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采用强流脉冲电子束对ZK60镁合金进行表面改性,研究电子束处理后镁合金微观组织结构和耐磨性的变化。微观组织结果表明,电子束处理使ZK60镁合金表面熔化,晶界变得不明显,元素偏析得到改善,合金表面化学成分均匀化分布,且在镁合金表面生成一层厚为5–11μm的高致密度的重熔层,晶粒得到细化。耐磨性测试结果表明,电子束处理后镁合金的耐磨性明显提高,且15次脉冲处理的样品的耐磨性最好,其耐磨性是原样品的2.5倍。
The surface of ZK60 magnesium alloy was modified by pulsed electron beam, and the microstructure and wear resistance of the magnesium alloy after electron beam treatment were studied. The results of microstructure show that the electron beam treatment melts the surface of ZK60 magnesium alloy, the grain boundary becomes insignificant, the segregation of elements is improved, the chemical composition of the alloy surface is homogeneously distributed, and a layer of 5-11μm in thickness is formed on the surface of the magnesium alloy Re-melting density layer, grain refinement. The results of wear resistance test show that the wear resistance of the magnesium alloy after the electron beam treatment is obviously improved, and the samples treated with 15 pulses have the best wear resistance, and the abrasion resistance is 2.5 times that of the original sample.