最新刊期
卷 32 ， 期 2 ， 2011
- 摘要：According to the situation of over-high S content in deep drawing hot rolled DDQ class SPHE strip steel (%: ≤O. 07C, ≤0. 03Si, 0. 20 〜0. 30Mn, ≤0. 020P, ≤0. 010S, 0. 02 ~0. 06Als) produced by 100 t BOF-argon stir- ring-LF-RH-Ca treatment flow sheet, the effect of CaO/SiO2A12O3and MgO on refining slag sulfur partition ratio Ls is analyzed by KTH sulfur capacity model and the desulphurization model of CaO-MgO-SiO2-Al2O3quaternary slag series is established to optimize the ingredient of LF refining slag for desulphurization. Results show that after using optimizing refining slag (%: 50CaO, 6MgO, ≤5SiO230 - 35Al2O3), the desulphurization ratio of LF refining liquid steel is ≥80%, the ±5% error between prediction value by model and measured value makes up ≥80% of total prediction value.2|0|0更新时间：2026-01-21
- 摘要：Based on established finite element model with rolling parameters including roller diameter I 160 mm, rolling speed 1 000 ~ 3 000 mm/s, slab size (mm) 150 X 1 550 x 2 520, the simulated calculation on folding of medium and heavy plate of steel Q235 has been carried out by using finite element software ABAQUS/Explicit and effect of rolling speed, temperature difference of rolling stock (30 ~ 70 ℃ ) , reduction of rolling stock (12-22 mm) on flatting amount of head of rolling stock is analyzed. It is obtained that with increasing temperature difference, rolling speed and reduction of stock the flatting amount of head of rolling stock increases and the folding defect shall be occurred in following rolling process, in order to decrease folding occurrence the larger temperature difference between top and bottom surface of stock should be avoided ,and as the temperature difference is larger it is available to roll by using small reduction and low rolling speed.关键词：Medium and Heavy Plate;Folding;Bending Down;Flatting;Finite Element Simulation2|0|0更新时间：2026-01-21
- 摘要：Based on refining data of 110 t ladle refining furnace at Xinyu Steel Works, the prediction models for alloys adding amount and end analysis during refining of low carbon microalloying steels in ladle furnace have been established. 50 heats refining results show that the prediction results for adding amount of Xinyu Nol medium carbon chromium alloy and molybdenum iron alloy is basically accurate and the degree of accuracy for prediction value of end analysis of Cr and Mo in steel is more than 95%.关键词：Low Carbon Microalloying Steel;Ladle Furnace;Alloys Adding;End Analysis;Prediction Model2|0|0更新时间：2026-01-21
- 摘要：According to the studied system of liquid steel, refining slag and alloy in 120 t LF refining process, based on energy-balance principle model the prediction model for temperature of refining liquid steel has been established. According to steel grade, liquid weight and temperature, aim tapping temperature and treated time, adding amount of refining slag material and alloys as well as various heat loss to get required input electric energy, the reasonable electric supply curves during refining are determined. And the temperature of liquid is predicted according to parameters of electric supply and process at worksite. Examination results on 20 heats steel 50RH1 (% ： 0. 48C ~ 0. 50C, 0. 22 ~ 0. 30Si, 0. 60 - 0. 70Mn) show that the error of temperature of liquid between model predicted value and measured value are ±5℃.关键词：LF Refining;Temperature of Liquid;Prediction Model2|0|0更新时间：2026-01-21
- 摘要：The three dimensional thermal mechanically coupled simulation on alloy steel 42CrMo4 roiling in box pass has been carried out by using LARSTRAN/SHAPE finite element software. The local variables including equivalent stress, equivalent strain, equivalent strain rate and temperature distribution etc during rolling are simulated incrementally by viscoplastic finite element method to calculate the dynamic recrystallization and grain size after each discrete time step. It is obtained by simulation that with initial rolling temperature ≥1 050°C , the percentage of dynamic? recrystallization for hot rolled steel 42CrMo4 increases. In steel 42CrMo4 production the available initial rolling temperature is 1 050 〜1 100 °C.关键词：42CrMo4钢;热轧;动态再结晶;有限元模拟4|0|0更新时间：2026-01-21
