哈尔滨工程大学学报2011，Vol.32Issue(7)：965-968,4.DOI:10.3969/j.issn.1007-7043.2011.07.023
红外激光烧结瞬态温度场的模拟和测量
Simulation and testing of the transient temperature field of infrared laser sintering
摘要
Abstract
In the process of rapid laser prototyping, the transient sintering temperature affects molding quality directly. In considering the variation of thermal properties and transformation between solid and liquid states of powder , using the finite element method, a 3-D numerical simulation was conducted by using the analysis system ( AN-SYS) software for the transient sintering temprature of CO2 infrared laser beams and A12O3 coated ceramic powders. The 3-D temperature field was reconstructed according to the measured result of high-speed charge coupled device (CCD). Numerical simulation agreed well with experimental results. The result demonstrates that the sintering temperature of A12O3 coated with ceramic powders is far less than the A12O3 melting point temperature (1 500℃). When the beam passes by the observation points several times after several returns, the second peak of temperature occurs which is beneficial to molding quality. This is consistent with a practical sintering mechanism.关键词
激光烧结/瞬态烧结温度/有限元法/CCD测温Key words
laser sintering/transient sintering temperature/finite element method/CCD temperature testing分类
电子信息工程引用本文复制引用
邢键,孙晓刚,周琛,黄宗军,孙晶华..红外激光烧结瞬态温度场的模拟和测量[J].哈尔滨工程大学学报,2011,32(7):965-968,4.基金项目
教育部博士点基金资助项目(20070217011). （20070217011）
