介绍了10Cr21Mn16NiN钢线材成分设计、增氮原理、冶炼工艺、轧制和固溶工艺、Cr_(2)N相析出的生产工艺。采用30 t AOD精炼,吹氮气增氮,精炼后期加氮化锰。轧制时采用1240℃加热、控轧控冷,保证了盘条表面质量,避免了中心缩孔等问题;固...介绍了10Cr21Mn16NiN钢线材成分设计、增氮原理、冶炼工艺、轧制和固溶工艺、Cr_(2)N相析出的生产工艺。采用30 t AOD精炼,吹氮气增氮,精炼后期加氮化锰。轧制时采用1240℃加热、控轧控冷,保证了盘条表面质量,避免了中心缩孔等问题;固溶温度应控制在1100℃左右,且保温30 min后快冷,可防止Cr_(2)N相析出。成功生产出表面质量和性能优良的10Cr21Mn16NiN不锈钢线材。展开更多
Fe-N thin films were fabricated on both 100Si and NaCl substrates by RF magnetron sputtering under low nitrogen partial pressure. The microstructure and magnetic properties of Fe-N thin films were investigated with th...Fe-N thin films were fabricated on both 100Si and NaCl substrates by RF magnetron sputtering under low nitrogen partial pressure. The microstructure and magnetic properties of Fe-N thin films were investigated with the increase of the substrate temperature （Ts） and the annealing temperature （Ta）. It is more difficult for nitrogen atoms to enter the Fe lattice under higher Ts above 150℃. The phase evolution is visible at higher Ta above 200℃. The phase transformation of α＇＇-Fe16N2 occurred at 400℃. The change of crystal size with Ta was clearly visible from bright and dark field images. The clear high-resolution electron microscope （HREM） images of 110α, 111γ＇, 112α＇＇, and 200α＇＇ phases were observed. The interplanar distances from TEM （transmission electron microscope） and HREM match the calculated values very well. From the results of the vibrating sample magnetometer （VSM）, the good magnetic properties of Fe-N films were obtained at 150℃ of Ts and 200℃ of Ta, respectively.展开更多
Though the structure of α"-Fe<sub>16</sub>N<sub>2</sub> was well known, the great interest in Fe<sub>16</sub>N<sub>2</sub> arose from its giant saturation magnetic...Though the structure of α"-Fe<sub>16</sub>N<sub>2</sub> was well known, the great interest in Fe<sub>16</sub>N<sub>2</sub> arose from its giant saturation magnetic flux density which was found to be 2.58T at room temperature. The research work on preparing Fe<sub>16</sub>N<sub>2</sub> in high abundance is active on both bulk materials and thin film form. However, up to now, only Sugita and his coworkers have successfully prepared Fe<sub>16</sub>N<sub>2</sub> single-crystal films on semiconductor substrates because of its metastable property. They manifested that the M<sub>s</sub> was up to 2.9 T at展开更多
文摘介绍了10Cr21Mn16NiN钢线材成分设计、增氮原理、冶炼工艺、轧制和固溶工艺、Cr_(2)N相析出的生产工艺。采用30 t AOD精炼,吹氮气增氮,精炼后期加氮化锰。轧制时采用1240℃加热、控轧控冷,保证了盘条表面质量,避免了中心缩孔等问题;固溶温度应控制在1100℃左右,且保温30 min后快冷,可防止Cr_(2)N相析出。成功生产出表面质量和性能优良的10Cr21Mn16NiN不锈钢线材。
基金supported by the National Natural Science Foundation of China(No.50674071)Tianjin Natural Science Foundation of China(No.06YFJZJC01300)+1 种基金the Program for New Century Excellent Talents in University(NCET-06-0245)the Platform Project of Tianjin for Innovation in Science and Technology and Environmental Construction(No.06TXTJJC13900).
文摘Fe-N thin films were fabricated on both 100Si and NaCl substrates by RF magnetron sputtering under low nitrogen partial pressure. The microstructure and magnetic properties of Fe-N thin films were investigated with the increase of the substrate temperature （Ts） and the annealing temperature （Ta）. It is more difficult for nitrogen atoms to enter the Fe lattice under higher Ts above 150℃. The phase evolution is visible at higher Ta above 200℃. The phase transformation of α＇＇-Fe16N2 occurred at 400℃. The change of crystal size with Ta was clearly visible from bright and dark field images. The clear high-resolution electron microscope （HREM） images of 110α, 111γ＇, 112α＇＇, and 200α＇＇ phases were observed. The interplanar distances from TEM （transmission electron microscope） and HREM match the calculated values very well. From the results of the vibrating sample magnetometer （VSM）, the good magnetic properties of Fe-N films were obtained at 150℃ of Ts and 200℃ of Ta, respectively.
基金the National Natural Science Foundation of China.
文摘Though the structure of α"-Fe<sub>16</sub>N<sub>2</sub> was well known, the great interest in Fe<sub>16</sub>N<sub>2</sub> arose from its giant saturation magnetic flux density which was found to be 2.58T at room temperature. The research work on preparing Fe<sub>16</sub>N<sub>2</sub> in high abundance is active on both bulk materials and thin film form. However, up to now, only Sugita and his coworkers have successfully prepared Fe<sub>16</sub>N<sub>2</sub> single-crystal films on semiconductor substrates because of its metastable property. They manifested that the M<sub>s</sub> was up to 2.9 T at
