Materials Literature
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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…
The numerical simulation of fluid field of 70L steel(0.70C)in 280×380×800(mm)mold and molten steel flowage at inner of two-side bole immersed nozzle structure with casting speed 0.8 m/min have been caried out by commercial software CFX4.4.The results showed that as side hole inclination was 10°and 20°,there was second…
The structure evolution of pearlite and overcooling austenite of 0.75C eutectoid carbon steel during com- pression has been studied by Gleeble 2000 and 1500 thermal simulation machines.The test results showed that as sample heated with 10 ℃/s to700 ℃ for 3 min than carried out 60% reduction,the lamellar pearlite in st…
Test low carbon bainitic steel (0.042～0.045C,1.43～1.47Mn,1.0～2.5Cu,0.29 ～0.30Mo, 0.025~0.029Nb,0.011~0.018Ti,0.0013~0.0023B) was melted by a 50kg vacuum induction furnace. Teat results showed that with increasing Cu content from 1.0% to2.5%,the precipitation speed of e-Cu in steel and the peak hardness increased; and…
The macrosegregation law of C,S,P and Al in 240 mm×240 mm cast billet of steel 40Cr(0.38 ~ 0.40C,0.90~0.91Cr,0.015～0.029P,0.009~0.014S)has been studied by the technology of original position statistic distribution analysis(OPA).The study indicated that with 45%～63% equiaxial crystal rate in billet, there has not any e…
The effect of rolling parameters such as 35.0%~52.0% reduction rate in recrystallization region,60.2% ~70.3% reduction rate in non-recrystallization region, cooling rate(20～38 ℃/s)on structure and mechanical properties of0.06C-0.31Mo V-Nb-Ti-B microalloying steel has been studied by Cleeble thermal simulation machine.…
Traditional process to produce electrode of alloy steel 30CrMnSiA1.2 t ESR ingot at Daye Special Steel is EAF+LF-rolling250 mm×250 mm Billet,by which the crack easily produced at top of ESR ingot.With using optimum process to produced ESR electrode:EAF+LF(VD)steelmaking-φ320 mm cast round electrode,controlling≤0.003Pb…