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目的对ＧＨ８６０７双相铁基合金的时效过程、强化相析出和基体相变进行研究．方法采用高温Ｘ射线衍射、热膨胀分析、ＴＥＭ等试验手段．结果ＧＨ８６０７合金在时效时具有较高的硬化速率．析出相为碳化物（Ｍ２３Ｃ６，Ｍ６Ｃ）和金属间化合物（Ｌａｖｅｓ相、Ｘ相）．时效过程中出现δ→γ转变，并在随后的冷却中产生板条马氏体；时效后经多次重复加热，在马氏体中沉淀出强化相．结论ＧＨ８６０７合金具有高的时效温度和热强性，可用于制造在８５０℃以下工作的热挤压模具．
Aim To study the aging process, strengthening precipitation and matrix transformation of GH8607 dual-phase iron-based alloy. Methods High-temperature X-ray diffraction, thermal expansion analysis, TEM and other experimental methods. Results GH8607 alloy has a higher hardening rate in aging. Precipitates were carbides (M23C6, M6C) and intermetallics (Laves phase, phase X). During the aging process, δ → γ transformation occurs, and lath martensite is produced in the subsequent cooling; after repeated aging after aging, a strengthening phase precipitates in the martensite. Conclusion GH8607 alloy with high aging temperature and thermal strength, can be used in the manufacture of the following 850 ℃ hot extrusion die.