论文部分内容阅读
在拉拔速度1.0～1.4mm/s、变形温度600～900℃的条件下,对具有连续柱状晶组织的Cu-12%Al(质量分数)合金线材进行了无模拉拔成形,分析了变形后合金的显微组织和力学性能,研究了线材无模拉拔变形行为.结果表明:在拉拔速度1.0～1.4mm/s、变形温度600～900℃的条件下,连续柱状晶组织Cu-12%Al合金线材在无模拉拔成形过程中没有发生再结晶现象.当拉拔速度为1.0mm/s时,随着变形温度从600℃升高到900℃,连续柱状晶组织Cu-12%Al合金线材的晶界在无模拉拔成形过程中逐渐变得不平直;无模拉拔成形后合金线材的延伸率随着变形温度的升高而降低,抗拉强度随着变形温度的升高而升高.在变形温度为600℃的条件下,当拉拔速度为1.1～1.2mm/s时,无模拉拔成形对合金线材组织的影响不明显;当拉拔速度达到1.3～1.4mm/s时,合金线材连续柱状晶晶界变得不平直;在本文实验范围内无模拉拔速度的变化对合金线材延伸率和抗拉强度影响不大.
Under the conditions of drawing speed of 1.0 ~ 1.4mm / s and deformation temperature of 600 ~ 900 ℃, the Cu-12% Al alloy wire with continuous columnar crystal structure was drawn without die and the deformation was analyzed The microstructure and mechanical properties of the as-received alloy were investigated.The results show that under the condition of drawing speed 1.0 ~ 1.4mm / s and deformation temperature 600 ~ 900 ℃, the continuous columnar grain structure Cu- No recrystallization occurred in the 12% Al alloy wire during the die-less drawing process.When the drawing speed was 1.0 mm / s, as the deformation temperature increased from 600 ℃ to 900 ℃, the continuous columnar crystal structure Cu-12 The grain boundaries of% Al alloy wire gradually become uneven during the die-less drawing process. The elongation of the alloy wire decreases with the increase of the deformation temperature after die-less drawing. The tensile strength decreases with the deformation temperature When the drawing speed is 1.1 ~ 1.2mm / s, the effect of dieless drawing on the microstructure of the alloy wire is not obvious; when the drawing speed reaches 1.3 ~ 1.4mm / s, the continuous columnar grain boundaries of the alloy wire become uneven; in the experimental range of this article, the dieless drawing speed Little effect on the elongation and tensile strength alloy wire.