- 摘要：Four grades of super-purifying ferritic stainless steel 409LI, 439M , 460LI and 470LI without containing Ni and Mo are pilot-produced by using a new 150 t VD/VOD unit with EAF-AOD-VOD three steps process at AST, ThyssenKrupp. Production practice shows that the refining operation cycle time of EAF-AOD-VOD three steps process is obviously less than that of EAF-VOD two steps process to realize the process goal for production of super-purifying ferritic stainless steel with low cost； and the corrosion resistance and heat resistance of produced new generation super-purifying ferritic stainless steel AST460LI (% : ≤0. 010C, 21. 0 ~21. 4Cr,≤0. 002S, 0. 10-0. 20Ti) and AST470LI (% : ≤0. 007C, 23. 8 ~24. 2Cr, ≤0. 002S, 0. 10 〜0. 20Ti) are higher than that of standard austenitic stainless steel 304 (% : W0. 08C, 8.0~11.5Ni, 18.0-20. OCr) and 316 (% ：≤ 0. 08C, 10. 0 ~ 14. ONi, 16.0 〜18. OCr, 2.0-3. OMo).4|0|0更新时间：2026-01-21
- 摘要：According to related typical patent technology for grain-oriented electrical steel sheets, the recent trends and progress situation for production process of grain-oriented electrical steel sheets with high magnetic flux density and low core loss in Japan are summarized including low temperature slab heating, suitably regulating inhibitors,.adjusting and utilizing key element Mn, C, Sn and Sb, manufacturing for new annealing agent and insulating solutions, and fining magnetic domain, and some suggestions are put for domestic grain-oriented electric steel producer to apply for a patent.3|0|0更新时间：2026-01-21
- 摘要：The effectiveness of development and application of quality control integration technology for concasting 260 mm x300 mm bloom of alloy steels produced with 50 t EAF-LF(VD)-CC flow sheet at Laiwu Steel is briefly presented. The quality of concasting bloom is improved by development of process control technologies including suitable bloom cleanliness and protection casting, secondary cooling equipment design for dynamic control of secondary cooling, precision parameters integration optimization, and on-line prediction and qualification system for bloom quality with hot charging process. The examination qualified rate of pickled macrostructure of rolled steel products increases from 97. 50% in 2007 to 99. 01% in 2009, the qualified rate of bloom is more than 99.92% , the yield of products increases from original 96. 50% to 96. 80% , and the hot charging rate raises from 45% to 75%.关键词：260mm×300mm连铸坯, 合金钢;50t EAF-LF(VD)-CC流程, 质量控制, 集成技术4|0|0更新时间：2026-01-21
- 摘要：The steel 12MnV with ≤0. 003% S is produced by operating such as adding lime in LF, controlling aluminum content at end of LF, injecting 80CaO-20CaF2powder in RH process and feeding aluminium wire at end of RH, and feeding calcium-silicon wire after RH process. The desulphurization data show that during the 110 t EAF-LF-RH-CC flow sheet the LF average desulphurizing efficiency is up to 88% , the RH average desulphurizing efficiency is less than 30% ; during steelmaking process for steel deoxidizing by aluminium, in non-feeding aluminium wire condition, with decreasing S content the Al content in steel decreases； and it is favourable for RH desulphurization, as there is sufficient Al in steel to dioxidize before RH process.2|0|0更新时间：2026-01-21
- 摘要：The production flow sheet for steel TL1114Nb (% ：0. 07 - 0. 13C, 0. 80 - 1. 25Mn, 0. 10 〜0.30Si, ≤ 0.010P, ≤0.010S, 0. 03 〜0.05Nb, 0. 02 〜0. 07All) is 100 t UHP arc furnace-LF (VD)-150 mm x 150 mm billet casting-continuous rolling process. Examination results show that by using reasonable heating temperature for rolling ( 1 100 ~ 1 200 ℃ ) , suitable increasing finishing rolling temperature (780 ~ 820℃ ) and coiling temperature (700℃ ) , controlling cooling speed after rolling ( spraying water for 4 s, fan cooling) , all the various indexes of properties of hot rolled strip steel TL1114Nb are qualified i. e. strip grain size rating 10 ~ 10. 5 , structure- ferrite + pearlite without abnormal structure, strip yield strength Rel440 -460 MPa, tensile strength Rm530 - 550 MPa, elongation A 31. 5% - 33. 0% , cokl-bending ( d=a) test qualified.关键词：100t EAF-LF(VD)-CC-连轧流程;铌微合金化;热轧带钢;汽车后桥横梁钢;开发2|0|0更新时间：2026-01-21
