论文部分内容阅读
冶合学研究 1.电子探针,X射线显微分析利用扫描电子探针x射线显微分析仪,对界面进行线扫描。据能够同时测定两种元素的分析仪得出的铜、铝、铁和硅的典型的浓度曲线表明:钢-青铜界面内的铜和铝浓度是突然下降的,这说明了在钢-青铜这两种材料之间扩散得最少;而在青铜-铝合金焊缝界面上,被分析的元素的强度在它们达到稳定值之前有很大的波动,这说明了成分的不均匀性以及可能存在着由这些元素按不同含量构成的各种相。对于不同的线能量情况和沿着堆焊焊缝界面的不同线扫描方向得到许多这样的记录。由这些记录得到的数据归纳绘在图14a和b上。可以看到(图14a),对于所有的线能量情况,都测得几乎对应着100％硅的峰值,表明了在组织中含有纯硅。从铜-铝曲线(图14b)显见,即使采用了最低的线能量条件,有几个相还是免不了要生成的。然而,关于线能量对铜和铝的变化的影响要得出一个明确的结论却是很困难的;此外,这
Metallurgical research 1. Electron probe, X-ray microanalysis Scanning electron probe X-ray microanalyzer, the interface line scan. A typical concentration curve for copper, aluminum, iron and silicon from an analyzer capable of simultaneous determination of both elements shows a sudden drop in the concentration of copper and aluminum in the steel-bronze interface, indicating that in steel-bronze The least diffusion occurs between the two materials; whereas, at the bronze-aluminum alloy weld interface, the strength of the analyzed elements fluctuates greatly before they reach a steady state, indicating the inhomogeneity of the composition and the possible presence of By these elements according to the different content of the various phases. Many such records are obtained for different line energy conditions and different line scan directions along the build-up weld interface. The data obtained from these records are summarized in Figures 14a and b. As can be seen (Figure 14a), for all line energy cases, the peak corresponding to almost 100% of the silicon was measured, indicating the presence of pure silicon in the tissue. From the copper-aluminum curve (Figure 14b), it is evident that several phases are inevitably generated even with the lowest possible linear energy conditions. However, it is difficult to draw a clear conclusion about the effect of line energy on the changes in copper and aluminum; moreover, this