比较了混合稀土(La-Ce)对快速凝固Cu-Cr合金不同状态下组织和性能的影响,结果表明:在急冷态,稀土元素消除了Cu-Cr合金部分柱状晶,稀土元素本身的添加使显微硬度有所提高;抑制时效后Cu-Cr合金二次Cr颗粒的析出,使硬度值随时效温度变化相对比较平稳,提高热稳定性,延缓了过时效的发生.此外,稀土元素改变了Cu-Cr合金共晶组织的短棒状或层片状形态,大多以网状共晶组织存在,经退火共晶组织更加清晰化.
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