本文介绍一种自制双子、差示、高温量热计,此仪器用于测量固态合金的生成焓和相变焓。最高工作温度可达1200℃。通过测定已知焓值的纯铁的相变焓,证明量热计可靠。用这台量热计测量了8种不同成份的Fe-Ni-V固态合金的生成焓,其中包含σ相和γ相。为该体系的热力学研究提供了必要的热化学数据。 This article describes a homemade Gemini, differential, high temperature calorimeter, the instrument used to measure the formation of solid-state alloy enthalpy and phase transition. The maximum working temperature up to 1200 ℃. By measuring the enthalpy of phase transition of pure iron with known enthalpy, the calorimeter is proved to be reliable. The enthalpies of formation of Fe-Ni-V solid-state alloys of eight different compositions were measured using this gage, including σ and γ phases. The thermodynamic study provided the necessary thermochemical data for the system.