摘要
以ZM6镁合金厚大柱状铸件为研究对象,围绕铸件结构特点和技术质量要求,研究铸件的研制工艺。针对凝固顺序控制,将差压铸造与重力铸造技术相结合,开展数值模拟优化比选,在立筒中间位置包围厚度为20 mm的冷铁,增大铸件自下而上的温度梯度,缩短铸件凝固结晶时间;针对阻燃设计,将涂料中滑石粉、硫磺、硼酸的质量比由8:1:1调整为6:2:2,以及引入近液相线浇注,实现有效阻燃。研制结果:ZM6镁合金厚大柱状铸件的力学性能、内部质量均满足HB7780-2005中Ⅱ类铸件要求技术指标。
Based on the structural characteristics and technological quality requirements of ZM6 magnesium alloy thick and large cylindrical casting,the development process of casting is studied.Aiming at solidification sequence control,technologies such as differential pressure casting and gravity casting are combined to carry out numerical simulation optimization and comparison,and the cold iron with thickness of 20 mm is surrounded in the middle of the vertical cylinder to increase the temperature gradient of the casting from bottom to top and shorten the solidification crystallization time of the casting.According to the flame retardant design,the mass ratio of talc powder,sulfur and boric acid in the coating is adjusted from 8:1:1 to 6:2:2,and the near liquidus pouring is introduced to realize effective flame retardant.Research result:the ZM6 magnesium alloy thick and large cylindrical casting with mechanical properties and internal quality meets the technological requirement index of ClassⅡcasting in HB 7780-2005.
作者
李翔光
刘怡乐
陈寅
邱辉
邵军
LI Xiang-guang;LIU Yi-le;CHEN Yin;QIU Hui;SHAO Jun(Guizhou Aerospace Fenghua Precision Equipment Co.,Ltd.,Guiyang 550000,China)
出处
《工业技术创新》
2021年第3期33-36,共4页
Industrial Technology Innovation
关键词
镁合金
厚大柱状铸件
阻燃
数值模拟
差压铸造
重力铸造
Magnesium Alloy
Thick and Large Cylindrical Casting
Flame Retardant
Numerical Simulation
Differential Pressure Casting
Gravity Casting
