Materials Literature
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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…
The ductility of 260 mm x 300 mm casting bloom of V microalloying non-quenched and tempered steel 36Mn2V (% ： 0. 36C, 1. 54Mn, 0. 12V, 0. 008 ~0. 010N) for casing pipe at 650 ~ 1 350 °C has been studied by using Gleeble-1500 thermal simulator. Results show that the zero strength temperature (ZST) and zero ductility te…
Based on thermodynamics calculation f the end deoxidation of 100 kg 0. 15C-t. 36Mn steel liquid in medium frequency induction furnace is carried out respectively by added 1 kg AlFe, 1 kg AlFe + feeding 0. 5 kg Ca wire, and 1 kg CaAl2. Results show that deoxidation rate of liquid by AlFe, AlFe + Ca and CaAl2is respecti…
High temperature mechanical properties of grain-oriented silicon steel(0.027%C,3.06%Si) melting by a 30 kg vacuum induction furnace in lab and simulating 50mm thin slab casting and rolling process have been tested by Gleeble- 1500D stress/strain thermal simulation machine.Results show that with strain rate 1×10-3s-1th…
The structure evolution of grain-oriented Si steel (%:0.04C,3. 16Si,0.50Cu) with main inhibitor Cu2S and low temperature slab reheating in 650~1050 ℃ high temperature annealing process has been studied by orientation distribution function and metallographic observation. Results show that the primary and secondary recr…
Hereditary feature of original coarse grain of steel OOCrl INil IMoTi rolled at 1 150 °C and solid-solution treated at 780 ~900 °C has been studied. Results show that there is a critical temperature Ac for the steel, at which the austenite renews nucleation and the heredity of coarse grain do not carried out; the Ac o…
The effect of gas bubble size, injection rate and blowing time on removal of hydrogen and inclusion in liquid steel during refining has been studied and analyzed by theory calculation. A large number of bubbles form in liquid steel as the argon gas injection through porous brick. Small bubbles are available to increas…
Developed status of steels for nuclear reactor pressure vessel at home and abroad is presented including re- querulent for analysis and properties, metallurgical process, heat treatment, and present situation of manufacture and application. The developed trend of steels for nuclear power station is discussed, as the s…
Water modeling test for a 25 t four-strand tundish with bottom blowing gas has been carried out by using porous plug with different performance parameters and combined with RTD curves and standard deviation analysis to study the effect of porous plug area (210 ~ 105 mm x 56 ~28 mm), 4 gas blowing location and gas rate…
According to the present status of research and development of high strength non-quenched and tempered cold heading steel at home and abroad, the chemical composition, characteristics of process, structure and mechanical properties of 800 ~ 1200 MPa high strength non-quenched and tempered cold heading steels are analy…
Effect of oxygen lance nozzles, lance level, top blowing rate and bottom blowing rate on bath mixing time, penetrating deptht impact area and splashing amount has been studied by orthogonal design test using 1： 6.35 water model for a 50 t top and bottom combined blown converter at Tang steel. Results show that as comp…
The studied steel 0Cr15Ni5WMoVNb(%:0.068C,14.54Cr,5.32Ni,0.88W,0.92Mo,0.20V, 0. 10Nb)is melted by 5 t medium frequency induction furnace+2 t vacuum electro-slag remelting furnace,then forged and hot rolled to φ45 mm bar products,and the test specimens solid-solution-treated at 1000 ℃ for 30 min +cold-treated at -70℃ f…