The influence of sintering temperature and content of high-carbon ferrochrome on the phase composition, structure, and mechanical properties of chromium carbide powder steels was studied. When sintering temperature changed from 1100 to 1250°C, the bulk shrinkage, density, porosity, hardness, and bending strength of the iron-based composites with high-carbon ferrochrome FKh800 varying from 25 to 40 wt.% increased nonmonotonically and their porosity decreased. The optimal sintering conditions were established for the Fe–(25–40 wt.%) FKh800 composites, and FKh800 content in the composition range under study was found to hardly influence the optimal sintering temperature of the composites. A vertical section was constructed by analytical/graphical method and demonstrated wide regions of two-phase (γ-Fe) + (Cr, Fe)₇C₃ and (α-Fe) + (Cr, Fe)₇C₃ equilibria. The constructed vertical section allowed the eutectic composition and eutectic formation temperature to be determined for the iron-based composites with FKh800, which were 73.7 wt.% Fe–26.3 wt.% FKh800 and 1285°C, and a tentative optimal sintering range to be found, which varied from 1100 to 1250°C. Electron microscopy studies of the carbide steels showed that their microstructure was heterogeneous and consisted of metallic and carbide phases and a number of pores. According to electron microprobe analysis and X-ray diffraction of the carbide steel, its metallic phase was close in composition to chromium steel Kh17 and its carbide phase corresponded to (Cr, Fe)₇C₃. The effect of 25–40 wt.% high-carbon ferrochrome on the mechanical properties of the composites was examined. When FKh800 content changed from 25 to 35 wt.%, the hardness and bending strength increased and fracture toughness decreased. The optimal combination of these mechanical properties was shown by the 65 wt.% Fe–35 wt.% FKh800 carbide steel.

研究了烧结温度和高碳铬铁含量对碳化铬粉末钢的相组成、组织和力学性能的影响。当烧结温度从 1100°C 变化到 1250°C 时，含高碳铬铁 FKh800 的铁基复合材料的体积收缩率、密度、孔隙率、硬度和弯曲强度在 25~40 wt.% 之间非单调增加，孔隙率降低. 为 Fe–(25–40 wt.%) FKh800 复合材料建立了最佳烧结条件，发现所研究的组成范围内的 FKh800 含量几乎不会影响复合材料的最佳烧结温度。通过分析/图形方法构建了一个垂直截面，并展示了两相 (γ-Fe) + (Cr, Fe) _{7 的}宽区域C ₃和(α-Fe) + (Cr, Fe) ₇ C ₃平衡。构建的垂直截面允许使用 FKh800 确定铁基复合材料的共晶成分和共晶形成温度，即 73.7 wt.% Fe–26.3 wt.% FKh800 和 1285°C，暂定最佳烧结范围为发现，从 1100 到 1250°C 不等。碳化物钢的电子显微镜研究表明，它们的微观结构是异质的，由金属相和碳化物相以及许多孔组成。根据该碳化物钢的电子探针分析和X射线衍射，其金属相成分与铬钢Kh17接近，碳化物相对应于(Cr, Fe) ₇ C ₃. 检查了 25-40 wt.% 高碳铬铁对复合材料机械性能的影响。当 FKh800 含量从 25 到 35 wt.% 时，硬度和弯曲强度增加，断裂韧性降低。65 wt.% Fe–35 wt.% FKh800 碳化物钢显示了这些机械性能的最佳组合。