日本日立制作所以减轻环境负担等新概念 ,重新评价铁道车辆的材料、结构及生产方式 ,开发了第二代铝合金车辆——“A- train”。本文介绍了新铝合金车辆的结构、特点 ,如 :采用摩擦搅拌焊工艺 (FSW)生产的高精度、高质量铝重皮车体 ,完全独立的模块式内部装饰等。此外 ,还阐述了铝合金的新接合技术—— FSW。 Japan’s Hitachi Manufacturing Co., Ltd. has developed a second-generation aluminum alloy vehicle, “A-train”, by re-evaluating the materials, structures and production methods of railway vehicles with new concepts such as reducing environmental burdens. This article describes the structure and features of the new aluminum alloy vehicle, such as the high-precision, high-quality aluminum heavy-duty car body produced by the FSW process and the completely independent modular interior decoration. In addition, the new bonding technology for aluminum alloys - FSW is also described.