论文部分内容阅读
研究了用高速压制技术制备的纳米铜粉增强铁基合金制品的性能.在保持原料中铜粉总质量分数1.5%不变的情况下,将部分或全部微米级铜粉替换成纳米级铜粉,并通过高速压制技术制备了七种纳米铜粉质量分数分别为0、0.25%、0.50%、0.75%、1.00%、1.25%和1.50%的铁基合金制品试样,随后压坯于1150℃下烧结2 h.研究发现铁基合金烧结制品的组织和性能得到改善,且尺寸精度得到有效控制.当纳米铜质量分数为0.75%时,烧结态合金的抗拉强度和硬度分别达到720.6 MPa和94.7 HRB.纳米铜质量分数为0.25%~1.5%时,所得试样的轴向和径向收缩率分别在0.4%~0.7%和0.09%~0.23%之间.
The properties of iron-based alloy reinforced with nano-copper powder prepared by high-speed pressing technology were studied.When the total mass fraction of copper powder in the raw material remained unchanged at 1.5%, some or all of the micron-sized copper powder was replaced by nano-scale copper powder , And seven kinds of iron-based alloy samples with mass fractions of 0,0.25%, 0.50%, 0.75%, 1.00%, 1.25% and 1.50% were prepared by high-speed pressing technique, Under sintering for 2 h.The results show that the microstructure and properties of the sintered Fe-based alloy are improved and the dimensional accuracy is effectively controlled.When the mass fraction of nano-copper is 0.75%, the tensile strength and hardness of the sintered alloy reach 720.6 MPa and 94.7 HRB. The axial and radial shrinkage of the obtained samples were between 0.4% ~ 0.7% and 0.09% ~ 0.23% when the mass fraction of nano-copper was 0.25% ~ 1.5%.