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Effect of Heat Treatment on Microstructure of CuAlBi Alloy Chen Fang1,Zheng Yucai1,Liu Changrong1,Xiao Nianxin1,Zhang Hailong1 (1.Department of Machinery and Electron, Hebei Normal University..., and the effect of heat treatment on microstructure of CuAlBi alloy was also discussed. The results show that the phase-transition point temperature of CuAlBi alloy is 561.7℃, and heat treatment can......
was evaluated by tensile test, hardness test and conductivity measurement. The results show that for the alloys with retrogression and re-aging treatment (RRA), the conductivity increases... properties and microstructure observations, the optimal RRA regime is recommended to be 120 °C, 24 h + 180 °C, 30 min + 120 °C, 24 h. The strength level of the alloy after the optimum RRA treatment......
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State of the Art Treatment of Non-Ferrous Castings 3-in-1 Heat Treatment Systems Combine Foundry Processes Volker R.Knobloch1 (1.CEC- Consolidated Engineering Co., Inc., Kennesaw, Georgia, USA) 摘要... alloys. Combined technologies are available for semi-permanent mold castings with cores and castings made in Precision Sand Molds with organic binders. Castings are placed into the special heat treatment......
greater than that of the 7075-T6 alloy. Compared with T6 treatment, the RRA, T73, T6I6 and HTPP aging treatments cause the discontinuous distribution of the h precipitates at the grain boundary.... However, the strength of the 7??? series Al alloys with these over-aging treatments is decreased. The 7??? series Al alloys with retrogression and re-aging (RRA) treatment possess high strength and good......
] known as retrogression and reaging (RRA) was developed to enhance the SCC resistance of 7xxx alloys without considerable change in strength when compared to the T6 temper. The RRA treatment consists... alloy; stress corrosion cracking; heat treatment; microstructure; corrosive environment; thermo- mechanical treatment 1 Stress corrosion cracking Stress corrosion cracking (SCC) is degradation or crack......
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Laser Heat Treatment on Gear Surface and Its Practical Application DAI Zhong-sen1,SU Bao-rong1,MA Chun-yin1 (1.Guangzhou Photone Technology Co. LTD, P. R. China) 摘要:Making gears with hardened..., by study, experiment and practical use, that not only has the laser heat treatment solved the difficult problems in conventional technique, but also it has great superiority. The use cases proved......
Trans. Nonferrous Met. Soc. China 20(2010) s768-s773 Microstructural evolution of Mg9AlZnY alloy with vibration in lost foam casting during semi-solid isothermal heat treatment...) and the microstructure of Mg9AlZnY alloy was analyzed. On this basis, the morphology and size of a-Mg grains fabricated by semi-solid isothermal heat treatment(SSIT) at 530 ℃ and 570 ℃ holding different time were studied......
Method of surface treatment on sapphire substrate NIU Xin-huan(牛新环), LIU Yu-ling(刘玉岭), TAN Bai-mei(檀柏梅), HAN Li-ying(韩丽英), ZHANG Jian-xin(张建新) Institute of Microelectronic, Hebei University... is advantageous for epitaxial growth and device making-up. Key words: sapphire; substrate; surface treatment; chemical mechanical polishing; slurry 1 Introduction Sapphire (α-Al2O3) single crystal......
