最新刊期
卷 26 ， 期 1 ， 2005
- 摘要：According to the solubility product theory of second phase in austenite, Ostward ripening theory, grain size control theory and precipitation strengthening theory, the probability for formation of inclusions in austenite and the inclusion size control have been theoretically analyzed and calculated. The results show that the manganese sulfide inclusion can be controlled to precipitate in austenite with size less than 100 nm while it is difficult at present condition for the alumina inclusions to completely precipitate in solid iron. It is obtained by analysis on the probability of control to reheating austenite grain size and producing precipitate strengthening effect by inclusions in steel that the manganese sulfide precipitated in solid iron can effectively prohibit austenite grain growth in heating and provide somewhat of precipitation strengthening effect.关键词：夹杂物, 尺寸控制, MnS;Al2O3 奥氏体2|0|0更新时间：2026-01-21
- 摘要：The phenomena of oxygen contamination from crucible materials on molten steel during vacuum melting has been studied by a 50 kg vacuum induction furnace with magnesia crucible and a 25 kg vacuum induction furnace with calcia crucible to reseach the basic law and main factors of oxygen contamination from crucible materials on molten steel. TTie results showed that avoiding oxygen contamination from crucible materials on molten steel during vacuum induction melting was key factor for deep deoxidization of molten steel in extra-low oxygen content range; in 0,5 ~ 10 Pa vacuum melting, with vacuum and temperature of molten steel in bath increasing the oxygen contamination from crucible materials on molten steel increased, and the final oxygen content in steel increased with carbon burning loss of molten steel increasing; the oxygen contamination of molten steel melting with magnesia crucible was more than that with calcia crucible.关键词：真空感应熔炼, 坩埚, 炉衬供氧2|0|0更新时间：2026-01-21
- 摘要：A new technology of high efficiency concasting based on inner-outer couple cooling of molten steel in a mould has been advanced that is to set an inner cooling apparatus- U shape pipes in a mould. The flow status of molten steel in mould with inner cooling apparatus is analyzed by using fluid dynamics analysis software FLUENT, and compared with without inner cooling apparatus. It is found that the inner cooling apparatus- U shape cooling pipes can make molten steel flow with a lower impact depth which is favourable to inclusion in steel floating up.关键词：内冷却器, 结晶器, 钢水流场;数值模拟2|0|0更新时间：2026-01-21
- 摘要：In accordance with optimum revamping of structure of mould copper plats for a 1400mm X 170mm slab con- caster, a numerical simulation for 3- dimensional temperature fields of mould copper plats with two kinds of copper plate and immersed nozzle structure parameters before and after revamping has been studied by finite difference control volume method ,The results obtained by simulation showed that the heat transfer effects of copper plate for wide face of mould obviously increased by optimum revamping with bolts gap modified from 160mm to 135mm and cooling water channel number modified from 65 to 55, with costing speed 1.4 m/min, at region nearby meniscus, the waximum temperature of inner and out curved wide face copper plate of mould after revamping respectively decreased by 15 ,^2 and 16 ,^0 as compared with that of mould before revamping.4|0|0更新时间：2026-01-21
- 摘要：The stress-strain curves and microstructure evolution o£ a microalloyed steel - 0.05C, 1.57Mn, 0.50Cu, 0.05Nb, 0.014Ti, 0.001 2B between 800 and 1 100 X. have been tested and studied by Gleebe-1500 hot simulator using single pass reduction test method, and based on the experimental results the grain size model and the critical strain of dynamic recrystallization have been established. It is obtained the grain size of the microalloyed steel shall be fined with decreasing of deformation temperature and increasing of deformation rate.2|0|0更新时间：2026-01-21
- 摘要：Based on multicomponent regression analysis, the model of prediction for end temperature of molten steel TLin CAS-composition adjustment by sealed argon bubbling refining has been established: TL= t -(-920.64 + 0.0643625X1+0. 187162X2+ 0.581293t +0.003662X3),where X1- molten steel laying aside time /min;X2- refining teated time/min; X3- amount of added alloy /kg; t- temperature of molten steel at beginning of treatment /℃. The re- sults of statistic analysis on prediction temperature showed that the hitting probability of prediction deviation of±5 ℃ and ±10 ℃ was 87% and 95% respectively.2|0|0更新时间：2026-01-21
