论文部分内容阅读
本文用扫描电镜、电子探针、俄歇电子能谱和X射线方法对激光表面合金化层出现的一条抗腐蚀性能良好的“白亮带”进行了全面的分析和讨论。结果表明“白亮带”是由于熔体开始凝固时温度梯度对凝固速度比值G/R达到平面状向前推移的条件下形成的。结晶相是单相固溶体时,“白亮带的宽度随溶质浓度Coo的增加而变窄,而且与基体晶粒相连。由于某些组元存在着成分梯度,致使合金化层的相组成在定量分配上存在着一定的梯度。
In this paper, a scanning electron microscope, electron probe, Auger electron spectroscopy and X-ray method on the laser surface alloying layer appears a good corrosion resistance of the ”white with“ a comprehensive analysis and discussion. The results show that the ”white band" is formed when the melt starts to solidify and the temperature gradient to the solidification rate ratio G / R reaches a planar shape. When the crystalline phase is a single phase solid solution, the width of the white band narrows with the increase of solute concentration Coo and is connected with the matrix grains. Due to the compositional gradient of some components, the phase composition of the alloyed layer is quantitatively determined Distribution there is a certain gradient.