最新刊期
卷 31 ， 期 3 ， 2010
- 摘要：A study on melting temperature of CaO-Al2O3-SiO2-MgO-CaF2refining slag has been carried out by using orthogonal experimental method. With variance analysis and significance criterion it is obtained that the optimum ingredient of the pentatomic refining slag is 25% Al2O312% CaF27% MgO and R2 ( CaO/SiO2) =2.5. And the regression analysis is carried out by using SPSS software to get the math relationship equation between ingredient with high reliability and melting temperature of refining slag: Tm= 1 451.3 - 6. 25CaF2- 7. 36R2.关键词：LF;五元精炼渣;熔化温度2|0|0更新时间：2026-01-21
- 摘要：Based on a 120 t converter, the 3-dimensional mathematical model has been established and the calculation of Euler two phases is carried out to get reasonable eccentric position of gas permeable elements for bottom blowing. O- riginal even distribution mode of 8 permeable elements with eccentric position 0. 56 R ( radius of converter bath) at an angle of 45 ° is optimized and modified to 6 permeable elements of which 2 elements with eccentric position 0. 53 R, 2 elements with 0. 65 R and 2 elements with 0. 46 R, center angle of two group combined gas permeable brick being 180° and inner angle 30°. Production practice shows that after optimization it is available to decrease consumption of bottom blowing gas, increase bath stirring energy and decrease carbon-oxygen concentration product to 0. 002 513 from original 0. 002 674.关键词：120 t顶底复吹转炉;底吹系统;三维数学模型;工艺优化2|0|0更新时间：2026-01-21
- 摘要：A system of numerical simulation to predict temperature field of rolling stock of bearing steel GCr15 (0. 99% C, 1. 47% Cr) from 160 mm x 160 mm billet rolling to Φ25. 0 mm and Φ35. 0 mm bar by rough rolling, No1 and No2 intermediate passes rolling and KOCKS mill rolling has been established to study the change of temperature of stock during rolling, the effect of inlet rolling speed at Nol intermediate passes (0. 55 m/s and 1. 1 m/s) on temperature of stock during rolling process and the effect cooling process after rolling (2 segment quick cooling and 3 segment quick cooling) on temperature of stock. Results show that the relative errors between calculated values and measured values are ≤3%.关键词：GCr15 Bearing Steel;Bar Product;Temperature Field;Numerical Simulation2|0|0更新时间：2026-01-21
- 摘要：The characteristics of liquid steel-slag interfacial profile and liquid field in mold with original nozzle for 304 stainless steel 200 mm × 1 550 mm slab have been studied by numerical simulation. Results show that in mold with original nozzle the upper returning flow is strong, led to liquid steel-slag interfacial profile unstable, thin slag layer at narrow side of mold, anil easier occurring slag entrapment and liquid exposed ； the optimum nozzle structure is to modify the V-type bottom of original nozzle to concave type, increase the taper of nozzle outlet with upward angle 10°.关键词：304 Stainless Steel;Slab;Nozzle Optimization;Casting Mold;Numerical Simulation2|0|0更新时间：2026-01-21
- 摘要：The regularity of bending of 100 m U75V steel straight rail during cooling process before straightening has been calculated by analyzing the boundary conditions of cooling of 100 m rail and using three-dimensional instantaneous non-linear finite element method. Results show that the bending deformation of the straight steel rail during cooling process is a repeat-cycling process, but the rail eventually is bent to the rail head ； with considering the friction between steel rail and cooling bed, after the straight steel rail finishing cooling the deforming feature of rail is straight at middle part, bent at both ends and scope of bent ends covering 18 m.关键词：100-m U75V Steel Rail;Bending of Rail before Straightening;Finite Element Method2|0|0更新时间：2026-01-21
