最新刊期
卷 28 ， 期 2 ， 2007
- 摘要：Based on measured data of steel plate rolled by single stand 2500 four high reversing mill, the prediction model for front end bending behavior has been established by artificial neural network method. Results showed that artificial neural network calculated value of plate front end bending during rolling conformed to measured value ； as temperature difference between top and bottom surface of rolling work piece was higher, the temperature difference, deformation zone shape characteristic and deformation extent were main factors to effect rolling work piece front end bending. For heavy plate products, decreasing pass reduction could decrease bending, and for thin plate, increasing pass reduction could decrease bending.3|0|0更新时间：2026-01-21
- 摘要：The factors to effect change of free height of steel 44Si2CrV spring during long time loading for 72 h under stress to be lower than yield strength of steel has been studied. The results show that the reduction of free height of steel 44Si2CrV spring under compressive stress 900 MPa consists of two parts: plastic deformation of surface decarburized zone to hinder elastically deformed internal material recovering, making up 84% of total reduction of free height and creep of steel at ambient temperature making up 16% of total reduction of free height.2|0|0更新时间：2026-01-21
- 摘要：The research of effect of carbon powder, ferrosilicon (75% Si) powder and silicon carbide powder on scheelite (67. 25% W03) powder reduction kinetics has been carried out by 15 kW carbon tube furnace in laboratory. The results showed that scheelite reduced by carbon was second order reaction and the apparent activation energy was 234. 6 kj/mol; the reactivity of carbon was poor at low temperature, but its reaction rate increased obviously at temperature up to 1 400 ℃. The reactivity of ferrosilicon was steady with increasing temperature, and reaction product was SiO2to increase slag amount. The reactivity o£ silicon carbide was good at temperature N1 400 ℃. Carbon and ferrosilicon are available for low alloying ratio (3%W) and silicon carbide is suitable for higher alloying ratio (N5%W).关键词：白钨矿;碳;硅铁;碳化硅;还原动力学2|0|0更新时间：2026-01-21
- 摘要：150~350 nm super finc grain structure of φ8 mm round stainless steel 00Cr19Ni10-0.025C,18.75Cr, 10.96Ni has been obtained by 8 pass equal channel angular pressing(ECAP)with extrusion speed 9 mm/s at 700 ℃.The structure evolution of steel in ECAP was analyzed by optical microscope,scanning and transmission electron microscope and X-ray diffraction method. The grain refinement mechanism - dislocation,twins and dynamic recrystallization is proposed and the research discovers that the twins is main grain refining mechanism in 1～4 pass and the dynamic recrystallization is main refining mechanism in 5~8 pass.关键词：等通道热挤压法;奥氏体不锈钢;晶粒细化机理2|0|0更新时间：2026-01-21
- 摘要：The effect of non-sinusoidal oscillation amplitude on liquid friction force in mold with casting speed 2. 0 m/min has been analyzed by a mathematical model of liquid friction combined a non-sinusoidal oscillation waveform with optimum mode virtue to get amplitude selection principle and determination method. The calculated results for 1 270 mm x 210 mm cast bloom of SPHC steel (≤0. 08C) showed that the maximum liquid friction force could be restricted by applied small amplitude, increased flux consumption, decreased negative strip time, and defined optimum amplitude ± 4 mm at cast speed 2. 0 m/min； and amplitude should be increased suitably with increasing cast speed in order to improve oscillation effect at real time.关键词：连铸结晶器;非正弦振动;振幅;液体摩擦力;保护渣膜3|0|0更新时间：2026-01-21
- 摘要：Effect of process factors oxygen supply rate and lance level on bath stirring, spitting and penetrating depth for 300 t converter melting has been simulated and studied by 1 • 13 water model. The water model test results showed that as Fr was controlled within 113. 1 and lance level was maintained at 0. 167 m (corresponding 300 t converter lance level 2. 17 m), mixing time of bath reduced, spitting decreased during blowing, and better bath stirring effect was got with shallow penetrating depth to be available to decrease impact strength on furnace bottom.关键词：转炉;水力学模型;吹炼2|0|0更新时间：2026-01-21
