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.
参考文献
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