Materials Literature
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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…
According to 150 t ladle with double holes bottom argon blowing at steel works, based on similarity principle a water model with geometric ratio 1 ：5 is established to get the liquid surface bared area, change rule of steel-slag entrapment condition and critical slag entrapment blowing gas rate for prototype ladle and…
According to the buckling defects of hot rolled U-section sheet pile ( steel SY390BZ /% : 0.23C, 1.60Mn, 0.44Si, 0.18V, 0.18Ti, 0.05Nb) formed during rolling process, the numerical-simulated calculation on finishing process of sheet pile has been carried out by using the dynamic-explicit-calculated method of finite el…
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…