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; 1 INTRODUCTION High pressure gas atomization(HPGA), with high property and efficiency, is the leading method of producing fine spherical... to the "boundary layer" of gas flow structures. The close-coupled high-pressure gas atomization flow structures in gas-only condition is shown in Fig.4. There is a recirculation zone like a reverse cone......
-yun, CHEN Xin, YU Wen-tao, ZHANG Xin. Filming mechanism of high-pressure gas atomization in state of ‘opened’ wake [J]. The Chinese Journal of Nonferrous Metals, 2005, 15(7): 1000-1005. (in Chinese...]. The main feature of CCGA is that there exists a unique gas recirculation zone below the nozzle, where interactions between melt and high pressure gas become so complex that it has not been understood......
, the secondary dendrite arm spacing (SDAS) decreases and the cooling rate increases. The particles processed under high gas atomization pressure (1.6 MPa) exhibit a lower SDAS value and a higher cooling rate...Effect of closed-couple gas atomization pressure on the performances of Al-20Sn-1Cu powdersZHAO Xinming, XU Jun, ZHU Xuexin, and ZHANG Shaoming National Engineering and Technological Research Center......
Simulation of mold filling and prediction of gas entrapment on practical high pressure die castings ZHAO Hai-dong(赵海东), BAI Yan-fei(白砚飞), OUYANG Xiao-xian(欧阳晓贤), DONG Pu-yun(董普云) State..., a method for gas entrapment was established by tracking flow of entrapped gas. The model and method were applied to practical ADC1 high pressure die castings. The gas entrapment prediction was compared......
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Simulation and experimental study of high pressure switching expansion reduction considering real gas effectLUO Yu-xi(罗语溪)1, ZHANG Yan-jun(张彦军)1,2, GAO Yu-bao(高玉宝)1, WANG Xuan-yin(王宣银)3, XU Zhi-peng... of SER and the validity of the mathematic model and the compensation method.Key words:high pressure pneumatics; pressure reduction; dynamic simulation model; real gas effect......
. The key concept of hybrid atomization is to control the liquid film formation on disk for fine powder production. Low-pressure gas atomization was utilized to promote the formation of a very thin... atomization was invented and developed recently to produce very fine spherical powders economically[3-4]. This technology combines low-pressure gas atomization with centrifugal atomization effectively. Its......
NUMERICAL SIMULATION OF ATOMIZATION GAS FIELDS IN VARIOUS ATOMIZING PROCESSES Q.C.Li1,C.S.Cui1,J.Shen1,J.F.Sun1,F.Y.Cao1 (1.National Key Laboratory of Precision Hot Processing of Metals, Harbin... the effects of key atomizingvariables such as gas pressure and protrusion length of delivery tube on the gas flowstate at the tip of or inside the delivery tube. Increasing the length of delivery tube toa......
is obtained, which is satellite-free and high sphericity. When the superheat is 20?30 ℃, with the gas atomization pressure increasing from 0.7 MPa to 2.5?3.0 MPa, the powder size decreases from 40.10 ?m..., Central South University, Changsha 410083, China) Abstract:SnAgCu lead-free solder powders were prepared by close-coupled gas atomization. The effects of gas atomization pressure and melt superheat......
-phase atomization than those produced by the conventional gas atomization technology under the same gas pressure and flowing rate. The stainless steel powder becomes finer and the size distribution... fabricated by high pressure water atomization[J]. Advanced Materials Industry, 2003, 4(1): 33- 35. [7] 陈振华, 陈 刚, 康智涛, 等. 液体金属与合金的固体雾化方法[P]. 中国: ZL01106868.X, 2001, 1. CHEN Zhen-hua, CHEN Gang, KANG Zhi-tao......
