SLS成型技术在钛合金熔模铸造中的应用

采用SLS激光烧结模型与熔模精密铸造相结合的方法成型了单件或小批量钛合金叶轮。对激光烧结的叶轮模型的制备、型壳制备、脱蜡、熔炼浇注等方面进行了研究。结果表明,采用激光烧结的模型制备时间短、成本低;浇注出的铸件表面无裂纹、冷隔、化学粘砂等缺陷,内部无裂纹、夹渣缺陷。铸件的化学成分达到标准要求。在试制阶段,该工艺与传统的工艺相比,SLS激光烧结的熔模制备时间短,生产成本低。

Application of SLS Forming Technology in Investment Casting of Titanium Alloy

Single or small batch titanium alloy impeller was formed by SLS laser sintering model and investment mold precision casting.The preparation of impeller model,mold shell preparation,dewaxing,melting and pouring were studied.The results show that the model of laser sintering has a short time and low cost.There are no cracks,cold insulation,chemical sand and other defects on the surface of castings,and no cracks and slag defects inside.The chemical composition of the casting is up to standard.In the trial production stage,compared with the traditional process,SLS laser sintering has a shorter investment mold preparation time and a lower production cost.