钢基-铍铜在浸涂下结合

• 作 者: 吴卫 向军 魏晓伟
• 机 构: 四川工业学院
• 出 处: 铸造
• 发表日期: 1998年11期
• 关键词: 浸涂 钢基 双金属复合材料 显微硬度 钢棒 铍铜 铁原子 电子扫描电镜 金属表面处理 铜层

将钢棒表面涂上保护剂并预热至６００～７００℃，浸入１１００℃的铍铜合金液中并保持１０～１５秒钟，将有１ｍｍ～２ｍｍ厚的铜层凝固在钢棒的表面上。利用显微分析、电子探针和电子扫描电镜，检测了两种合金结合的界面状况。结果表明，两相金属结合良好，在界面两侧，均发现原子的扩散。在铜侧，铁原子聚集在铜的晶界上。试样表面的维氏显微硬度在铸态和热处理后分别为（平均值）７７和１０２，比纯铍铜试棒的硬度低。

The surface of the steel bar coated with a protective agent and preheated to 600 ~ 700 ℃, immersed in 1100 ℃ beryllium copper alloy solution and hold for 10 to 15 seconds, a 1mm ~ 2mm thick copper layer solidified on the surface of the steel bar . Using microanalysis, electron probe and scanning electron microscopy, the interface conditions of the two alloys were examined. The results show that the two-phase metal is well bonded and atomic diffusion is found on both sides of the interface. On the copper side, the iron atoms gather on the grain boundaries of the copper. The Vickers microhardness of the sample surface is (average) 77 and 102 after as-cast and heat treatment, respectively, which is lower than that of the pure beryllium copper test rod.