Materials Literature
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this article at low alloy steel casting properties,low alloy steel casting process matters needing attention to strengthening smelting process,especially the casting process and heat treatment process control,cut is effective to improve quality of castings,the effective measures to reduce the production cost.
Low-temperature fuel cell is characteristic of its low ignition temperature and quick starting up capability;and catalyst is the key material for it.The reduction of the fuel cell cost,and thus the commercialization of the fuel cell crucially resort to the development of new catalyzed anode materials for the cell.The…
With hydrogen peroxide/urea activation and oxidation system,the padding and steaming pretreatment of polyester-cotton fabric in one-bath one-step was carried out.The effect of concentrations of hydrogen peroxide,urea and degreaser,time of steaming and pick-up on the desizing percentage,degradation rate of PVA in desiz…
Two complexes Zn(dmapa)(dbm)2(1) and Cd(dmapa)(dbm)2(2)(dmapa=3-dimenthylaminopropylamine,Hdbm =dibenzoylmethane) were synthesized and characterized by elemental analysis,IR,TGA and X-ray single crystal structure analysis.Complex 1 is of monoclinic,space group P21/n with a=1.142 0(2) nm,b=1.623 0(3) nm,c= 1.744 8(4) n…
The compressibility of basalt unidirectional fiber fabric in the compress process was studied by fiber compression model in this paper.It was found that the compress process of basalt unidirectional fiber fabric was conformed to Gutowski equation and was independent of the thickness of fiber lay-up.On this base,the eq…
The effects of the wheel hub part structure on the metallic deformation flow actions during die forging process were analyzed by using the methods of combining the finite element numerical simulation with the experimental study, and the metalic deformation flow rule during die forging process was revealed. The results…
The influences of adding 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP) alone and the effects of synergism of adding HEDP with magnetic field on the scale inhibition performance were investigated by the static and dynamic scale inhibition experiments,respectively. The calcium carbonate crystal samples of the scale…
The influences of additives [K4Fe(CN)6,2,2'-dipyridyl and L-arginine] on the depositing rate and stability of electroless copper bath and the corrosion re-sistance,conduction and adhesion of copper plating were investi-gated using electrochemical methods etc.Results show that 4% AgNO3 can be well used as the activatio…
Dual-laminated-core model,i.e.two laminated iron cores have the same joint type and are made of the same material but different length of limbs,is established for simulating the working conditions of power transformers.The exciting power at joints is separated in way of material homogenizing.The magnetic and loss char…
Five heterocyclic azo dyes(5-Br-PADAP,DMTAM,TADEB,DMTAA and 5-Me-BTAEB) doped polymer PMMA smooth thin films were made by spin-coating method on single-crystal silicon substrates and k9 glasses.The absorption spectra,reflection and transmission of the smooth thin films were measured by spectrophotometer.The refractive…
Recent research progress on carbon nanotubes [CNT] reinforced polymer composites was reviewed,with a focus on the preparation of carbon nanotubes / polymer composites,surface functional modifications,and mechanical properties of the composites.
The Mn-Zn ferrites were prepared by the oxide compound law.The sintered body microstructures were observed by the X-ray diffraction and scanning electronic microscope (SEM).In the formula Fe,Mn the Zn proportion to influence the ferrites outset magnetic conductivity,and volume density changing with the working conditi…
Cast iron components in particular carbon and silicon change directly affect the quality of anode assembly-and Fe-C roltage drop.Through the thermodynamic analysis,we find the reasons that the contents of carbon and silicon reduce at the same time during smelting,which there is residual electrolyte in the cast iron,an…
Using VMGSim software and adopting Physical Solvents thermo-dynamic model,basing on reaction mechanism derived with operational data,the NHD desulfurization system was simulated,and the simulation results were in good agreement with actual data.The optimization programs have been advanced,and the regeneration column a…
Based on development history of Electrodeposited Copper foil industry,combining with domestic and international development situation of copper foils,this paper tells the future direction of domestic copper foil.
The key points of foundry technology and quality control of important process for large iron casting with furan resin-bonded sand was presented in detail, based on its technological characteristic analysis. According to the production practice of several typical large-size iron castings, the principle of quality contr…
The electrochemical corrosion properties of welded joints of friction stir welding(FSW) were studied by measuring open potentials and polarization curves.The result shows that the corrosion resistance of welded joint is better than that of base material,because the microstructural refinement,homogenization and densifi…
The process control in producing the ML20MnTiB high strength cold-heading wire rod by the process route of BOF→LF→billet continuous caster→high speed wire rod mill is introduced and the modification process and mechanism of the boron bearing cold heading steel probed into and the relationship between the various micro…
The effect of Li2O doping on the sintering property and dielectric properties of CBS/Al2O3 glass ceramic were researched.Results showed that Li2O doping can improve the densification and dielectric properties of CBS/Al2O3 glass ceramic.With the mass fraction of w =0.5% of Li2O doping,CBS/Al2O3 can be sintered densely…
The heat treatment process of 3Cr2W8V steel roller was studied. The results show that 3Cr2W8V steel roller after carbonized, quenched and low tempered can satisfy the requirement of user.