金刚石／铜基钎料粉末注射成型工艺参数的优化

摘要

通过正交试验对金刚石／铜基钎料粉末小型薄壁件的注射成型工艺参数进行了优化。结果表明：当模具温度为40℃，注射压力为12MPa，注射温度为150℃，注射流量为20cm^3·S^-1，为最佳工艺参数组合，能获得表面光整、组织均匀的注射生坯；随着注射压力的增大，注射生坯密度增大；注射温度升高，生坯密度降低；注射流量增大，生坯密度先升后降。%Optimization of parameters in the injection molding process of diamonds/copper based brazing niter metal powders was investigated by orthogonal experiments. Results indicate that the optimized combination of parameters was given as following: the mould temperature was 40 ℃; injection pressure was 12 MPa; injection temperature was 150 ℃ and injection flow rate was 20 cm^3 . s 1. And a molded specimen with a smooth surface, uniform microstructure could be achieved under the optimized condition. The density of molded specimens increased with increase of injection pressure, but decreased with increase of injection temperature, and the density increased first and decreased afterwards when the iniection flow rate increased.