基于数值模拟的飞机超高强度钢前起外筒模锻件制造  

Manufacture of die forgings for aircraft ultra-high strength steel front-lifting outer cylinder based on numerical simulation

作　　者：李蓬川 张睿 Li Pengchuan;Zhang Rui(China National Erzhong Group Deyang Wanhang Die Forging Co.,Ltd.,Deyang 618013,China)

机构地区：[1]中国第二重型机械集团德阳万航模锻有限责任公司,四川德阳618013

出　　处：《锻压技术》2021年第9期277-283,共7页Forging & Stamping Technology

基　　金：航空核电及石化等领域超大构建高效低成本增材制造技术的应用示范(2018YFB1106500)。

摘　　要：通过物理边界测定试验,确定了300M钢材料的热辐射系数、与模具的热交换系数和摩擦因数;在同一规格棒材上切取试样,完成了热模拟压缩试验,获得了300M超高强度钢的应力-应变曲线;将物理边界参数和应力-应变曲线导入到有限元模拟软件中,建立了与实际生产工况高度吻合的数值模拟仿真空间。通过全流程的数值模拟技术对坯料成形过程和模锻成形过程进行不断地迭代优化,精准预测了前起外筒模锻件的成形过程,锻件料工比控制在1.2以内,控制了材料消耗,制定出3火次制坯和2火次模锻的短流程工艺方案。锻件一次试制成功,实现了飞机前起外筒模锻件的短流程的稳定制造,获得了外形尺寸合格、组织性能优良的高品质产品。Thermal radiation coefficient,heat exchange coefficient and friction coefficient with dies of 300 M steel were determined by physical boundary measurement test.The stress-strain curve of 300 M ultra-high strength steel was obtained by completion of thermal simulation compression test with cutting samples from billets of the same specification.The physical boundary parameters and stress-strain curve were imported into the finite element simulation software to establish a numerical simulation space highly consistent with the actual production conditions.With the numerical simulation technology on the whole process,the blank forming process and die forging process were continuously iteratively optimized.The forming process of front-lifting outer cylinder die forgings was accurately predicted and the material work ratio of forgings was controlled within 1.2.The material consumption was controlled and the short process schemes of 3-heatings blank-making and 2-heatings die forging was complied.The trial production of forgings was manufactured successfully.The stable manufacturing of the short process for die forgings of aircraft front-lifting outer cylinder was achieved,and the high-quality products with qualified overall dimensions and excellent microstructure and performance were received.

关 键 词：300M超高强度钢 飞机起落架 模锻成形 

分 类 号：TG316.3[金属学及工艺—金属压力加工]