金刚石/铜基粉末注射成形熔体温度对充填率影响的有限元模拟
Finite Element Simulation of Melt Temperature Effect on Filling Rate in Diamond/Copper-Based Powders Injection Molding
摘 要
对金刚石/铜基粉末注射成形熔体流变性能进行了非线性回归, 得到了Cross-WLF模型参数; 利用Moldflow有限元软件模拟了注射成形时熔体温度对充填率的影响, 并进行了试验验证。结果表明: 随着熔体温度的升高, 充填率逐渐增大, 但增大速率却逐渐下降; 当注射压力为10 MPa, 注射流量为10 cm3·s-1, 熔体温度为170 ℃时, 填充率就达到了100%, 试验结果和模拟结果相吻合; 此条件下注射成形制备的试样无宏观裂纹及其它缺陷, 内部组织均匀, 注射效果较好。
有限元模拟
熔体温度
填充率
powder injection molding
finite element simulation
melt temperature
filling rate
Abstract
The nonlinear regression analysis was done for the rheological property of melt in diamond/copper-based powders injection molding to obtain the Cross-WLF model parameters. The influence of melt temperature on filling rate was simulated using Moldflow, a finite element simulation software, and was verified by experiment. The results show that the filling rate increased with temperature increasing, but the increasing rate gradually declined. The filling rate reached 100% when injection pressure was 12 MPa, injection flow rate was 10 cm3·s-1 and injection temperature was 170 ℃. The simulated results fitted well with experimental results. And the molded specimen had no obvious cracks with uniform microstructure, giving the best injection effect under the above conditions.
中图分类号 TB333
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(50775069); 湖南省自然科学基金青年人才联合培养项目(12JJB006)
收稿日期 2013/7/17
修改稿日期 2014/7/19
网络出版日期
作者单位点击查看
备注邓朝晖(1968-), 男, 湖南衡山人, 教授, 博士。
引用该论文: DENG Zhao-hui,WU Qiao-ping,YAN Jia-ying,WAN Lin-lin. Finite Element Simulation of Melt Temperature Effect on Filling Rate in Diamond/Copper-Based Powders Injection Molding[J]. Materials for mechancial engineering, 2014, 38(10): 93～96
邓朝晖,伍俏平,言佳颖,万林林. 金刚石/铜基粉末注射成形熔体温度对充填率影响的有限元模拟[J]. 机械工程材料, 2014, 38(10): 93～96
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【8】QU Xuan-hui, GAO Jian-xiang, QIN Ming-li, et al. Application of a wax-based binder in PIM of WC-TiC-Co cemented carbides[J]. International Journal of Refractory Metals & Hard Materials, 2005, 23: 273-277.
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