- 摘要：Precipitated phases,precipitated temperature and each phase content in SA508-3 steel -0. 19C,0.01~ 0.22Si,1.40~1.58Mn,0.65~0.76Ni,0.50～0.55Mo have been calculated by using Thermo-Calc thermodynamic soft- ware,and effect of Si and Mn-Ni-Mo content on precipitated phases in the steel was studied. The calculated results show that main equilibrium precipitates in SA508-3 steel are alloying cementite,M,C₃ and Mo carbide. There is no obvious effect of Si content change on precipitated temperature and precipitated amount of each phase. With increasing Mo content the brittle precipitated phases decreased while there is not obvious effect on alloying cementite precipitates. The optimum tempering temperature for SA508-3 steel is 643~678℃.关键词：SA508-3 钢;析出相;热力学计算2|0|0更新时间：2026-01-21
- 摘要：Influence of 0~6% BaO content on melting temperature, crystalline temperature and rate of mould pow- der with main ingredient 31.60CaO,27.20SiO₂,10.48C,4.85Al2O3and basicity 1.16 for casting Q235B, SS400 etc medium carbon steels by CSP flow sheet at Baotou Steel has been studied. Test results showed that added ≤2% BaO in test mould powder was available to improve lubricant and vitreous performance of flux and restraine precipitation of crystals, and as BaO content was ≥4%, the precipitation of crystals was completely restrained to get optimizing vitreous flux films.关键词：BaO, 结晶器保护渣, 润滑, 控制传热2|0|0更新时间：2026-01-21
- 摘要：Structure and mechanical properties of Co-Ni-Cr-Mo secondary hardening ultra-high strength steel 0. 16C, 11.0Ni,2.0Cr,3.0Mo,14.0Co melted by a 25 kg induction furnace and aged at 460~580 ℃ have been studied. Test results showed that with 860 ℃ quenching + cold treatment at -73 ℃+ aging at 480 ℃,there was large amount dispersed acicular M(Co,Mo)2C precipitates in structure of steel, yield strength Rp0.2of steel was up to maximum value 1685 MPa, impact energy Akvwas 20 J; with overaged condition at 550 ℃,as amount of reverse transformation austenite at lath boundary obviously increased,Akvincreased to 32 J and Rp0.2decreased to 1320 MPa.关键词： 14Co- 11Ni-2Cr-3Mo 超高强度钢,时效温度, 组织性能2|0|0更新时间：2026-01-21
- 摘要：The deformation resistance of niobium steel 0. 05C, 1. 44Mn, 0. 13Nb with austenite grain size 800 μm during control rolling at 900 ~ 1 050 °C with deformation rate 1 ~ 20 s ~ and true strain 0 -0. 7 has been studied by Thermecomaster-Z thermal simulation test machine, and a regression equation for deformation resistance is established. Test results showed that with increasing temperature, deformation resistance of niobium steel in austenite region decreased, at same temperature with increasing straining, deformation resistance of steel increased, and at given straining deformation resistance increased with increasing deformation rate. The difference in deformation resistance between calculation value by regression equation and measured value was W5 MPa.关键词：铌钢;奥氏体;热轧参数;变形抗力;数学模型2|0|0更新时间：2026-01-21
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Effect of Heat Treatment on Structure and Properties of Low Alloying Ultra-high Strength Steel DT300
摘要：Martensite transformation and s- carbide precipitation in the steel DT300 -0.33C,1.78Si,0.76Mn, 5.78Ni,1. 10Cr,0.65Mo,0. 12V oil quenched at 840~960 ℃ and effect of quenching temperature on mechanical properties of 300 ℃ tempered steel have been tested and analyzed. Results showed that complete lath martensite and excellent strength-toughness of steel DT300 were obtained by 860~920 ℃1 h oil cooling + 300 ℃ 2 h tempering. The mechanical properties of heat-treated steel were Rm 1860 MPa, Rp0.21500 MPa,A 12% and Aku258 J.4|0|0更新时间：2026-01-21 - 摘要：The temperature of hot strip at finishing rolling interstand has been calculated by established short-cut calculation model and defined concept of equivalent interstand distance and fundamental value. The comparison between shortcut method calculated results and theory model calculated results showed that the temperature of hot strip at finishing rolling region could be calculated accurately. As target temperature is changed the status of cooling jet at interstand can be adjusted by short-cut calculation method to fit in with new target temperature.7|1|0更新时间：2026-01-21
