Scholarlink

<p>This study addresses the issues of coarse microstructure and defects in traditionally cast Al-Cu alloys, as well as the high cost and difficulty in forming complex components via forging, by exploring the application of an integrated casting–forging forming process in the preparation of Al-Cu-Cd alloy gear disks. By comparing the non-forged and forged processes, forging can significantly refine the grain size of the alloy. After T6 heat treatment, the tensile strength of the forged alloy reaches 461&#xa0;MPa, and it achieves the maximum solid solution extent after 6&#xa0;h of solution treatment, which is shorter than the time required for the non-forged alloy. The T6-temper alloy contains a large number of θ′′ phase, which play a dominant role in the strength of the alloy. A twin structure is present in the Al₂₀Cu₂Mn₃ phase of the alloy, which improves the properties of the alloy to a certain extent. The Cd element primarily attaches to both ends and the middle of the precipitated phase (θ′′ phase), serving as heterogeneous nucleation sites during the aging process. This increases the number density of the θ′′ phase, thereby improving the alloy’s strength.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on Microstructure and Mechanical Properties of Al-Cu Alloy Gear Disk Fabricated by Integrated Casting–Forging Process

  • 期刊论文

  • 发表日期：

    2026年5月25日

查看全文
  • Chenxi Ma,
  • Peng Shen,
  • Jiahao Gao,
  • Jingman Xu

摘要

This study addresses the issues of coarse microstructure and defects in traditionally cast Al-Cu alloys, as well as the high cost and difficulty in forming complex components via forging, by exploring the application of an integrated casting–forging forming process in the preparation of Al-Cu-Cd alloy gear disks. By comparing the non-forged and forged processes, forging can significantly refine the grain size of the alloy. After T6 heat treatment, the tensile strength of the forged alloy reaches 461 MPa, and it achieves the maximum solid solution extent after 6 h of solution treatment, which is shorter than the time required for the non-forged alloy. The T6-temper alloy contains a large number of θ′′ phase, which play a dominant role in the strength of the alloy. A twin structure is present in the Al₂₀Cu₂Mn₃ phase of the alloy, which improves the properties of the alloy to a certain extent. The Cd element primarily attaches to both ends and the middle of the precipitated phase (θ′′ phase), serving as heterogeneous nucleation sites during the aging process. This increases the number density of the θ′′ phase, thereby improving the alloy’s strength.