最新刊期
卷 34 ， 期 3 ， 2013
- 摘要：In order to evaluate whether the existing design of submerged nozzle is reasonable or not, the simulation test on liquid level fluctuation and impact depth of flow in 230 mm x (900 ~2 150) mm mold with casting speed 0. 8 ~ 1.7 m/min is earned out by using geometric similarity 1: 2 water model. Results show that for current mold of five different cross sections, the liquid level is relatively stable and the wave height in model is no more than 1. 5 mm (corresponding prototype within 3 mm) , the slag level is stable and the distribution of molten slag layer is relatively uniform； but as for smaller cross-section slab with lower casting speed even if the impact depth is lower the liquid level fluctuation is less than 0. 5 mm (corresponding prototype less than 1.0 mm) led to lack of activity of slag-steel interface, bad melting of slag, and even causing shell of liquid surface, therefore it is necessary to re\ amp and optimize the current submerged nozzle.关键词：板坯;结晶器;浸入式水口;水模型;液面波动2|0|0更新时间：2026-01-21
- 摘要：With using 1： 3 water model test the study on flow field of molten steel in an 80 t tundish with different flow control structure for eight strand 150 mm x 150 mm billet casting at steel works has been carried out and is verified by numerical simulation method. Study results show that the improvement of flow effect of molten steel in tundish is not obvious by only adding turbulence inhibitor, but adding "V" type baffle in tundish can obviously improve the flow characteristics of each stand, and the combination of turbulence inhibitor" type baffle and single dam can further improve the uniformity of flow characteristic of each strand and the average residence time increases to 505. 22 s, in the meanwhile the obvious circulation areas are formed at both sides of the dam. As the single dam is modified to double clam the average Vp/Vdincreases to 2. 38 from original 1. 77, the average proportion of dead zone also reduces by 6. 0% while the stability at each nozzle and the coincidence of residence time distribution curves of each strand is best, and there are 3 big circulation areas and a small circulation area. The results of water model test coincide with the results of numerical simulation.关键词：八流方坯连铸;中间包;流场;水模型实验;数值模拟3|0|0更新时间：2026-01-21
- 摘要：By using Gleeble-3500 thermal mechanical simulator, deformation resistance of 150 mm casting slab of 0. 47C-0. 36Si-0. 67Mn medium carbon steel with strain 0. 1 ~0. 6 and strain rate 10 ~ 20 s-1at 650 ~920℃ in single pass axial compression process is tested and studied, and a math model for deformation resistance of test steel at lower temperature is established. Results show that with decreasing temperature. increasing strain and strain rate, the deformation resistance of test steel increases: in deformation at less than 700℃ , due to occurrence of dynamic ferrite phase transformation, as work-hardening and dynamic phase transformation softening are going to balance the maximum value of deformation resistance occurs on curves, later with increasing deformation-inducetl ferrite amount the deformation resistance decreases. The calculated value conforms to measured value, the error of forecasting deformation value is ± 13. 76 MPa.关键词：0.47C-0.36Si-0.67Mn中碳钢;连铸板坯;热模拟;低温轧制;变形抗力;数学模型2|0|0更新时间：2026-01-21
- 摘要：According to similarity ratio 1 ： 10, a simulation on rolling process of hot-rolled U-section steel sheet piling is carried out by using laboratory mill with test stock of lead and the relationship between rolling conditions and end bending of hot-rolled U-section steel sheet piling is obtained by change 4 kinds of rolling lubrication conditions and 5 kinds of velocity difference in 0. 6 ~ 1.0. Test results show that the bending degree produced in pass rolling is preliminarily caused by roll velocity difference, but the bending degree also changes with different rolling lubrication condition. In order to improve the bending defect caused by pass rolling process, as other rolling parameters keep constant, it is available to select 0. 65 roll velocity ratio combined with roller surface parameter in no-lubrication condition.关键词：U型钢板桩;轧制润滑;辐速差;头部翘曲2|0|0更新时间：2026-01-21