- 摘要：The effect of Al2O3cylinder spinning thread speed on Al2Q inclusion dissolution velocity in refining slag - 4-10 MgO, 34-39 Al2O3), 33 ~ 42 CaO, 3 ~ 9 CaF28 SiQ21.3 - 8.7 SrO and the dissolution velocity constant of Al2O3in slag have been tested and studied by modified viscosity testing device. The results showed that to decrease the viscosity of refining slag and initial Al2O3content in slag were favourable to increase the Al2O3absorbability of refining slag.关键词：Al2O3-CaO Base Refining Slag, Al2O3 Inclusion, Absorption, Dynamics4|1|0更新时间：2026-01-21
- 摘要：The test of 8 pass cold extrusion of equal channel angular pressing (ECAP) with ratio of extrusion reduction 1.02 of each pass for 00Crl8Nil2 austenite stainless steel has been carried out. The results showed that the strength and hardness of steel increased obviously after two pass extrusion, then increased minor after third pass; due to interaction of slipping bands, with extrusion pass increasing, at 6th pass the slipping bands were separated into sub-grains which finally transformed into 300 nm new grain with large angular boundaries and at 8th pass 150 nm new grains occurred.2|0|0更新时间：2026-01-21
- 摘要：Based on the research on physical metallurgy prediction model including the model of austenite recrystallization in microstructure evolvement, carbo-nitride precipitation, and relation between austenite phase transformation and structure-properties during strip control rolling and cooling, the austenite grain size of 0.16C-0.06Si-l.30Mn steel simulated calculated by computer after 7 pass hot deformation between 1 173 K and 1 081 K by Gleeble-1500 hot simulator was 43μm, mile the actual-measured austenite grain size in structure of strip after 7 pass deformation was 38 μm，the relative error was 13% . Therefore the austenite recrystallization grain size simulated calculated by computer better conform to that of actual measured value.2|0|0更新时间：2026-01-21
- 摘要：To simulate compact strip production (CSP) technology, the effect of Nb-Ti on structure and mechanical properties of 400 MP and 460 MPa high strength weathering steel-0.060～0.076C,0.25～0.31Cu,0.45～0.56Cr 0.29~0.30Ni has been studied by 10 kg vacuum induction furnace melting and rolled into 6 mm plate. The results showed that yield strength o, and tensile strength oi, of steel contained 0.03% Ti were respectively 450 MPa and 545 MPa,o, snd og of steel contained 0.03%Nb-0.02% Ti were 550 MPa and 615 MPa,and c, and on of steel no-contained Nb and Ti were only 375 MPa and 480 MPa.The structure of 400 MPa weathering steels were ferrite + minor pearlite, and the main precipitates of steel contained Ti were CuS₂(20~25 nm)and TiN (80 nm);the structure of 460 MPa steel contained Nb-Ti was mainly granular bainite with precipitates CuS2 and(NbTi)CN(30~60 nm)therefore the strength of steel increased.关键词：高强度耐候钢, Nb;Ti ;微合金化2|0|0更新时间：2026-01-21
- 摘要：The steel H13(4Cr5MoSiV1)-0.32～0.45C,0.80~1.2Si,0.20~0.50Mn,4.75～5.50Cr,1.10~1.75Mo,0.80~1.20V is a hot-work die steel wide used for hot extrusion die and pressure casting die with service temperature up to 600 ℃.The surface low temperature thermo-chemical treatment including ion nitriding, nitrocarburizing, V- nitrocarburizing, sulpho-nitrocarburizing, oxy-sulpho-nitriding and multicomponent cementation to increase anti-thermal fatigue, thermo-wear abrasion and corrosion resistance is presented and the high energy density surface treatment including la- ser surface heat treatment, surface alloying with high energy density and surface modification with ion implantation and its development are reviewed in this paper.2|0|0更新时间：2026-01-21
- 摘要：The magnetic properties of electrical sheet steel including general(≤0.03%C,≤2%Si),oriented and nonoriented(~3%Si )steels increase mainly by steelmaking process- decreasing C(to ~0.003%),0 and N content and controlling inclusion in steel,rolling and heat treatment process. The development trend of electrical sheet steel is to simplify production procedure, use thin slab concasting continuous rolling process and strip casing process to produce electric steel. The history on production and development,curent production process and development of grade and metallurgical technology of electrical sheet steel are summarized in this paper.关键词：电工钢,冶金工艺;发展4|0|0更新时间：2026-01-21
