Results show when the surface of the screw are treated by laser namo- alloy, alloy layer can form metallurgy combination, abrasion resistance of the screw surface is raised by 2. 2;

• 结果表明；螺杆表面进行激光纳米合金化复合处理后；合金化层与基体形成了牢固的 冶金结合；表面平均硬度由原来的HV420提高到HV620；螺杆表面的的耐磨性提高了 2.；2倍;