CN113199023A - 电子束选区熔化成形用纳米颗粒增强Ti基复合材料粉末 - Google Patents
电子束选区熔化成形用纳米颗粒增强Ti基复合材料粉末 Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 38
- 238000010894 electron beam technology Methods 0.000 title claims abstract description 17
- 230000008018 melting Effects 0.000 title claims abstract description 14
- 238000002844 melting Methods 0.000 title claims abstract description 14
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 239000002105 nanoparticle Substances 0.000 title abstract description 15
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 15
- 238000000498 ball milling Methods 0.000 claims abstract description 7
- 238000004137 mechanical activation Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 19
- 239000000919 ceramic Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 7
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims description 2
- 229910033181 TiB2 Inorganic materials 0.000 claims description 2
- 229910000568 zirconium hydride Inorganic materials 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 3
- 239000010936 titanium Substances 0.000 description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000000707 layer-by-layer assembly Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011208 reinforced composite material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- B33Y40/10—Pre-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B33Y70/00—Materials specially adapted for additive manufacturing
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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Abstract
本发明记载了一种电子束选区熔化成形用纳米颗粒增强Ti基复合材料粉末，该粉末经机械活化处理。本发明由于不使用溶液和电解质，避免了致使杂质元素残留，纳米粒子在球磨过程中与Ti合金粉末结合强度大大提高，有助于防止纳米粒子在电子束作用下电荷积聚、被斥力吹散，达不到理想成形和实验效果等问题。
Description
技术领域
本发明属于增材制造技术领域，具体涉及一种电子束选区熔化成形用Ti合金粉末。
背景技术
Ti合金电子束选区熔化微观组织研究表明，凝固形成粗大柱状原始β晶粒形貌，主要原因在于高能电子束使Ti合金过热度大，溶质元素Al、V不易形成成分过冷，非均质形核数量少，同时成形过程较高的温度梯度，利于柱状晶粒的外延生长，在层层堆积过程中，不利于<001>取向的原始β晶粒的生长被抑制。综上可知，能够通过添加晶粒生长限制因子较高的元素或提供更多的非均质形核质点，使初始凝固组织形貌等轴晶化,有助于改善电子束选区熔化组织不均匀性和力学性能各向异性，提高增材制造构件可靠性。
添加晶粒生长限制因子较高的元素进行微合金化由于需要对制粉的铸锭进行合金化处理，周期长，成本高昂。因此本发明基于节约成本、提高效益的理念，将纳米陶瓷颗粒作为非均匀形核质点，使电子束选区熔化成形钛合金的粗大柱状晶转变为细小均匀的等轴晶粒，并作为弥散强化质点强化合金，同步提升钛合金比强度、承温能力、耐腐蚀、耐磨等力学性能，在航空航天、汽车、船舶、军工、医疗等领域具有广阔的应用潜力，是增材制造乃至材料科学与工程应用的热点研究方向。
