铝合金连杆的液态模锻成形工艺  

Liquid forging process of aluminum alloy connecting rod

作　　者：唐全波[1,2] 杜力[1,2] 

机构地区：[1]重庆工商大学制造装备机构设计与控制重庆重点实验室,重庆400067 [2]重庆工商大学机械工程学院,重庆400067

出　　处：《兵器材料科学与工程》2015年第3期12-15,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金项目资助(51075417);总装"十二五"预研项目资助(51318040207);重庆高校创新团队计划资助(KJTD201313);重庆市科技攻关计划项目资助(CSTC 2009AC3062)

摘　　要：根据液态模锻成形工艺原理,设计铝合金连杆的液态模锻成形模具结构,并进行液态模锻成形工艺试验。对工艺试验中获得的连杆制件进行T6热处理,经宏观缺陷检查及金相观察发现,制件无缩孔缩松、无冷隔、浇不足、热处理鼓泡等铸造缺陷,组织致密并具有塑性变形特征。借助液态模锻成形工艺具备液态压力充型、压力下结晶凝固、压力补缩和固态塑性变形的特点,获得连杆制件的力学性能,平均达到σb=358 MPa、δ=5.1%,较压铸连杆分别提高47.3%和64.5%。A mould used for Al alloy connecting rod forming was designed according to the principle of liquid forging,and process test was carried out. The Al alloy connecting rods made by liquid forging process and heat treated by T6 mode do not show any casting defects such as shrinkage cavity,porosity,cold shut,misrun,bubbling by visual inspection and metallographic observation,and exhibits features of compact structure and plastic deformation. Due to the advantages of filling,crystallizing,solidifying,feeding under pressure and plastic deforming during whole liquid forging process,the average tensile strength and average elongation of Al alloy connecting rods made by the process reach 358 MPa and 5.1%,increasing by 47.3% and 64.5%compared to those of die-casting ones,respectively.

关 键 词：液态模锻 挤压铸造 ADC12铝合金 连杆 

分 类 号：TG249.2[金属学及工艺—铸造] TG376.2