最新刊期
卷 28 ， 期 5 ， 2007
- 摘要：The numerical simulation of jet flow field of inner and out of Laval tube has been carried out by commercial software CFX4. 4, and the fluid flow distribution of axis symmetry turbulence jet out of tube with different stagnation pressure was analyzed to verify the k-ε turbulence model. Results showed that at environment temperature 300 K, the cross section area of jet flow was obviously influenced by the distance from cross section to jet nozzle, but with different stagnation pressure (0.596~0.996 MPa) the change of jet flow expanding along radial was minor ； and with same stagnation pressure the jet flow expanding along radial obviously increased.关键词：Single Hole Oxygen Lance;Laval Tube;Axis Symmetry Turbulence Jet;Numerical Simulation2|0|0更新时间：2026-01-21
- 摘要：The structure and properties of GCr4 bearing steel- 1.00%C,0.40%Cr,0.03%Mo,0.034%Al,10 × 10-6[O] heat treated by cross section induction heating and quenching (840±10)℃ + tempering (150～160 ℃) have been tested and researched. Results showed that after heat treated the case structure of CCr4 steel consisted of twinned martensite and dislocation martensite,and the core structure was troostite + sorbite. The hardenability of GCr4 steel(J60, 3.0 mm)was markedly lower than that of GCr15 bearing steel- 1.01%C,1.52%Cr,11×10-6[O] ( J60,4.5 mm),the impact toughness and fracture toughness Kc of GCr4 steel increased respectively by 66%～104% and 67% as compared with that of steel GCr15 heat treated by(840±10)℃ quenching +(150~160)℃ tempering , and the contact fatigue life of steel GCr4 increased by 12%～26% as compared with that of steel CCr15.关键词：Restricted Hardenability GCr4 Bearing Steel;Structure;Impact Toughness;Fracture Toughness;Contact Fatigue Life2|0|0更新时间：2026-01-21
- 摘要：The nitrogen removal from 0. 02% C molten steel in argon direct current (DC) glow plasma has been tested by a 25 kg vacuum induction furnace and the effect of argon glow plasma on kinetics of nitrogen removal from molten steel was studied. Results showed that the nitrogen removal speed and efficiency from molten steel in argon glow plasma were obviously better than that in vacuum, as oxygen content in molten steel was 180 x 10-6in argon glow plasma the nitrogen content in molten steel could decrease to 9 x 10-6. The effect of argon glow plasma on nitrogen removal from molten steel was embodied in interface chemical reaction to provide the kinetics condition for accelerating nitrogen removal reaction.关键词：Argon DC Glow Plasma;Low Carbon Molten Steel;Nitrogen Removal2|0|0更新时间：2026-01-21
- 摘要：The plane-strain compression test with strain rate 10 s-1 and 50 s-1 at 900~1200 ℃ for forged dual phase stainless steel 00Cr22Ni5Mo3N has been carried out by Gleeble 3800 simulation test machine.Test results showed that with increasing deformation temperature the peak resistance to deformation of the dual phase steel abruptly decreased and as the strain rate increased from 10 s-1 to 50 s-1 the peak stress of dual phase steel increased by 40～60 MPa; with deformation at 1000~1200 ℃ the recovery and recrystallization of ferrite structure in steel occurred where austenite partially softened by accumulation of dislocation and formation of subgrain boundary.关键词：Dual Phase Steel 00Cr22Ni5Mo3N;High Stain-Rate;Peak Stress;Recovery;Recrystallization2|0|0更新时间：2026-01-21
- 摘要：According to production condition of an 180 t oxygen converter, the hydraulic simulation test of 1/15 model of oxygen top blown converter has been carried to get the effect of blown process parameters on bath. Results showed that as top blown gas flow rate was m 15.5 m3/h the change of oxygen lance position and gas flow rate have little influence on mixed time of bath； with lowering top lance position and increasing top blown gas flow rate the splash amount of bath increased ；and as gas flowing rate was 16.0 m3/h, the splash amount of bath was larger.关键词：Oxygen Converter;Top Lance Flow Rate of Gas;Lance Position;Mixed Time;Impact Depth2|0|0更新时间：2026-01-21
