摘要
为了研究蛇形通道制备半固态浆料并经过均热后的流变压铸性能,以A356铝合金为材料进行实验研究.结果表明:当浇注温度为680℃、均热功率为1.6~2.5 kW时,半固态浆料的微观组织可以达到均一,而且初生α(Al)的形貌更加圆整;该浆料经过流变压铸成形后,在铸态下拉伸试样的抗拉强度可达245~260 MPa,伸长率可达8.5%~13%;经过T6热处理后,拉伸试样的抗拉强度可达295~320 MPa,伸长率可达7%~11%.均热可以对浆料的整个温度进行调整来满足不同铸件的流变压铸.
To study rheo-diecasting performance of the semi-solid slurry prepared by serpentine channel pouring and after soaked,the A356 aluminum alloy was used.The results show that,under the conditions of pouring temperature of 680 ℃ and soaking power of 1.6~2.5 kW,uniform microstructure can be achieved,and primary α(Al) morphology become rounder.After rheo-diecasting,ultimate tensile strength of the tensile test samples can reach 245~260 MPa,elongation can reach 8.5%~13%.After T6 heat treatment,the ultimate tensile strength can be enhanced to 295~320 MPa,and the elongation to 7%~11%.The temperature of the whole soaked slurry can be adjusted to meet different castings for rheo-diecasting.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2012年第2期70-74,共5页
Materials Science and Technology
基金
国家高新技术研究发展计划资助项目(2006AA03Z115)
国家基础研究发展计划资助项目(2011CB6056302-1)
国家自然科学基金资助项目(50774007)
关键词
半固态
A356铝合金
蛇形通道
力学性能
微观组织
semi-solid
A356 aluminum alloy
serpentine channel
mechanical properties
microstructure