Materials Literature
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The weight of one crankshaft finished product of steel 42CrMoA (0.34～0.49C,0.9～1.2Cr,0.15~ 0.25Mo) for diesel engine is about 1 t, for which the weight of forging blank is 6.2 t, while the weight of electroslag remelting(ESR)casting - welding blank in only 1.5 t.The chemical composition of steel 42CrMoA ESR casting bl…
The first pass hot rolling process of compact strip production of 1 500 mm x 68 mm thin slab at Baotou Iron and Steel has been simulated by Marc commercial software with the aid of elastic-plastic thermal-mechanical coupled finite element method (FEM) . And the distribution and change of equivalent stress field, strai…
The thermodynamic equilibrium phases in T122 heat-resistant steel (0.11 ~ 0.12C, 11.37 ~ 11.97Cr, 1.90〜1.93W, 0.38Mo, 0.86 〜0.90Cu, 0.05Nb, 0.19- 0.20V, 0.58- 0.67N, 0.002 3 〜0.002 8B) and the effect of alloying element Cr, Al, Ti on S ferrite and major precipitated phases at temperature between 820 °C and 1 200 °C ha…
The structure evolution of a Nb-microalloyed extra-low carbon steel 0.03C- 1.05Mn-0.6Cr-0.08Nb during 1200 ℃ heating,then cooling to 850 ℃ and reducing 50%,holding at 850 ℃ for 20~1000 s fast cooling to 450 ℃,air cooling has been simulated and tested by Thermecmastor -Z thermal simulator. The test results showed that…
The 150 mm×150 mm billet of carbon and alloy constructional steel,high carbon steel and welding rod steel casts by R9 m 4 strand concaster at Shiheng Special Steel Works. Through optimized secondary cooling process modified 0.5~0.8 MPa water pressure,0.80~1.30 L/kg water ratio and 3 section manual water cooling proces…
The compression deformation test at temperature between 850 T and 1 000 X. with strain rate 0.1 * 10 1/s of steel BSOMnSi- 0.32C, 1.04Mn, 0.85Si, 0.019P, 0.009S has been carried out using Gleeble-1500 thermal simulation machine to study the dynamic recrystallization behavior of the steel. And the relation of peak stre…
In condition of commercial production at Maanshan Steel, with electric current parameter within limits 400 ~ 510 A and 2.0 ~ 2.5 Hz, the distribution characteristics of magnetic induction intensity in concasting mould with M-EMS for 8380 mm round bloom has been measured by using Gauss-meter. Hie results showed that th…
According to characteristics of the depth of metal and slag, the furnace structure and size, and the revamping design for an top-blown converter (charging metal 85 t) modified to a top and bottom combined blown converter, a cold simulation model for top and bottom combined converter has been designed and established t…
The precipitated phases in microalloy steel 40MnV-0.36~0.40C,1.36~1.40Mn,0.55～0.65Si,0.8 ~0.9V,0.011～0.016Ti,0.021～0.045Al,0.007～0.016N have been calculated by Thermocale and Dicta software, and the chemical compositions, morphology and distribution of the precipitated phases were studied by electrolytic analysis X- r…
The imported Consteel carbon-oxygen lance technology at Xining Special Steel has been improved by water model cold simulation test to determine the technical parameters -25 degrees slope angle of jet and angle included between lance at service position and a horizontal plane of furnace bottom to maintain 35～50 degrees…
The high strength free-cutting precipitation hardening stainless steel 2Cr16Ni3Mo2CuN has excellent cutting property in annealing conditions. The Brinell hardness(HB)number of steel 2Cr16N3Mo2CuN treated by first annealing at temperature between 710 ℃ and 800 ℃ and second annealing at temperature between 570 ℃ and 620…
A measuring device for melting and crystallization parameters of slag has been developed using single thermal couple which not only is as a measuring temperature element but also as a heating element with the characteristics of ℃ for crystallizing temperature also was ±10℃ and the error for crystallizing rate of slag…
The Φ8 mm~12 mm rod coil of 0. 19~0.24C,1.50~1.70Mn steel 20Mn2 was produced by an 80 t DC UHP EBT are furnace-ladle furnace(LF)- 150 mm×150 mm concasting- high speed rod rolling mill process at Hangzhou Steel. During LF refining,the soluble aluminium in steel was controlled between 0.020% and 0.025% with feeding Sili…
The test and study on dephosphorization of 0.12～0.40C,10.06～18.89Cr,0.60～11.00Ni molten stainless steel at refining temperature between 1853 K and 1893 K has been carried out in a 5 kg medium frequency induction furnace with MgO crucible by using 45~65BaO,35～55BaF₂,3~7 Cr₂O₃ slag series. The test results showed that t…
The melting point and viscosity of refining fluxes for desulphuration have been studied of which CaO (balance)-SiO2(22.4%)-Al2O2(11.6%)-CaF2(10%) refining slag was as basic flux, when the ratio of (CaO+RxO)/SiO2was fixed at 2.5(where RxO- BaO or Li2O), the BaO or Li2O added and replaced equivalent CaO content in flux.…
As both C and N content in steel are no more than 30×10-6 and the steel is turned into interstitial atom free status by added micro Ti(excess Ti 0.02%~0.04%) or Ti-Nb (excess Nb ＜0.02%) alloying to compound residual C and N in steel,the interstitial atom free(IF)sheet steel has excellent deep drawing properties and no…
The effect of micro Zr on structure and mechanical properties of welding coarse grain heat affected zone (CGHAZ)of ≤0.18C-1.2～1.6Mn HSLA steel has been studied by welding thermal simulation method. The test results showed that with 30~ 100 kJ/cm heat input welding thermal simulation,the strength,plasticity and impact…
The fluid field in mould for slab concasting has been simulated using K-e double equation model i.e. the turbulent flow pulse kinetic energy k equation and the turbulent flow pulse kinetic scattering loss rate e equation in given numerical calculation conditions by three dimensional mathematical software Fluent. The b…
The effect of hydrogen impurities on the electronic and magnetic properties of ZnO-based diluted magnetic semiconductors is examined through first-principles pseudopotential calculations. We suggest that interstitial H can mediate a strong short-ranged ferromagnetic spin-spin interaction between neighboring magnetic i…
We determine the range of thicknesses and refractive indices for which omnidirectional reflection from quasiperiodic multilayers occurs. By resorting to the notion of area under the transmittance curve, we assess in a systematic way the performance of the different quasiperiodic Fibonacci multilayers.