- 摘要：The behavior,characteristics,amount and transformation of microinclusion in bearing steel at each procedure of 45t BOF-LF-VD-CC flow sheet at Shijiazhuang Steel have been studied by added tracer elements.Results showed that inclusions in steel before LF refining were gradually transformed from blocky Al2O3chromic-silicate and chromic-manganate to calcium chromate,globular chromic-silicate and banding chromic-manganate inclusions in cast billet; and the average number of micro-inclusions in steel decreased from 8.74/mm² before LF to 2.72/mm² in billet while the size of inclusions also decreased.关键词：BOF-LF-VD-CC Process;Bearing Steel;Micro Inclusion2|0|0更新时间：2026-01-21
- 摘要：The normalized 2.2 mm plate of non-oriented silicon electric steel(0.004C,3.1Si,0.33Al)was rolled to 0.5 mm sheet by asynchronous rolling process with a rate of 1.19,and the evolution of asynchronous cold rolling texture in thickness direction was investigated quantitatively by orientation distribution function (ODF) mehtod. Results showed that there was an obvious change of texture in thickness direction of normalized plate of non-oriented silicon electric steel:the anti-Gaussian texture was stronger close to center of thickness which was kept even after asynchronous cold rolling,but the Gaussian texture at surface and sub-surface of sheet disappeared after cold rolling; there was no change of texture type along slow and fast roller side,but the intensity of texture changed obviously; the distribution of asynchronous cold rolling texture was non-symmetric; the anti-Caussian texture in slow roller side was higher than that in fast roller side,the{111}〈112〉texture was low at center and high at sides which at slow roller side was little higher than that at fast roller side.关键词：Asynchronous Rolling;Non-Oriented Silicon Steel;Texture;Orientation Distribution Function3|0|0更新时间：2026-01-21
- 摘要：BP ( Back Propagation) algorithm and genetic algorithm are combined into hybrid genetic algorithm of which the algorithm steps are first to locate a favorable searching region by genetic algorithm, then to search optimal coefficients in the located region by BP algorithm. An 100 t arc furnace end aim temperature neural network predictive model is trained respectively by genetic algorithm and hybrid genetic algorithm in this paper. The simulation results show that the hybrid genetic algonthm has faster convergence speed and higher predictive precision, as aim temperature precision is ± 2 ℃ , ±4 ℃ , ±6 ℃ and ± 8 ℃ , the percentage of hits for aim temperature by standard genetic algorithm is respectively 75% , 82% , 86% and 92% while that by hybrid genetic algorithm is respectively 80% ,88% ,90% and 96%.关键词：Hybrid Genetic Algorithm;Neural Network;Predictive Model;Arc Furnace;End Aim Temperature2|0|0更新时间：2026-01-21
- 摘要：The controlled rolling and cooling test for a V-Nb-Ti microalloying X100 pipeline steel(0.057C,1.84Mn, 0.25Mo) has been caried out by φ350 mm 4 roll mill in laboratory.Results showed that with initial rolling temperature 1100 ℃,finishing temperature 800~900 ℃ and end cooling temperature 100～400 ℃ the structure of X100 steel was acicular ferrite + granular bainite-lower bainite; and with decreasing finishing temperature,the structure fined and strength of steel increased,with decreasing end cooling temperature the strength increased but the toughness of steel decreased. The optimum hot rolling process for X100 pipeline steel is finishing temperature 850 ℃ with end cooling temperature 200 ℃.关键词：X100 Pipeline Steel;Controlled Rolling and Cooling Process;Structure;Mechanical Properties2|0|0更新时间：2026-01-21
- 摘要：The bubbles movement behavior in mold with cast speed 1.1 m/min,nozzle submerged depth 160 mm and gas flow rate in nozzle 0～15 L/min,and the effect of bubbles movement on impact depth,liquid level fluctuation and surface naked of mold powder have been studied by physical model in the ratio 0.4 to 1300 mm × 230 mm slab mold. Test results showed that with increasing gas flow rate in nozzle all the amount and size of bubbles in mold increased,the bubbles horizontal dispersion in liquid steel enlarged and the bubbles maximum penetration depth increased; as the gas flow rate in nozzle increased to 5 L/min,the flow pattern of gas bubbles at liquid surface changed from all movement towards nozzle to dispersion movement at the concentration escape position.关键词：Mold for Slab;Submersed Entry Nozzle;Gas Bubble Movement Behavior;Physical Model2|0|0更新时间：2026-01-21
