最新刊期
卷 29 ， 期 6 ， 2008
- 摘要：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 processing map for the steel has been established by using power dissipation map and working instability map for test steel in ferrite deformation area to get its processing safety area and instability area. Results showed that the area with deformation temperature 800 ~ 825 °C and strain rate 0. 02 ~ 0. 002 s-1was processing safety ferrite area for hot workability of the Ti-Nb IF steel.关键词：Ti-Nb IF Steel;Ferrite Area;Zener-Hollomon Factor;Flow Stress;Hot Processing Map2|0|0更新时间：2026-01-21
- 摘要：Numerical simulation on blooming and rolling process for U75V steel heavy rail with 280 mm×380 mm cast bloom has been carried out by ANSYS/LS-DYNA software to optimize C pass of knifing pass and analyze on stress dis- tribution of cross section of blooming heavy rail before and after optimization. Results show that with pass optimization,the equivalent stress of heavy rail during rolling decreases,the equivalent stress status of middle axle is improved,the fluctuation range of stress for original pass is9~44 MPa and that for optimized pass is 8~30 MPa,and the middle axle vertical maximum stress decreases to 21.1 MPa from 41.4 MPa with original pass.关键词：Finite Element Simulation;Heavy Rail;Blooming;Knifing Pass;Pass Optimization2|0|0更新时间：2026-01-21
-
Study and Application on Nitrogen Alloying Control Model for Stainless Steel Refining by AOD Process
摘要：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 accurately control N content in stainless steel by solubility of nitrogen and de-nitriding in AOD process and the data calculated by model nicely conformed to real measured data in production.关键词：AOD;Nitrogen Alloying;Controlling Model2|0|0更新时间：2026-01-21 - 摘要：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 relational expression between heat flux and height of mould. Results show that the distribution of copper plate temperature is similar to that of heat flux； the fluctuations of heat flux between loose and fix copper plate at center and edge of mould wide direction are respectively about 400 kW/m2and 200 kW/m2of which the differences of temperature are respectively about 30 °C and 20 °C.关键词：ASP Process;Mould;Temperature;Heat Flux3|0|0更新时间：2026-01-21
- 摘要：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 first brittle zone ≥1200'℃ and third brittle zone1000~800 ℃ was better than that of Nb-steel and Nb-V steel.It was indica- ted by scanning electron microscopy and energy spectrum analysis that Fe-Nb-C eutectic existed in cast billet of Nb- steel, and Fe-Nb eutectic existed in cast billet of Nb-V steel added V.关键词：Nb- V- Microalloying;High Carbon Steel;Hot Workability2|0|0更新时间：2026-01-21
- 摘要：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 concasting billet of GCr15 bearing steel has been carried out by using Gleeble 1500 thermal simulation machine with 6 pass at 1 150 ~910 ℃. Simulation test results showed that with accumulated deformation 82% , the grain size rating of samples was 6 with recrystallization ratio 91%. As increasing the percent reduction of Φ530 mm rolling mill to increase the accumulated deformation from 52% to 60% , the grain of Φ35 mm GCr15 bearing steel shall fine further.关键词：GCr15 Bearing Steel;Recrystallization;Control Rolling;Grain Size2|0|0更新时间：2026-01-21
- 摘要：With the rapid increasing stainless steel output in recent years,the demand for ferrochromium and metallic nickel continuously increased at home. The resource situation of ferrochromium mineral and nickel mineral in china and production process for carbon ferrochrome and nickel are analyzed,based on the scarcity status of domestic chromite and nickel ore,it is proposed that besides using overseas chromite resource, it is available to develop new process,exploit domestic chromite resource,fully utilize cheap chromite sand,and enhance comprehensive utilization research; and use new process to utilize nickel sulfde ore without or with minor noble-metal,and exploit laterite ore assuring supply of nickel resource.关键词：Stainless Stecl;Row Material Resource;Production Progress2|0|0更新时间：2026-01-21
- 摘要：Method,effect and function relation of static model and dynamic model for controlling end-point of converter steelmaking have been analyzed. According to the handicapped present situation of sensor for medium and small size converters,the comparison between optimal static model based on established GA-BP hybrid algorithm for predicting end-point of converter steelmaking and quasi-dynamic control model for predicting end-point of converter steelmaking has been compared from modeling principle,methodology and application effect. It is believed that prediction effect of a static model may be improved with GA-BP hybrid algorithm and the quasi-dynamic control model can reflect dynamic operation and the influence of operation in melting and charging process on first turndown time and end-point of converter steelmaking.关键词：Converter Steelmaking;End-point Controlling;BP Neural Network;Cenetic Algorithm2|0|0更新时间：2026-01-21