对比Ti合金的纳米颗粒增强复合材料的粉末混合技术——静电自组装，是采用电解质溶液浸没粉末后烘干带上电解质，再将纳米粒子悬浮溶液浸没粉末后烘干，利用粉末表面带有的电解质吸附纳米颗粒。很明显，这种技术容易导致粉末被溶液和电解质污染，致使杂质元素残留，并且由于静电结合的粉末在电子束的作用下易被斥力作用吹散，达不到理想效果。因此需要一种污染少、结合强度较高、操作简便的混合纳米颗粒与Ti合金粉末的技术方法。
发明内容
本发明目的是提供一种电子束选区熔化成形用纳米颗粒增强Ti基复合材料粉末。
实现本发明目的的技术解决方案是：一种电子束选区熔化成形用纳米颗粒增强Ti基复合材料粉末，该纳米陶瓷颗粒增强Ti基复合材料粉末经机械活化处理。
较佳的，纳米陶瓷颗粒增强Ti基复合材料粉末由纳米陶瓷颗粒与Ti合金粉末按照一定质量比混合而成。
具体的，纳米陶瓷颗粒包括TiB2、TiC、Y2O3、ZrH2中任意一种或几种。
较佳的，所述的机械活化处理是指：将纳米陶瓷颗粒增强Ti基复合材料粉末置于球磨机中球磨处理。
较佳的，所述的机械活化处理是指：真空条件下，将纳米陶瓷颗粒增强Ti基复合材料粉末置于球磨机中球磨处理。
本发明与现有技术相比，由于不使用溶液和电解质，避免了致使杂质元素残留，纳米粒子在球磨过程中与Ti合金粉末结合强度大大提高，有助于防止纳米粒子在电子束作用下电荷积聚、被斥力吹散，达不到理想成形和实验效果等问题。因此本发明是一种真空污染少、结合强度较高、操作简便的混合纳米颗粒与Ti合金粉末的技术方法。
具体实施方式
下面结合实施方式对本发明进行详细说明。
本发明提供了一种电子束选区熔化成形方法，包括以下步骤：
步骤1：首先清理立式行星球磨机，酸液清洗立式真空不锈钢罐去除表面污渍，使用去离子水冲洗并用无水乙醇擦拭烘干，无水乙醇并烘干清洗氧化锆球。
步骤2：按照一定掺杂比例将纳米陶瓷颗粒与Ti合金粉末混合，将所得混合粉末按一定球料比与烘干的氧化锆球混合，至多填满真空不锈钢罐容积的2/3，将罐内真空度抽至10-3Pa。
步骤3：设置球磨机转速和球磨时间，确保纳米陶瓷颗粒均匀漫散分布于Ti合金粉末表面，保证Ti合金粉末粒径分布不改变，两种粉末具有一定的结合强度。
步骤4：将经机械活化的纳米陶瓷颗粒增强Ti基复合材料粉末加入电子束选区熔化设备成形真空舱室粉斗内，完成加工前准备工作，将待加工构件三维模型数据输入设备。
步骤5：开启电子束选区熔化设备进行预热、熔化加工；
步骤6：并使用回收系统回收粉末，取出成形构件，加工完成。
Claims (5)
1.一种电子束选区熔化成形用纳米颗粒增强Ti基复合材料粉末，其特征在于，该粉末经机械活化处理。
2.如权利要求1所述的粉末，其特征在于，纳米陶瓷颗粒增强Ti基复合材料粉末由纳米陶瓷颗粒与Ti合金粉末按照一定质量比混合而成。
3.如权利要求1所述的粉末，其特征在于，纳米陶瓷颗粒包括TiB2、TiC、Y2O3、ZrH2中任意一种或几种。
4.如权利要求1所述的粉末，其特征在于，所述的机械活化处理是指：将纳米陶瓷颗粒增强Ti基复合材料粉末置于球磨机中球磨处理。
5.如权利要求1所述的粉末，其特征在于，所述的机械活化处理是指：真空条件下，将纳米陶瓷颗粒增强Ti基复合材料粉末置于球磨机中球磨处理。
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Citations (5)
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| CN111940723A (zh) * | 2020-08-30 | 2020-11-17 | 中南大学 | 一种用于3d打印的纳米陶瓷金属复合粉末及应用 |
| CN112251646A (zh) * | 2020-10-21 | 2021-01-22 | 吉林大学 | 内生纳米复合陶瓷颗粒的钛合金粉体及其制备方法和应用 |
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- 2021-04-29 CN CN202110476509.3A patent/CN113199023A/zh active Pending
Patent Citations (5)
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| CN107904439A (zh) * | 2017-11-16 | 2018-04-13 | 淮阴工学院 | 一种原位纳米多相复合强韧化钛基复合材料及其制备方法 |
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| CN111235417A (zh) * | 2020-01-15 | 2020-06-05 | 华南理工大学 | 一种基于激光选区熔化成形的高性能铝基复合材料及其制备方法 |
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| CN112251646A (zh) * | 2020-10-21 | 2021-01-22 | 吉林大学 | 内生纳米复合陶瓷颗粒的钛合金粉体及其制备方法和应用 |
Non-Patent Citations (1)
| Title |
|---|
| 阚文斌: "电子束选区熔化技术制备高Nb-TiAl合金的成形工艺和组织调控研究", 中国优秀博硕士学位论文全文数据库(博士)工程科技Ⅰ辑, no. 06, pages 137 * |
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