- 摘要：The effect of ingredient and basicity ( 1.0 ~ 1.2 ) of (/% :) 38. 5 ~ 45. 8CaO-38. 2 〜42. 0SiO2-8 ~ 15 Al2O3-8MgO refining slag series on morphology of inclusions in spring steel 55SiCrA (/% : 0. 53C, 1. 50Si, 0. 70Mn, 0. 69Cr, 0. 008P, 0. 003S, 0. 005 Als) has been studied silicon-molybdenum tube furnace with Al2O3crucible in laboratory, and the thermodynamic calculation on ingredient of inclusions and the analysis on distribution of inclusions in ternary phase diagram are carried out by using thermodynamic software Factsage. Results show that with increasing Al2O3content in refining slag the Al2O3content in inclusions increases, as the basicity of slag is 1. 2 with 8% Al2O3the inclusions in steel are distributed at low melting point area in Al2O3-SiO2-MnO ternary phase diagram and the Al2O3content in inclusion is 30% ~40% . Thermodynamic calculation results show that as basicity of slag is 1.0 ~ 1. 2 the corresponding Als in steel is 0. 008% that meets the examination results. Therefore it is available to control the morphology of inclusions in spring steel by using low basicity 1.0 ~ 1. 2 and ≤8%Al2O3refining slag.关键词：55SiCrA弹簧钢;Al2O3-SiO2-CaO精炼渣系;夹杂物成分和形态2|0|0更新时间：2026-01-21
- 摘要：The simulation test on process parameters for an 150 t ladle bottom argon blowing with geometric simularity ratio 1： 4. 5 water model has been carried out to study the effect of blowing nozzle circle (0. 40 ~0. 70 R) , angle of nozzle at same circle (60° ~ 120°) and flow rate ( 189 ~378 L/h) on mixing time, define the relationship between argon flow rate and surface gas velocity and analyze on slag entrapment phenomena at different flow rate. Results show that the parameters of optimum bottom argon blowing scheme are angle 120°, 0. 7 R double nozzle at same circle and blowing flow rate 378 L/h (corresponding to real flow rate 600 L/min) ； the optimum wire feeding location is at 0. 4R； and in soft blowing the critical slag entrapment bottom flow rate is 110 L/h (corresponding to real flow rate 175 L/min).关键词：150 t钢包;底吹氩;水模型;卷渣5|0|0更新时间：2026-01-21
- 摘要：The rule of flowing of converter slag particles (/% : 40~60CaO, 10 ~20SiO21 ~5Al2O37 ~ 10FeO, 5 〜10Fe2O35 ~ 15MgO, 2 ~6MnO，1 ~5P2O50~10f-CaO) in rotary container (cylinder reactor) with rotating angular velocity 0. 3 ~ 2. 0 r/s is simulated by software Fluent to analyze the characteristics of flowing of slag particles. The mathematic model is established to define optimum rotate velocity for removing free calcium oxide. Results show that with increasing rotating velocity of the cylinder the rotating status of flowing of slag particles develops into small, bigger waterfall and circle flowing, and as rotating angle velocity increases to 0. 8 r/s, flowing status of eddy occurs in center of cylinder.关键词：转炉渣颗粒;回转圆筒;流动;数值模拟2|0|0更新时间：2026-01-21
- 摘要：Based on published patented manufactured technologies for high strength pipeline steel including heavy plate, hot rolled coil and seamless tube at home and abroad in 2011. the key manufacturing technologies, structure and properties of pipeline steel with excellent anti-large-strain-deformation, low temperature toughness and corrosion resistance are summarized. The main R&D characteristics and trend on high strength pipeline steel are excellent anti-large-strain-deformation steel- through dispersed M/A to increase strength of steel: low temperature toughness steel- using Mn-Nb-Mo alloying and control rolling to get main ferrite and/or bainite structure ； and anti-HIC ( hydrogen-induced cracking) pipeline steel- with prerequisite to control C, P, Mn segregation induced HIC, lowing Nb and Ti content in steel to prevent Nb, Ti carbo-nitride inducing hydrogen-induced cracking.关键词：高强度管线钢;抗大变形;低温韧性;抗HIC;专利研发进展2|0|0更新时间：2026-01-21
