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利用光学显微镜及高分辨透射电镜研究了Fe-2.0Cu合金连续冷却过程中的微观组织与沉淀析出,分析了不同冷速对沉淀析出的影响、硬度与组织及析出物三者之间的关系。结果表明,Fe-2.0Cu合金在连续冷却过程中,大量析出物以相间沉淀方式析出,随着冷却速度的增大析出物逐渐减少,对材料形成更强的强化作用。经过透射电镜能谱和衍射分析,确定析出物为富铜过渡相,这种富铜过渡相所形成的G.P区对合金起强化作用。
The microstructure and precipitation of Fe-2.0Cu alloy during continuous cooling were investigated by optical microscopy and high-resolution transmission electron microscopy. The effects of different cooling rates on precipitation, hardness, microstructure and precipitates were analyzed. The results show that during the continuous cooling process, Fe-2.0Cu alloy precipitates a large amount of precipitates precipitated by interphase precipitation. As the cooling rate increases, the precipitates gradually decrease, forming a stronger strengthening effect on the material. After transmission electron microscopy and diffraction analysis to determine the precipitates as copper-rich transition phase, the G. transition zone formed by the copper-rich alloy on the strengthening effect.