Materials Literature
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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…
According to existing metallurgical quality issue for production of non-quenched and tempered steel MnVS series including low yield of sulfur, poor casting characteristics and low qualified ratio of steel products in nondestructive testing, with stable sulfur wire feeding speed 80 ~ 100 m/min, using premelted refining…
According to the results of analysis on performance of present mold powder FRK-2 and FRK-49 at steel works, based on mold powder FRK-2 (/% ： 32. 68SiO224.42CaO, 3. 30MgO, 9. 52Al2O35.40Na2O, 3. 10Fe2O33. 59F-12. 60C) a mold powder for casting 150 mm x 150 mm billet of free cutting steel X1215 (/% ： 0. 06 ~0. 09C, ≤ 0.…
The low silicon high purity fluorite ball (80% -90% CaF2≤8. 0% SiO2) is developed by new fluorite ball process technology at Fogang Deyu Fluorite Bail Co. Due to high CaF2 content, low chalking ratio, damp-proof, increasing smelting slag speed to shorten steelmaking period, it is widely used in steelmaking of stainles…
By using Gleeble-3500 thermal mechanical simulator, deformation resistance of 150 mm casting slab of 0. 47C-0. 36Si-0. 67Mn medium carbon steel with strain 0. 1 ~0. 6 and strain rate 10 ~ 20 s-1at 650 ~920℃ in single pass axial compression process is tested and studied, and a math model for deformation resistance of t…
The steel LG40Cr for connecting rod (/% : 0. 40C, 0. 24Si, 0. 72Mn, 0. 016P, 0. 005S, 0. 98Cr, 0. 036Al) is produced by 50 t EAF-60 t LF-VD-260 mm x 300 mm bloom concasting- continuous rolling Φ70 mm round bar process flow sheet at Laiwu Special Steel Division. 30 samples of steel LG40Cr are used to carry out rotating…
According to similarity ratio 1 ： 10, a simulation on rolling process of hot-rolled U-section steel sheet piling is carried out by using laboratory mill with test stock of lead and the relationship between rolling conditions and end bending of hot-rolled U-section steel sheet piling is obtained by change 4 kinds of ro…