- 摘要：As main inhibitor or auxiliary inhibitor for grain-oriented silicon steel, the particles of inhibitor bearing copper not only inhibit the primary crystal growing and promote the secondary recrystallization, but also decrease the heat temperature of casting slab. The main inhibitor for grain-oriented silicon steel is 10 ~ 50 nm Cu2S, which precipitate in process and procedure including steel casting slab, hot rolling, cold rolling and decarburizing process, while the 30 - 50 nm or more than 50 nm （ Cu,Mn）1.8S, Cu1.8S and ε-Cu etc are mainly as auxiliary inhibitor which mostly precipitate in hot rolling process. The progress of research works on behaviors of solution and precipitation of inhibitors bearing copper in grain-oriented silicon steel at home and abroad is summarized in this paper, and current research works are precipitated behaviors and effect mechanism of inhibitors bearing copper in different production flow sheet and procedure.关键词：取向硅钢;含铜抑制剂;固溶析岀行为2|0|0更新时间：2026-01-21
- 摘要：The Super304H austenite stainless steel (0. 10C-18Cr-9Ni-3Cu-0. 4Nb- 0. 08N) is one of first selected materials for superheater and reheater tubes of ultra-supercritical unit. As the steel has higher carbon content and its service temperature ( ~ 650 °C ) is the sensitizing temperature of M23C6precipitating along grain boundary, how to avoid the occurrence of intergranular corrosion is a main research topic for Super304H steel. The research progress for intergranular corrosion susceptibility of Super304H steel at home and abroad is summarized in this article including intergranular corrosion mechanism, effect of alloy elements in steel especially Nb/C, double solid-solution treatment, stabilizing treatment, welding process and 600 ~ 700 ℃ high temperature aging on intergranular corrosion of this steel, and characterization methods for sensitiveness of intergranular corrosion of Super304H steel. The research and development of Super304H steel is prospected.关键词：Super304H奥氏体不锈钢;超超临界机组;晶间腐蚀敏感性;研究进展2|0|0更新时间：2026-01-21
- 摘要：Based on theoretical analysis on dephosphorization in steelmaking process, the off-gas analysis is used to control steel melting process and end-point temperature of molten steel, control slag melting process, forecast end-point phosphorus content in steel and get low phosphorus molten steel. For 100 t top and bottom combined blown converter at Shouqin Metal Materials Co Ltd, the silicon content in hot metal is 0. 2% ~ 0. 8% and the phosphorus content is 0. 052% ~ 0. 090% , the pipeline steel production results show that by off-gas analysis the percentage of hits for end-point temperature of molten steel (1 580 ~ 1 650 ℃)is more than 95% , and the forecasting by model and the measuring BOF end-point phosphorus content are respectively 0.007 6% and 0.007 4%. The aim of BOF end-point phosphorus content ≤ 0. 010% is realized by off-gas analysis.关键词：100t转炉;炼钢;烟气分析;终点控制;低磷钢2|0|0更新时间：2026-01-21
- 摘要：With using 120 t top and bottom combined blown converter-LF refining-VD-Φ150 ~ Φ200 mm round billet casting flow sheet, the development and production for casting round billet of J55 (37Mn5) , L80 ( TC80, 0.24% ~ 0. 28%C, 1.40% ~ 1. 55Mn) , N80 (36Mn2V) and Pl 10 (26CrMn4) grade oil case steel have been completed at Tiansteel by the measures including controlling residual deleterious elements content in metal； intensifying converter dephosphorizing in early phase, controlling end [C] ≥0. 10% and after tapping slag layer thickness in ladle W50 mm； controlling ingredient of refining slag and end slag ( FeO + MnO) ≤ 1.0% ； increasing bottom argon flow rate to 200 ~ 300 L/min in VD process ； and shielding casting in whole casting process. Production results show that for J 55 grade steel the total oxygen content is ≤25 x 10-6and P ≤0. 020% ； for L80, N80 and P110 grade steels the total oxygen content ≤20 x 10-6and P≤0. 015% ； the residual deleterious elements ( Pb + Sn + As + Sb + Bi) ≤ 140 x 10-6the rating of total inclusions in steel ≤2. 5 and the ratings of central porosity and shrinkage cavity are respectively ≤1.0.关键词：石油套管钢;120 t转炉-LF-VD-圆坯连铸流程;质量控制2|0|0更新时间：2026-01-21
