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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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铜钢异质复合材料连接特性的分析
Keywords: 复合材料,45钢,304不锈钢,t2铜,真空熔铸,界面分析
Abstract:
？用真空熔铸法制备45/t2、304/t2复合材料,用金相观察、扫描电镜及能谱分析、x射线衍射、力学性能测试等手段研究了钢铜复合界面的结合强度、显微组织、显微硬度、界相区的成分变化等。结果表明:钢铜基体中的fe、cr、cu等合金元素在界面发生了相互扩散,形成了新的铁碳化合物(cfe15.1)和固溶体cu0.81ni0.19、cr-ni-fe-c相。在界面上有齿状的过渡带,未出现明显的金属间化合物,其显微硬度最大值为183/119hv,宽度约为60-70μm。钢铜复合材料的抗拉、抗剪强度分别278/263mpa、217/201mpa,拉伸断口均出现在t2铜侧,远离界面扩散区域；界面结合机制均为扩散冶金结合,强度高于纯铜的抗拉/抗剪强度；在(1150±50℃、4.0×10-2pa)条件下,与cr、ni等合金元素相比,fe在cu液中的扩散能力最强,而cu对改善304/45钢的基体稳定性和强度也有重要的作用。
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