钛合金铸造用支撑座砂芯改性工艺研究

Research on Modification Process of Sand Core of Support Base for Titanium Alloy Casting

简要分析了某支撑座型芯常规材质制备的局限性,提出了一种基于3D打印砂芯的钛合金铸造用砂芯改性工艺。通过两次无机粘结剂的浸渗、焙烧处理,使砂芯在具备一定强度的同时维持高的尺寸精度,并且具有十分优异的脱芯能力。在实际生产验证中,铸件表面质量高,荧光检测无明显线性缺陷,铸件表面污染层厚度小于20μm。

By analyzing the limitations of support base core prepared with conventional materials in production,a new modification process of 3D printed sand core applying to titanium alloy casting was proposed.With infiltrated and roasted twice,the sand core had a good combination of the strength and dimension accuracy,as well as the excellent removal ability.The production practice has proved that the castings exhibited a good surface quality with a thin contamination layer(<20μm)and no obvious linear defect.