- 摘要：In accordance with inclusion defects occurred on cold rolled sheet of 430, 0C113R, 409 etc. ferrite stainless steels, the effect of basicity (1. 10 ~ 5. 98) of tundish covering flux on cleanliness of steel is studied, and the change of basicity, Al2O3and SiO2content in tundish covering flux with basicity R = 5. 98 during casting process is analyzed. Results show that in casting process , the basicity R =5. 98 of high basicity tundish covering flux decreases from original flux R = 5. 98 to R =3. 0, the high basicity tundish covering flux has excellent ability to absorb the inclusions in steel and has low ability of transport oxygen to liquid steel, the high basicity flux can remarkably improve cleanliness of steel.关键词：铁素体不锈钢;中间包覆盖剂;高碱度;夹杂物;洁净度3|0|0更新时间：2026-01-21
- 摘要：Zinc content in charging and output items for 1 080 m3No5 blast furnace at Ironmaking Plant, Jiyuan Steel has been analyzed, and combined with real production data of furnace the calculation on equilibrium distribution of zinc is carried out. Results show that zinc load of No5 blast furnace is 625 g/t, in furnace charging, most zinc load is from sinter ore its percentage is up to 72. 22% , next zinc load is from pellet ore it can reach to 24. 13% ； in output items the most amount of zinc is in gas ash which makes up 96. 14% of the total output value. The corresponding measures to control zinc including selecting of charging, optimizing blast furnace operation scheduling and dust de-zincing etc. are presented.关键词：高炉;锌负荷;平衡计算;控制措施2|0|0更新时间：2026-01-21
- 摘要：The production flow sheet of steel S34MnV for marine crank is 100 t Consteel arc furnace-LF-VD + VC (vacuum casting) -ingot process. The observation and analysis on samples of defect region of steel S34MnV ingot are carried out by using scanning electron microscope and numerical simulation to get that the a large amount of non-metallic inclusions enriched at deposit cone of ingot is the cause of rejection of crank by non-destructive test. With using optimum process measures including feeding 2 m/t aluminium wire to deep-deoxidize before refining, feeding Ca-Si wire for end deoxidization, controlling type of inclusions in steel, adjusting slag series and optimizing structure of steel ingot mold etc. the defects at deposit cone of ingot reduce, the rejection rate of ingot is reduced to 6% from original 21% and the oxygen content in steel of ingot bottom decreases to 12 x 10-6from original 23 x 10-6.关键词：船用曲柄钢S34MnV;钢锭;沉积锥;夹杂物;工艺优化2|0|0更新时间：2026-01-21
- 摘要：According to the results of analysis on performance of present mold powder FRK-2 and FRK-49 at steel works, based on mold powder FRK-2 (/% ： 32. 68SiO224.42CaO, 3. 30MgO, 9. 52Al2O35.40Na2O, 3. 10Fe2O33. 59F-12. 60C) a mold powder for casting 150 mm x 150 mm billet of free cutting steel X1215 (/% ： 0. 06 ~0. 09C, ≤ 0. 10Si, 1. 20 ~ 1. 50Mn, 0. 08 ~0. 10P, 0. 30 ~0. 50S) with higher basicity, nice holding effect, lower viscosity and definite reducing capacity to decrease S and 0 content in liquid at meniscus and avoiding slag entrapment has been developed. Production results show that the performance of mold powder meets the requirement for production of low carbon and high sulfur free cutting steel X1215; the segregation index of alloy elements in steel is 0. 90 ~ 1. 10, the segregation index of S and Mn is respectively 0. 95 - 1. 05 and 0. 98 - 1. 03 ； and the billet has nice internal quality.关键词：易切削钢X1215;结晶器保护渣;150 mm x 150 mm连铸坯;成分偏析2|0|0更新时间：2026-01-21
