ZTC4钛合金支板熔模铸造工艺研究

Research on Investment Casting Process of ZTC4 Titanium Alloy Supporting Plate

采用陶瓷型芯与熔模精密铸造相结合的方法制备了具有狭小型腔的高品质ZTC4钛合金支板铸件。测试了不同材质陶瓷型芯对铸件型腔表面脆性a层厚度的影响。开展了包括机械法、碱洗法、水力清洗法等陶瓷型芯去除工艺的应用研究。结果表明,氧化锆陶瓷型芯强度高、惰性好,铸件表面产生的脆性a层相对较薄,可作为成型钛合金铸件狭小型腔部位的主要材质。机械法及碱洗法不能有效去除支板铸件狭小型腔中的氧化锆陶瓷型芯,水力清洗法能够有效去除狭小型腔内的陶瓷型芯,综合效果较为理想。

High quality support plate casting of ZTC4 titanium alloy with narrow cavity was prepared by the method of ceramic core and investment mold precision casting.The influence of ceramic cores of different materials on the thickness of layer on the surface of the casting cavity was tested.The application research of ceramic core removal process including mechanical method,alkaline cleaning method and hydraulic cleaning method was carried out.The results show that the zirconia ceramic core has high strength and good inertness,and the brittle layer on the surface of the casting is relatively thin,which can be used as the main material of the narrow cavity of the titanium alloy casting.The mechanical method and alkaline washing method cannot effectively remove the zirconia ceramic core in the narrow cavity of the casting,but the hydraulic cleaning method can effectively remove the ceramic core in the narrow cavity,and the comprehensive effect is relatively ideal.