- 摘要：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 molten steel,thin film process,CVD process,powder-sintering rolling process,PCVD process and electrodeposition of molten salt electralytes is reviewed. It is pointed in this paper that at present the key research is to develop economic and high efficiency preparation technique.关键词：6.5%Si;硅钢片;制备工艺2|0|0更新时间：2026-01-21
- 摘要：The bar products of high C chromium bearing steel CCr15 are produced by 70 t Consteel EBT EAF-LF (VD)-CC process at Egang Co,Wuhan lron and Steel.The results showed that with controlling EAF end carbon ≥ 0.25%,using high basicity slag refining,so that[S]≤0.004%,T[O]0.0008%～0.0012%,the rating of A and B series inclusions in steel was respectively ≤1.20,of C series inclusions wasO and of D series inclusions was ≤0.5.关键词：Electric Arc Fumace;Bearing Steel;Quality Control2|0|0更新时间：2026-01-21
- 摘要：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 have been adopted including decreasing adding Al amount,controlling[Als]0.01%,feeding Ca-Si wire after RH,suitably increasing liquid steel temperature during cast,controlling liquid steel temperature 1520～1530 ℃ in tundish and stopper argon blown rate ≤10 L/min during casting,and controlling mold liquid level fluctuation ±3 mm.Application results showed that the hot rolled billet comer cracks rate decreased from original 23.57% to 1.21%.关键词：Steel 34Mn2V for High Pressure Bottle;Bloom;Rolled Billet Comer Cracks;Process Control2|0|0更新时间：2026-01-21
- 摘要：It was indicated by analysis on bulge-like inner overlap of Φ245 mm×12 mm casing tube of steel 26CrMo4V(0.26C,0.95Cr,0. 16Mo,0.07V)that the defects distributed random at the same side of inner wall and there was Si-Mn-Fe compound oxide layer in overlap.It was considered that the bonding of eccentric shrinkage cavity in cast bloom was prevented in piercing by the stable oxide layer which formed at inner wall of eccentric shrinkage cavity,and the inner overlap defects formed at action of combined shear and tensile strains during piercing.With the technology measures such as lower overheating of liquid steel,weak secondary water cooling and controlling casting speed,the reject ratio of tube with inner overlap decreased to 5.95% from original 15.43%.关键词：Steel 26CrMo4V;Casing Tube;Inner Overlap;Concasting Technology5|0|0更新时间：2026-01-21
- 摘要：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 controlling LD tapping [C] 0. 03% 〜0.04% , RH vacuum decarburizing to 0. 002 5% C, adding FeP before RH decarburizing, LF secondary refining desulphurizing and RH-LF adjusting Als ； the produced slab of W600 steel had even analyses and the mechanical properties met the technical requirement.关键词：W600 Non-Oriented Silicon Steel;LD;RH;LF;Analyses Control2|0|0更新时间：2026-01-21
- 摘要：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 hardware configuration.关键词：钢水样本;成分分析;数据传送;二次软件开发4|0|0更新时间：2026-01-21
- 摘要：Bearing steel GCr15 is produced by 100 t high impedance UHP EAF steelmaking - 100 t ladle furnace refining - 5 strand 150 mm×150 mm billet concasting - continuous rolling process at Nanjing lron and Steel Co Ltd. The statistic results of bearing steel CCr15 production data showed that with charging 55%～70% hot metal,controlling end point carbon 0.22%～0.24%,phosphorus 0.004%～0.006% and sulphur 0.040%～0.043% in liquid steel at EAF tapping,ladle refining by slag(%:53~58CaO,13～16SiO215~20Al2O33~5MgO)with basicity2.3~3.3 and whole period Ar stiring,67 Pa VD treating≥20 min,concasting with shiclding practice in whole period,the average oxygen con- tent in bearing steel CCr15 after VD treatment was 10×10-6and the lowest oxygen content in cast billet was 7×10-6.关键词：GCr15轴承钢;EAF-LF(VD)-CC; 氧含量3|0|0更新时间：2026-01-21
- 摘要：The surface micro cracks of 25 mm hot rolled plate rolled by cast slab of C-Mn steel(0.13～0.20C, 1.00~1.60Mn,0.09Cu,0.07As,0.05Sn)have been studied by scanning electron microscope and X-ray energy dispersive spectrometer.Results showed that there was thin oxidizing-decarburizing layer at both sides of surface crack,the crack fractured along grain-boundary and the low-melting-point Cu-As-Sn enriched phases existed at steel matrix near crack.In production practice,as Cu,As,Sn content in steel was respectively controlled ≤0.02%,the surface net cracks of hot rolled plate were basically eliminated.关键词：Cu、As、Sn;C-Mn钢;热轧板;表面裂纹;低熔富集相2|0|0更新时间：2026-01-21
