最新刊期
卷 32 ， 期 5 ， 2011
- 摘要：The pre-melting process of12CaO·7Al2O3and the desulphurizing ability of12CaO·7Al2O3based refining slag containing 10%-20%BaO, 2%-6% MgO, 1%-3%Li2Oand(12CaO·7Al2O3)/SiO2=8～10on low carbon steel liquid (% ：0.23C, 1.29Mn, 0. 44Si, 0. 026P, 0.023S, 0.04Mo, 0.02Cr, 0.06Cu) have been tested and studied by aMoSi2shaft type electric resistance furnace in laboratory. Results show that the12CaO·7Al2O3based pre-melting refining slag has better desulphurizing ability, with adding 3% slag at 1590 °C , the sulphur content in liquid can decrease to 0.006% from 0.030% , i. e. the ratio of desulphurization is 80.00% . With optimization of slag ingredient by using orthogonal method, it is obtained that the optimizing slag series of12CaO·7Al2O3based refining slag is 15% BaO, 4% MgO, 3%Li2O and(12CaO·7Al2O3)/SiO2=9.关键词：12CaO·7Al2O3;精炼渣;脱硫;二次精炼2|0|0更新时间：2026-01-21
- 摘要：Effect of nitrogen blowing time (0-50 min) , nitrogen partial pressure (35-100 kPa) , nitrogen blowing rate (total flow rate 0.3 L/min ,N2：Ar=1 ：3〜3：1) , liquid temperature ( 1773-1833 K) on nitrogen content in 0.8 kg liquid of austenite stainless steel 316L (% ：0.031C, 16.13Cr, 10.12Ni, 2.12Mo) has been studied by using corundum crucible-silicon-molybdenum rod electric resistance furnace in laboratory. Results show that with increasing nitrogen blowing time and nitrogen partial pressure the nitrogen content in steel increases ； with increasing blowing nitrogen rate the time that nitrogen content in liquid comes up to saturation value reduces and with decreasing liquid temperature the dissolvability of nitrogen in steel increases. Analysis on test results is carried out by using thermodynamics and kinetics models.关键词：Nitrogen Blowing;Stainless Steel 316L;Thermodynamics Model;Kinetics5|0|0更新时间：2026-01-21
- 摘要：A mathematical model for 14. 5 t tundish casting 160 mm x 160 mm billet at Shougang is established and the numerical calculation of flow and temperature of liquid in shape tundish for 4-strand is calculated by using fluid dynamic software Fluent to get the flow speed field, temperature field and residence time distribution curves of liquid in tundish. Calculation results show that the maximum temperature difference between each strand is 8 K, therefore the lower overheating extent liquid shall be avoided； besides the percentage of dead volume of No l strand is 20% little larger than that other strands ( 10% 〜12% ) , the flow parameters of liquid in tundish meet the requirement for casting operation.关键词：160 mm X 160 mm Casting Billet;Tundish;Mathematic Simulation;Residence Time Distribution Curves;Temperature Field3|0|0更新时间：2026-01-21
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- 摘要：As compared with carbon metallurgy, a concept of non-carbon metallurgy to combine solar energy, wind power and metallurgy technology is advanced to expound the idea of non-carbon metallurgy with photo-wind complement each other. Non-carbon metallurgy technology includes 4 unit technologies- photo-electricity transformation, storage cell, electric power distribution and control unit and metallurgical reactor. Test of non-carbon metallurgy is carried out by a 1 kg non-carbon metallurgy test furnace system designed with technology integration and bring forth original ideas, and system parameters are verified by preliminary energy analysis on the system. Test results show that melting temperature more than 1 600 °C is gotten by directly using the technology of photo-wind complement each other to melt various metals.关键词：Non-Carbon Metallurgy;Photo-Wind Complement Each Other;Steelmaking at High Temperature2|0|0更新时间：2026-01-21
- 摘要：A study on basic characteristics of baked EAF dust including chemical composition, X-ray diffraction detection ,and particle-size distribution has been carried out. Based on thermodynamic principles of iron oxide and zinc oxide redaction , the concept of fine reduction of EAF dust is put forward. The effect of temperature (910 ~ 1 010 °C ) and reduction time (2 ~4 h) on ratio of metallization and ratio of de-zinc to EAF dust, and the variance analysis and correlation analysis on test results have been carried out by using Statistical Product and Service Solutions (SPSS) software. Results show that TFe content and Zn content in EAF dust are respectively 47. 26% and 8. 32% ； at 910 ~ 1 010 °C the iron oxide and zinc oxide transforming to MFe and zinc is realized with using pure to fine reduce EAF dust, and the ratio of metallization and ratio of de-zinc are respectively 95% and 98% ； and the phenomenon of sintering EAF dust fine reduction product has not occurred.关键词：EAF Dust;Fine Reduction;Ratio of Metallization;Ratio of De-zinc2|0|0更新时间：2026-01-21
