Materials Literature
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According to measured copper plate temperature and cooling parameters of ASP ( Angang Strip Production) slab concaster at situ, a heat transfer model for ASP slab mould (height 1 000 mm, slab cross-section 170 mm x 2 000 mm) has been established to calculate the distribution function of mould heat flux and get the rel…
The effect of temperature of liquid steel in tundish during casting,liquid level fluctuation in mold,[Als], sequence heats of tundish and fluctuation of 280 mm×380 mm bloom casting speed on rolled billet comer cracks of steel 34Mn2V for high pressure bottle was analyzed by processes comparison. The process measures ha…
Efiect of annealing at 700～900 ℃ on structure and mechanical properties of 00Cr12Ti steel 1 mm sheet produced by 25 kg vacuum induction funace melting,7 passes hot rolling to 3 mm plate and cold rolling process has been studied. Results showed that with annealing at 850 ℃ for 2 min the cold rolled sheet has excellent…
The W600 non-oriented silicon steel is produced by 120 t LD (top and bottom combined blown) -RH-LF- 70 mm and 90 mm thin slab concasting-continuous rolling process at No1 Steelworks, Maanshan Steel. The chemical composition C≤0. 005% , P0. 050% , Als0.20% and N≤40 x 10-6was controlled by using the measures such as con…
Test air-cooled low carbon Bainitic steel DB590(0.06C,0.92Mn,0.49Mo,0.65Cr,0.02Nb,0.08V, 0.0010B)was melted by a 50 kg vacuum induction fumace,cast to 22 kg ingot,forged to 100 mm×100 mm×150 mm billet then control-rolled to 16 mm plate,air-cooled. The CCT curves of the steel have been got by Gleeble 1500 thermal simul…
It is presented a scheme for full process automation to realize collecting,adjusting,remote-transmitting and displaying and anal zing data of liquid steel sample during steelmaking by developed second software based on software Bo- land Delphi 6 and combined SQL Server 2000 data base technique and corresponding hardwa…
According to hot simulation test results by Gleeble 1500D machine, the analytic expression between flow peak stress σpand Zener-Hollomon factor Z ( T, ε ) for Ti-Nb IF ( interstitial atom free) steel (0. 005C, 0. 055Al, 0. 01 Nb, 0. 08Ti) in ferrite temperature area (840 - 780 °C ) has been obtained ； and the hot proc…
The 6.5% Si silicon-steel sheet has excellent electromagnetic properties.It is an idea material for electro- magnetic device to realize high efficiency,save energy and portability. The history of investigation on 6.5% Si sheet is presented and the preparation technique such as cold rolling,quenching solidifying of mol…
With optimized process measures such as decreasing mold cooling intensity, improving water distribution of mold board and narrow face, prolonging the length of secondary cooling zones, properly increasing casting specific water flow rate and adjusting of water flow proportion of each secondary cooling zone,the quality…
The effect of hot metal charging rate on electric power and oxygen consumption per ton steel,tap to tap time and melting cost of an 100 t shaft arc furnace at Anyang Steel was analyzed and studied. The oxygen supply intensity for this arc fumace can reach up to1.6 m3/(t·min)by using arc fumace wall USTB coherent oxyge…
The reduction of area and tensile strength of Φ10 mm×120 mm specimen drilled and turned from 280 mm ×380 mm cast billet of0.03Nb,0.03Nb-0.02Vand 0.05VMicroalloyed 0.75~0.78C high carbon steel have been tested at 1300~800 ℃ by Cleeble 1500D thermal simulation machine.Results showed that the hot plasticity of V-steel in…
The influence factors on Ti yield ratio, the effect of Ti content on Ti inclusion content in steel and austenite grain growth tendency and the effect of C - Ti on hardenability and mechanical properties of gear steel 20CrMnTi have been studied. Results showed that with Ti content more than 0. 03% , the amount of Ti in…
The structure of welded junction of 1Cr18Ni9Ti austenite stainless steel plate and 1Crl3 martensite stain- less steel plate welding by 1Cr18Ni9Ti electrode has been observed and analyzed by metallographic method; and the polarization curves and alternating current impedance curves were measured by immersion test of si…
Based on analyzed and calculated finite content and pearlite lamellar spacing in (0. 56 *0. 63C, 0. 60 ~ 0. 71Mn, 0. 23 〜0. 28Si) high carbon steel by optical and scanning electron microscope using quantimet technique, the mathematical model for relationship between structure and yield strength of high carbon steel wi…
The products B50A700T(≤0.003C,1.25～0.65Si)and B50A1300T(≤0.003C,0.50～0. 15Si)of scmi-process non-oriented electrical steel with coating are produced by hot metal pretreatment-top and bottom combined blowing converter-RH-CC-hot rolling-cold rolling-annealing process at Baosteel.Effect of annealing temperature at 550～90…
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…