Materials Literature
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In recent years, in order to meet the application requirement of specialty steel grades such as ultra fine grain steel, dual phase steel (DP) , transformation induce plasticity steel (TRIP) and interstitial free atom steel (IF) , the ≥150 ℃/s ultra fast cooling technology with high efficiency of heat exchange, tempera…
The cold-rolled non-oriented silicon steel (/%: 0.003C, 2.35Si, 0.22Mn, 0.011P, 0,002S, 0. 36Al, 0.003 0N) is cold-rolled to 0.35 mm sheet from 2. 3 mm hot-rolled plate normalized at 890 °C or 940 for 3 min. The effect of normalizing temperature and annealing process at 800 ~ 920 ℃ for 3 min on high frequency (400 Hz)…
The test interstitial-free steel IF(/% : 0.0036-0.0049C, 0.005-0.007Si, 0.11-0.12Mn, 0.007P, 0.005S, 0.007-0.011Alt, 0.047-0.051Ti, 0.0030N, 0-0.0037Ce) is melted by a 10 kg vacuum induction furnace, and forged to 30 mm x 25 mm billet, finishing forging at 950 ℃ , air cooling. With using Gleeble-1500D thermal simulati…
Test steel CrNi3Si2MoV (/% ： 0.21C, 1.75Si 0.29Mn, 0.006 0P, 0.0007S, 1.03Cr, 2.86Ni, 0.31 Mo, 0.08V) is melted by a 50 kg vacuum induction furnace and forged to φ15 mm bar product. The effect of hot deformation on structure and hardness of test steel CrNi3Si2MoV austenitized at 1 200 ℃, then hot deforming with 10% 〜…
The distribution of magnetic field and Joule heat field of electrode, slag and remelting ingot system during electroslag remelting (ESR) process is obtained by using finite element software ANSYS, and the effect of electrode filling ratio 0. 3 ~ 0. 7 in three-dimension ESR process coupling magnetic field and Joule hea…
The structure and properties of three alloys 0.05C-25Cr-37Ni-0.6Nb(0.6Nb), 0.05C-25Cr-37Ni-0.6Nb-0.6Ti(0.6Nb-0.6Ti) and 0.05C-25Cr-37Ni-l.8Nb( 1.8Nb) melted by 150 kg vacuum induction furnace, rolled to 30 mm plate and solid-solution-treated at 1160-1220 ℃ for 1 h, air cooling have been studied. Results show that as c…
An analysis on the surface crack formation for crankshaft forgings of steel 42CrMo (/%: 0. 43C, 0. 77Mn, 0. 24Si, 0. 014P, 0. 007S, 1. 08Cr, 0.17Mo, 0. 01Cu) with 865 ℃ 1. 5 h oil quenching + 640 ℃ 4 h tempering, water cooling has been carried out. Results show that the surface cracks of crankshaft forgings are quench…
The effect of basicity, BaO(6%-14% ), CaF2(0-10% ) and A12O3(18%-28% ) on semispherical melting-point and melting rate of basic refining slag series CaO-SiO2-A12O3-MgO-CaF2 has been studied with CQKJ-III mineral slag melting temperature measure device and MTLQ-RD-1300 semispherical melting point (melting temperature)…
Linear expansion coefficient, differential scanning calorimetric (DSC) and heat capacity at constant pressure (Cp) curves, and high temperature mechanical properties of austenite stainless steel 304 (/%: 0. 040C, 0. 45Si, 1. 18Mn, 0. 030P, 0. 003 S, 17. 24 Cr, 8. 11 Ni) 40 mm x 1 500 mm hot-rolled plate are tested and…
The test 600 MPa grade high strength steel (/% : 0.23C, 0.67Si, 1.35Mn, 0.028P, 0.023S, 0.131V, 0.033Nb) is melted by a 25 kg vacuum induction furnace and hot-rolled to 16 mm x 180 mm slab product. With dilatometric test combined with structure metalloscopy and microhardness test the continuous cooling transformation…
Test 0. 8 mm cold rolled sheet of 390 MPa IF steel (/%: 0. 005C, 0.04Si, 0. 35Mn, 0. 095P, 0. 005S, 0. 030Nb, 0. 016Ti, 0. 036Alt) is cold rolled by 4 mm hot rolled plate. The effect of continuous annealing temperature 780 ~ 820 °C on structure, texture and mechanical properties of the IF steel has been studied. Resul…
The production flow sheet for 2. 5 mm hot rolled strip of austenite stainless steel 06Cr18Ni5Mn7Cu3N is 70 t EAF-70 t bottom-blown GOR converter-LF-180 mm x 1240 mm slab CC-hot rolling process. The peeling defects with width ≤ 20 mm and depth ≤ 0.06 mm occur at distance about 30 mm from edge of pickled 2.5 mm hot-roll…
According to solidifying and mechanical characteristics of low carbon steel Q235B 230 mm x 1500 mm slab at elevated temperature, a couple thermal and mechanical finite element analysis model for temperature field and stress field of slab during casting process has been established, and the coupling calculation is carr…
The effect of original finish rolling process [finish rolling at ≥930℃. and wire coiling at (870 土 10) ℃] and improved finish rolling process [finish rolling at ≥950 ℃and wire coiling at (900 ± 10) ℃] for φ5.5 mm 0.73% C 72A tire cord steel coil on its structure, texture and mechanical properties has been studied by u…
The structure and composition of slag shell and final slag during remelting process of 9. 5 t remelting ingot of hot working die steel H13 with 380 kg 60CaF2-30Al2O3-10CaO ternary slag system have been analyzed. Results show that during electroslag remelting process the slag shell presents obvious laminating-structure…
According to metallurgical quality issue about low billet yield of hot working die steel H13 at steel works, the statistic analysis on relative quality to influence on billet yield has been carried out to get that the porosity defects caused by poor insulation of hot top make up 58%-76% of the total non-qualified ingo…
With process measures including charging 30 ~40 t hot metal and 12 〜16 t quality scrap in 50 t EAF, EBT slag free tapping and adding 150 ~200 kg steel-clad aluminum to pre-deoxidize, diffusion deoxidation by SiC and controlling refining slag basicity 4.0 ~6.9 in LF process, soft argon blowing before and after VD, shie…
The production flow sheet for stainless steels steelmaking at Taishan Steel Works is 60 t EAF-GOR bottom blowing converter refining-160 mm x 1600 mm slab casting process. With using Gleeble-1500D thermal simulation testing machine, the high temperature properties of casting slab of austenite stainless steel 201 ( 6.54…
In order to alleviate the impact of flow jet of nozzle side-ports on solidifying shell and easy to use the sideport nozzle to the mold for casting square billet with smaller cross section, a design idea of submerged entry nozzle ( SEN) with flabelliform side-ports is advanced. The characteristics of flow field and tem…
The metallurgical flow sheet of developed 25 mm Q800CFE steel plate (/% : 0.04-0.08C, 0.20-0.50Si, 1.50-1.80Mn, ≤0.015P, ≤0.005S, 0.015-0.060Nb, ≤0.30Mo, ≤0.03Ti, 0.0008-0.0030B； crack sensitivity index ≤0.23) is metal pretreatment-120 t BOF-LF-RH-220 mm CC-rolling process. Finishing plate rolling temperature is ≤850…