Materials Literature
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With using 1： 3 water model test the study on flow field of molten steel in an 80 t tundish with different flow control structure for eight strand 150 mm x 150 mm billet casting at steel works has been carried out and is verified by numerical simulation method. Study results show that the improvement of flow effect of…
Zinc content in charging and output items for 1 080 m3No5 blast furnace at Ironmaking Plant, Jiyuan Steel has been analyzed, and combined with real production data of furnace the calculation on equilibrium distribution of zinc is carried out. Results show that zinc load of No5 blast furnace is 625 g/t, in furnace char…
The production flow sheet of steel S34MnV for marine crank is 100 t Consteel arc furnace-LF-VD + VC (vacuum casting) -ingot process. The observation and analysis on samples of defect region of steel S34MnV ingot are carried out by using scanning electron microscope and numerical simulation to get that the a large amou…
In order to study the solid-phase reduction process of CaW04and Si at low temperature during steelmaking process by direct alloying, the thermo-analysis experiments on CaWO4and Si powder mixture have been carried out by using differential thermal analyzer with constant heating rate 10 T/min, the reaction products and…
The 0. 14C-5Mn steel (/%: 0. 14C, 5. OMn, 0. 008P, 0. 002S, 0. 003 ON) is melted by a 50 kg vacuum induction furnace and roiled to 4 mm pate (finishing temperature 1 000 °C, air cooling). The structure and mediatic properties of 4 mm plate of 0. 14C-5Mn steel annealed at 550 ~ 650 °C for 6h are studied by scanning ele…
As adding 60 ~ 80 kg high alumina slag powder (/% : 45.40A1, 41.30A12O34.65SiO21.17C, 0.12P, 0.33S) and 971-1535 kg calcium based mixed desulphurizer [/% ：80.19CaO, 6.20CaF20.030(S + P)] in 120 t hot metal pot with 0. 030% ~0. 070% initial S content to carry out KR stirring desulphurizing pretreatment for 8 min, the e…
The 3 kinds of non-oriented silicon steel (/% : 0.004-0.006C, 1.31-1.38Si, 0.34-0.41Mn, 0.004S, 0.027P, 0.36-0.41Als, 0.0022-0.0028 T[O], 0.0048-0.0060N) - non containing Ca and B, containing Ca (0.0026% Ca) , and containing Ca-B (0.0027% Ca and 0.0045% B) is melted by a 6.5 kg vacuum induction furnace ,forged to 70 m…
The effect of final electromagnetic stirring (F-EMS) (160 A/4 Hz 〜280 A/8 Hz), temperature of liquid in tundish (1 500 〜1 542 ℃), casting speed (1.7 ~ 1. 9 m/min) and secondary cooling water ratio (0. 7 ~ 1. 1 L/kg) on center carbon segregation of 150 mm x 150 mm billet of 82B steel (/%: 0. 81C, 0. 76Mn, 0. 25Si, 0. 2…
The ultra-low-oxygen content and low rating of inclusions are key indexes for high quality bearing steel. The influence factors on control of ultra-low-oxygen content and nonmetallic inclusions in high quality bearing steel are analyzed including removal of slag during tapping, deoxidation with aluminium, high basicit…
The simulation test on process parameters for an 150 t ladle bottom argon blowing with geometric simularity ratio 1： 4. 5 water model has been carried out to study the effect of blowing nozzle circle (0. 40 ~0. 70 R) , angle of nozzle at same circle (60° ~ 120°) and flow rate ( 189 ~378 L/h) on mixing time, define the…
Based on published patented manufactured technologies for high strength pipeline steel including heavy plate, hot rolled coil and seamless tube at home and abroad in 2011. the key manufacturing technologies, structure and properties of pipeline steel with excellent anti-large-strain-deformation, low temperature toughn…
The Super304H austenite stainless steel (0. 10C-18Cr-9Ni-3Cu-0. 4Nb- 0. 08N) is one of first selected materials for superheater and reheater tubes of ultra-supercritical unit. As the steel has higher carbon content and its service temperature ( ~ 650 °C ) is the sensitizing temperature of M23C6precipitating along grai…
The possible equilibrium precipitated phases in a new Ni-25Cr-20Co nickel base superalloy (/% ： 0.03C, 25Cr, 20Co, 0.50Mo, 1.38Al, 1.38Ti, 1.50Nb, others Ni) are analyzed by software Thermo-Cale to get the equilibrium condition diagram of the superalloy and the effect of Al, Ti, Nb and Mo content ( respectively 0.5%-2…
As main inhibitor or auxiliary inhibitor for grain-oriented silicon steel, the particles of inhibitor bearing copper not only inhibit the primary crystal growing and promote the secondary recrystallization, but also decrease the heat temperature of casting slab. The main inhibitor for grain-oriented silicon steel is 1…
The numerical simulation on flow of cooling water in oxygen lance nozzle for a 50 t converter has been carried out by a commercial software Fluent to analyze its flow characteristics through velocity vector diagram of cooling water flow. By simulation and analysis, a new pattern oxygen lance nozzle with cooling water…
In order to evaluate whether the existing design of submerged nozzle is reasonable or not, the simulation test on liquid level fluctuation and impact depth of flow in 230 mm x (900 ~2 150) mm mold with casting speed 0. 8 ~ 1.7 m/min is earned out by using geometric similarity 1: 2 water model. Results show that for cu…
Based on the penetration theory, a kinetic model for oxygen transfer between molten slag and liquid steel (luring protective gas electroslag remelting process is established, and remelting test of die steel S136 (/% : 0.39C, 0.26Si, 0.43Mn, 0.020P, 0.018S, 13.37Cr, 0.21Mo, 0.34V) by a 50 kg electroslag remelting unit…
The origin of calcium treatment of molten steel in ladle and adding calcium method as well as developed gas rotary feeding wire lance and high-density cored-wire with elliptic section are presented in this article. It is suggested that using the experience of welded pipe forming machine the technical revamp of cored-w…
In accordance with inclusion defects occurred on cold rolled sheet of 430, 0C113R, 409 etc. ferrite stainless steels, the effect of basicity (1. 10 ~ 5. 98) of tundish covering flux on cleanliness of steel is studied, and the change of basicity, Al2O3and SiO2content in tundish covering flux with basicity R = 5. 98 dur…
The three dimensional thermo-mechanical coupling model of temperature field for medium and heavy plate during straightening process is established by finite element software ABAQUS. The temperature distribution and change of temperature of 20 mm plate with initial temperature 520 ℃ and 55 mm plate with initial tempera…