摘要
系统地研究了熔融玻璃和循环过热相结合方法对净化效果的影响；提出了大体积液态金属获得深过冷的优化工艺；采用该工艺可快速、稳定地使６～２０ｇＮｉ８１．１５Ｓｉ１８．８５、Ｎｉ２８．６４Ｓｉ２１．３６、Ｎｉ７４．１７Ｓｉ２５．８３、Ｎｉ５０Ｃｕ５０、Ｆｅ７６Ｂ１２Ｓｉ１２合金分别获得２９９Ｋ（０２０２Ｔｍ）、２６９Ｋ（ｏ．１９Ｔｍ）、２６３Ｋ（０．１７２Ｔｍ）、３２０Ｋ（０．２０２Ｔｍ）、３６７Ｋ（０．２５７Ｔｍ）大过冷，并使其保持４～６个循环周期不衰减，同时采用该工艺还首次成功地制备Ｆｅ７６Ｂ１２Ｓｉ１２及Ｆｅ７６Ｂ１２Ｓｉ１０Ｃ２合金的块状纳米软磁材料。研究结果表明，净化玻璃的化学成分、循环过热温度及净化过程中熔融玻璃和合金液的良好排气条件是影响净化效果的主要因素。
Influencing factors of glass fluxing technique incorporated in the NiSi eutectic alloys.An optimum denucleation processing was introduced to possess notably the denucleation effects of cyclical superheating and glass fluxing on undercooling.By applying this technique, the maximum respective nudercoolings up to 299 K in Ni81.15Si18.85,269 K in Ni78.64Si21.36,263 K in Ni74.17Si25.83,320 K in Ni50Cu50,and 367 K in Fe76Si12B12 alloys can be achived and kept from attenuation for 46 cycles.Fe76B12Si12 and Fe76B12Si10C2 bulk nanocrystalline magnetic materials were first prepared with the technique.It was found that the chemical composition of glass,superheating temperature and the degasification in alloys and glass primarily influenced undercoolings of bulk liquid alloys. \=
出处
《铸造技术》
CAS
北大核心
1999年第3期40-43,共4页
Foundry Technology
基金
国家自然科学基金
国家航空基础科学基金