- 摘要：Course and performance of crystallization of mold flux 37 CaO, 2MgO, 40SiO25Al2O35Na2O, 11CaF2at 1 300 ~ 1 000 °C have tested and studied. Results showed that as cooling rate was ≤2℃／s, crystallization ratio of the flux was 100% ； and as cooling rate was 0. 1 °C/s, dendritic crystal precipitated at first in flux, then lamellar crystal precipitated to last of crystallization. By X- ray analysis, crystal phases of flux consist of cuspidine Ca4Si2O7F2akermanite Ca2MgSi2O7wollastonite CaSiO3and magnesia alumina spinel Al2MgO4.2|0|0更新时间：2026-01-21
- 摘要：Influence factors on evolution of structure in hot rolled TRIP steels during TMP(Thermnomechanical processing)finishing rolling(austenite deformed in non-crystallization region),ROT(run out table)cooling(phase transformation in y-a two phase region)and coiling process (bainite transformation);evolution of structure of cold rolled TRIP steel during intercrilical annealing(γ-a region)and bainite isothermal region transformation, and carbon enrichment in retained austenite of TRIP steel during structural evolution are presented.关键词：TRIP钢;TMP; 热处理;组织演变2|0|0更新时间：2026-01-21
- 摘要：Production practice indicated that the amount(rating)of α-phase in 1Cr18Ni9Ti austenite stainless steel was principal factor to influence bloom surface quality of 2.625 t ingot, and as α-phase rating was more that 2.5 corresponding to α-phase content(area)= 12%, the surface quality of bloom rapidly decreased. As C% in steel was 0.08% (Cr+3.28Ti)/Ni≤2, and ingot pit temperature ≤1270 ℃, the rating of α-phase in steel was ≤2.5 to get excellent sur- face quality of bloom. For obtained nice surface quality of bloom it should be to control Ti content in steel ≤0.70%, and in ESR electrode Ti≤0.80%.7|0|0更新时间：2026-01-21
- 摘要：Back-propagation based improved training network algorithm was proposed and a prediction model for converter end point phosphorus based on fuzzy neural network has been established based on melting process and production data of a 150t converter and analysis on influence factors on end point phosphorus, in accordance with the deficiencies of present back propagation algorithm. The results showed that percentage of hits of converter end point phosphorus content in steel with error ±0. 002% was 68. 69%, that with error 士 0. 004% was up to 95. 96%, and the maximum error of end point phosphorus content was ±0. 006%2|0|0更新时间：2026-01-21
- 摘要：Due to complex and alternative impact load action during service the flaking and spalling occurred at sur- face of high manganese steel 1. 14C- 12.72Mn led to failure ahead of service time. With finite element analysis on internal stress conditions of railway frog by software ANSYS 8.0 it was obtained that maximum vertical stress at surface of frog was up to 5381 MPa while horizontal stress was 2450 MPa with hardened layer depth 15 mm; and shearing stress was 700 MPa with depth 1.5 mm which accelerated the surface flaking and spalling of railway frog. Microalloying of high manganese steel is available to fine grain and increase toughness of materials to prolong the service life of frog.关键词：高锰钢,铁路辙叉, 剥落应力状态;有限元分析2|0|0更新时间：2026-01-21
- 摘要：φ38 mm×6.6 mm seamless tube of steel TP347H(1Cr19Nil1Nb) was produced at Taiyuan Steel by hot metal pretreatment + 30 t EAF melting alloying steel -75 t K-OBM-S blowing -VOD treatment - LF -bloom by 5.6 t ingot or 220 mm×220 mm concasting billet -φ100 mm tube blank piercing - cold rolling (cold drawing) flow sheet. Results showed that the tube had excellent cold and hot workability by control [O]≤30×10-6[H]≤3×10-6As≤ 0.0030%,Pb,Sn,Sb,Bi respectively ≤0.0010%, and C content in steel0.06%~0.08%,Nb content 0.6%~ 0.8%,and each property of tube met the requirement of ASME and GB standard.2|0|0更新时间：2026-01-21