- 摘要：According to structure and operation parameters of a 32 t tundish for 150 mm X 150 mm 6-strand concasting billet at steelmaking workshop, Shuicheng Steel, the effect of gas curtain technology on characteristics of liquid flow in tundish and removal rate of inclusion particles in steel has been studied by using mathematical simulation method, and the commercial test for casting HPB235 and 65 C steel is carried out. Results show that the gas curtain weir is available to improve flow situation of liquid, balance residence time at each outlet, effectively prolong the residence time of liquid in tundish, decrease dead zone volume and increase removal rate of inclusion particles. This technology is suitable to meet the requirement for cleanliness steel steelmaking with tundish for multi-strand casting.关键词：Tundish;Gas Curtain Weir;Mathematic Simulation;Optimization;Commercial Practice2|0|0更新时间：2026-01-21
- 摘要：Poor fluidity of casting liquid of steel GCr15 mainly shows that the liquid in ladle doesn't flow out or the flow rate of liquid in nozzle of tundish is small. The steelmaking statistic data show that with increasing concasting heats average [A1] (0.01% to 0. 03% ) , decreasing [Ti] (0.003% to 0.007% ) and increasing Mn/Si (1. 45 to 1.60) in steel the fluidity of liquid increases, besides, the longer LF refining period (80 min) and lower superheating extent (25℃ ) is unfavourable to increase the fluidity of liquid. Improving the cleanliness of liquid, suitable increasing ； [Al]and Mn/Si, controlling refining time and superheating extent of liquid in tundish is effective to improve the fluidity of liquid of steel GCrl5.关键词：GCr15钢;钢水流动性;重接;夹杂物;中间包水口2|0|0更新时间：2026-01-21
- 摘要：The effect of [P] , [S] , [Mn]/[S] and process factors including superheating degree of liquid on center cracks of 160 mm x 200 mm rectangular billet of 45C Steel (0. 44% 〜0. 50% C) has been classified, counted and analyzed. According to analysis results the process measures including controlling [P]≤0. 020% , [S]≤015% , [ Mn]/ [S]≥40, superheating degree ≤25 , and optimizing secondary cooling water rate with casting speed 1. 8 m/min are a- dopted, as a result the occurring rate of center cracks decreases from original 82. 76% to 22. 41% and that more than rating 1 decreases from original 22. 41% to 0. 51% .关键词：45钢;160mm×200mm矩形连铸坯;[Mn]/[S];二次冷却2|0|0更新时间：2026-01-21
- 摘要：The Φ80 〜130 mm round bar products of wheel body steel 40Mn2H-S (% : 0. 39 ~0. 41C, 0. 21 -0. 26Si, I. 55 ~ 1. 60Mn, 0. 025 ~0. 035Al) are produced by 50t EAF-LF (VD)-260 mm x300 mm continuous casting-rolling process at Laiwu Special Steel. With EAF charging-50% hot metal + scrap, adding 1. 5 ~2. 5 kg/t steel aluminium cladding steel during taping, adjusting [Al] in 0. 020% ~0. 040% during LF taping by feeding Al wire, whole casting process with shielding atmosphere and casting with ( M + F) EMS, the average of [ 0] and [ N ] are respectively lowered to 14. 5 x 10-6and 72 x 10-6the rating of macrostructure of steel ≤1. 0, rating of nonmetallic inclusions A and B ≤1. 5 , C and D ≤1.0, grain size rating ≥7, the terminal hardenability and mechanical properties of steel all meet the requirement of user.2|0|0更新时间：2026-01-21
- 摘要：The effect of heating history- temperature change in cooling process of concasting slab and in heating process (300 ~ 1 320℃ ) of cold slab, strain rate (3 ~3 x 10-4s-1) and cooling rate ( 1 ~ 20 ℃/s) on hot ductility of 250 mm x 1 300 mm concasting slab of steel Q345C has been studied by using Gleeble-2000 thermal/strain simulation testing machine. Results show that cooling from 1 320 ℃ to IH brittle zone, the higher cooling rate the lower hot ductility of steel in Ⅲ brittle zone； at 600 ~850℃ , the hot ductility of concasting slab with cold charge practice is better than that with prctice of direct cooling from liquid to this temperature region ； and in Ⅲ brittle zone of steel, with increasing deformation rate the hot ductility of steel becomes better.3|0|0更新时间：2026-01-21