- 摘要：A model for energy equilibrium in melting process of vacuum induction melting and the rational electric power supply regulation in each melting period have been derived and got by systematical analysis and calculation on power requirement and loss in melting process of 3 - 6 t vacuum induction furnace and on basis of electro- thermal equilibrium law of system. Hie results of melting 38 heats steel 300M (0.4C, 1, 1OMn, 1.64Si, 0.29Co, 1.85Ni, 0.4Mo) in 3 ~ 6 t vacuum induction furnace showed that after using optimum electric power supply regulation the electric consumption decreased by 41 kWh/t, the productivity increased by 8.3% , Mn and Cr yield increased by 1.6% and 0.25% respectively, and the service life of crucible increased obviously.5|0|0更新时间：2026-01-21
- 摘要：The peak value load of main electric power consumer such as steel works causes to waste electric power re- source, in short supply of mains power and to increase electric cost for consumer. The project of electric load demand side management (DSM)for Xigang Steel make the electric load(demand)to decrease by about 10%-5022 kW by using “tend analysis” principle and by means of adjusting and controlling the main equipment - electric arc furnace. It is a available way for electric load control (DSM)of main electric power consumer, economizing electric expense and alleviating the pressure of supplying power in city.关键词：钢厂, 负荷需求侧控制;趋势分析2|0|0更新时间：2026-01-21
- 摘要：By revamping to increase mould length and first cooling water flow rate, use active supply secondary water, automatic control of mould liquid level and mould electromagnetic stirring, the output per hour of 240 mm×240 mm concasting bloom increased to 84.67 t from original 64.73 t and casting speed increased to 1.0～1.1 m/min from 0.5～0.8 m/min. The casting steel grades were 0.2C steel bloom for tube,0.45C steel, steel for medium and low-pressure boiler tube, steel 40Cr and steel 20Cr etc. The maximum percentage up to standard for 0.20C steel casting bloom for tube in- creased to 80% in 2003 from 60% in 2002.关键词：240 mm×240mm 方坯;连铸, 高效化, 改造3|1|0更新时间：2026-01-21
- 摘要：The 30~40 mm medium plate of HQ590DB ultra-low carbon bainitic steel - 0.05C- 1.5Mn-0.04Nb- 0.02Ti-≤0.0002B has been pilot-produced by 180 t converter- RH - LF (Ca treated)- concasting slab:230(300)mmx1650mm×6000 mm-4300 mill controlled rolling and cooling process. [H] in concasting slab was 1.7×10-⁶,[O] 21 ×10~⁶ and[N]29×10-6.With controlled finishing rolling temperature between 800 and 850 ℃ and cooling temperature between 590 and 630 ℃, the structure of ferrite + lath bainite was obtained, the tensile strength σbof plate was 650～690 MPa, yield strength σ0.2490~590 MPa, elongation δ520%, and the plate has excellent formability.2|0|0更新时间：2026-01-21
- 摘要：The statistics data of charging structure as well as scrap, hot metal and electric pawer consumption per ton steel of two batches 1249 heats of a 50t arc furnace at Shijiazhuang Iron and Steel have been analyzed by using Statistics Package for Social Science (SPSS) software and iron-steel ratio to describe binary charging structure. The results showed that with charging iron-steel ratio increasing the electric power consumption per ton steel decreased. And the quantity relation between specific electric power consumption per ton steel (SEC)and iron-steel proportion (ISP)for two batches was obtained by curve regressive method, that is SEC= 402 e-0.59ISPfor first batch and SEC= 327 e-0.49ISPfor second batch, as iron-steel proprotein increased from 0.56 to 1. 11, the electric pawer consumption per ton steel decreased by 53 kWh/t.2|0|0更新时间：2026-01-21
- 摘要：Based on research of refining slag series by 55~75kg experimental ladle furnace (LF),the commercial production experiment of embedding are refining slag in a 60t ladle furnace has been carried out using three kind of slag:S1 slag-63.6~70.0 lime,22.7～25.0 high alumina and 5.0~13.6 fluorite; S2 slag-60.0~66.7 lime, 20.8～25.0 fluorite and 12.5～15.0 refractory block; and S3 slag-55.5～65.0 lime and 35.0～44.5 fluorite, and the refining steel grades were 20,20G,40Cr,35CrMoA and CCr15 steel. The results showed that all average desulphurization rate of molten steel using the three-slag series was 87%, and the average heat up rate of molten steel during LF refining was 3.84 ℃/min, 2.86 ℃/min and 2.48 ℃/min respectively by using S1, S2 and S3 slag series. As desulphurization speed was quick by using S1 slag therefore the refining time decreased.关键词：钢包炉, 精炼渣;脱硫, 升温速度2|0|0更新时间：2026-01-21
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