Materials Literature
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The dynamics of molecular liquids and polymers exhibit various “transitions”, associated with characteristic changes in properties. With decreasing temperature or increasing pressure, these transitions include (i) the onset of intermolecular cooperativity with consequent non-Arrhenius and non-Debye behavior; (ii) the…
Electrolytes are an important component in determining the performance and cycle life of ultracapacitors. Good electrolytes should have high ionic conductivity, large electrochemical windows, and excellent thermal and chemical stability. Ionic liquids are possibly ideal electrolytes to satisfy these requirements. In t…
The temperature dependences of the energy and structure of the symmetric tilt boundary of bcc and fcc iron were investigated by molecular dynamics simulation. A large energy cusp was observed at the bcc(112)‹110›Σ3 and fcc(111)‹110›Σ3 grain boundary plane, which is a twin boundary, whereas it was not observed at the b…
A novel SrNb(0.1)Co(0.9)O(3-delta) electrode material, which possesses not only high electrical conductivity but also large oxygen vacancy concentration at 400-600 degrees C, shows an excellent performance in the application of reduced temperature solid-oxide fuel cells.
The thermographic figure of 0. 45 C steel during fatigue testing has been measured by high frequency fatigue testing machine using infrared thennographic sensor. The change of surface temperature of test sample was recorded at three load conditions - Nol- load ratio r = - 1 ； loading frequency 137. 8Hz at 26. 2℃； No2-…
The softening behavior of 0.75C-0. 11V microalloy steel isothermal deforming at austenitic area 850～1000 ℃ within interval of passes has been studied by double-pass compression test using Thermecmastor-Z thermal simulation machine.Results indicated that with 30% deformation and 3 s-1deforming rate,as deformation tempe…
The effect of CaO-Al2O3based refining slag series on T[O] and[S] of Al direct deoxidation gear steel melted by 140 tLD have been studied and analyzed.Results showed that with controling Ca0/Al2O3=2.5 in ladleslag, TI0] decreasedt00.0013%;a CaF,in slag was5% and CaO/Al2O3was 2~3,the ability of slag to absorb oxide incl…
With increasing the strength and toughness of pipeline steel,the corresponding evolution of structure is pearlite-ferrite(X65 grade),acicular ferite(X80 grade),particle bainite-ferrite(X100 grade)and lower bainite(X120 grade).Grain refining and dispersed secondary phase are also important measures to increase the stre…
Ingredient and morphology of structure of inclusions in liquid alloy steel （0. 42C, 1. 14Cr, 0. 23Mo） under high basicity slag 43 -47CaO - 5 - 10SiO2- 46 -54A1203have been studied by silicon molybdenum electric resistance furnace with MgO crucible. It was obtained that after reaction with high basicity high A12O3slag…
The φ65,φ70 mm products of caterpillar track steel 35MnBM(0.35C,1.25Mn,0.0018B,0.029Al, 0.09V)was produced by 90 t electric arc fumace-LF(VD)refining -240 mm×240 mm billet concasting - continuous rolling process at Beiman Special Steel. With VD treatment and whole period shield casting practice the[N] was ≤78× 10-6,th…
Test steels were melted by a 25 kg vacuum induction furnace in argon protective atmosphere with charging of austenite heat resistant steel TP347H (0.07C,17.98Cr,10.78Ni,0.70Nb,0.0267N) for super critical pressure boil- er and adding 0~0. 16%B. Results showed that as added ≥0.02%B the austenite grain of test steel obvi…
Based on consumption of electric power, oxygen and carbon powder of Consteel arc furnace, the offset of measuring of metal weight system for Consteel arc furnace due to consumption of refractory of furnace is compensated by es tablished BP artificial neutral network model and Matlab simulation software calculation. Re…
Due to higher alloy content in steel,plenty of alloy element in oxide layer and complexity of oxide struc- ture,there are some trouble in pickling process for S31803 austenite-ferite duplex phase stainless steel(0.03C,22.05Cr, 5.23Ni,3. 10Mo,0. 16N).Iwas obtained by orhogonal test that with pickling solution H2SO4220g…
The effect of two-pass defonnation-first pass 60% , 20 s-1second pass 20% , 10 s-1at 850〜1 050 ℃ and different holding time (10 ~ 50 s) between passes on recrystallization of Nb microalloying low carbon bainitic steel (0. 21C, 1. 50Cr, 0. 20Mo, 0. 047Nb) and the interaction between thermal-deformed austenite recrystal…
The corosion resistance of 14 mm plate of steel 09CuPCrNi(0.09C,0.35Mn,0.09P,0.31Cu,0.45Cr, 0.31Ni)and ULCB steel(0.05C,1.61Mn,0.51Cu,0. 17Cr,0.26Ni)was measured by periodic dip corrosion test and the corrosion resistance mechanism was studied by polarizing microscope,X-ray difractometer and energy dispersive spec- tr…
Spring steel 60Si2Mn produced by 80 tLD-LF(VD)-CC flow sheet using aluminum killing during tap- ping and aluminum powder strong diffusion deoxidation after tapping to get total oxygen content(T.0)in billet of steel 10×10-6[S]0.005%,[P]0.010%。Analysis results showed that the main inclusion in steel at end phase of LF a…
The effect of main element-0.015～0.070C,1.21～2.30Si,0.25～0.33Mn,0.013～0.018P, 0.008~0.017S,0.002～0.210Al in low grade cold rolled non-oriented electrical steel on core loss has been studied by the process of 50 kg vacuum induction furnace steelmaking - 100 mm×25 mm slab forging -2 mm strip hot rolled by 350 four high…
Structure and texture orientation of 50W600 cold rolled non-orientation electrical steel(0.003～0.008C,0.3Si)during annealing at 700～760 ℃ for 3～360 s,water cooling have been studied by metallography and electron back-scattering spectrum difraction analysis.Results showed that incrensing annealing temperature the rate…
The radiant tubes of HP40 steel(0.35~0.45C,24~27Cr,34~37Ni,≤0.5Mo)cracked and failed af- ter serveed for 2 years and nine months at ≤980 ℃.The analysis results showed that the g phase precipitation which led to brittleness of materials was main cause for cracking of radiant tubes, the served temperature at cracking re…
The effect of converter bottom gas flow rate 0. 55 -0. 75 m3/h, distribution of bottom nozzle with 4 hole symmetry, 2 hole symmetry and 2 hole non- symmetry and blowing location d/D = 0. 1 - 0. 9 (d- diameter of concentric circles of located nozzle ； D- diameter of converter bath) on bath mixing time has been studied…