- 摘要：The two- and three-dimensional models of 12 pass continuous rolling process for 150 mm × 150 mm billet to φ32 mm rod have been established by commercial finite element software MSC .Marc,and the simulation results of cross section shape,temperature of rolling stock during rolling process by two- and three-dimensional models were compared. Results showed that as compared with that calculated by three dimensional model,the width spread of cross section calculated by two-dimensional model is larger but by which the computational efficiency is high and the temperature curves were close to that calculated by three dimensional model; the three dimensional simulation on given process parameter was more accurate than two dimensional simulation; the simulated value of exit rolling speed and temperature obtained by simulation agreed with experimental value.关键词：Rod of Bearing Steel CCr15;Continuous Rolling;Two-and Three-Dimensional Numeric Simulation2|0|0更新时间：2026-01-21
- 摘要：According to characteristics of electroslag remelting (ESR) of steel, the unsteady-state model for ESR slab ingot has been established to simulate the temperature field of slab ingot during ESR with different remelting speed and analyze the effect factors on metal pool depth. Simulation results showed that during remelting of 20 t slab ingot with cross-section size 400 mm x 2 000 mm and remelting speed 3~5 mm/min, with increasing remelting speed the depth of metal pool increased and as height of remelted ingot was about up to double of ingot thickness the system was in quasi-steady state then the depth of metal pool was unchanging.关键词：Electroslag Remelting;Slab Ingot;Temperature Field;Quasi-Steady Model;Metal Pool3|0|0更新时间：2026-01-21
- 摘要：The wear properties and wear surface morphology of three kinds of plastic die steel STAVAX (0.37C, 13.40Cr,0.31V), M330 (0.36C,12.88Cr,0.15Mo) and N702 (0.05C,16.30Cr,4.00Cu,4.00Ni,0.34Nb)with excellent corrosion resistance have been studied by M200 ring-block wear testing machine and scanning clectron micro-scope.Results showed that HRC value of quenched and tempered STAVAX,M330 and N702 steel was respectively 55,53 and 44,and width of wear coat was respectively 2.61 mm,2.74 mm and 7.4l mm; structure of STAVAX steel and M330 steel was matrix + fine spherical carbide and had higher wear resistance,while the matrix of N702 steel was relatively soft and there wasn't second phase - carbide precipitation which had lower wearing resistance,during testing the matrix was easily worm to form a lot of fatigue crack led to block and lamella weaing off.关键词：Corrosion Resistant Plastic Die Steel;Carbide;Surface Hardness;Wear Resistance3|0|0更新时间：2026-01-21
- 摘要：The modified containing tungsten added V-N microalloying Cr5W tool steel-0.70～0.90C，≤1.00Si，0.20~0.60Mn，4.50~5.50Cr，1.00~1.50W，≤0.15Mo，≤0.3V，300×10-6～350×10-6N has been developed. Test results indicated that the structure of modified Cr5W steel quenched at 960 ℃ was martensite + carbide,of which the average HRC hardness was 63.5,and the average HRC hardness of modified Cr5W steel after temper at 180 ℃ was 63.2 higher than hardness(average HRC 62.3)of 180 ℃ tempered Cr5 steel(0.70~0.90C，≤1.00Si，0.20～0.60Mn，4.50~5.50Cr，0.15~0.70Mo，with 80×10-6～120×10-6N);and with same hardness value the relative wearing resistance of modified Cr5W steel increased by 50% as compared with that of Cr5 steel.关键词：Modified Cr5W Steel;Tungsten;Cold Rolling Working Roll;V-N Microalloying2|0|0更新时间：2026-01-21
- 摘要：Mathematical model for Nb( C ,N) precipitation in ferrite of micro niobium HSLA steel and calculated NbC nucleation radius, nucleation rate and growth rate in ferrite with 900 ~ 1200 ℃. austenization are presented. The test results by some authors indicated the precipitation of niobium carbo-nitride needed higher dislocation density and the amount of NbC formed in ferrite was relatively minor as compared with that formed in austenite； and the tensile strength of steel sheet with coiled at 680 °C was obviously higher than that of sheet without coiled direct cooling to room temperature.关键词：HSLA Steel;Ferrite;Niobium;Precipitation Strengthening2|0|0更新时间：2026-01-21