- 摘要：Several kinds of solution modes are presented which integrate intelligent control technology ( FC-fuzzy controller, ANN-artificial neural network and GA-genetic algorithm) with traditional proportional plus integral plus derivative (PID) control model and are applied for electrode regulator of AC arc furnace to realize electrode control parameter optimization and current decoupling. The application prospects and development trend of intelligent PID control electrode regulator for AC arc furnace are summarized.关键词：交流电弧炉;电极调节器;PID控制;智能控制;参数优化;解耦3|0|0更新时间：2026-01-21
- 摘要：Key R & D field for high strength ship plate steel in resent years including low temperature toughness, excellent corrosion resistance, weldability with high heat input welding and antifatigue performance of steel has been summarized in article. The characteristics of research and development of new high strength ship plate steels and key technologies to produce typical high strength plate steel are presented. At present the trend of development of ship plate steels is to produce high strength-toughness, excellent corrosion resistance and manufacturing performance ship plate steel by using low C, high Mn, multicomponent microalloying technologies combining with control rolling-cooling and surface technologies.关键词：High Strength Ship Plate Steel;Microalloying;Toughness;Weldability;Control Rolling-Cooling;Research and Development2|0|0更新时间：2026-01-21
- 摘要：The electrode of René88DT nickel allov ( % ： 0.02 ~ 0.05C. 15.5 ~ 16.5Cr, 3.8 ~4.2Mo, ≤0.20Ta, 12.5 ~13.5Co，0.6~1.0Nb, 0.025 ~0.050Zr, 3.5~3.9Ti, 2.0〜2.4AI, 0.006〜0.015B, 3.8〜4.2W, 0.005 ~ 0.010Ce) is melted by a 200 kg vacuum induction furnace and the Φ160 mm x 220 mm René88DT alloy ingot is melted by a 500 kg shielding atmosphere drawing-out ingot electroslag remelting furnace with continuously directional solidification process according to requirement of solidified structure to determine the melting speed during remelting by controlling secondary dendrite area space in ingot solidification, metal bath shape and depth and to get relative remelting parameters by thermal equilibrium calculation. Results show that the relative error between calculated total remelting time and real remelting time is only 4.5% , the bath is hallow lo get fine solidified structure with whole 〈100〉 direction columnar structure and secondary dendrite area space- 60 〜80 μm关键词：电渣重熔连续定向凝固;René88DT 基合金;凝固组织控制;工艺参数2|0|0更新时间：2026-01-21
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Designing Characteristics of Annealing and Pickling Line for 16 mm Hot Rolled Stainless Steel Strips
摘要：The process flow sheet, key equipment and technology characteristics for maximum coil weight 35 t, 2 ~ 16 mm hot rolled stainless steel strip annealing and pickling line are presented. The steel grades produced in the line are austenite ,ferrite and martensite stainless steel； the strip is heated in annealing furnace by natural gas, the furnace temperature is up to 1 180 °C and the total furnace length is 96 m； the effective descaling is carried out before pickling, the pickling solutions are sulphuric acid and nitric acid + hydrofluoric acid, the maximum speed of pickling is 60 m/min, the waste water and waste acid are recovered and regenerated, and the acid mist are also recovered and treated.关键词：Hot Rolled;Stainless Strip;Annealing;Pickling3|0|0更新时间：2026-01-21 - 摘要：The 150 mm x 150 mm casting billet of bearing steel GCr15 is produced at Jiyuan Iron and Steel Co by using 601 top and bottom combined blowing converter melting with carbon catch operation to control converter end [C] 0.08% ~0.20% , ladle bottom argon blowing and adding aluminium-iron in ladle during tapping for oxidation, using CaO- Al2O3-SiO2high basicity slag in LF refining, controlling casting liquid overheating degree 20 ~ 30 ℃ , M + F electromagnetic stirring, whole process argon shielding casting and casting billet stacking slow cooling process. Practice results show that the oxygen content in bearing steel GCr15 is (6.3 x 11.9) x 10-6average oxygen content is 9 x 10-6and the macro structure of casting billet is better.关键词：60 t BOF-LF (VD)-150 mm x 150 mm Casting;Bearing Steel GCr15;Process Practice2|0|0更新时间：2026-01-21