- 摘要：A new concept of "non-carbon metallurgy by solar energy photovoltaic technology" is proposed, according to the research requirement its experimental system structure and parameters are defined and I kg-capacity experimental furnace is designed and manufactured. With defined process parameters and balance-calculated charging mass and heat energy in smelting process, the high temperature smelting test of non-carbon metallurgy by solar energy photovoltaic technology '' has been carried out. Test results show that the designed system meets the requirement of smelting and has better stability and operability. With exergy calculation it is obtained that the utilization of solar photovoltaic technology' is a process to increase itself exergy value.关键词：太阳能光伏;非碳冶金;高温熔炼;物料衡算;能量衡算;砽计算2|0|0更新时间：2026-01-21
- 摘要：The steel grades and characteristics of traditional and new developed hot working die steels at home and abroad including die steels for hot forging, hot extrusion and pressured casting, as well as for special properties service are presented in this article, while the research progress on heat treatment and surface treatment for hot working die steel is introduced. At present, increasing cleanliness of die steels, homogenizing and fining structure, and developing new grades and processes of hot working die steel by computer simulation technology are important methods to increase service life of hot working die steels.2|0|0更新时间：2026-01-21
- 摘要：The longitudinal surface crack of 68 mm x 1 600 mm casting slab of Q235B steel (0. 18% C) and Q345B sleel (0. 17%C) produced by CSP process at Jiuquan Steel mainly occurred at first slab between heats with width of crack 0. 01 -0. 30 mm, depth 0. 10 mm and length ≥50 mm. The results by analyzing the influence factors on longitudinal crack show that as [ S] ≥ 008% , overheating temperature of liquid steel 340° , mold taper ≤4 mm, lower basicity and viscosity of mold powder and thickness of mold copper plat ≤12 mm, the crack index of slab obviously increases. With controlling [S] ≤0. 008% , overheating temperature of liquid steel 30 ±5 ℃ , fluctuation of liquid surface in mold + 3 mm, the occurred rate of crack for Q235B steel decreases to 0. 36% from original 2% , and for Q345B steel decreases to 0. 98% from original 5% .关键词：Q235B and Q345B Steel;CSP;Casting Slab;Longitudinal Crack;Practice2|0|0更新时间：2026-01-21
- 摘要：According to the requirement of production for high strength pipe line steels at Masteel and combined with the forming region of 12CaO , 7 Al2O3of CaO-Al2O3-SiO2phase diagram, the ladle refining slag series ( % ： 55 - 60CaO, 7 〜12SiO225 ~ 30Al2O34 〜8MgO) for pipe line tube has been developed and applied. 300 t LF refining practice shows that with using the refining slag series, the average desulphurization rate is 73. 2% , the end sulphur content in steel is controlled less than 0. 002% ； and the slag series has nice capability to absorb inclusions, the Alt - Als content in steel is lower, i.e, 0. 002% -0.013%.关键词：Pipe Line Steel;Refining Slag;Desulphurization Rate;Inclusions2|0|0更新时间：2026-01-21
- 摘要：The carbon segregation at cross section of 300 mm x 340 mm casting bloom of CrMo and CrMnTi series gear steel containing 0. 20% ~ 0. 04% C produced by 100 t UHP EAF-LF (VD) -concasting flow sheet has been tested and studied. At normal production conditions, to control the casting liquid overheating extent 15 ~ 25 ℃ , the secondary cooling water rate 0. 35 L/kg, and the torque of mode and final electromagnetic stirring respectively 18 and 15 cN • cm is favorable to improve the bloom segregation. The verifying results in production practice show that the extreme different of corrected carbon content in bloom is less than 0. 025% and the rating of macro segregation of rolled products is less than 2. 5.关键词：Gear steel;Casting Bloom;Carbon Segregation2|0|0更新时间：2026-01-21
