Materials Literature
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The φ25～160 mm round bars of gear steel 20CrMnTiH-0.20～0.22C,0.25～0.31Si,0.93~ 1.00Mn,1.03~1. 15Cr,0.05~0.08Ti were pilot-produced by 120 t converter- 130t LF+RH-280mm×380mm bloom concasting - hot rolling process at Panzhihua Steel. The examination results showed that oxygen content in steel was (10~20) ×10-6average14…
The 0.5 mm×480 mm 50W1300 non-oriented electrical steel sheet 3t (0.04～0.06C,0.82～0.96Si, 0.35~0.40Mn,0.015~0.017P,0.014~0.019S) has been researched and produced by using 40 t LD converter ·180 mm×495 mm slab concasting-continuous rolling flow sheet. The molten steel temperature was controlled between 1650 ℃ and 1670…
The effect of 0~0.49W,0.01~0. 13Mo,0.01~0.47Nb on fire resistant steel 0.03C,0.99～1.01Mn, 0.005～0.028Ti for building has studied by 600 ℃ high temperature stress-rupture test and TEM. Test results showed that there were no-rupture for the fire-resistant steels containing compound addition 0.05%~0. 13%Mo-0.47% Nb with…
The flow field characteristics and open phenomena of slag layer in bath of 150 t CAS ladle refining process have been simulated by 1 ： 4 water modelling device to get optimum blowing location and study effect of blowing parameters on bath mixing time. Results showed that the more the flow rate of injection, the bottom…
Based on materials balance model and heat balance model and combined with relative process parameters, the calculated models for process energy consumption of scrap-arc fumace steelmaking-concasting-continuous rolling(scrap- EAF)flow sheet and hot metal +scrap-arc fumace-concasting-continuous rolling(metal+ scrap-EAF)…
The structure and mechanical properties of 960～1020 ℃ solid solution treated + 720 ℃ 8 h furnace cooling to 620 ℃8 h air cooling double aging modified 718 alloy have been studied by X- ray diffraction(XRD)and scanning electron microscope(SEM).Results showed that with increasing solid solution temperature the ambient a…
The effect of 0.45% 〜1.44% Cu on low temperature tensile strain-induced martensite transformation in 304 stainless steel-0. 068 ~ 0. 072C, 18. 72 ~ 19.06Cr, 9. 40 ~9.46Ni at - 196℃ has been studied by X-ray difi&action analysis. Test results showed that the Cu had obvious depression action to strain-induced e martensi…
The characteristics of structure and grain, yield strength -ultimate tensile strength(YS-UTS)xatio,and c longation of 2.0～12.7 mm steel Q345B strip produced by CSP process(71 mm cast slab)and conventional process(250 mm cast slab)have been analyzed by quantimet and statistic of product mechanical properties.The result…
The continuous cooling transformation(CCT)curves of low carbon steel Q235(0. 15C,0.005B)with 1050℃30% deformation, holding 10,40,90s and cooling to 1000℃30% deformation then cooling with 5℃/s to 880℃ and cooling with1,5,15 and 25℃/s have been measured using dilatometry by Thermecmastor-Z thermal simulation machine. Wi…
Martensite stainless steel 2Cr13(0. 19C,12.88Cr)was melted by a vacuum non-consumable arc fumace and 0~0. 18% Ce was added in casting ingot.The morphology and ingredient of inclusion in steel was observed and analyzed by using optical and scanning electron microscope and X-ray energy dispersive spectrometer.Results sh…
The process of thin slab produced by FTSR(Flexible Thin Slab Rolling)process has been simulated by Gleeble-3500 thermal simulation machine,and the high temperature plasticities of slab of steel SS330(0.06%C)and steel SS400(0.20%C)600～1350 ℃ were tested,Results showed that the high temperature plasticity of steel SS400…
Flow field of molten steel in 230 mm x 2 000 mm concasting slab mould has been simulated by using commercial software Phoenics combined with water model test. The effect of process parameters such as effect of submerged nozzle bottom structure, immersion depth and outlet angle on wave amplitude of fluid surface and ef…
The temperature distribution curves at core, 1/2 radius and surface of the Φ35 mm round bar of 20CrMnTiH steel have been got by finite element simulating and situ temperature measuring to finishing rolled round steel bar during controlled cooling. Analysis results indicated that the temperature at surface of finished…
In 1985~2005, the patents of non-oriented electrical steel applied in China consist of 44 patents applied by abroad producers (main producers were JFE and Shin Nippon Seitetsu) and 48 patents applied by native producers (main producers were Baosteel and Wuhan Steel). The fields of patented technology of electrical ste…
The effect of hot rolled plate air cooling(800~850℃ to750℃)+ water cooling(750 ℃ to 300～180 ℃)two stage cooling mode and water cooling(782℃ to760℃)+ air cooling(760℃ to713 ℃)+ water cooling (713 ℃ to 414 ℃)three stage cooling mode on structure and mechanical properties of dual steel 0.08C,1.02Mn, 0.22Si,0.02Nb,0.01Ti…
The annealing test of 0.8 mm sheet cold rolled from 0.04C steel 3 mm bot rolled strip produced by CSP process has been carried out by 4- high rolling mill and tube funace with protective atmosphere in laboratory,and the tex- ture of annealed samples was analyzed by using etching pit method,while the annealed samples o…
The manufacture process of sheet of high silicon steel 0.02C,6.56Si,0. 14Mn,0.013P,0.004S, 0.02Al was melting by 25 kg vacuum induction furnace, forging breakdown,hot rolling to 1mm at 1050～850 ℃,warm rolling to 0.3 mm at 650℃,and cold rolling to 0.05 mm.The non-oriented silicon steel was got by vacuum annealing of th…
The composition of macro inclusion in 20MnTiB steel and 45 steel melting by 70 t EAF-LF-CC flow sheet at Egang and ingredient of mold powder and refractory material for concasting process have been analyzed,and it is obtained that the macro inclusion of steel is a composite inclusion which mainly consists of Al2O3MgO,…
The economic-technical indexes and application of a 30 t AOD unit at Pugang,40 t AOD units at Taiyuan Steel and a 120 t AOD unit at Shanghai Nol Steel in China are summarized. The development of AOD refining technology such as decarburization, desulphurization, replacing Ar with N2and top lance technology is presented…
A multi-field coupled analysis on temperature, structure and stress field of 0.21C- 1.03Cr-0.20Mo-0.03Nb gear steel cylinder in quenching process has been carried out by using FEM software MSC. Marc, combined with thermal elastic and plastic models and compiled sub programme. The results showed that the internal stres…