- 摘要：In consideration of easier nozzle clogging and difficult control of bloom quality for casting pipe line steel X52 ( % ： 0.14~0.18C, 0.30〜0.50Si, 1.25〜1.40Mn, ≤0.025P, ≤0.025S, 0.03~0.06Nb) in casting by square round bloom caster, the pipe line steel X52 is produced with using the technoiogy including according to carbon content in liquid adding 200 ~ 500 kg/heat Fe-Al deoxidizer at tapping of BOF, refining by high basicity slag (% :%:≥70CaO、≤5Al2O3、≤5SiO2、≥5CaF2、≤5MgO、≤0.05N) in LF process, and soft blowing argon for 5 min after refining. Results show that the average desulphurization rate is 37% , in steel the S ≤0.011 % and P ≤0.015% , the surface quality of Φ200 mm round bloom is nice and the rating of each item of macro-etch test is less than rating 1.0关键词：Pipe Line Steel X52;BOF;LF Refining;Φ200 mm Round Bloom Casting2|0|0更新时间：2026-01-21
- 摘要：The metallurgical effects of solid-core calcium wire (99.35% Ca) and CaFe wire (30.53% Ca) feeding during 160 t, 230 t and 300 t LF refining process have been compared and analyzed. The average acid soluble aluminium, sulphur content and temperature of liquid before and after feeding solid-core pure calcium are respectively 0.036% , 0.010% , 1587 ℃ and 0.029% , 0.008% , 1584 °C. As compared with feeding CaFe wire, with feeding solid-core calcium wire the yield of calcium increases by 10% , the feeding wire amount decreases by 50% , the feeding wire time reduces by 2 ~ 3 min and the temperature drop of liquid decreases by 3 ~5 ℃ ,it has obvious metallurgical effect.关键词：LF Refining;Calcium Treatment;Sol id-Core Calcium Pure Wire;CaFe Wire4|0|0更新时间：2026-01-21
- 摘要：Analysis on surface upwarp defects of hot rolled plate of high strength alloying steel Q345E produced by 120 t converter-RH-CC melting process has been carried out by using scanning electron microscope and optical microscope, and it is found that there are ferroferric oxides, residuum of mold shielding slag and secondary oxides in micro-regions of upwarp, and in the upwarp regions the arrangement of ferrite and pearlite is out of order, and the proportion of ferrite is higher than normal with serious decarburization. Further found the main reason for formation of surface upwarp defects of hot rolled plate is the higher argon flow rate in tundish which leads to bubble wrapping slag into liquid and forming subskin blowhole of casting slab, re-oxidizing in heating to form oxide scale then being pressed in plate during rolling. The occurrence rate of upwarp defects decreases from 3. 86% to 0. 8% by adopting the process measures including decreasing argon flow rate in tundish from 65 L/min to 50 L/min and adjusting casting speed from 1.0 m/min to 1.2 m/min.关键词：Surface Upwarp;Argon Gas Flow;Slag Entrapping;Subcutaneous Blowhole;Stability2|0|0更新时间：2026-01-21
- 摘要：Steel 35MnB is melted by 40 t EAF-LF-VD-180 mm x 180 mm billet CC arc furnace flow sheet and 100 t BOF-LF-RH-200 mm x 200 mm billet CC Converter flow sheet. The requirement of technical specifications for steel 35MnB is end-quenching hardenability J19 HRC value is 33 〜41. Examination results show that the JI9 HRC value of steel 35MnB produced by arc furnace flow sheet is 25 〜28, and the J19 HRC value of steel 35MnB produced by converter flow sheet is 36 ~ 41. The end-quenching hardenabilities of steel 35MnB produced by arc furnace flow sheet and converter flow sheet have been compared and analyzed. It is obtained by analysis that the average N content in steel 35MnB produced by arc furnace reaches (80 ~ 90) x 10-6and that produced by converter is (45 ~ 50) x 10-6the high N content in EAF steel influences the effect of B to improve hardenability of steel products, in order to ensure the end-quenching properties of steel products, the N content in steel should be controlled ≤50 x 10-6关键词：EAF-LF-VD-CC;BOF-LF-RH-CC;N Content;Boron Steel 35MnB;End-Quenching;Hardenability2|0|0更新时间：2026-01-21
