本发明公开了一种铁基块体非晶合金的制备及热塑性成型方法，包括以下步骤：(1)向铁基块体非晶合金中添加稀土元素RE优化成分；(2)将步骤(1)优化后的成分元素按照分子式Fe_71‑xRE_xNb₆B₂₃中的原子百分比配制原料，其中x＝1‑7，在惰性气氛中使用电弧炉熔炼成成分均匀的母合金，将熔炼好的母合金在惰性气氛中喷铸到铜模中，得到铁基块体非晶合金；(3)将步骤(2)制备的铁基块体非晶合金，从室温加热到保温温度，保温后在保温状态下施加载荷压缩；压缩结束后卸载并立即停止加热，空冷冷却至室温。通过上述制造方法制备所得铁基块体非晶合金，过冷液相区宽度39‑90℃，临界尺寸1‑4.5mm，塑性变形高达30％，流变应力低于1000MPa。

The invention discloses a preparation and thermoplastic forming method of an iron-based bulk amorphous alloy. The method comprises the following steps: (1) adding the optimized composition of rare earth element RE to the iron-based bulk amorphous alloy; (2) The optimized component elements are prepared of step (1)according to the atomic percentage in the molecular formula Fe_71‑xRE_xNb₆B₂₃, where x=1‑7. Use an electric arc furnace to smelt a master alloy with uniform composition in an inert atmosphere, and place the smelted master alloy in an inert atmosphere. It is sprayed into a copper mold to obtain an iron-based bulk amorphous alloy; (3) The iron-based bulk amorphous alloy prepared in step (2) is heated from room temperature to the holding temperature, and the load is compressed in the holding state after holding ; After compression, unload and immediately stop heating, and air-cooled to room temperature. The iron-based bulk amorphous alloy prepared by the above-mentioned manufacturing method has a supercooled liquid zone width of 39-90°C, a critical size of 1-4.5mm, a plastic deformation of up to 30%, and a flow stress of less than 1000MPa.