Fe40—45Cr30—35Co20—25Mo0—4Zr0—2合金微观结构对矫顽力的影响

研究了高矫顽力型FeCrCo合金的磁性和微观结构.实验结果表明，适当的合金成分及热处理 条件可以明显提高FeCrCo合金的矫顽力.通过透射电镜、x射线衍射等手段得出结论：主体元 素含量的提高和微量元素的掺杂可以有效地控制相的组成，磁场热处理导致强磁性相和弱磁 性相的分离，回火后形成起磁硬化作用的调幅结构.该调幅结构中较大的两相成分差有利于 提高FeCrCo合金的矫顽力. 关键词： 矫顽力 调幅分解 磁场热处理 两相结构 成分差

Effect of microstructure on the coercivity of Fe40-45Cr30-35Co20-25Mo0-4Zr0-2 alloy

We have studied the magnetic properties, microstructure, and mechanical properti es of a high-coercivity FeCrCo alloy. Based on the experiments, the high-coerciv ity can be obtained by selecting suitable composition and heat treatment process . According to the TEM and XRD results, we drew a conclusion that the main eleme nt and the minor metallic dopants control effectively the conformation of phases . Thermomagnetic treatment induces the separation of the ferromagnetic and param agnetic phases, and a spinodal structure forms that results in magnetic-hardenin g. The large composition contrast between the two phases could improve the coer civity of the FeCrCo alloy obviously