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作者借助光学显微镜、电子探针和互射线衍射仪研究了激光工艺参数及预涂复层（Ｃｒ－Ｎｉ）厚度对低碳钢熔区的成分、显微结构、形状系数以及耐蚀性的影响．实验结果表明，激光功率和预涂复层厚度极大地影响表面合金层的成分合量、分布及合金层的宽度与深度，但受扫描速度的影响较小．通过近取适当的工艺参数，可以获得合金成分均匀分布的表面合金层，在５％Ｈ２ＳＯ４中耐蚀性可以与１８－８不锈钢相媲美．
The authors studied the effects of laser parameters and pre-coating thickness (Cr-Ni) on the composition, microstructure, shape factor and corrosion resistance of mild steel in molten zone by means of optical microscope, electron probe and cross-ray diffractometer . The experimental results show that the laser power and the thickness of the precoating layer greatly affect the composition and distribution of the alloy layer and the width and depth of the alloy layer, but are less affected by the scanning speed. By taking the appropriate process parameters, the surface alloy layer with uniform composition of the alloy can be obtained, and the corrosion resistance in 5% H2SO4 is comparable with that of 18-8 stainless steel.