Materials Literature
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Test alloy steels 27Mn-3Si-3Al and 15Mn-2Si-3Al were melted by vacuum induction furnace, cast tot to 16.5 kg ingot, heated to 1200 ℃ and forged to φ25 mm bar. The 27Mn-3Si-3Al alloy steel maintained single-phase austenite structure before and after strain of which the stress-strain curve was smooth without apparent yi…
Based on theory of solubility of nitrogen in steel and de-nitriding kinetics, the control model of nitrogen alloying during AOD refining has been established. The application results for refining stainless steel 0Crl9Ni9N (≤0. 08C, 18 ~20Cr, 8 ~ 11Ni, 0. 10 ~0. 16N) by a 45 t AOD unit showed that it was available to a…
The converter combined blowing process was simulated by water model with 800 mm height and 118 mm bath depth. The effect of combined blowing operation parameters on size and space distribution of slag droplet dispersed phase has been studied by using parameter |M8|- proportional relationship between frequency occurren…
In order to be carried out austenite recrystallization control rolling, based on recrystallization diagram of GCr15 bearing steel produced by a 30 t converter at Shijiazhuang Steel and combined actual technology of Φ35 mm round bar rolled by 14 pass at 1 150 ~ 910 ℃ at situ, the simulation test to samples cut from con…
The effect of CaO-Al2O3-SiO2slag ingredient on T[O] in 0. 42C-1.15Cr-0. 2Mo steel and sulphur partition ratio Ls- (S)/[S] at 1 873 K has been studied by experiment of MgO crucible in Si-Mo high temperature furnace. It was found that with increasing slag basicity- ( CaO + MgO)/SiO2 from 1 to 3 , the T[O] dramatically d…
Free cutting steel Y15 (0. 10~0. 15C,1.00～1.20Mn,0.30S) is produced by 25t EAF-LF-657 kg ingot flow sheet at Xinin Special Steel. Test results indicated that with controlling arc furnace oxidizing end [C] 0.06%~ 0. 10% and in deoxidation process to control [0] (150~250) ×10-6Mn/S=2.77 and 0/S=0.059 in steel, most incl…
The deformation induced ferrite structure of Q235 steel was got with heating at 950 °C for 5 min,1°C/s cooling to 855 ℃ for 30 s and reduced 80% at strain rate 15 s-1then quenching by Gleeble 1500 thermal simulation machine, and the pro-eutectoid ferrite structure of the steel was got by heating at 950 °C for 5 min, f…
The rules of equilibrium phases precipitation in typical nickel base alloy Inconel 690 (0. 015C, 29. 42Cr, 9. 10Fe, 0. 26Ti ,0. 16A1) melted by Its vacuum induction furnace + ESR process and the effect of alloy chemical composition on M23 C6 phase precipitation behavior has been studied by Thermo-Calc software. The st…
Method,effect and function relation of static model and dynamic model for controlling end-point of converter steelmaking have been analyzed. According to the handicapped present situation of sensor for medium and small size converters,the comparison between optimal static model based on established GA-BP hybrid algori…
With the rapid increasing stainless steel output in recent years,the demand for ferrochromium and metallic nickel continuously increased at home. The resource situation of ferrochromium mineral and nickel mineral in china and production process for carbon ferrochrome and nickel are analyzed,based on the scarcity statu…
The simulation on temperature and rolling force of 68 mm slab of 0. 19-0. 20C steel during 6 passes rolling of compact strip production (CSP) process has been carried out by commercial software Marc with heavy deformed elasticplastic thermal-mechanical coupled finite element method to analyze distribution and change o…
Rolling test on steel plate(0.09C,0. 12Si,0.98Mn,0.010P,0.005S,0.010Nb,0.04Als)for wheel spoke with finishing rolling temperature 830～890 ℃ and coiling temperature 620～680 ℃ has been carried out by 1700mm hot rolling mill train. Results showed that with slab heating temperature 1230~1250 ℃,finishing rolling tem- perat…
The test results showed that with increasing normalizing temperature from 850 ℃ to1100 ℃,the average grain size of 2.5 mm hot rolled plate of 0.005C-3.0Si non-oriented electric steel increased from 60 μm to 200 μm,and with normalizing at 1000 ℃ for hot rolled plate,the grain size of 0.5 mm cold rolled sheet annealed a…
The hot deformation behavior and structure evolution of austenite-ferrite dual phase stainless steel 00Cr21Ni2Mn5N with strain rate 5 - 50 s-1reduction ratio 60% at 850 ~ 1 150 ℃ have been studied by using Gleeble- 3800 thermo-mechanical simulator etc. Results showed that with increasing temperature the flow stress of…
The surface micro cracks of 25 mm hot rolled plate rolled by cast slab of C-Mn steel(0.13～0.20C, 1.00~1.60Mn,0.09Cu,0.07As,0.05Sn)have been studied by scanning electron microscope and X-ray energy dispersive spectrometer.Results showed that there was thin oxidizing-decarburizing layer at both sides of surface crack,th…
The physical and chemical properties, and structure of crystallizing phases of two kinds of flux • 56 ~ 58 melilite, 25 -27 grammite, 4 ~5 lance spar, 10 - 12 glass phase and 20 -22 melilite, 78 ~80 glass phase, and ingredient, melting temperature and thickness of liquid slag layer used for 180 - 200 mm slab casting a…
The precipitated phase particles in ferrite-martensite dual phase steel(0.08C,0.22Si,1.02Mn, 0.02Nb,0.013Ti,0.034Al)rolled by φ450 mill with control rolling and cooling process in laboratory has been studied by using carbon extraction-replica technique.Results showed that there was(Nb,Ti)(CN)precipitates with size bei…
In according with production conditions for 60 mm thin slab concasting with 150 t ladle and 28 t tundish, the effect of outlet area ratio(2.0~2.4),outlet angle(15°~35°),immersed depth(210～270 mm)and casting speed (4.0~5.0m/min)on liquid flow field has been studied by using 1:2 water model test in orthogonal design to…
It was indicated by analysis on bulge-like inner overlap of Φ245 mm×12 mm casing tube of steel 26CrMo4V(0.26C,0.95Cr,0. 16Mo,0.07V)that the defects distributed random at the same side of inner wall and there was Si-Mn-Fe compound oxide layer in overlap.It was considered that the bonding of eccentric shrinkage cavity i…
Numerical simulation on blooming and rolling process for U75V steel heavy rail with 280 mm×380 mm cast bloom has been carried out by ANSYS/LS-DYNA software to optimize C pass of knifing pass and analyze on stress dis- tribution of cross section of blooming heavy rail before and after optimization. Results show that wi…