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EFFECT OF HOT DEFORMATION PARAMETERS ON RECRYSTALLIZATION OF STEEL T91 被引量:2
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作者 F. X. Zhu c. liu G. Z. chui and D. F. Gao (State Key Lab. of Rolling and Autoation, Northeastem University, Shenyang 110006, china) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第1期335-341,共7页
In this paper, the recrystallization behavior of steel 9Gr- 1Mo - V-Wb - N at high temperature was studied using Gleeble - 1500 thermalmechanical simulator.The critical conditions of occurrence of dy- namic recrys... In this paper, the recrystallization behavior of steel 9Gr- 1Mo - V-Wb - N at high temperature was studied using Gleeble - 1500 thermalmechanical simulator.The critical conditions of occurrence of dy- namic recrystallization during hot deformation were obtained,and by means of double hit testing with an inter -hit time, the metabynamic recrystallization between rolling passes and its effect factors were also imitated.Additionally,the deformation activation energy of T91 steel,the relationship between critical stress,strain, temperature, and strain rate were regressed respectively, the results were sati- sfied. 展开更多
关键词 ferritic stainless steel RECOVERY RECRYSTALLIZATION
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Pilot-plant Study of Anoxic-aerobic Membrane Bioreactor (AO-MBR) on the Changes of Membrane Flux under Constant Pressure
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作者 Z.Q. liu c.P. Wang +1 位作者 J.Y. Wang c. liu 《Journal of Environmental Science and Engineering》 2010年第3期13-20,共8页
Under a constant pressure, a pilot-plant test was conducted through the use of anoxic-aerobic membrane bioreactor (AO-MBR), and this test operated steadily for 251 days. During the experiment, there were a total of ... Under a constant pressure, a pilot-plant test was conducted through the use of anoxic-aerobic membrane bioreactor (AO-MBR), and this test operated steadily for 251 days. During the experiment, there were a total of four membrane cleaning processes, for the 90th day, the 150th day, the 210th day and the 240th day, respectively (The cleaning cycle was 90 days, 60 days, 60 days and 30 days, respectively). From the initial 33.26 L/m^2.b dropped to 20.03 L/m^2.h after the fourth membrane cleaning, membrane flux reduced to 60.22% of the initial flux. During the 180 thd-210 thd of the experiment, the powdered activated carbon (PAC), the segment size of which is 80-100, was put into anoxic reactor. Membrane flux decreased from 16.02 L/m^2·h to 15.29 L/m^2·h, and then rose to 15.65L/m^2·h. The dosing of PAC had a significant effect on the maintenance of a high membrane flux and extending running time. Before several membrane cleanings, a wire of membrane was intercepted from membrane module. It was found that the membrane surface sediments seemed to the inorganic colloid formed by Fe^2+, Ca^2+ and biofilm formed by some micro-organisms after the membrane surface pollutants were analyzed preliminarily with scanning electron microscopy (SEM). 展开更多
关键词 Anoxic-aerobic membrane bioreactor (AO-MBR) constant pressure membrane fouling membrane flux membrane cleaning cycle.
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