煤矸石/PES复合材料选区激光烧结工艺参数数值模拟  

Numerical simulation of process parameters for selective laser sintering of coal gangue/PES composite mat

作　　者：曲芳 翟秦 袁凯 王平山 苏丹 QU Fang;ZHAI Qin;YUAN Kai;WANG Pingshan;SU Dan(School of Mechanical Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学机械工程学院,哈尔滨150022

出　　处：《粉末冶金材料科学与工程》2024年第1期1-10,共10页Materials Science and Engineering of Powder Metallurgy

基　　金：黑龙江省教育厅基本科研业务费项目(2022-KYYWF-0537,2022-KYYWF-0562);黑龙江省博士后科研启动基金项目(2023BSH07);国家自然科学基金面上项目(52074111);黑龙江省自然科学基金项目(JJ2020YX0400)。

摘　　要：基于高斯热源模型、热传导模型及Flow-3D软件,建立煤矸石、聚醚砜(polyethersulfone,PES)粉末颗粒模型及煤矸石/PES(coal gangue/PES,CPES)复合材料粉末床三维模型,对CPES复合材料选区激光烧结过程进行温度场数值模拟。研究激光功率、扫描速度和扫描间距对单道和双道烧结层成形的影响规律,对烧结工艺参数的取值进行预测,并通过实验进行验证。结果表明:当激光功率为15 W时,熔池平均温度为596 K,烧结件冲击强度为179.4 MPa,熔道较平直,球化现象消失,与粉末结合良好,形成高质量的熔道;当扫描速度为1800 mm/s时,熔池平均深度为99μm、平均宽度为200μm,烧结件冲击强度为173.5 MPa,熔化区域近乎圆形,熔池长度最短,熔道热量累积明显,未发现偏转现象;当扫描间距为100μm时,熔道搭接率为60.8%,烧结件冲击强度为176.2 MPa,两条熔道之间的搭接区域表面过渡光滑且连续,无孔洞和球化现象发生。仿真结果与实验结果一致,可为复合材料烧结件烧结质量的稳定性提供保障。Based on the Gaussian heat source model,thermal conductivity model,and Flow-3D software,a powder particle model of coal gangue and polyethersulfone(PES)powder,as well as a three-dimensional model of coal gangue/PES(CPES)composite material powder bed,were established to numerically simulate the temperature field during the selected laser sintering process of CPES composites.The influences of laser power,scanning speed,and scanning space on the formation of single and double pass sintered layers were studed,the values of sintering process parameters was predicted and verified through experiments.The results show that when the laser power is 15 W,the average temperature of the melten pool is 596 K,the impact strength of the sintered part is 179.4 MPa,the melt path is relatively straight,the spheroidization phenomenon disappears,and the bonding with the powder is good,forming a high-quality melt path;When the scanning speed is 1800 mm/s,the average depth of the molten pool is 99 um,the average width is 200μm,and the impact strength of the sintered part is 173.5 MPa,the melting area is almost circular,the length of the melten pool is the shortest,the heat accumulation in the melt path is significant,and no deflection phenomenon is found;When the scanning space is 100μm,the overlap rate of the melt path is 60.8%,and the impact strength of the sintered part is 176.2 MPa,the surface transition of the overlap area between two melt paths is smooth and continuous,without any holes or spheroidization phenomenon.The simulation results are consistent with the experimental results,which can provide assurance for the stability of the sintering quality of composite material sintered parts.

关 键 词：Flow-3D 选区激光烧结 煤矸石利用 烧结工艺 复合材料 

分 类 号：TQ327[化学工程—合成树脂塑料工业]