基于正交实验制备TiCp/GH3536复合材料的组织与性能  

Microstructure and properties of TiCp/GH3536 composites prepared by orthogonal test

作　　者：宋美慧[1] 刘佳伟 杨慧敏 张煜[1] 李岩[1] Song Meihui;Liu Jiawei;Yang Huimin;Zhang Yu;Li Yan(Institute of Advanced Technology,Heilongjiang Academy of Sciences,Harbin 150009,China;Department of Material&Chemical Engineering,Heilongjiang Institute of Technology,Harbin 150050,China)

机构地区：[1]黑龙江省科学院高技术研究院,哈尔滨150009 [2]黑龙江工程学院材料与化学工程学院,哈尔滨150050

出　　处：《黑龙江科技大学学报》2023年第3期346-354,共9页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省科学院双提雁阵特别计划项目(STYZ2021GJS01);黑龙江省科学院青年创新基金项目(CXJQ2021GJS01)。

摘　　要：针对GH3536合金选区激光熔化成型中的微裂纹缺陷,采用纳米TiC颗粒增强GH3536合金,获得无微裂纹的TiCp/GH3536复合材料,基于正交设计确定制备复合粉末的最佳球磨工艺,并分析其组织性能。结果表明:在转速、球料比和球磨时间三因素中,转速是影响复合粉末性能指标的主要因素;最佳球磨工艺为球磨机转速200 r/min,球料比5∶1,球磨时间5 h。该工艺制备的复合粉末为球形,球形度96.5%,平均粒度29.58μm,流动性0.372 s/g,松装密度4.22 g/cm 3;TiCp/GH3536复合材料组织致密没有微裂纹,屈服强度为867 MPa,拉伸强度为1072 MPa,与GH3536合金相比,分别提高了50.8%和40.1%,同时,具有更低的热扩散率和瞬时热膨胀系数。This paper attempts to address the problem ofthe microcrack flawsin the selective laser melting of GH3536 alloy.The study involves using nano-TiC particles to reinforce GH3536 alloy and prepare TiCp/GH3536 composites free of microcracks;determining the optimal ball milling process for preparing composite powders;and analyzing the microstructure properties.The findings indicate that ball milling speed is the primary factorimpacting the performance index of composite powder among the three components of ball milling speed,ball material ratio,and ball milling time;and the optimal ball milling process for preparing composite powders is 200 r/min for ball mill speed,5∶1 for ball-to-material ratio,and 5 h for ball milling time.The spherical composite powders prepared with this process shows degree of sphericity by 96.5%,average particle size by 29.58μm,flowability by 0.372 s/g,and bulk density by 4.22 g/cm 3;TiCp/GH3536 composites without microcrack show yield strengths by 867 MPa,tensile strength by 1072 MPa,as which are improved by 50.8%and 40.1%respectively compared with GH3536 alloys,and the composites exhibit a lower thermal diffusivity and instantaneous thermal expansion coefficient.

关 键 词：正交实验设计 纳米TiC颗粒 GH3536 机械合金化 选区激光熔化 

分 类 号：TF124[冶金工程—粉末冶金] TG115[冶金工程—冶金物理化学]