- 摘要：LF (ladle furnace)refining is a key metallurgical process for steelmaking cold rolled low carbon steel in BOF-LF-CSP flow sheet. The electric characteristics of a 120 t LF with 20 MW transformer and the power supply curves have been studied and optimized by established optimizing model to decrease refining time and improve refining effect. Results show that with different voltage level the maximum heating up of LF at Handan Steel is from 1.45 ℃/min to 5.14 ℃/min;and with third voltage level(302 V)the heating up speed shall be increased from 4.01 ℃/min at present to4.58 ℃/min.关键词：LF;Power Supply Curves;Optimization2|0|0更新时间：2026-01-21
- 摘要：An excellent arithmetic for flow rate control - expert and alterable parameter PID control arithmetic has been developed by combining theory with practice to realize optimal control for bottom blowing flow rate. The practical application of 30 ~ 120 t top and bottom combined blown converter indicated that the expert and alterable parameter PID control technique had nice control performance i. e. smooth and quick to control bottom blowing flow rate curves, precisely modify flow rate, effectively prevent bottom lance blocking and obviously increase economic benefit.关键词：Top and Bottom Combined Blown Converter;Bottom Blowing Flow Rate Control;Expert and Alterable Parameter;PID Control2|0|0更新时间：2026-01-21
- 摘要：A charge partition model for stainless steel smelting by K-OBM-S process at Taiyuan Steel has been established by a linear programming method including 13 decision variables in the model, minimum cost charge partition selected to be objective function and a set of linear equality and inequality about variable as restricted introduction, and to solve the problem of linear programming by Simplex Method. Calculated results showed that at given conditions, according to charge partition of stainless steel S0Cr18Ni9 smelting by established math model, the total cost per ton steel decreased by 10%.关键词：Stainless Steel;K-OBM-S Process;Model;Charge Partition2|0|0更新时间：2026-01-21
- 摘要：The non-quenched and tempered steel 36Mn2V (0.34～0.38C,1.45～1.70Mn, 0.11～0. 16V, 0.020Als)was produced by hot metal pretreated -120 t converter melting -predeoxidizing by Pl deoxidizing agent with main component CaC2then alloying-LF + RH refining-280 mm × 380 mm billet concasting process at Panzhihua Steel. The analysis and examination results showed that the average yield of alloy element Si,Mn and V was respectively 85.8%, 98.0% and 96.0%,and the T[O] of 140 mm round tube billet was 6.4×10-6～13.0×10-6(average 9.1×10-6),the [N] was 28.0×10-6～59.0×10-6and the metallurgical quality of tube billet all met to the requirement of technical standard.关键词：N80 Grade Non-Quenched and Tempered Steel;Tube Blank;Converter;LF + RH2|0|0更新时间：2026-01-21
- 关键词：CSP Cold Rolling Sheet;Bell Type Fumace;Annealing;Sticking2|0|0更新时间：2026-01-21
- 摘要：The effect of magnetic stirring current on carbon segregation of 180 mm×180 mm cast billet of gear steel 20CrMnTiHl and the effect of change of residual B content in steel during refining and casting on hardenability of steel have been tested and analyzed. Results showed that as magnetic stiring current decreased from 200 A to 100 A,the carbon segregation index of cast billet decreased by 0.1;with controlling residual B in 20CrMnTiHl steel≤0.0002%,the hardenability band width of steel was ≤ 4 HRC.关键词：Gear Steel 20CrMnTiH1;Residual B;Carbon Segregation;Hardenability2|0|0更新时间：2026-01-21
- 摘要：The process of 100t DCEAF+LF+VD-220 mm×220 mm continuous billet -rolling mill to rollφ 55～70 mm GCr15 bearing steel bar has been developed. Process test results showed that with overheating temperature of molten steel during continuous casting ≤35 ℃,heating time of 220 mm×220 mm billet ≥8 h,rolling reduction 12.58~ 20.38,the central porosity rating of φ55～70 mm finished rolled products of CCr15 bearing steel was ≤1.5,the banded structure rating≤1.5 to meet the requirement of standard GB/T18254-2002.关键词：GCr15 Bearing Steel;Continuous Casting;Rolling;Central Porosity2|0|0更新时间：2026-01-21
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