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高纯净GCr15轴承钢组织演变与快速球化工艺的研究闫文凯1,2,杨卯生2,杜景红0,俞峰1(1.云南省昆明市昆明理工大学材料科学与工程学院2.北京市钢铁研究总院结构材料研究所)摘 要:利用碳化物的金相形貌,数量,大小,分布及圆整度表征试验钢的球化质量,通过不同的热处理制度研究高纯净GCr15轴承钢预备组织与退火工艺对碳化物球化质量的影响.试验表明:优良的预备组织适宜的退火制度有利于碳化物在短时间内球化和细化,采用文中退火制度a,GCr15轴承钢碳化物圆整度为0.087μm,平均粒径为0.27μm,球化时间比传统......
h). Also, when mechanical activation with subsequent heat treatment was employed to synthesize NiAl2O4 spinel, a high annealing temperature (above 1100 °C) was required. Therefore, the aim...Trans. Nonferrous Met. Soc. China 26(2016) 2910-2915 Synthesis of nickel aluminate nanoceramic compound from aluminum and nickel carbonate by mechanical alloying with subsequent annealing M......
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on the alloy composition and annealing treatment were studied in detail by an optical microscope, X-ray diffraction, and differential scanning calorimeters methods. The experimental results show... of structural differences resulting from alloy composition and annealing treatment.关键词:......
annealing at temperatures of 475, 500, 525 and 550 ℃ for 15 and 30 min, respectively, it is found that high Nb content is beneficial to improving thermal stability of amorphous films. The crystallized films have the mean grain size of 2-19 nm. Key words: CoNbZr amorphous film; magnetron co-sputtering; isothermal annealing ......
used as the main index in addition to XRD analysis. The effect of film layers, embedding Ag+, annealing temperature and time on the degradation ratio and antibacterial property was studied...-Ag/TiO2; water-sol; film; thermal treatment ......
到80%以上,直接跃迁模型确定的光学禁带宽度Eg呈现了先升后降的变化.ITO?Zr薄膜比ITO薄膜显示了更高的效益指数,揭示了ITO?Zr薄膜具有更好的光电性能. 关键词:ITO薄膜；磁控溅射；退火处理；光电性能 中图分类号:O 484.4 文献标识码:A Effect of annealing treatment... by air-annealing treatment were contrastively studied. The results show that Zr-doping promotes the orientation of (400) plane. With the increase of annealing temperature, the grain size increases......
treatment for large number of β-Mg17Al12 phase precipitated discontinuously at the grain boundaries notwithstanding the grains are fined a little. Key words: AE42 alloy; indentation creep; microstructure; creep resistance; heat treatment 因减轻汽车车身质量可减少汽车尾气排放,作为目前最轻的结构金属材料,镁合金越来越受到关注......
Effect of annealing treatment on cyclic-oxidation of electrodeposited Ni-Al nanocomposite ZHOU Yue-bo, ZHANG Hai-jun College of Materials Science and Engineering, Heilongjiang Institute... nanoparticles was annealed in vacuum at 500 °C for different time (3, 5 and 8 h, respectively). The results show that the annealing treatment leads to the reaction of Ni and Al to form intermetallics......
with a electric field intensity of 2 kV/cm. It is clear that during electric field treatment at 1 093 K, annealing twins appear and the number of twins increases with the increase of the holding time. Under..., annealing twins are formed in long-term aged GH4199 alloy due to the promoting effect on the movement of vacancies by electric field treatment, and such twins grow with the increase of holding time......
