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本文研究了不同硼含量对Ｆｅ－２８Ａｌ－１．９４Ｃｒ合金组织结构和室温、高温力学性能的影响．加入０．０３８ａｔ．－％Ｂ后，有细小的（Ｆｅ，Ｃｒ）_２Ｂ相析出，随着硼含量增加，析出相增多增大，加入１．１８ａｔ．－％Ｂ后，析出相变成网络状．０．０３８－０．２２ａｔ．－％Ｂ可明显改善合金的塑性和强度，０．０３８ａｔ．－％Ｂ使合金压缩屈服强度由５３２ＭＰａ提高到６７８ＭＰａ，塑性由１５％提高到２５％，过量的硼不但降低了合金的塑性，也使强度明显下降．６００℃时，较低的硼含量对塑性有利，而较高的硼含量则可以提高高温强度．
In this paper, the effects of different boron contents on the microstructure and mechanical properties of Fe-28Al-1.94Cr alloy at room temperature and high temperature were studied. Add 0.038at. -% B, there is a small (Fe, Cr) _2B phase precipitation, with the increase of boron content, precipitated phase increases, adding 1.18at. -% B, the precipitated phase into a network. 0.038-0.22at. -% B can significantly improve the plasticity and strength of the alloy, 0.038at. -% B increased the compressive yield strength of the alloy from 532 MPa to 678 MPa and the plasticity increased from 15% to 25%. Excess boron not only reduced the plasticity of the alloy, but also markedly decreased the strength. At 600 ° C, the lower boron content favors ductility, whereas the higher boron content increases the high temperature strength.