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对经激光淬火强化处理后的球墨铸铁QT800-2的强化区域再进行激光冲击强化处理进行了研究。结果表明,复合强化处理后的球墨铸铁QT800-2与经激光淬火强化处理区域相比,各项机械性能都得到了较大提高,其中硬度提高了18％,耐磨性提高了100％,尤其是材料内部残余应力全部变成了残余压应力。
The laser shock-strengthening treatment of the strengthened region of the ductile iron QT800-2 after laser quenching was further studied. The results show that the mechanical properties of the composite strengthened ductile iron QT800-2 are greatly improved compared with that of the laser quenched and tempered zone, with the hardness increased by 18% and the wear resistance increased by 100% All the residual stress in the material becomes residual compressive stress.