- 摘要：The test steel 42CrMoTiB and RE microalloying steels 42CrMoTiBRE (/% : 0.41 -0.43C, 0. 36 ~0. 38Si, 0.59~0.72Mn, 0.018 ~ 0.020P, 0.005 ~0.010S, 1.08-1. 13Cr, 0. 16~0. 19Mo, 0. 06 ~ 0.08Ti, 0. 003 ~ 0.004B, 0~ 0. 020Ce or Sm, 0.001 3 ~0.001 5 T [O]) are melted by an 150 kg vacuum induction furnace, casting average cross section 165 mm x 165 mm ingot then forged to 120 mm x 120 mm billet. The effect of Ce or Sm on inclusions and mechanical properties of steel 42CrMoTiB forged billet is studied. Results show that as compared with non-adding RE steel 42CrMoTiB, the inclusion amount in steel 42CrMoTiBRE with adding 0. 18RE ( RE content in steel- 0. 019% ~0. 020% ) decreases obviously ,the inclusion rating units of heavy series A, B and D respectively decrease from 0. 5, 2. 0 and 0. 5 to 0, 0 ~ 0. 5 and 0, and that of thin series respectively decrease from 0. 5, 1. 5 and 2. 0 to 0, 1. 0 and 1. 0; The morphology of inclusions in steel is modified by adding RE to form spherical RE oxysulfide ； and the plasticity and toughness of steel markedly increase by adding RE, as compared with non-adding RE steel 42CrMoTiB the transverse reduction of area (Z) and Charpy V-notch impact energy of steel 42CrMoTiBCe increase respectively from 22% and 17 J/cm2to 30% and 28 J/cm2.关键词：42CrMoTiB钢;稀土;夹杂物;力学性能2|0|0更新时间：2026-01-21
- 摘要：Tested EA4T axle steel (/% : 0. 26C, 0. 35Si, 0. 75Mn, 0. 01 IP, 0. 012S, 1. 04Cr, 0. 22Mo) is melted by a 10 kg vacuum induction furnace. The single pass reduction test on tested EA4T axle steel is carried out by using Gleeble-1500 thermal simulation machine to study the effect of temperature (950 ~ 1 150℃) , strain (0 ~0. 8) and strain rate (0. 1 - 20 s-1) on deformation resistance of this steel, and the a math model for hot deformation resistance of the steel is established. Results show that the dynamic recrystallization of the steel easily occurs at higher temperature and lower strain rate, its peak stress (σP), peak strain ( εP) and steady strain (σs) of test steel are all in linear relationship with parameter InZ； the peak and steady activation energy of test steel is respectively 320. 22 kJ/mol and 361. 91 kJ/mol ； and the deformation resistance calculated by predicted model is in good agreement with measured result.关键词：EA4T车轴钢;应力;应变;激活能;数学模型2|0|0更新时间：2026-01-21
- 摘要：The effect of solid solution treatment at 1 000 ~ 1 150 Y on structure and mechanical properties of alloy GH4700 (/% : 0. 05C, 25Cr, 20Co, 1. 65Nb, 1. 47A1, 1. 69Ti, bal Ni) has been studied. Results show that the tensile, yield strength and elongation of 4>89 mm x 15 mm GH4700 alloy tube extruded at 1 180 °C , air cooling are respectively 1 150 MPa, 780 MPa, and 36% ; as the alloy solid-solution-treaded at 1 000 ~ 1 060 ℃ with increasing temperature the γ’ phase gradually dissolves into the matrix, the grains of alloy grow obviously, the strength decreases markedly and the plasticity rapidly increases; at 1 090 ~ 1 150 °C the trend of grain growth is not appreciable, the change trend of strength and plasticity of alloy is very slow； with solid-solution-treated at 1 150 ℃，the tensile strength, yield strength and elongation of alloy GH4700 are respectively 800 MPa, 330 MPa and 65%.关键词：镍基合金GH4700;固溶处理;γ’相;晶粒尺寸;力学性能2|0|0更新时间：2026-01-21
- 摘要：The steel LG40Cr for connecting rod (/% : 0. 40C, 0. 24Si, 0. 72Mn, 0. 016P, 0. 005S, 0. 98Cr, 0. 036Al) is produced by 50 t EAF-60 t LF-VD-260 mm x 300 mm bloom concasting- continuous rolling Φ70 mm round bar process flow sheet at Laiwu Special Steel Division. 30 samples of steel LG40Cr are used to carry out rotating bending fatigue test, and before test the samples are heat-treated by oil quenched at 860 ℃ + tempered at 570 ℃ , and their yield and tensile strength, elongation and reduction of area are respectively 835 〜840 MPa and 1 030 ~ 1 040 MPa, and 14% ~ 15% and 48% -49% . The ratings of nonmetallic inclusion in steel are 0 - 1. 0. The test of cylindrical specimen is carried out at 9 stress (400 ~ 600 MPa) by 4 loading point, the S-N curve and the fatigue limit are measured and calculated and the morphology of fatigue fracture of samples at both stress 420 MPa and 500 MPa is analyzed. Test results show that the test material has nice combination of strength and plasticity, good interior metallurgy quality and higher cleanliness, and corresponding to 1. 0 x 107fatigue life the fatigue limit of the steel LG40Cr samples is up to 427 MPa.关键词：连杆用钢LG40Cr;旋转弯曲疲劳性能;断口形貌;S-N曲线2|0|0更新时间：2026-01-21
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