Materials Literature
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Recent research suggests that today's condoms are only 85% effective in preventing human immunodeficiency virus (HIV) and other sexually transmitted diseases. In response, there has been a push to develop more effective ways of decreasing the spread of the disease. The new nanotechnology-based condom holds the promise…
The consequences of dynamical screening of Coulomb interaction among correlated electrons in realistic materials have not been widely considered before. In this letter we try to incorporate a frequency dependent Coulomb interaction into the state-of-the-art ab initio electronic structure computing framework of local d…
Dielectric spectroscopy of CaCu3Ti4O12 was performed spanning broad ranges of temperature (10–300 K) and frequency (0.5 Hz–2 MHz). We attribute the permittivity step-fall to the evolution of Kirkwood-Fröehlich dipole-correlations, reducing the moment-density due to anti-parallel orienting dipoles, with decreasing temp…
Nanoparticles may soon be used to transport diagnostic and therapeutic drugs to targeted sites not normally accessible, thereby improving treatment and reducing costs. Further research is still needed to establish the efficacy and safety of these nanomaterials.
The recrystallization structure and textures of an IF steel (/% : 0. 005C, 0. 02Si, 0. 16Mn, 0. 011P, 0. 004S, 0. 042Als, 0. 061 Ti, 0. 003 1N) 0. 8 mm cold-rolled sheet during annealing at 500 ~800 ℃ are studied and the forming mechanism of ｛111｝ recrystallization textures and evolution law of structure of IF steel d…
0. 153Ti-0. 038Nb and 0. 080Ti-0. 062Nb two kind of Ti-Nb microalloying low carbon steel (/% : 0. 061 ~ 0. 075C, 0. 22Si, 1.76 〜1.77Mn, 0. 002 〜0. 003S, 0. 006P, 0.003Als, 0.003 8 ~0. 004 2N, 0.004 0 ~0. 004 50) are melted by a 50 kg vacuum induction furnace and rolled to 10 mm plate with finishing rolling at 880 ℃ ,…
The phase transformation and structure of rough rolled slab (36 mm x 1 500 mm) of steel WL510 (/% : 0. 090C, 0. 13Si, 1.45Mn, 0. 005S, 0. 019P, 0. 040Al, 0. 020Ti, 0. 030Nb) during continuous cooling with 1 〜36 ℃/s have been studied by a Thermecmastor-Z thermal mechanical simulator, and the continuous cooling transfor…
Based on the analysis results of study on performance of high Al2O3(20% ) slag in lab, results show that it is available to improve the flowability of slag, increase permeability index and improve stability of blast furnace ( BF) by controlling basicity of binary slag 1. 15 ~ 1. 20, basicity of quarternary slag 0. 95…
RH vacuum degas process test on 45 heats Q345E, Q345GJC and BQ550D etc. steel grades has been carried out by 210 t top and bottom combined blown converter-LF-RH-wide heavy slab CC flow sheet, and the effect of RH vacuum treatment on liquid dehydrogenation, deoxidization and denitriding is studied. It is obtained that…
The oxidation resistance of a new high silicon austenite heat resistant stainless steel TD305B (/% : 0. 05C, 3. 30Si, 0. 80Mn, 19. 50Cr, 13. 30Ni, 0. 05N) and a traditional heat resistant stainless steel SUS310S (/% : 0. 05C, 0. 60Si, 0. 80Mn, 24. 60Cr, 19. lONi, 0. 05N) at 500 〜1 000 ℃ air atmosphere has been studied…
As the quenched crawler belt manufactured by steel 40SiMn2, 35MnTiB and 30MnTiB ( C≥030% ) easily occurs micro-cracks that doesn' t meet the requirement of anti-fracture behavior, while the hardenability HRC J1.542. 5 〜 49. 0 and J13.017. 5 ~ 37. 0 of produced steel 23MnB (/% : 0.20 - 0. 27C, 0. 80 〜1. 10Mn, ≤0. 20Cr,…
The production process flow sheet of steel AH36 for ship is 120 t BOF-LF-220/250 mm slab casting-2250 mm mill rolling. The analysis and comparison on mechanical properties o£ the 10 ~ 24 mm opened plate of AH36 steel for ship (/% ： 0. 07C, 0. 26Si, 1. 24Mn, 0. 014P, 0.006S, 0.031 Als, 0. 028Nb, ≤0. 290Ceq) produced by…
Electroslag surfacing with liquid metal ( ESS LM) technology is a new process to be based on current-con- ducting mould with special structure and use liquid metal pouring into the mould to carry out electroslag surfacing clad and get composite roll. The current status and development trend of domestic roll manufactur…
Combined with relative parameters of a 100 t vacuum refining furnace with single snorkel at steel works, the imitated calculation for liquid field in degassing of vacuum refining furnace with single snorkel has been carried out by numerical simulation method to analyze the basic characteristics of liquid flow in furna…
The work principle and technology characteristics of developed technology of vibration-excited nucleation in liquid and the treated effect on ingot of metal zinc ingot and 1Cr17 ferrite stainless steel ingot in lab are presented. And the commercial pilot production for application of developed device using the technol…
The effect of vacuum, temperature and nitride composition on nitrogen solubility in steel is analyzed and the test of adding nitrogen in alloy steel with various chemical composition (/% ： 0. 06 ~0. 36C, ≤3. 23Si, ≤2. 20Al, ≤ 9. 00Cr) by three kinds of nitrides-silicon nitride, manganese nitride and chromium nitride i…
A model of fluidized bed gas-solid reaction with simultaneous considering fluid, mass-transfer and chemical reaction of gas-solid two phases is established by using CFD fluent software and based on Eulerian multiphase fluid model. The coupling between gas-solid fluid, heat transfer, mass transfer and chemical reaction…
The dynamic recrystallization of steel 321 (/% : 0. 028C, 0. 69Si, 1. 21Mn, 0. 030P, 0. 001S, 17. 33Cr, 9. 19Ni, 0. 31Ti) has been studied by single pass hot compression with 0. 01 ~ 1 s-1at 900 ~ 1 200 ℃ oh a Gleeble-1500 thermal simulation machine. Results show that with higher deformation temperature and lower stra…
Test alloy Ni30Cr20 (/% : 0.035 〜0.045C, 0.28 ~0. 30Si, 0. 73 〜0. 75Mn, 0. 005 ~0. 007P, 0. 001 ~ 0. 002S, 19.40~ 19. 93Cr, 29. 75 ~30.35Ni, 0. 30 〜0. 36A1, 0. 03 〜0. 88Ti, 0.005 7 ~0,0205N) is melted by 150kg vacuum induction furnace to cast ingot with size (mm) 120 x230 x500. The calculation on thermodynamics condit…
The test H beam steel (/% : 0. 11C, 0. 25Si, 1.50Mn, 0. 006S, 0. 012P, 0. 038Nb) is melted by a 30 kg vacuum induction furnace and rolled to 15 mm plate. The continuous cooling transformation (CCT) curves of H-section steel 0. 11 C-0. 25Si，1. 50Mn-0. 038Nb are plotted by thermal dilatation curves at cooling rate 0. 1…