EIGA法制备激光3D打印用TC4合金粉末

发布时间：2018-02-11 11:50

本文关键词： 气雾化激光D打印 TC合金粉末粉末形貌松装密度空心球率　出处：《东北大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：采用电极感应熔炼气雾化法(EIGA)制备激光3D打印用TC4合金粉末,研究了雾化气压对粉末收得率、粒径、粉末形貌、松装密度、流动性及空心球率等特征的影响.结果表明:随着雾化气压的增加,粉末收得率、球形度增加,而粉末平均粒径减小.雾化气压为6.0MPa时,粉末收得率超过50%,平均粒径小于100μm,松装密度为2.950 g/cm~3,流动性为2.242 g/s,空心球率低于3%.雾化气压为7.0 MPa时,非球形缺陷粉末和空心球率增加.对比雾化气压为6.0 MPa制备的不同粒径粉末,以及激光3D打印后的拉伸曲线与断口形貌,发现50~100μm粉末打印TC4合金的抗拉强度达907.7 MPa,延伸率最大达15.3%,具有良好的强韧性.
[Abstract]:TC4 alloy powder for laser 3D printing was prepared by electrode induction melting method (EIGA). The effect of atomization pressure on the recovery rate, particle size, powder morphology and bulk density of the powder was studied. The results show that with the increase of atomization pressure, the recovery rate and sphericity of the powder increase, while the average particle size of the powder decreases, and the atomization pressure is 6.0 MPA. The average particle size is less than 100 渭 m, the loose density is 2.950 g / cm ~ (-1), the fluidity is 2.242 g / s, the hollow sphere rate is lower than 3. When the atomization pressure is 7.0 MPa, The ratio of non-spherical defect powder and hollow sphere was increased. Compared with the different particle size powder prepared by atomizing pressure of 6. 0 MPa, the tensile curve and fracture surface morphology of laser 3D printing were also obtained. It is found that the tensile strength of 50 渭 m 100 渭 m powder printed TC4 alloy is 907.7 MPa, and the maximum elongation is 15.3m.The alloy has good strength and toughness.
【作者单位】：东北大学材料各向异性与织构教育部重点实验室;
【基金】：辽宁省科技计划项目(2014221006) 国家重点研发计划项目(2016YFB1100201) 中央高校基本科研业务费重大创新项目(N130810002) 广东省科技计划项目(2015B010122001)
【分类号】：TG146.23;TG665

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