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利用电磁成形技术制备连续碳纤维增强铝基复合材料,解决了传统制备工艺中界面反应严重、制备周期长、设备要求高等问题。在碳纤维预热温度为380℃,熔炼温度为900℃,最终保温温度为750℃等工艺参数下,研究了电磁成形过程中放电电压对复合材料微观组织和力学性能的影响。结果表明,当放电电压为2 500V时,复合材料界面平整,结合良好,界面处未见Al_4C_3脆性相的生成,且相比基体,复合材料的抗拉强度从91.10 MPa提高到了101.76 MPa,增加了11.7%,硬度(HBW)达到35.8。
The use of electromagnetic forming technology to prepare continuous carbon fiber reinforced aluminum matrix composite material, which solves the problems of serious interface reaction, long preparation period and high equipment requirement in the traditional preparation process. The effects of discharge voltage on the microstructure and mechanical properties of the composites were investigated under the parameters of carbon fiber preheating temperature of 380 ℃, melting temperature of 900 ℃ and final holding temperature of 750 ℃. The results show that when the discharge voltage is 2 500 V, the interface of the composites is flat and well bonded, and no brittle phase of Al 4 C 3 is formed at the interface. Compared with the matrix, the tensile strength of the composites increases from 91.10 MPa to 101.76 MPa, 11.7%, hardness (HBW) reached 35.8.