Materials Literature
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The N80-1 oil casing pipe steel (36Mn2V, % : 0.34-0.38C, 0.25-0.40Si, 1.45-1.70Mn, ≤ 0.020P, ≤ 0.015S, 0.01 -0.04Al, 0.11-0.16V, (Sn + Sb + As + Pb + Bi) ≤ 0.035, [O] ≤ 35 x 10-6[N] ≤ 80 x 10-6[H] ≤ 2.5 x 10-6is melted by 80t top and bottom combined blown converter-LF-VD-Φ210 ~ 270 mm round bloom casting process. With…
A computer simulation analysis on heat treatment process (electromagnetic induction heating for 55 s, air cooling for 8 s, wind cooling for 42 s then air cooling to ambient) of heavy rail end of steel U71Mn (% : 0.65 -0.76C, 0.15 ~0.35Si, 1.10~1.40Mn, ≤0.030V, ≤0.025Ti) has been carried out by using finite element met…
The effect of austenizing time (30 - 100 s) at 850 °C on structure and mechanical properties of 1 mm sheet of DF78O cold rolled dual phase steel (% ： 0.15C, 1.80Mn, 0.08Ti, 0.04Al) has been studied by using continuous annealing simulation machine. Results show that with conditions of austenizing at 850 X., cooling to…
The effect of location and number of gas permeable brick and bottom argon supply rate on mixing time of liquid in a 90 t ladle furnace at steelworks has been tested and studied by using water model with 1：2.5 geometric resemble scale. Results show that the optimum ladle furnace gas permeable brick is located under dum…
The 0.5-2.5 mm cold rolled sheet of test magnetic pure iron is rolled by 350 mm four high reversing finishing mill from 3.5-4.5 mm hot continuous rolled plate of magnetic pure iron (% ： 0.005C, 0.50 Al). Results show that the optimum annealing temperature for the magnetic pure iron sheet to get smaller coercive force…
The solubility of nitrogen in solid stainless steel 304, 304L, 301S and 301L (γ-phase) and in melts of austenite stainless steel has been calculated by using thermodynamic analysis method to get computational model for solubility of nitrogen in the steels, and the experimental research on nitriding behavior in four au…
The production process flow sheet for 198 〜308 mm heavy plate of developed die steel 718 ( % : 0.32〜0.40C, 0.30~0.50Si, 1.00~1.50Mn, ≤0.016P, ≤0.005S, 1.50~2.00Cr, 0.40-0.50Mo, 0.80~1.20Ni, 0.020-0.045Al) is 90 ~ 100 t EAF-LF-VD-40 t ESR (950 mm x 2 000 mm slab) -rolling (control cooling) -heat treatment. Examination…
Key words:Bloom of Heavy Rail Steel,Numerical Simulation,End Position of Solidification,Soft Reduction,Center Porosity
The effect of long-term aging at 620 ℃ on structure and mechanical properties of a new ferrite heat resistant steel 1Cr11Co3W3MoVNbNB (%： 0.10C, 11.08Cr, 3.20Co, 2.54W, 0.52Ni, 0.15Mo, 0.09Nb, 0.21N, 0.014B) oil-quenched at 1100 °C + high temperature tempered at 720 ℃. has been studied by using X-ray diffraction metho…
Based on insuring both mould slag with similar viscosity and melting temperature by using B2O3as a substitute solvent to replace CaF2in fluorine-containing mould flux, the temperature and capacity of crystallization of fluorine-containing mould flux (%): 31. 1 ~ 35. 5CaO, 33. 9 〜38. 5SiO212A12O33MgO, 5Na2O, 6 ~ 15CaF2…
The effect of grade of iron and steel scrap and charge matching mode on electric power consumption, tap to tap time and metallurgical quality of an 150 t Fuchs shaft furnace at Zhusteel. Results show that the requirements of max adding amount of pig iron and sponge iron, match of capacity of up and down procedure, con…
Hot tension test with strain rate 5×10-3s-1and hot reduction test with deformation 60% and strain rate 1×100s-1for 0～0.034% Ce super duplex stainless steel 00Cr25Ni7Mo4N (%:0.016～0.020C,24.50～24.72Cr, 7.06~7. 18Ni,3.61~3.73Mo,0.26~0.27N) at 950~1200℃ have been carried out by using Gleeble- 1500D thermal simulation mac…
The dynamic recrystallization behavior of Cu-P-Cr-Ni-Mo weathering steel (% ： 0. 10C, 0. 075P, 0. 65Cr, 0. 22Ni, 0.43Mo, 0. 28Cu) with strain rate 0. 01 ~ 1 s ~1 at 850 — 1 150 T： has been studied by Gleeble-3500 thermal simulation test machine to get true train-true stress curves in austenite area and dynamic recryst…
The cracks at surface of 150 mm round bar occur after rolled from 260 mm×300 mm continuous casting bloom of steel Q235D (0. 10%～0. 17%C) melted by 50 t UHP EAF (hot metal charging ratio more than 50%) + LF (VD)process at Special Steel Workesley Steel. Analysis indicated that the larger the △C-difference between carbon…
The X65 pipeline steel 13MnNbTi (% ： 0. 10 ~Q 16C, 1.20 ~ 1.40Mn, 0. 03 ~0. 05Nb, 0.01 ~0. 02Ti, 0.025 ~0. 05Al) is pilot-produced by 120 t top and bottom combined blown converter-100 t LF (VD) -5 strands Φ300 mm round bloom casting flow sheet at steelmaking plant, Baotou Steel Union Co Ltd. Production practice shows…
The production flow sheet for (6～× (1600 ×3200) mm plate of developed low carbon bainitic steel Q650(%:0.06~0.08C,1.6~1.8Mn, ≤0.3Cr, ≤0.06Nb, ≤0.02Ti, ≤, ≤0. 15Mo, ≤0.05V, ≤0.002B) is hot metal pretreatment - 120 t converter - LF refining -slab casting - control rolling and cooling process.With controlling single pass…
Numerical simulation of mold filling and solidification process of liquid for Q215 steel 750 mm x450 mm x 120 mm shaped slab concasting mold with single submerged nozzle and double submerged nozzles has been carried out by u- sing CFD commercial software Flow-3 d to get the distribution diagrams of velocity field and…
With summarizing the technology materials about 100 t EAF wall oxygen lance of PRAXAIR, BSE and MORE, the characteristics of the equipment are analyzed to compare the main technical parameters including main production and quality indexes, main power and material consumption indexes. The optimum oxygen supply in whole…
A study on Metallurgical quality of first heat U71Mn and U75V heavy rail steel produced by 100 t LD-LF- VD-280 mm x 380 mm casting bloom flow sheet has been carried out. Statistic results show that although the overheating extent (21 ~38℃) of first heat liquid is higher, the max hydrogen content, oxygen content in end…
The 15NiCuMoNb5-64 steel (%:0. 14C,1. 14Ni,0.62Cu,0.32Mo,0.020Nb) is melted by 100 t EAF+LF+VD-Ingot casting process, forged to Φ φ350 mm tube blank and hot-rolled to Φ 323.9 mm×14.2 mm steel tube by Φ460 mm PQF steel mill. The metallurgical quality, mechanical properties, brittle transformation temperature and stress…