Materials Literature
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Abstract The interest in poly(L‐lactic acid)(PLLA) has been increasing in recent years because this polymer is made from renewable resources and its properties are benign to the environment. Carbon nanotubes(CNTs) have shown exceptional stiffness and strength and remarkable thermal and electrical properties, which mak…
This paper presents a new, simple and low cost method to reduce inrush currents caused by transformer energization. The method uses a grounding resistor connected at a transformer neutral point. By energizing each phase of the transformer in sequence, the neutral resistor behaves as a series-inserted resistor and ther…
A novel point-arc microwave plasma chemical vapor deposition (CVD) apparatus was employed to grow single-walled carbon nanotubes (SWNTs) on Si substrates coated with a sandwich-like nano-layer structure of 0.7 nm Al 2 O 3 (top)/0.5 nm Fe/5–70 nm Al 2 O 3 by conventional high frequency sputtering. The growth of extreme…
Ferromagnetic nanowires are shown to perform both high yield and high purity single-step cell separations on cultures of NIH-3T3 mouse fibroblast cells. The nanowires are made by electrochemical deposition in nanoporous templates, permitting detailed control of their chemical and physical properties. When added to fib…
Various examples of composite titania-based nanostructured materials exhibiting cooperative functionalities between different active components are presented. The fabrication of these integrated composite materials is based on one-pot supramolecular templating techniques combined with acidic sol-gel chemistry. The def…
The φ110 mm bar products of steel 3Cr2W8V were forged from 740 kg ingot melted by 15 t EAF and re- fined by 25 t LF. At end of refining period,the oxygen content in steel was 29×10-6and the liquid steel was treated by rare earth treatment with adding 0.048% RE alloy(21~24RE,44Si,3Mn,5Ca,3Ti,bal Fe). The yield of rare…
It is available for Consarc ESR furnace through control of swing voltage to keep the distance between electrode and slag surface unchanged,in order to keep the shape of remelting pool unchanged during remelting and get high quality ESR ingot. Based on analysis of voltage swing control principle for Consarc ESR furnace…
The tube bloom steel J55-0.32～0.38C,1.25～1.55Mn is produced by 92 t EBT are fumace-92 t ladle furnace(LF)at Chengdu lron and Steel,Pangang Group. With controlling [C]≥0. 10%,[P] ≤ 0.015 at arc furace tap- ping,adding silicon- aluminium- barium deoxidant 200 kg/heat at EBT tapping a quarter of metal to decrease the oxy…
The φ11~13 mm SWRH82B steel coil(0.79~0.83C,0.70～0.80Mn,0. 17~0.22Cr,≤0.020S,≤0.025P) for prestressed steel wire and stranded wire has been successfully developed by hot metal pretreatment - 80 t top and bottom combined blown converter - 150 mm×150 mm billet concasting-high speed wire-rod mill process at Xiangtan Stee…
Hie stress-strain curves of 0.006 7C-0.045 0Ti Ti-IF (interstitial free) steel with deformation temperature 750 - 900 °C and deformation rate 0.1 - 40-1has been tested and obtained Ihennecmaster-Z thermal simulation test machine, based on that the relational expression between Zener-Holloman parameter Z and deformatio…
Using similitude principle and hydrokinetics theory, the water simulation and mathematic simulation of molten steel flow condition in ladle furnace (upper and bottom diameter- 2 310 mm and 1 984 mm, height of ladle furnace- 2 620 mm, porous block diameter- 104 mm) have been carried out by conductivity testing and Phoe…
The superplastic duplex austenitic-ferritic stainless steel-0.021C,24. 16Cr,7.21Ni,2.87Mo,0. 17N, 0.48Cu has been developed by arc furnace + electroslag remelting process. The test results showed that the pitting erosion resistance and the crevice corosion resistance of superplastic duplex stainless steel 00Cr25Ni7Mo3…
As the high manganese steel is treated by "top step process” in steelmaking furnace and in ladle using Vslag+ Ti + Zn compound inoculation agent, the inoculation effect to control and improve precipitated amount and morphology of carbide, clean grain boundary and fine grain shall be got. Hie dynamics effects of compou…
The effect of technology parameters such as initial rolling temperature, deformed speed, draft distribution and Interpass time on grain size has been simulated analyzed and calculated using established the simulation system for grain size of hot rolled plate and strip of microalloying steel. And based on this, a Back…
The effect of strain temperature and strain rate on critical deformation and dynamic recrystallization during single pass deformation at strain temperature between 1000 ℃ and 1100 ℃ and strain rate 1~10 s-1and the effect of strain temperature and inter-pass time on static recrystallization at temperature between 950 ℃…
The effect of surface phase constitution, surface roughness, sliding speed, press force and anti- rust oil on friction coefficient of galvannealed IF sheet steel has been tested and researched. It was found that while there were a lot of columnar S phase in surface for the sheet steel, the friction coefficient usually…
The structure of TRIP(transfornation induced plasticity)steel 0.20C- 1.08Si- 1.43Mn during continuous cooling has been studied by Gleeble- 1500 thermal simulation machine to get CCT( continuous cooling transforation)curves and to obtain that the bainite particle occured with cooling rate 10 ℃/s and the lath bainite go…
There were obvious mixed grain structure in X60 pipeline steel(0.04～0.06C,1.24～1.30Mn,0.04~0.05Nb,0.006～0.008Ti,0.015～0.030V)produced by 6 pass CSP(compact strip production)rolling. The mixed grain structure was climinated and the grain sizes in steel were 5.6~8.0 pm by no V added,modifed the composition-0.06~0.08C,1.…
The 230mm×230 mm×1350 mm LZ50 steel billet for vehicle axle is produced by quality hot metal pretreatmnent - 120 t converter melting and SiAlBaSrCa combined deoxidiing- ladle refiring with Si-Ca powder injection + RH- TB vacuum degassing- 5 t ingot casting - rolling process. The production results showed that due to c…
Based on research of main composition alloying principle for hot working die steel,the studied new precision casting hot working die steel was melted by a 250 kg medium frequency induction furnace and the wearing test on test steels at 400 ℃ was carried by MG2000 high temperature friction-wear testing machine. The res…