅拌时间为60分钟。搅拌停止以后，静置20分钟，除渣，得到TiB2-Al中间合金。镁合金在混合气体SF6和CO2的保护下在800℃熔炼。在镁合金融化以后，TiB2-Al中间合金被缓慢加入的镁合金中。实施搅拌，搅拌转速为200r/min，搅拌时间30分钟。搅拌以后，静置5分钟，浇注成型。得到4vol％TiB2/Mg复合材料，其抗拉强度为300MPa。Mix powder K 2 TiF 6 and KBF 4 and cryolite Na 3 AlF 6 evenly. The two salts K 2 TiF 6 and KBF 4 were mixed according to the stoichiometric ratio of Ti:B 1:2, the content of cryolite Na 3 AlF 6 was 5wt% of the total powder, and preheated at 250°C for 1 hour after mixing. The metal aluminum ingot is heated to about 850°C to melt, and is kept homogenized for 10 minutes. The mixed powder was added into the molten aluminum and stirred at a speed of 200r/min for 60 minutes. After the stirring was stopped, it was left to stand for 20 minutes to remove the slag and obtain a TiB 2 -Al master alloy. Magnesium alloys were melted at 800 °C under the protection of the mixed gas SF6 and CO2 . After the magnesium alloy is melted, the TiB 2 -Al master alloy is slowly added to the magnesium alloy. Implement stirring, the stirring speed is 200r/min, and the stirring time is 30 minutes. After stirring, let it stand for 5 minutes, and pour it into shape. A 4vol% TiB 2 /Mg composite material was obtained with a tensile strength of 300MPa.
实施例2，Example 2,
制取2vol％TiB2增强镁基复合材料Preparation of 2vol% TiB 2 Reinforced Magnesium Matrix Composite
将K2TiF6和KBF4以及冰晶石Na3AlF6粉末混合均匀。两种盐K2TiF6和KBF4依Ti∶B的化学计量比1∶2混合，冰晶石Na3AlF6含量为粉末总量的20wt％，混合后在100℃预热5小时。Al锭加热至800℃左右熔化，并保温均匀化30分钟。混合粉末被加入熔融的铝中并不断搅拌。搅拌时间为10min，搅拌速度为1000rpm。搅拌停止后，静置10分钟，除渣，得到TiB2-Al中间合金。镁合金在混合气体SF6和CO2的保护下在700℃熔炼。在镁合金融化以后，TiB2-Al中间合金被缓慢加入不断搅动的镁合金中。搅拌10分钟，搅拌速度为1000rpm。搅拌停止后，静置60分钟，浇注。得到2vol％TiB2/Mg复合材料，其抗拉强度290MPa。Mix K 2 TiF 6 and KBF 4 and cryolite Na 3 AlF 6 powder evenly. The two salts K 2 TiF 6 and KBF 4 were mixed according to the stoichiometric ratio of Ti:B 1:2, the content of cryolite Na 3 AlF 6 was 20wt% of the total powder, and preheated at 100°C for 5 hours after mixing. The Al ingot is heated to about 800°C to melt, and is kept homogenized for 30 minutes. The mixed powder is added to the molten aluminum with constant stirring. The stirring time is 10min, and the stirring speed is 1000rpm. After the stirring was stopped, it was left to stand for 10 minutes to remove the slag and obtain a TiB 2 -Al master alloy. Magnesium alloys were melted at 700 °C under the protection of mixed gases SF6 and CO2 . After the magnesium alloy is melted, the TiB 2 -Al master alloy is slowly added to the constantly stirring magnesium alloy. Stir for 10 minutes at a stirring speed of 1000 rpm. After the stirring stopped, let stand for 60 minutes and pour. A 2vol% TiB 2 /Mg composite material with a tensile strength of 290MPa was obtained.
实施例3Example 3
制取1vol％TiB2增强镁基复合材料Preparation of 1vol% TiB 2 Reinforced Magnesium Matrix Composite
将K2TiF6和KBF4以及冰晶石Na3AlF6粉末混合均匀。两种盐K2TiF6和KBF4依Ti∶B的化学计量比1∶2混合，冰晶石Na3AlF6含量为混合粉末总量的10wt％，混合后在200℃预热3小时。Al锭加热至700℃左右熔化，并保温均匀化20分钟。混合粉末被加入熔融的铝中并实施搅拌。搅拌时间为30min，搅拌速度为400rpm。反应以后停止搅拌，静置30分钟，除渣，得到TiB2-Al中间合金。镁合金在混合气体SF6和CO2的保护下在850℃熔炼。在镁合金融化以后，TiB2-Al中间合金被缓慢加入熔融的镁合金中。搅拌60分钟，搅拌速度为600rpm。搅拌结束后，静置10分钟，浇注。得到1vol％TiB2/Mg复合材料，其抗拉强度270MPa。Mix K 2 TiF 6 and KBF 4 and cryolite Na 3 AlF 6 powder evenly. The two salts K 2 TiF 6 and KBF 4 were mixed according to the stoichiometric ratio of Ti:B 1:2, the content of cryolite Na 3 AlF 6 was 10wt% of the total mixed powder, and preheated at 200°C for 3 hours after mixing. The Al ingot is heated to about 700°C to melt, and is kept homogenized for 20 minutes. The mixed powder is added to the molten aluminum and stirred. The stirring time is 30min, and the stirring speed is 400rpm. After the reaction, stop stirring, let stand for 30 minutes, remove slag, and obtain TiB 2 -Al master alloy. Magnesium alloys were melted at 850 °C under the protection of the mixed gas SF6 and CO2 . After the magnesium alloy is melted, the TiB 2 -Al master alloy is slowly added to the molten magnesium alloy. Stir for 60 minutes at a stirring speed of 600 rpm. After stirring, let stand for 10 minutes and pour. A 1vol% TiB 2 /Mg composite material with a tensile strength of 270MPa was obtained.
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| CN102352449A (en) * | 2011-10-12 | 2012-02-15 | 南昌大学 | A kind of in-situ ZrB2 particle reinforced magnesium matrix composite material preparation method |
| WO2013023460A1 (en) * | 2012-03-07 | 2013-02-21 | 深圳市新星轻合金材料股份有限公司 | Cycled preparation method that uses mixture of sodium-based titanium and boron fluoride salts as intermediate raw material and produces titanium boride and simultaneously sodium cryolite |
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| CN103160777A (en) * | 2011-12-15 | 2013-06-19 | 中国科学院宁波材料技术与工程研究所 | Titanium diboride-nickel thin film with coating structure and preparation method thereof |
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| CN109943738A (en) * | 2019-05-15 | 2019-06-28 | 湖南科技大学 | A kind of aluminum-containing high modulus rare earth magnesium alloy and preparation method thereof |
| CN110938759A (en) * | 2019-11-26 | 2020-03-31 | 纽维科精密制造江苏有限公司 | Production process of in-situ self-generated aluminum-based composite material for aluminum profile |
| CN111822722A (en) * | 2020-06-30 | 2020-10-27 | 长沙新材料产业研究院有限公司 | TiAl/TiB for additive manufacturing2Method for preparing powder material |
| CN111822722B (en) * | 2020-06-30 | 2023-09-19 | 航天科工(长沙)新材料研究院有限公司 | TiAl/TiB for additive manufacturing 2 Preparation method of powder material |
| CN113798494A (en) * | 2021-08-12 | 2021-12-17 | 山东科技大学 | A kind of TiB2 particle reinforced magnesium matrix composite material and preparation method thereof |
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