- 摘要：Mathematic model for catch carbon practice of steelmaking medium and high carbon steel in a 70 t arc furnace has been established. According to the requirement of carbon content in liquid steel at tapping, based on the chemical compositions of charged scrap and hot metal, the blowing parameters of ultrasonic coherent jet oxygen lance are controlled suitably to use consumable oxygen-carbon lance at door and the available slag basicity is used to carry out aim catch carbon practice. The steelmaking practice of 0. 55% C steel showed that with charged 30% hot metal, the proportion of heats with arc furnace end point [C] 0. 40% ~ 0. 65% was N85% to obviously decrease steel melting cost.关键词：电弧炉;热装铁水;超音速集束氧枪;留碳操作2|0|0更新时间：2026-01-21
- 摘要：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 550～900 ℃ on HV1 hardness value of the non-oriented electrical steel and effect of stress-relief annealing at 680~800 ℃ on magnetic properties of the steel were tested. For the finished semi-process non-oriented electrical steel products with coating annealed at 650~700 ℃,the core losses of designation B50A700T and designation B50A1300T stress-annealed at 750 ℃ for 2 h were 4.10 W/kg and 4.70 W/kg respectively.关键词：Coating;Semi-process;Electric Steel;Annealing2|0|0更新时间：2026-01-21
- 摘要：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 simulation machine. The microstructure of steel DB590 air-cooled(3 ℃/s)after rolling was bainite + ferrite matrix,the mechanical properties of plate were tensile strength 645 MPa,yield strength 471 MPa,elongation 32%,impact energy at 0 ℃ 94 J with excellent cold-bending property.关键词：Air-cooled Low Carbon Bainitic Steel;Microstructure;Properties5|0|0更新时间：2026-01-21
- 摘要：The cast bloom size for U75V heavy rail steel is 280 mm×380 mm,and the heavy rail products are produced with 14 passes rough rolling(BD1)- medium rolling(BD2)and CCS 6 passes finishing rolling(UR1ER,UR2UR3EF,UF).The interlamellar spacing of pearlite in heavy rail steel at different pass was measured by scanning electron microscope. Measured results showed that with increasing deformation(reduction ratio of sectional area)of BDIE,BD2B, UR and UF pass of heavy steel,the interlamellar spacing of pearlite in heavy rail section of head,web,track bottom and leg decreased respectively to 0.293 μm,0.269 μm,0.253 μm and 0.229 μm from original0.512 μm,0.414 μm, 0.493 μm and 0.452 μm as a result to obviously increase mechanical properties of heavy rail.关键词：U75V Heavy Rail Steel;Continuous Rolling;Deformation;Interlamellar Spacing of Pearlite7|0|0更新时间：2026-01-21
- 摘要：Influence of0~0.89% Nb content on structure and mechanical properties of quenched(1000~1200 ℃) - tempered(200~650℃)steel Cr8WMo2V2SiNb has been studied. Results showed that with increasing Nb content the as-cast structure and eutectic carbide morphology improved,the amount of refractory carbides increased remarkably to restrain the growth of austenite grain; and the quenching temperature of steel could appropriately increased by adding Nb to increase secondary hardening ability and wear resistance and get higher integrated mechanical properties of steel.关键词：铌;Cr8WMo2V2SiNb钢;组织;二次硬化;力学性能2|0|0更新时间：2026-01-21
- 摘要：The test results showed that with increasing normalizing temperature from 850 ℃ to1100 ℃,the average grain size of 2.5 mm hot rolled plate of 0.005C-3.0Si non-oriented electric steel increased from 60 μm to 200 μm,and with normalizing at 1000 ℃ for hot rolled plate,the grain size of 0.5 mm cold rolled sheet annealed at 850 ℃+950 ℃ was maximum to 105 μm; with increasing normalizing temperature of hot rolled plate,the{111},{112} and{114}tex ture in annealed cold rolled sheet obviously weakened and the{100|texture was enhanced. The optimum normalizing temperature of hot rolled plate was 900~1050 ℃,with which the iron loss of the electric steel was lowest.关键词：3.0Si Electric Steel;Non-Oriented;Normalizing;Structure;Magnetic Properties2|0|0更新时间：2026-01-21
- 摘要：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 comprehensive mechanical properties- tensile strength ≥400 MPa,elongation 34.5%,work-hardening exponent n 0.26 and plastic strain ratio r 1. 1;and with electro backscattering diffraction(EBSD)analysis it was obtained that the most{111} orientation was obtained as cold rolled sheet annealed at 850 ℃ and the steel recrystallized completely.关键词：Ferritic Stainless Steel;Annealing Process;Mechanical Properties;Orientation Distribution2|0|0更新时间：2026-01-21
- Technical support is provided by Beijing Founder electronics co., LTD 鄂ICP备2022000839号
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
- Total Visits：35684
0