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本文是用电子探针研究ＧＨ９９合金中Ｍｇ、Ｚｒ的分布状态及其对该合金性能的影响。实验表明：Ｍｇ、Ｚｒ偏聚于晶界，Ｍｅ相界，并固溶于Ｍｃ之中，品界处Ｍｇ含量随合金中Ｍｇ含量的增加而增加，由于Ｍｇ的加入，使一次碳化物明显钝化，晶界处的一次碳化物减少；Ｚｒ对该合金的力学性能无影响，以后冶炼可不加Ｚｒ、Ｍｇ的最佳范围应０．００３６％～０．００８％（钢中残留量）
In this paper, the electron probe was used to study the distribution of Mg and Zr in GH99 alloy and its effect on the properties of the alloy. Experiments show that Mg and Zr segregate to the grain boundary and Me phase boundary and are dissolved in Mc. The Mg content in the grain boundary increases with the increase of Mg content in the alloy. The addition of Mg makes the first carbide obviously obtuse The first carbides decrease at the grain boundaries; Zr has no effect on the mechanical properties of the alloy, and the optimal range of the Mg after refining can be 0.0036% to 0.008% (the residual amount in the steel)