- 摘要：The controlling results of inclusions in steel during refining austenite stainless steel 0Cr18Crl9 in a 90 t ladle furnace at No2 steelmaking plant, Taiyuan Steel are presented. Operation practice shows that after VOD process, oxygen content in steel is (40 ~55) x 10-6then feeding 0. 3 ~ 1. 0 kg/t aluminum wire in LF, the oxygen content in steel further decreases to (24 ~35) x 10-6while the amount of inclusions in steel decreases by more than 40% ； followed by feeding 0. 9 ~ 1. 5 kg/t silicon-calcium wire, the inclusions in steel are modified to spheroid, and with 200 ~ 600 L/min argon stirring for 10 ~ 20 min and 50 ~ 150 L/min for 15 - 20 min, the amount of inclusions in steel further decreases by more than 50% and the inclusions size more than 30 μm are removed from liquid steel.关键词：90 t LF;Austenite Stainless Steel;Refining;Cleanliness2|0|0更新时间：2026-01-21
- 摘要：The oxidation test of concasting slab specimen of steel SPAH (% : 0. 05C, 0. 25Cu, 0. 12Ni, 0. 41 Cr) at 900 ~ 1 250 ℃ for 20 min was carried out by using box electric resistance furnace in laboratory, and the structure and chemical composition of oxidation layer of specimen were obsen ed and analyzed by scanning electron microscope ( SEM) and energy dispersive spectrometer ( EDS). Results show that with increasing heating temperature, the oxidizing rate of steel dramatically increases while the amount of Cu enriched phase in oxidation layer increases； as heating at ≤ 1 000 ℃ , the oxidation of grain boundary is dominant, and as heating at temperature more than 1 000 °C , the oxidation of grain interior is dominant. Therefore during heating concasting slab of steel SPAH for container plate, the heating time at high temperature region should be decreased to lower the oxidation loss.关键词：Steel SPAH;Concasting Slab;Weight Gain of Oxidation;Cu Enriched Phase2|0|0更新时间：2026-01-21
- 摘要：In spring steel 60Si2MnA and 55CrSiA steelmaking by EAF-LF-VD, it is available to control [ Als ] ≤ 60 x 10-6the total [O] (9 〜20) x 10-6and get the rating of A series inclusion ≤0.5 , B series ≤0. 5 , C series ≤ 1. 5 and D series ≤0. 5 by adding 17 ~ 23 kg/t low aluminum ferrosilicon (Al content ≤0. 50% ) during EAF tapping, adding more 3 ~6 kg/t ferrosilicon during LF refining and controlling basicity of refining slag ≤2. 5. The molten steel produced by this deoxidation process has excellent castability being available for mass production.关键词：60Si2MnA、55CrSiA弹簧钢;无铝脱氧;工艺实践4|0|0更新时间：2026-01-21
- 摘要：Based on space-time multi-scale structure during material transformation process in melting and its effects, the 150 t electric arc furnace steelmaking process at Tianjin Pipe Co has been studied to realize the trans-scale energy integration of two unit- electric power supplying and oxygen supplying at working-level and to get math model for trans-scale energy integration at working-level. The results of 20 heats commercial test with quaternary charge structure show that better production effect is got by using the trans-scale energy integration's method, i. e. average tapping liquid amount 141. 2 t； electric power consumption for melting 314. 3 kWh/t； oxygen consumption 41. 0 m3/t； oxygen efficiency 87. 7% ； metal yield 88. 5% and tap-to-tap time 49. 5 min.关键词：150 t EAF;Steelmaking;Space-Time Multi-scale Structure;Trans-scale;Energy Integration2|0|0更新时间：2026-01-21
