ZL114A异形结构导弹壳体凝固成形工艺设计  

Solidification Forming Design for ZL114A Heteromorphic Missile Shell

作　　者：樊振中 丛延 吴凌华 李卫东 苗健 刘国 张勇为 彭石磊 肖佑涛 杨欢 Fan Zhenzhong;Cong Yan;Wu Linghua;Li Weidong;Miao Jian;Liu Guo;Zhang Yongwei;Peng Shilei;XiaoYoutao;Yang Huan(Beijing Institute of Aeronautical Materials,Beijing 100095;Beijing Advanced Engineering Technology and Application Research Center of Aluminum Materials,Beijing 100095;Beijing Aerospace Systems Engineering Research Institute,Beijing 100076;The Fourth Military Representative Office of Xi'an Bureau of Seafarers in Chengdu Area,Chengdu 610100;Sichuan Aerospace Changzheng Equipment Manufacturing Co.,Ltd.,Chengdu 610100;Sichuan Sachuan Aviation Technology Co.,Ltd.,Chengdu 610000)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]北京市先进铝合金材料及应用工程技术研究中心,北京100095 [3]北京宇航系统工程研究所,北京100076 [4]海装西安局驻成都地区第四军事代表室,成都610100 [5]四川航天长征装备制造有限公司,成都610100 [6]四川仨川航空科技股份有限公司,成都610000

出　　处：《特种铸造及有色合金》2024年第1期1-8,共8页Special Casting & Nonferrous Alloys

摘　　要：采用低压铸造工艺在715℃浇注了ZL114A异形结构导弹壳体,充型和凝固时长分别为4.79 s与1615 s,实现了自上而下的平稳充型,形成了自上而下与自内向外的凝固顺序。结果表明,铸态组织主要由α-Al基体、α-Al+Si共晶体、Mg_(2)Si相与Al_(3)Ti相等组成,导弹壳体顶端、中部和底部区域平均晶粒直径分别为116.09、147.76与178.33μm;试样抗拉强度、屈服强度、伸长率与弹性模量均值分别为344.66 MPa、275 MPa、8.44%和71.5 GPa,离散系数分别为0.55%、0.93%、3.5%与0.7%。沿导弹壳体高度方向自上而下本体试样力学性能连续下降,顶端区域抗拉强度、屈服强度、伸长率与弹性模量分别为364 MPa、284 MPa、9.2%与71.5 GPa;时效热处理保温后铸态板条状、块状Si相形貌转变为近球状,断口表面残留大量微观韧窝,断裂机制为典型的韧窝断裂。ZL114A heteromorphic missile shell was manufactured at 715 ℃ by low-pressure filling with filling and solidification time of 4. 79 s and 1 615 s, achieving a smooth top-down filling with a top-down and inside-outside solidification sequence. The results indicate that as-cast structure is mostly composed of α-Al matrix, α-Al+Si eutectic, Mg_(2)Si phase, and Al_(3)Ti phase, and average grain size of shell in the top, middle, and bottom regions are 116. 09, 147. 76, and 178. 33 μm, respectively. The mean values of tensile strength, yield strength, elongation and elasticity modulus are 344. 66 MPa, 275 MPa, 8. 44%, and 71. 5 GPa, and dispersion coefficients are 0. 55%, 0. 93%, 3. 5%and 0. 7%, respectively. The mechanical properties are declined progressively from top to bottom along the height of the missile shell, and tensile strength, yield strength, elongation, and elasticity modulus in top region are 364 MPa, 284 MPa, 9. 2%, and 71. 5 GPa, respectively. The morphology of as-cast Si phase is transformed from slatted and blocky shape to a roughly spherical shape after aging heat treatment, with large amounts of residual dimples on the fracture surface, and fracture mechanism is characterized by dimple fracture.

关 键 词：ZL114A 导弹壳体 异形结构 力学性能 凝固成形 

分 类 号：TG244.3[金属学及工艺—铸造] TP311[自动化与计算机技术—计算机软件与理论]