- 摘要：The optimum LF refining slag-52CaO,18Al2O316SiO29MgO,5CaF2for tube blank steel SA-210C (0. 18~0.24C,0.80～1. 10Mn) has obtained according to analysis on influence factors on fluxes viscosity and surface tension and by orthogonal test of which the viscosity and surface tension are 0.72 Pa · s and 0.43 N/m respectively. The 94 heats production data using optimum refining slag in a 100 t LF indicated that the micro inclusion amount and large inclusion content in molten steel after refining decreased by 22.6% and 35.4% respectively as compared that of using original refining slag, and the qualified heat rate for cleanliness increased to 98. 1% from original 96.8%.2|0|0更新时间：2026-01-21
- 摘要：It is available to decrease gas content in steel by long nozzle casting with shielding argon gas. The examination results showed that in comparison without argon gas shielding casting the total oxygen content in φ450 mm round billet of wheel steel produced with shielding argon gas at Maanshan Steel decreased to 27.9×10-6from original 49.3× 10-6the total inclusion content in steel decreased to 14.8×10-6from 29.7×10-6the quality of cast billet obviously in- creased and the mechanical properties of wheel increased appreciably.2|0|0更新时间：2026-01-21
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Effect of Quenching-Tempering Temperature on Structure and Properties of High Strength Steel 30NCD16
摘要：Structure and mechanical properties of ESR high strength steel 30NCD16(0.31C,1.41Cr,4.01Ni, 0.52Mo) quenched at 840~930℃ and tempered at 350~625℃ have been tested. Results showed that optimum heat treatment process for high strength steel 30NCD16 was quenching at 840~870℃+ tempering at 560 ℃ to get fine and homogeneous sorbite structure, tensile strength of steel≥1200MPa and impact energy AKU5≥50J.2|0|0更新时间：2026-01-21 - 摘要：The original rolling process for φ190 and φ200 mm stainless steel bars produced at Special Steel Co, Benxi Steel was by 800 primary mill blooming and finish-rolling from 3. 16 t ingot, by which the output of rolling products per hour was lower and the bars were easy twisted and scratched. At present the optimization process is used by 800 primary mill blooming ingot to 206 mm and 217 mm billet then by 650 continuous rolling mill finish-rolling to φ190 and φ200 mm bar products with square-oval-round pass series, by which the quality of products increases and the output increases from original 35 t/h to 55 t/h.2|0|0更新时间：2026-01-21
- 摘要：Alloy steel 40Cr is produced by 65 t Consteel EAF-65 t LF- 150 mm×150 mm billet costing flow sheet at Tonghua Steel. Examination and analysis results showed that oxygen content in liquid steel with LF refining decreased to 35×10-6from 227×10-6then during concasting the oxygen in molten steel in tundish increased to 51×10-6and oxygen content in billet was 54×10-6.Therefore key measure to increase cleanliness of steel and decrease [O] is further to prevent secondary oxidizing of liquid steel from ladle to tundish and in tundish and remove large inclusion in molten steel.关键词：Consteel 电弧炉;钢水洁净度;二次氧化3|0|0更新时间：2026-01-21
- 摘要：The CaO-CaF2CaO-B2O3and Li2O were respectively used as modifying agent adding to ladle slag to decrease slag adhesion of LATS-OB refining immersion cover and increase service life of cover. Test results of melting point of slag measured by hemisphere method showed that using, CaO:CaF2=1~2,CaO:B2O3=1~2 or Li2O as modifying agent could remarkably decrease melting point of ladle slag. And metal-slag equilibrium test indicated that the sulphur content in steel further decreased by ladle slag added modifying agent.关键词：LATS 精炼;钢包渣;调质剂;熔点;脱硫能力2|0|0更新时间：2026-01-21
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