- 摘要：The electrical power parameters of a 50 t/32 MVA electric arc furnace (EAF) in steelmaking at CIRIC Heavy Machinery Co Ltd were measured by electrical monitoring instrument to obtain 52 310 valid data. The results show that the power factors of reactor's primary side on load are all more than 0. 800 and during steelmaking the three phase voltage, current and power factors of power supply circuit are balance. Taking the working current at secondary side of transformer as independent variable, the nonlinear reactance model is established to get the electrical operation characteristics curves and determine the permissible range of working current at each voltage tap. The research results show that as the operation voltage tap of reactor modifies to tap 4 from original tap 3, the utilization ratio of EAF transformer shall increase by 7. 30% , and the power factor shall raise to 0. 841 from original 0. 812.关键词：Cast Steel;Steelmaking;50 t/32 MVA AC EAF;Electrical Operation Characteristics4|0|0更新时间：2026-01-21
- 摘要：S-series free-cutting austenite stainless steel 3O3CuS2 ( % : ≤0. 08C, 8. 00 ~ 10. 00Ni, 17. 00 ~ 19. 00Cr, 1. 50 〜3. 50Cu, 0. 24 - 0. 35S) is smelted by 60 t EAF-60 t AOD-60 t LF-CC flow sheet. With decreasing basicity of AOD refining slag to 1. 6 from original 2. 0 and controlling AOD tapping slag amount, the [ S] in AOD tapping steel increases to 0. 008% ~0. 010% from original 0. 004% - 0. 006% , and with feeding S wire containing 50% S and controling end temperature ,the yield of S increases to 60% - 70% from original 30% ~50% , the qualified ratio of products raises to 100% from 85% .关键词：Sulfur;Cr-Ni Austenite Stainless Steel;AOD;LF;Process Optimization2|0|0更新时间：2026-01-21
- 摘要：The mechanical properties and micro structure of microalloying pipeline steel X70 ( % ：0. 04C, 1. 54Mn, 0. 05Nb, 0. 04V, 0. 01Ti, 0.003 9N) of 14. 6 mm sheet continuous rolled from 150 mm casting slab have been tested and analyzed. Results show that with adding micro niobium and after breakdown with control rolling by deformation N70% at ≤950 °C , finishing rolling at 800 ℃ , then cooling to 500 -550 °C with 20 ~30 ℃/s, the structure of X70 pipeline steel at ambient temperature is typical acicular ferrite with grain size 2 ~ 5 μm, which has excellent comprehensive mechanical properties i. e. σ0.5≥565 MPa, σb≥655 MPa and Cv at -20℃≥212 J.关键词：X70;Control-Rolling;Acicular Ferrite;Metal Strengthening2|0|0更新时间：2026-01-21
- 摘要：Thermal expansion characteristics and elevated temperature mechanical properties of 200 mm x 1 350 mm casting slab of steel Q450NQR1 (% ： 0. 05 ~0. 10C, 0. 30 ~0. 50Si, 0. 80 ~ 1. 00Mn, 0. 20 ~0. 30Cu, 0. 15 ~0. 35Ni, 0. 40 - 0. 60Cr) have been examined by using thermal expansion tester DIL402C and thermal simulater Gleeble-1500D. Results show that with increasing heating and cooling rate from 5 ℃/min to 10 ℃/min, the heating phase transformation region moves up and the cooling phase transformation region moves down； the secondary brittleness zone of casting slab of steel Q450NQR1 is 750 ~ 1 050 ℃,therefore the straightening temperature of slab should be ≥1 050 ℃.关键词：Q450NQR1;高强度耐候钢;热膨胀性能;热塑性2|0|0更新时间：2026-01-21
- 摘要：The thermodynamics of oxidizing and nitriding reaction of Cr in steel is analyzed and the effect of 0. 025% - 0. 045% Cr on magnetic properties of 0. 5 mm non-oriented silicon steel (% : 0. 001 8C, 0.45Si, 0.45Mn, 0. 106P, 0. 003S, 0. 001 2N) annealed at 900 ℃ + secondary annealed at 750 ~ 1 050 ℃ is tested and studied. Results show that the precipitation temperature of nitride of Cr in steel is 913 K, i. e. it precipitates during hot finishing rolling and coiling process ； with increasing Cr content in steel, the grain size of steel decreases, for core loss the hysteresis loss increases , while change of vortex loss is little, in order to ensure the magnetic properties of steel, the Cr content in steel should be controlled ≤0. 03%.关键词：Chromium;Non-Oriented Silicon Steel;Secondary Annealing;Magnetic Properties9|0|0更新时间：2026-01-21
