【摘要】 首次采用搅拌摩擦加工(FSP)对CuCr30合金进行了加工，对比研究了FSP前后CuCr30合金的微观组织和电弧烧蚀性能。结果表明，母材中，Cu、Cr两相晶粒尺寸分别为3.56～34.16μm和4.77～32.36μm; FSP后，Cu、Cr两相晶粒尺寸分别细化为40～500 nm和50～329 nm。经过30次和100次击穿实验后，FSP试样的质量损失比母材分别降低了77.8%和39.2%。击穿100次后，母材和FSP试样的烧蚀面积分别为6.91和8.01 mm~2,表明FSP试样中细化的Cr相分散了电弧能量，使得烧蚀区域均匀、分散，从而提高了CuCr30合金的电弧烧蚀性能。更多还原

【Abstract】 CuCr30 alloy was processed by friction stir processing(FSP) for the first time. The comparative study of microstructure and arc ablation performance of CuCr30 alloy before and after FSP was carried out. The results show that the grain sizes of Cu and Cr phases in base metal are 3.56-34.16 μm and 4.77-32.36 μm, respectively. After FSP, the grain sizes of Cu and Cr phases are refined to 40-500 nm and 50-329 nm, respectively. Compared with the base metal, the mass loss of the FSP samples after 30 and 100 times of vacuum breakdown experiments is reduced by 77.8% and 39.2%,respectively.The ablation areas of the base metal and FSP samples after 100 times of vacuum breakdown experiments are 6.91 and 8.01 mm~2, respectively, which indicates that the refined Cr phase in the FSP samples disperses the arc energy, resulting in the ablation area being uniform and scattered, and thus improving the arc ablation performance of CuCr30 alloy.更多还原