纳米陶瓷颗粒对超高强铝合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2025.06.005

摘要/Abstract

摘要： 采用光学显微镜、电子探针等方法,结合室温拉伸试验对含有2.0%纳米陶瓷颗粒的Al-NCP丝材以及不同纳米陶瓷颗粒添加量(0%、0.02%、0.08%、0.20%)的超高强铝合金进行了组织观察和性能测试。结果表明,Al-NCP丝材中主要含有纳米尺度的TiC以及TiB₂颗粒以及少量的微米级AlTi化合物。随着纳米陶瓷颗粒添加量的增加,铸态铝合金组织逐渐细化,大尺寸共晶化合物数量显著减少,热轧板边裂倾向也逐渐减少直至消失。纳米陶瓷颗粒的添加抑制了板材固溶过程中再结晶的发生,同时减少了组织中大尺寸化合物的数量,从而使T4、T6态板材具有高强度的同时还具有较好的塑性。T4态板材的屈服强度均超过500 MPa,抗拉强度超过600 MPa,伸长率超过18%;T6态板材屈服强度均超过600 MPa,抗拉强度超过700 MPa,伸长率均在12%以上。

关键词: 纳米陶瓷颗粒, 超高强铝合金, 微观组织, 拉伸性能

Abstract: Microstructure and properties of Al-NCP wire containing 2.0% nano-ceramic particles (NCP) and ultra-high strength aluminum alloys with different amounts (0%, 0.02%, 0.08%, 0.20%) of NCP were observed and tested by using optical microscope, electron probe, and room temperature tensile tests. The results indicate that the Al-NCP wire mainly contains nano scale TiC and TiB₂ particles, as well as a small amount of micrometer-sized AlTi compounds. With the increase of the amount of NCP, the microstructure of the as-cast aluminum alloys gradually refines, the amount of large-sized eutectic compounds significantly decreases, and the tendency of edge cracking in hot-rolled plates gradually decreases until it disappears. The addition of NCP suppresses the occurrence of recrystallization during the solid solution process of the plate, while reducing the amount of large-sized compounds in the microstructure, thus making plates in T4 and T6 states have high strength and good plasticity. The yield strength and tensile strength of plates in T4 state exceed 500 MPa and 600 MPa, respectively, and the elongation exceeds 18%. The yield strength and tensile strength of plates in T6 state exceed 600 MPa and 700 MPa, respectively, and the elongation is above 12%.

Key words: nano-ceramic particle, ultra-strength aluminum alloy, microstructure, tensile properties

中图分类号:

TG146.2

陶乐晓. 纳米陶瓷颗粒对超高强铝合金组织与性能的影响[J]. 金属热处理, 2025, 50(6): 27-31.

Tao Lexiao. Influence of nano-ceramic particles on microstructure and properties of ultra-strength aluminum alloy[J]. Heat Treatment of Metals, 2025, 50(6): 27-31.

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