- 摘要：Double passes hot-compression test of martensite steel 403 Nb (% ： 0. 16C, 11. 98Cr, 0. 03Mo, 0. 22 Nb, 0. 01V, 0. 12Ni) with internal time between passes 1 ~ 100 s and strain rate 0. 01 ~ 10 s-1at 950 ~ 1 150 °C has been carried out by using Gleeble-3500 thermal simulator. With summarizing established different static recrystallization math models, it is obtained that the activation energy Qrexof static recrystallization of steel 403 Nb is 168. 40 kJ/mol, die static recrystallization model is t0.5=6.599 9×10-10ε-1.6ε-0.46d0exp( 168 400 /RT). Results show that with short internal time, the steel grain size coarsens and the static recrystallization rate decreases ； with longer internal time, the static recrystallization is nearly completed with most equiaxial grains. During hot compression, the static recrystallization is almost completed with finest grains in the region with maximum shear strain.关键词：403Nb叶片钢;热压缩;静态再结晶3|0|0更新时间：2026-01-21
- 摘要：The hood type furnace annealing process at 700 °C of 1.9 mm and 1.0 mm thin sheet cold rolled with 62. 0% and 71.4% reduction of ultra-low carbon steel DC01 ( 0. 047% C ) and SPCC (0. 041 % C ) produced by CSP process at Baotou Iron and Steel Co has been simulated in laboratory by electric resistance furnace. Results show that the main textures of annealed cold rolling sheet are {111}〈110〉and {111}〈112〉 ； the orientation density of {112}〈110〉 in cold rolling sheet with reduction 71.4% annealed with faster heating rate is greatest, the proportion of large-angle grain boundary is larger, the density of textures is higher and the texture mainly concentrates near the -y orientation fibre.关键词：超低碳钢;CSP工艺;冷轧板;退火;织构2|0|0更新时间：2026-01-21
- 摘要：Hot compressive test of Φ8 mm X 12 mm cylinder test specimen of ultra-low carbon steel M21 ( % : 0. 003C, 0. 045Al, 0. 06Ti, 0. 002 7N, 0. 000 2B) with deformation extent 0 〜80% and strain rate 5 ~ 50 s-1at 900 〜 1 100℃ has been carried out by thermal test machine. Results show that with decreasing temperature, increasing strain rate and deformation extent, the deformation resistance of ultra-low carbon steel increases. And the math model of deformation resistance of the ultra-low carbon steel is established by Origin software with multi-component non-linear regression, and the fit precision is higher.关键词：Ultra-low Carbon Steel;Hot Simulation Test;Deformation Resistance;Math Model2|0|0更新时间：2026-01-21
- 摘要：High-cycle fatigue properties of two C70S6 steels without and with Ti in steel ( % : 0. 69C-0. 034V- < 0. 005Ti-0. 015N and 0. 72C-0. 036V-0. 023Ti-0. 014N) for connecting rod of fracture splitting have been studied by using rotating-bending fatigue test method. Results show that all fatigue cracks initiated at matrix of surface of specimen, and the high-cycle fatigue properties are affected by micro-structure especially by interlamellar spacing of pearlite ； the interlainellar spacing of pearlite in the steel C70S6 containing 0. 023% Ti is larger than that in the Ti-free steel C70S6 in which there is coarse ( Ti, V) ( C, N) precipitates, therefore the fatigue properties of 0. 023%Ti steel are lower that that of Ti-free steel.关键词：C70S6 Steel;High-Cycle Fatigue Property;Microstructure;Connecting Rod of Fracture Splitting2|0|0更新时间：2026-01-21
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