Materials Literature
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A oxygen lance jet examination system with coherent jet oxygen lance Laval nozzle containing central main hole and 16 auxiliary holes is used to study the oxygen jet central velocity weakening rule, measure the coherent jet produced with accompanying flow of helium at ambient temperature to replace shielding gas burni…
With analysis on the mechanism of early stages slag making by limestone and calculation of heat balance in converter, it is obtained that as controlling limestone consumption 6.0 t/heat, the hot metal consumption must increase by 2.1 t/heat and the scrap consumption shall decrease by 2.5 t/heat, it may insure that the…
The surface of 300 mm x 360 mm low carbon steel casting bloom produced by using original mold powder [/%: 25. 64 CaO, 22. 72SiO25. 69MgO, 8.29Al2O311. 87 (Na2O + K2O), 5. 49CaF25. 10BaO] easily produces network cracks at steel work. With analysis on 由e relativity between mold powder lubricating property and metallurgi…
The Φ5.5 mm rod coil of steel 9Crl8 (/% ： 0.95C, 0.35Si, 0.37Mn, 0.032P, 0.002S, 17.42Cr,0.01Mo) is produced by 50t EAF-AOD- LF- VD- 150 mm x 150 mm billet concasting- high speed rod rolling process. With using the process measures including controlling [S] ≤ 0.008% , adding 0.05% RE elements, concasting billet high-t…
The distribution of V-segregation at longitudinal and cross section of ø380 mm continuous casting bloom of bearing steel GCrl5 and the structure morphology of V-segregation band have been studied. Results show that the V-segregation forms in central equiaxial crystal zone by symmetrical about center line of casting bl…
Based on double sub-lattice model, a compound thermodynamic model of (NbxTi1-x) (CyN1-y) is established ,and the mol fraction, atom site ratio and precipitation sequence of each ingredient in precipitated phase of Nb-Ti microalloying ultra-low carbon steel (/% ：0.02C, 0.12Si, 1.70Mn, 0.012P, 0.004S, 0.101Nb, 0.009Ti,…
The cause for fracture of partial 22 t 170 mm x 1 650 mm x 10 000 mm casting slab of steel 25SiMn2 during crane-conveying process has been examined and analyzed. Results show that during casting the superheating extent of liquid steel in tundish is higher (30 ~36 °C) led to significant columnar crystal growth at 1/4 t…
The test steel 00Cr13Ni7Co5Mo4W (/% ： 0.007C, 13.23Cr, 7.02Ni, 5.06Co, 3.72Mo, 0.96W) is melted by a 50 kg vacuum induction furnace, cast to 10 kg ingot, forged to 55 mm x 55 mm billet and rolled to 3 mm x 60 mm strip. The precipitating behavior of the steel is analyzed by thermodynamic calculation software Thermo-Cal…
The austenite dynamic recrystallizing process of VIF melted and forged 625 mm bar of Nb-V-Ti microalloying 0. 37C-1.45Mn non-quenched and tempered steel (/%: 0. 37C, 0. 60Si, 1. 45Mn, 0. 025Nb, 0. 078V, 0.017Ti) with single pass compression, strain rate 0. 1 ~ 10 s-1and reduction by 60% at 950 ~ 1 150 ℃ has been studi…
The in-line examination and statistics on casting process for 220 ~ 320 mm x 1 800 ~ 2 700 mm wide-thick slab of 0.07% ~0,18% C steel have been carried out for one year at steel work to study the effect of process parameters including casting rate (0.65 ~ 1. 2 m/min), liquid superheating extent (13-35 ℃), mold inlet w…
A mathematic model for solidification process of 35 t polygonal ingot of 40CrNiMo steel (/% ： 0.37-0.44C, 0.17-0.34Si, 0.50-0.80Mn, ≤0.035P, ≤0.035S, 0. 60-0.90Cr, 1.25-1.65Ni, 0.15-0.25Mo) has been established by using three-dimensional software Procast to simulate the ingot temperature field and steel shrinkage rate…
Based on turbulent model and VOF model, the numerical simulation and analysis on gas-slag-liquid three- phase flow field in 210 t ladle furnace (LF) during argon blowing have been carried out by using CFD fluid engineering simulation software FLUENT6. 3.26 to get the effect of bottom blowing porous plug position (sing…
The hot compression test on steel 30NiCrMoV12 for high speed train axles (/% : 0.26C, 0.33Si, 0.62Mn, 3.01 Ni, 0.82Cr, 0.56Mo, 0.10V) with strain rate 0.01-10 s-1at 850-1150 ℃ has been carried out by using Gleeble-3500 thermal simulation machine with specimen cutting from 0250 mm forges. The austenite deformation beha…
A mathematical model for supersonic jet oxygen lance with axial calculated length 2 200 mm and diametrical calculated length 800 mm is established by using GAMBIT and the numerical simulation study on characteristics of the supersonic jet oxygen lance has been carried out by using FLUENT software. The supersonic jet c…
Effect of the initial cladding ratio 5.40%-15.53% with 0.45C steel, NM360 abrasion-resistant steel, 310S and 316 stainless steel 5.1-15.2 mm initial cladding plate and Q345 carbon steel 82.7-90.0 mm initial base plate and the total reduction 35%-75% on cladding ratio of clad steel plate hot-rolled at 1150-1000 ℃ has b…
The flow sheet for bearing steel G55SiMoVA for oil drilling tool (/% ： 0.52-0.55C, 0.90-1.l0Si, 0.30-0.50Mn, 0.40-0.60Mo, 0.20-0.30V, ≤0.015P, ≤0.015S) is scrap+60%-70% hot metal-50 t UHP EBT EAF-60 t LF-VD-260 mm x 300 mm CC process. With using foaming slag submerged arc operation in whole period of arc furnace steel…
The effect of annealing temperature (at 760 ~ 880 ℃ for 7 min) and time (at 820 ℃ for 3 ~ 9 min) on grain size, recrystallization rate and texture of 0. 3 mm cold-rolled sheet of oriented silicon steel (/% : 0. 046C, 3.07Si, 0. 09Mn, 0. 029P, 0. 004S, 0. 005Al) has been tested and studied. Results show that with optim…
The compound-slab (/mm) 415 x 1 630 x2 570 for compound-rolling is got by removing the scale of awaiting compound-rolling faces of double (/mm)210 x 1 630 x 2 570 Q345B steel casting slabs, cutting circle welding V and welding together. By vacuum-pumping compound-slab cave, packing and heating to 1 220 ~ 1 260 °C the…
The test steel 1Cr17Mn6Ni5N (/% ： 0. 09 ~ 0.11C, 0.19 ~ 0.29Si, 7.33~7.42Mn, 0.011 -0.015P, 0. 004 ~ 0. 007S, 16. 87 ~ 17. 24Cr, 5. 06 ~5.19Ni, 0. 21 ~0. 40N) is melted by a 10 kg vacuum induction furnace with adding chromium nitride to N-alloying in nitrogen atmosphere. The compression 60% experiment of test steel in…
Test normal A36 steel and containing Ce A36Ce steel for shipbuilding (/% : 0.12-0.13C, 0.21 Si, 0.77-0.79Mn, 0.013-0.015P, 0.003-0.004S, 0.32-0.33Cr, 0.023-0.025Al, 0-0.009Ce) are melted by vacuum induction furnace, cast to 7 kg ingot, forged to 25 mm x 25 mm billet and normalized at 865 °C for 0. 5 h. The corrosion r…