- 摘要：The production flow sheet for Φ500 mm casting bloom of 0.20% C steel (0.19% ~ 0.23% C) is 70 t BOF-LF-VD-Φ500 mm heavy round caster. The study and optimization work on mechanical equipment and process parameters including secondary water cooling parameter have been carried out. In first pilot production with continuous casting 8 heats of 0.20% C steel, the optimizing parameters including using special mold powder, controlling liquid overheating extent 25 ~35 °C , casting speed 0.30 m/min, secondary water rate 0.14 L/kg, mold electromagnetic stirring 400 A/1.5 Hz are used. The examination results show that the bloom surface has not visible defects including bulging, feather defect； the rating of center line shrinkage is 0.5 and the rating of center porosity is 1 , the carbon segregation is ≤1.12, and the oxygen content in steel ≤15 x 10-6nitrogen content in steel ≤65 x 10-6to meet the requirement of design.关键词：Φ500 mm Round Casting Bloom;Pilot Production;0. 20% C Steel;Production Practice2|0|0更新时间：2026-01-21
- 摘要：The steelmaking flow sheet for two heats non-oriented silicon steel XG800WR (/% : 0.003 ~ 0.004C, 0.71 〜0.75Si, 0.32~0.33Mn, 0.004 ~ 0.007S, 0.016P) is hot metal pretreatment ( KR)-210 t top and combined blown converter-ladle argon blowing-RH decarburization refilling-230 mm X 1 220 mm slab casting. The superheating extent of liquid in 53 t tundish is 25 ~ 30℃whole casting is shielded by blowing argon with long nozzle from ladle to tundish and the submerged nozzle is adopted in casting from tundish to mold. Examination results show that the total oxvgen content T[O] in liquid and the amount and size of inclusions in steel obviously decrease during RH, tundish and mold process, but the T[O] , [N] and amount of inclusions increase from ladle to tundish process, it indicates that there is secondary oxidation of liquid in casting process with long nozzle. The T [O] and [N] in casting slab are respectively 11 x 10-6and 30 X 10-6the average amount of micro-inclusions is 4 inclusions per square mm. The main micro-inclusions in casting slab are 3 ~5μmAIN with minor MnS, Al2O3• AIN and Al2O3• MgO • MnS.关键词：BOF-RH-CC Non-Oriented Silicon Steel;Cleanliness;T[O];[N];Inclusions4|0|0更新时间：2026-01-21
- 摘要：Metallurgical flow sheet for production of WB36 steel tube (%： 0.16C. 0.46 ~0.47Si, 1.02 ~ 1.05 Mn , 0.008 〜0.010P, 0. 001S, 0.29 ~0.30Mo, 1.17〜1.20N、0.58Cu, 0.02M), 0.05Al) is 45 t EAF-LF-VD-Φ600 mm casting bloom-piercing, Φ600 m×70 mm-Φ720 Pilger mill rolling. With controlling heating atmosphere in circular rotating furnace, temperature at soaking zone 〜1 250℃piercing temperature 1 100 °C , then blank lube tolling with three-dimensional stress by Pilger Mill, the structure of quenched-tempered WB36 steel tube is ferrite + bainite, its mechanical properties at ambient and elevated temperature, and weldability all meet the requirement of EN10216-2 standard.关键词：WB36 Steel Tube;Large Caliber;Pilger Rolling;Research and Production2|0|0更新时间：2026-01-21
- 摘要：The mechanical properties of 70 mm x 1 250 mm slab of steel SPHC (% : 0.02C, 0.18Mn, 0.03Si, 0.04Als) at 600 ~ 1 350 ℃ have been studied by Gleeble thermal simulation machine and the fracture of tensile specimen is analyzed by scanning electron microscope and energy dispersive X-ray spectrometer. Results show that the I brittle zone and the III brittle zone of thin slab of steel SPHC are respectively at 1200 °C ~ solidus and at 600 ~ 850 ℃ , the plasticity of thin slab is best at 850 〜1200 °C ； the specimen at temperature in the III brittle zone is fractured along grain boundary ； and the inclusions in grain boundary and lamellar ferrite formed in γ to α phase transfomiation lead to brittleness of grain boundary and decrease of plasticity of material in the III brittle zone.关键词：Steel SPHC;Thin Slab;Mechanical Properties at High Temperature4|0|0更新时间：2026-01-21
- 摘要：The fracture splitting properties of forged slab of microalloying steel F38MnVS (/% : 0.37C, 1.32Mn, 0.18Si, 0.008P, 0.060S, 0.12Cr, 0.12V) for traditional connecting rod and the fracture splitting properties of forged slab of microalloying steel C70S6 (/% : 0.72C, 0.57Mn, 0.32Si, 0.020P, 0.060S, 0.17Cr, 0.03 V) for fracture splitting connecting rod have been compared and studied. Results indicate that the fracture splitting properties of steel C70S6 are obviously better than that of steel F38MnVS. The main structure of steel C70S6 is lamellar pearlite with a little ferrite, and the splitting section is mainly brittle fracture to meet the requirement of fracture splitting technology.关键词：Microalloying Steel C70S6;Structure;Fracture Splitting Properties;Brittle Fraciure2|0|0更新时间：2026-01-21
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