Materials Literature
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Three dimensional numerical simulation on steel works 200 mm x 1600 mm casting slab two-strand T- shape 23 t tundish 4 kinds of structure scheme-present baffle wall and dam, turbulence inhibitor and dam, turbulence inhibitor and present baffle, wall as well as new baffle has been carried out by using calculation fluid…
The production flow sheet for developed 20 mm low-cost niobium-titanium-boron microalloying low carbon steel plate (/% : 0. 06C, 0. 40Si, 1. 60Mn, 0. 010P, 0. 005S, 0. 050Nb, 0. 012Ti, 0. 002B) is 130 t top and bottom combined blown converter-LF-RH-250 mm slab casting-4300 mill rolling-direct quenching-tempering proce…
The production flow sheet for heavy bloom of steel Q345E (/% : 0.14-0.17C, 0.20-0.30Si, 1.28-1.38Mn, ≤0.011P, ≤0.005S, 0.015-0.030A1, 0.032-0.045V) is 65 t LD-LF-VD-Φ600 mm round bloom CC process. With the measures including using sliding plate to stop slag in tapping , and adding pre-melted synthetic slag (/% : 40-50…
The production flow sheet for X65 etc. clean pipeline steel at Tianjin Pipe is 100 I UHP EAF-LF-RH- Φ310 ~Φ500 mm CC process. With using the process measures including charging 35% 〜40% hot metal in arc furnace, controlling slag amount no less than 22 kg/1 at Al consumption 1. 85 kg/t, controlling refining slag index…
Test steel 508-3 (/% : 0. 19C, 0. 26Si, 1.48Mn, 0. 009P, 0. 007S, 0. 78Ni, 0. 50Mo, 0.003Al) is melted by a vacuum induction furnace and cast to 50 kg ingot, forged at 1 150 to Φ16 mm bar, end forging ≥900℃.The effect of normalizing temperature (900 ~ 1 200 °C) and multi-normalizing process (900 〜1 200℃ 1 h-900℃ 1 h-8…
With using Setsys Evolution synchronous thermal analysis system the thermodynamic process of reaction of MgO-C-S (FeS) on 3 kinds of scheme- (1 ) magnesium oxide + carbon powder + sulphur , ( 2 ) magnesium oxide + carbon powder + ferrous sulfide and (3 ) magnesium oxide + carbon powder + ferrous sulfide + aluminum pow…
According to the test research on structure and texture of head, meddle and end of 35W300 high grade 0.35 mm cold rolled non-oriented electrical steel strip coil (/% : 0.002C, 2.71Si, 0.22Mn, 0.015P, 0.003S, 0.0020N, 0.55Als) and corresponding magnetic properties, It is found that due to 12 MPa high pressure water con…
In order to study the influence of the thrust/tension (0 ~ 15 MPa) on rolling process of stainless steel (Crl8Ni8, 2 mm thickness tube)/low carbon steel (0. 06% ~0. 12% C, 4>16 mm, round bar) clad rebar, a finite element model for clad rebar rolling process is established by using finite element software Msc. Marc. Th…
The tested H section steel Q235 (/% : 0.06C, 0.30Si, 1.60Mn, 0.010P, 0.003S, 0.025Mo, 0.40Ni, 0.017Ti, 0.15Cu) is produced by 80 t LD-LF-feeding silicon-calcium wire-28 t tundish-430 mm x 300 mm x 85 mm H section CC bloom-hot rolling process. Due to the longitudinal crack easily occurred on surface of H section steel…
The flow sheet for production of 2 mm ribbon steel Q195L (/%, ：≤0. 08C, 0.05 ~ 0.10Si, 0.30 ~ 0.40Mn, ≤0. 035P, ≤0.035S) is 80 t converter-ladle alloying and soft argon blowing-150 mm x 150 mm billet casting ribbon steel rolling process. Analysis on edge crack ribbon steel results by using optical, scanning electron m…
The chemical ingredient, physical-chemical properties and crystallized mineralogical phases of mold flux and slag rim for 200 mm slab of high aluminium non-magnetic steel 20Mn23AlV (% ： 0. 14 ~ 0. 20C, 21. 50 ~ 25.OOMn, 1. 50 ~2.50Al, 0. 04 ~0. 10V) during concasting has been compared and analyzed. The ingredient of m…
Thermodynamic calculation and analysis results show that in ordinary- pressure the reaction temperature (T) of carbon-thermal reduction for MgO is 1 854 °C, it is difficult under hot metal pre-treatment condition to realize situ desulfurization by generating magnesium from magnesite-based desulfurizer. As carbon-therm…
Finite element simulation on rolling process for 30CrMo steel 350 mm x 450 mm casting bloom with surface 1 150 ℃ and canter 1 240 ℃ rolling to 0230 mm bar products is earned out to study effect of rolling parameters including single pass 10% ~ 30% reduction ratio, double pass reduction 50 mm-50 mm, 10 mm-90 mm and 90…
Main technology parameters of four developed process: cast bloom higher temperature heating-double cold rolling or single cold rolling, lower temperature heating-double cold rolling or single rolling process for production of common grain oriented silicon steel (CGO) and high magnetic induction grain oriented silicon…
The production efficiency and cost for stainless steel steelmaking by HM DEP-KOBMS-VOD three-step process ( hot metal desiliconizing and dephosphorizing pretreatment-KOBMS converter decarburizing and alloying-vacuum oxygen decarburization) and EAF/BOF-AOD two-step process (300 series stainless steel parent melt steelm…
The 2. 9 mm hot rolled 3% Si high grade non-oriented silicon steel plate (/% ：0. 004 6 C, 3. 04Si, 0. 32Mn, 0. 49Als, 0. 004S, 0. 013P, 0. 004 2N) is produced by CSP ( Compact Strip Production) flow sheet i.e. 120 t BOF-70 nun CC-hot rolling process with end rolling at 872℃ and coiling at 683℃.The analysis results on…
According to calculation, for SP etc. low carbon steels the adding scrap ratio to control converter liquid end temperature is no less than 16% , but present scrap supply for 120 t converter is only up to 13% , led to liquid end temperature higher to effect lining life. According to analysis, the end temperature of liq…
The test alloy GH706 (/% : 0.034C, 16.l0Cr, 41. 13Ni, 1.64Ti, 2.93Nb, 0.39Al) and modified alloy (/% : 0.027C, 16.30Cr, 1.79Ti, 2.05Nb, 1.21 Al) are melted by a 200 kg vacuum induction furnace and remelted to 150 kg ESR ingot, then homogenizing-treated at 1 180 ℃T for 16 h and forged to Φ15 mm rod and heat-treated at…
Effect of ladle lining, tundish coating and covering agent on carbon pickup of liquid of ultra-low carbon steel MA ( ≤ 0.005% C) during 180 t RH refining end to 45 t tundish casting process has been studied by statistic data. Results show that for first heat of continuous-continuous casting heats, the carbon pickup of…
The carburizing temperature of common gear steels is 930 °C, as the carburizing temperature of steel increases to 1 000 ~ 1 050 °C the time of carburization process can be remarkably reduced but it easily leads to grain coarsening. Therefore, the high temperature carburization gear steels are developed by Nb, Ti, B mi…