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用穆斯堡尔谱学、X射线衍射及电解萃取等实验方法研究了Fe-Ni-Al-Ti半硬磁合金在加工过程中相结构的变化。1050℃淬火态合金为具有体心立方结构的单一的铁磁固溶体,其穆斯堡尔谱为峰形不对称的宽六指峰。第一次冷轧和700℃软化回火后有合金元素自母体脱溶,穆斯堡尔谱上开始出现顺磁峰。再经第二次冷轧和650℃最终回火,穆斯堡尔谱中的顺磁峰明显增高,而六指峰明显变窄,结合X射线衍射分析,可以确定回火时有相当多含铁的NiAl相和Ni_3Al或Ni_3(Al,Ti)相粒子生成。由透射电子显微镜观察,可看到这些细小的颗粒状粒
The phase structure of Fe-Ni-Al-Ti semi-hard alloy during working process was investigated by means of Mossbauer spectroscopy, X-ray diffraction and electrolytic extraction. The quenched alloy at 1050 ℃ is a single ferromagnetic solid solution with a body-centered cubic structure. The Mossbauer spectrum is a broad six-finger peak with asymmetric peak shape. After the first cold rolling and 700 ℃ softening and tempering, alloying elements desolubilized from the matrix, and the Mpbauw spectrum began to exhibit paramagnetic peak. After the second cold rolling and the final tempering at 650 ℃, the paramagnetic peak in Mössbauer spectrum increased obviously, while the six-finger peak became narrower obviously. Combined with X-ray diffraction analysis, it was confirmed that there was considerable iron Of NiAl phase and Ni_3Al or Ni_3 (Al, Ti) phase particles generated. Observed by transmission electron microscopy, these fine granular particles can be seen