压力对挤压铸造铝合金件性能的影响  

lnfluence of Pressure on Properties of Aluminum Alloy Castings in Squeeze Casting

作　　者：吕野楠[1] 丁韧[1] 

机构地区：[1]辽宁省交通高等专科学校机电系,辽宁沈阳110122

出　　处：《铸造技术》2017年第2期466-468,共3页Foundry Technology

摘　　要：研究了挤压铸造压力对壁厚不均铸件性能的影响。通过对该铸件不同部位宏观、微观组织、密度以及力学性能的研究表明,合金的力学性能随着压力的增加而增大,并且在100 MPa时达到最大值,之后继续增加压力,对材料性能影响不大,铸件厚壁位置的最大剪切强度达到174.31 MPa、硬度达到97.7 HB。压力损失对铸件性能有很大的影响,厚壁位置由于压力损失引起的性能降低较为明显。The influence of pressure on microstructure, density and mechanical properties of aluminum alley castings was investigated in squeeze casting. The results show that the mechanical properties of the alloy increase with the increase of pressure, and the optimal synthesis mechanical properties can be obtained at the suitable squeeze pressure of 100 MPa,there is little effect on the performance of the material continuing to increase pressure. It possesses a shear strength of174.31 MPa and a hardness of 97.7 HB in thick wall position of the casting. The pressure loss has more obvious effect on the casting performance in the thick wall position.

关 键 词：挤压铸造 压力 性能 铝合金 

分 类 号：TG249.2[金属学及工艺—铸造]