Materials Literature
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The section size of casting bloom to roll 60 kg/m heavy rail of steel U75V (%: 0.71 ~ 0. 80C, 0. 50 - 0. 80Si, 0. 70 ~ L 05Mn, 0.04 -0.12V, 0. 23Cu) is 380 mm x280 mm and the section area of rolled piece out of second stand rougher mill is 18 015 mm2. A finite element model is established by rolling deformation test a…
Based on works rolling process of 4300 mm medium-heavy plate of low carbon steel Q235 (C ≤0. 20% ) the elastic-plastic finite element model is established by using the finite element software ABAQUS/Explicit to simulate and calculate the general rolling process and MAS (Mizushima automatic plan view pattern control sy…
The behavior of austenite grain growth of Nb-bearing spring steel 60Si2MnNb (%: 0. 57C, 1. 60Si, 0. 76Mn, 0. 34Cr, 0. 022Nb) during heating at 950 ~ 1 250℃. in vacuum has been observed by using high temperature microscope, and the curve of coarsening process is fitted by Arrhenius equation to get the austenite grain g…
The statistics and analysis on temperature condition of IF steel liquid in current 210 t top and bottom combined blown converter-RH-slab casting process condition at Qian An Iron and Steel Co have been carried out, and the math model for change of liquid temperature during RH treatment process is established in accord…
Competitive oxidation of Al and Ti and the modification of inclusions in steel have been studied by aluminium deoxidation and calcium treatment test of 0. 007% -0. 015%C- 15.96% ~ 16. 94% Cr- 0. 08% ~0. 36%Ti- 0. 015% ~ 0.124% Al ferrite stainless steel liquid in a 500 kg vacuum induction furnace and relative thermady…
The continuous extrusion cladding technology is a new plastic making process developed based on continuous extrusion technology, of which the billet piece is dragged in by extrusion wheel at effect of friction force, turned with wheel and deformed, extruded in mould to clad the steel core in mould cavity and get cladd…
The process flow sheet to melt microalloying pipeline steel X80 is 300 t top and bottom combined blowing converter-ladle argon blowing and microalloying-LF-RH. With converter gas-dynamic slag stopper to control tapping slag a- mount ≤4 kg/t； ladle top and bottom blowing argon blowing for 6 min with aluminium bullet sh…
In order to increase the converter production capability, with optimization of converter oxygen supply schedule- oxygen lance level and charging mode, basic lime and dolomite amount according to different Si content in metal and bottom blowing process, and control tapping temperature, the converter end point first per…
The effect of 300 t converter-RH refining calcium treatment on inclusions in non-oriented silicon steel sheet (%： ≤0.005C, 1. 2 ~2. 2Si, 0. 2 ~0. 6Mn, ≤0. 20P, ≤0. 005S, 0. 2 ~0. 6 Al, 0 ~0. OlCa) has been studied by electrolysis and scanning electron microscope. Results show that with 0. 25% and 0. 35% Al content in…
The present paper deals with mathematical models of heat and moisture transport in layered building envelopes. The study of such processes generates a system of two doubly nonlinear evolution partial differential equations with appropriate initial and boundary conditions. The existence of the strong solution in two di…
Effect of ambient gases present in air on photoluminescence (PL) and electrical conductivity of films prepared using ZnO nanoparticles (NPs) have been investigated. It is observed that NPs of size below 20 nm kept inside a chamber exhibit complete reduction in their visible PL when oxygen partial pressure of the surro…
Recent advances in scanning tunneling spectroscopy performed on heavy-fermion metals provide a window onto local electronic properties of composite heavy-electron quasiparticles. Here we theoretically investigate the energy and temperature evolution of single-particle spectra and their quasiparticle interference cause…
A femtosecond laser-irradiated crystallizing technique is tried to convert amorphous Sb2Te3 film into crystalline film. Sensitive coherent phonon spectroscopy (CPS) is used to monitor the crystallization of amorphous Sb2Te3 film at the original irradiation site. The CPS reveals that the vibration strength of two phono…
Magneto-electric multiferroics exemplified by TbMnO(3) possess both magnetic and ferroelectric long-range order. The magnetic order is mostly understood, whereas the nature of the ferroelectricity has remained more elusive. Competing models proposed to explain the ferroelectricity are associated respectively with char…
Application of biomaterials in combination with stem cells is a novel tissue engineering approach to regenerate cartilage. The objective of this study was to investigate the potential of poly(vinyl alcohol)/polycaprolactone (PVA/PCL) nanofiber scaffolds seeded with rabbit bone marrow-mesenchymal stem cell (BM-MSC) for…
Using a combination of high-angle annular dark-field scanning transmission electron microscopy and atomically resolved electron energy-loss spectroscopy in an aberration-corrected transmission electron microscope we demonstrate the possibility of 2D atom by atom valence mapping in the mixed valence compound Mn3O4. The…
BACKGROUND: Silica nanoparticles have been discovered to exert cytotoxicity and induce apoptosis in normal human cells. However, until now, few studies have investigated the cytotoxicity of silica nanoparticles in tumor cells. METHODS: This study investigated the cytotoxicity of 7-50 nm silica nanoparticles in human H…
BACKGROUND AND METHODS: In this study, gelatin was blended with polyglycolic acid (PGA) at different ratios (0, 10, 30, and 50 wt%) and electrospun. The morphology and structure of the scaffolds were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and differential scanning calor…
We report on infrared (IR) absorption and dc electrical measurements of thin films of poly(3-hexylthiophene) (P3HT) that have been modified by a fluoroalkyl trichlorosilane (FTS). Spectra for FTS-treated films were compared to data for electrostatically-doped P3HT in an organic field-effect transistor (OFET). The appe…
Ferroelectric domain nucleation and growth in multiferroic BiFeO3 films is observed directly by applying a local electric field with a conductive tip inside a scanning transmission electron microscope. The nucleation and growth of a ferroelastic domain and its interaction with pre-existing 71° domain walls are observe…