摘要
以某ZL114A异型薄壁支架铸件为研究对象,开展铸造工艺研究。提出保障ZL114A合金铸件内部质量需遵循的原则,并据此提出涵盖浇注系统设计、冷铁布局、仿真模拟、砂型3D打印、金属熔炼和浇注参数设计的铸造工艺流程。利用Novacast软件对铸件充型和浇注过程进行仿真模拟,表明末端冷铁的设计与摆放有利于铸件实现顺序凝固原则,可以有效减少疏松缺陷的产生。同时,通过控制熔炼过程的合金成分、增加晶粒细化剂以及氩气精炼等手段,可有效提高合金液的品质。确定了差压浇注过程的工艺参数,并通过X射线无损检测验证得知铸件满足航空行业标准《铝合金铸件规范》(HB 963—2005)中的Ⅰ类铸件标准,达到了成品内部质量要求。
Taking a ZL114A special-shaped thin-wall bracket casting as the research object,the casting process research was carried out.The principles to be followed to ensure the internal quality of ZL114A alloy castings were put forward,and the casting process flow covering gating system design,cold iron layout,simulation,sand mold 3D printing,metal melting and gating parameter design was put forward.Novacast software was used to simulate the filling and pouring process of castings,showing that the design and placement of the end chills are beneficial to realize the principle of sequential solidification of castings and can effectively reduce the occurrence of loose defects.Meanwhile,the quality of alloy liquid can be effectively improved by controlling the alloy composition in the smelting process,increasing grain refiners and refining with argon gas.The technological parameters of the differential pressure casting process were determined,and it is proved by X-ray nondestructive testing that the castings meet the Class I casting standard in the aviation industry standard Specification for Aluminum Alloy Castings(HB 963—2005)and meet the internal quality requirements of finished products.
作者
张培霖
李翔光
倪明
ZHANG Peilin;LI Xiangguang;NI Ming(Guizhou Aerospace Fenghua Precision Equipment Co.,Ltd.,Guiyang 550000,China)
出处
《工业技术创新》
2022年第2期31-37,共7页
Industrial Technology Innovation
