电解法在大规格试样金相检验中的应用

Application of Electrolysis Method in Metallographic Test for Large-Sized Samples

  • 摘要: 为解决大规格试样的金相检验效率低,无法实现快速现场检测的问题,本研究采用便携式电解装置对大规格试样进行定位多点制样,通过激光共聚焦显微镜和金相显微镜观察45#钢和TC4钛合金电解抛光后的表面轮廓和金相组织,考察了电解电流对大规格金相试样电解制样效果的影响。研究表明,45#钢的电解电流适宜范围为0.7~1.5 A,TC4钛合金的电解电流适宜范围为1.0~1.5 A。并介绍了电解法在大规格金相试样的组织均匀性分析、低倍缺陷类型判断、现场金相快速检测中的应用,讨论了该制样方法的使用范围。

     

    Abstract: The efficiency of metallographic test of large-sized sample is low, and the rapid on-site test cannot be achieved. To solve the above questions, the portable electrolysis device is adopted to locate positions in the large-sized sample to prepare test samples. The surface profiles and metallographic structures of 45# steel and TC4 alloy are observed and analyzed through laser scanning confocal microscope and metallographic microscope, and the effects of electrolytic current on the sampling of different materials are examined. Results show that the electrolytic current ranges suitable for 45# steel and TC4 alloy are 0.7-1.5 A and 1.0-1.5 A, respectively. The applications of electrolytic method in the microstructure heterogeneity analysis, defect type determination with low magnification, and rapid on-site metallography detection of large-sized sample are introduced, and the applicability of sampling by electrolytic method is discussed.

     

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