Materials Literature
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In recent decades, advanced high strength steel (AHSS) for car is focal point of research and development work for materials. Strength -elongation product of 1st generation AHSS steel with ferrite matrix is 15 GPa • % , and the strength -elongation product of 2nd generation AHSS steel with austenite matrix is 50 GPa ,…
The effect of argon blowing rate (150 ~450 IVmin) and argon blowing location at ladle bottom (ladle center to 3/4 radius of submerged snorkel) on average flow rate at metal-slag interface in 130 t single snorkel furnace with desulphurizing top slag is simulated by Fluent software and VOF model. Results show that the s…
Type, morphology and ingredient of inclusions in stainless steel 304 (/%: 0. 03 ~0. 04C, 0. 39 ~0. 41 Si, L20~1.23Mn, 0. 014 ~0. 016P, 0.001 ~0.002S, 7.95 〜8.00Ni, 18. 06 ~ 18. 20Cr, 0.003 ~ 0. 004Al, 0 〜0.002Ti) during 110 t AOD-LF-tundish-160 mm slab casting-hot rolling strip coil process have been studied by SEM, e…
With using 120 t top and bottom combined blown converter-LF refining-VD-Φ150 ~ Φ200 mm round billet casting flow sheet, the development and production for casting round billet of J55 (37Mn5) , L80 ( TC80, 0.24% ~ 0. 28%C, 1.40% ~ 1. 55Mn) , N80 (36Mn2V) and Pl 10 (26CrMn4) grade oil case steel have been completed at T…
The tested austenitic stainless steel 304JI (/%:≤0. 08C, ≤1.70Si, ≤3.OOMn, 15 〜18Cr, 6 〜9Ni, 1 〜3Cu) is melted by a 10 kg vacuum induction furnace, forged to Φ40 mm bar and solid-solution heat-treated at 1 080 °C for 10 min, water cooling. The effect of 0. 05% 〜2. 52% Cu on mechanical properties of test steel (/%: 0.…
The rule of flowing of converter slag particles (/% : 40~60CaO, 10 ~20SiO21 ~5Al2O37 ~ 10FeO, 5 〜10Fe2O35 ~ 15MgO, 2 ~6MnO，1 ~5P2O50~10f-CaO) in rotary container (cylinder reactor) with rotating angular velocity 0. 3 ~ 2. 0 r/s is simulated by software Fluent to analyze the characteristics of flowing of slag particles…
The effect of ingredient and basicity ( 1.0 ~ 1.2 ) of (/% :) 38. 5 ~ 45. 8CaO-38. 2 〜42. 0SiO2-8 ~ 15 Al2O3-8MgO refining slag series on morphology of inclusions in spring steel 55SiCrA (/% : 0. 53C, 1. 50Si, 0. 70Mn, 0. 69Cr, 0. 008P, 0. 003S, 0. 005 Als) has been studied silicon-molybdenum tube furnace with Al2O3cr…
The manual welding on 7 mm plate of ultra-fine-grained steel SS400 (/% : 0.18C, 0.04Si, 0.43Mn, 0.022Al, 0.002Ca) has been carried out by using J442 (/% : ≤0.12C, 0.3-0.6Mn) , J506 (/% :≤0.12C, 1.6Mn) and J507 (/% : ≤0.12C, ≤1.25Mn) welding rod with heat input 6-14 kJ/cm, and the structure and microhardness of welded…
The 150t ladle furnace (LF) refining main steels are beam steels for car and wheel steels etc, with production flow sheet 150 t converter-150 t LF-slab casting-continuous rolling. With decreasing the 150t LF average initial slag basicity form 3. 4 to 2. 1 and increasing the Ca wire average feeding rate from 4. 0 m/s t…
The production flow sheet for test steel is 2 t medium frequency induction furnace-200 kg ESR (Φ180 mm) -annealing-upset forging to Φ325 mm-spheroidal annealing-quenching at 1050 ℃-tempering at 590 ℃，furnace cooling. The effect of 0 - 0.001 0% Mg on structure and mechanical properties of hot-working-die steel H13 (/%…
Based on theoretical analysis on dephosphorization in steelmaking process, the off-gas analysis is used to control steel melting process and end-point temperature of molten steel, control slag melting process, forecast end-point phosphorus content in steel and get low phosphorus molten steel. For 100 t top and bottom…
Steelmaking flow sheet for GCrl5 bearing steel is 80 t top and bottom combined blowing converter-LF refi- ning-VD-180 mm x 220 mm CC process. The effect of CaO-SiO2-Al203-CaF2-MgO refining slag series with basicity 3 ~ 8 on metallurgy quality of high quality GCrl5 bearing steel (/% ： 0. 95 ~ 1. 05C, 0. 15 ~0. 35Si, 0.…
The steelmaking process for test hot working die steel H13 (/% : 0.36-0.38C, 0.36-0.38Mn, 0.89-0.91Si, 0.007-0.010P, 0.006-0.011S, 5.10-5.15Cr, 1.12-1.18Mo, 0.84-0.89V) is 40 t eccentric bottom tapping arc furnace-ladle furnace refining-VD treatment-4. 65 t ingot casting process. With analysis on total oxygen and nitr…
The numerical simulation of flow field and temperature field in casting mold for wide slab at Ma' anshan Steel has been carried out by established a three-dimensional model using Fluent software, and the effect of immersion depth of nozzle (150 ~ 190 mm), angle of side hole of nozzle (- 10° ~ - 16°), ratio of cross-se…
The test steel 42CrMoTiB and RE microalloying steels 42CrMoTiBRE (/% : 0.41 -0.43C, 0. 36 ~0. 38Si, 0.59~0.72Mn, 0.018 ~ 0.020P, 0.005 ~0.010S, 1.08-1. 13Cr, 0. 16~0. 19Mo, 0. 06 ~ 0.08Ti, 0. 003 ~ 0.004B, 0~ 0. 020Ce or Sm, 0.001 3 ~0.001 5 T [O]) are melted by an 150 kg vacuum induction furnace, casting average cros…
The production flow sheet for titanium-containing low carbon steel (/% : 0.05-0.10C, 0.70-0.95Si, 1.45-1.65Mn, ≤0.025P, ≤0.025S, 0.10-0.20Ti) is BF hot metal-35 t LD-LF-150 mm x 150 mm casting process. For titanium-containing low carbon steel deoxidizing by minor aluminium due to higher A12O3content in LF refining sla…
Based on the measured value of ingot surface temperature in ingot stripping at situ, with using ProCAST software the calculation model for filling and solidifying process of 3 t ingot (body height 1675 mm, hot top inclined angle 65. 3° , height of liquid surface in hot top 290 mm) of steel SCM822H (/% ： 0.20C, 0.80Mn,…
Tested EA4T axle steel (/% : 0. 26C, 0. 35Si, 0. 75Mn, 0. 01 IP, 0. 012S, 1. 04Cr, 0. 22Mo) is melted by a 10 kg vacuum induction furnace. The single pass reduction test on tested EA4T axle steel is carried out by using Gleeble-1500 thermal simulation machine to study the effect of temperature (950 ~ 1 150℃) , strain…
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…