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以典型的珠光体钢U75V重轨钢为例,介绍了一种利用电子探针分析(EPMA)测定钢中珠光体平均片层间距的方法。选择尽量垂直于珠光体片层的法线方向作为扫描路径,得到碳含量分布曲线为“波峰”+“波谷”的形状,两个“波峰”或“波谷”之间的距离即为一个珠光体片层间距,由于扫描路径长度已知,通过计算扫描路径上“波峰”或“波谷”的数量就可以获得该视场下珠光体的平均片层间距。此法直观、简单、计算量少,所测得的珠光体平均片层间距更接近其真实平均片层间距。
Taking a typical pearlite U75V heavy rail steel as an example, a method for determining the average lamellar spacing of pearlite in steel by electron probe analysis (EPMA) is introduced. Select as perpendicular to the normal direction of the pearlite sheet as the scan path to get the carbon content distribution curve as “crest ” + “trough ” shape, two “crest” or “trough” Since the distance between two pearlite layers is known, the average lamellar thickness of the pearlite in the field of view can be obtained by calculating the number of “crests” or “troughs” on the scan path because the length of the scan path is known spacing. This method is intuitive, simple, and less computationally intensive. The measured average pearlite spacing is closer to its true average spacing.