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本文用扫描电镜和X射线对一种复杂的弥散强化Ni基高温合金的机械合金化进行了研究。实验表明,采用高能球磨的方法可以使原料中的各种金属粉末间形成机械固溶体,实现合金化。在球磨过程中,原料中的Cr-Ni基母合金以及W,Mo,Ta等元素不断向Ni基体中周溶,使Ni基固溶体γ_(Ni)的点阵参数逐渐增大。同时,超细氧化物粒子在基体中也逐步达到理想的分布状态。这种机械固溶体虽存在一定的微区成分偏离,但可以通过某些有效措施使之显著减小。本文对机械合金化工艺参数也进行了分析和讨论。
In this paper, the mechanical alloying of a complex dispersion-strengthened Ni-based superalloy was studied by scanning electron microscopy and X-ray. Experiments show that the use of high-energy ball milling method can make a variety of metal powders in the raw material to form a mechanical solid solution, to achieve alloying. During ball milling, Cr-Ni-based master alloys and W, Mo, Ta and other elements in the raw materials continuously dissolved into the Ni matrix, and the lattice parameters of the Ni-based solid solution γ_ (Ni) gradually increased. At the same time, ultrafine oxide particles in the matrix gradually reached the desired distribution. Although there are some deviations of the micro-domains in this kind of mechanical solid solution, it can be significantly reduced by some effective measures. In this paper, mechanical alloying process parameters are also analyzed and discussed.