- 摘要：The metallurgical process flow sheet for U71 Mn heavy rail steel ( % : 0. 66 ~0. 76C, 0. 15 ~0. 35Si, 1. 10 - 1. 40Mn, ≤0.03OP, ≤030S) is 100 t converter-LF (VD) -280 mm x 380 mm bloom continuous casting. The [N] of each procedure from converter to tundish and effect factors, and the effect nitrogen content on mechanical properties of rail steel have been studied. Results show that with increasing nitrogen content in steel from 54 x 10-6to 94 x 10-6the fracture toughness of rail decreases from 34. 7 〜38. 1 MPa mi1/2to 28. 1 -31.5 MPa ml/2. During LF refining, as recarburizing agent anthracite is used to replace original asphalt coke, it is available to control nitrogen content in steel ≤64 x 10-6the average nitrogen content is 50. 9 x 10-6关键词：U71 Mn High Speed Heavy Rail Steel;Nitrogen Content;Fracture Toughness2|0|0更新时间：2026-01-21
- 摘要：The new Ni-Cr-Fe nickel base alloy ( % ： 0. 036 ~ 0. 044C, 16. 71 ~ 17. 10 Cr, 63. 04 ~ 63. 95Ni, 8. 98 〜 10. 76Fe, 2.50〜2.88Mo, 2.01 ~4.97Nb, 0. 06V, 0. 74 ~0. 82Al, 2.00〜2.06Ti) is melted by a 25kg vacuum induction furnace and forged to Φ15 mm and 14 mm x 14 mm bar products. The effect of niobium content on structure and mechanical properties of the 65Ni~18Cr-10Fe alloy has been studied by busing scanning electron microscope, X-ray diffractometer, chemical phase analysis and tensile tester. Results show that with increasing niobium content in alloy, the precipitated amount and dimension of γ′、γ″ and η phase increase, of which the morphology changes from discontinuous particles or short clubs to long lamellae led to increment of ambient tensile strength of alloy and decrease of plasticity.关键词：镍基合金;铌;力学性能;析出相2|0|0更新时间：2026-01-21
- 摘要：The effect of finishing temperature (840 Y and 860 °C ) , quick cooling to different temperature (730 ~ 630 °C ) and holding time (5 ~ 10 s) on ferrite transformation of DP600 hot-rolled dual-phase steel ( % :≤0. 1C, ≤1.5Si, ≤1.5Mn, ≤0. lOAIs, ≤0. 50Cr) with finishing rolling deformation 60% has been studied by using Gleeble-1500 thermal simulator. Results show that with increasing holding time and decreasing finishing temperature it is obviously to promote the ferrite transformation and to increase the volume fraction of ferrite in steel ； as the holding temperature at first quick cooling drops to 630 °C from 730 °C , the volume fraction of ferrite in steel increases by about 20% and the tensile strength of steel decreases by about 60 MPa.关键词：DP600 Hot-Rolled Dual-Phase Steel;Themial Simulation;Ferrite Transformation5|0|0更新时间：2026-01-21
- 摘要：Effect of 900 Y soaking + 500 °C patenting for 54 s, air cooling treatment on structure and properties of cold drawn wire of 70 steel (0. 67% ~0. 75% C) with 38. 9% reduction from Φ5. 5 mm hot rolled wire has been studied. Results show that with 500℃ patenting treatment the inoculation and transformation time of under-cooling austenite of the steel is shortest, the tensile strength and elongation of steel wire increase respectively by 21. 4% and by 9. 5% to establish the foundation for further increasing the comprehensive mechanical properties of steel wire by finishing fine drawing process.关键词：70 Steel Wire;Patenting;Structure;Properties2|0|0更新时间：2026-01-21
- 摘要：The hot ductility of 150 mm x 150 mm casting billet of 10B15 cold heading steel (% ： 0. 17C, 0. 16Si, 0. 46Mn, 0. 017P, 0. 025S, 0.000 2Ti, 0.000 8A1, 0.001 4B) with strain rate 0.000 5 -0. 001 s-1at 700 1 000 ℃ has been studied by using Gleeble-1500 thermal simulator. Results show that the casting billet of 10B15 cold heading steel has hot brittleness at 850 ~ 900 °C ； the dynamic recrystallization is promoted by decreasing strain rate led to increase of hot ductility ； the nitrides of B, Ti and Al precipitate at grain boundary to take pin pinning effect on grain boundary to hinder slide of boundary and occurrence of dynamic recrystallization led to decrease of the hot ductility of steel.关键词：10B15冷镦钢;150mm×150mm连铸坯;高温塑性;动态再结晶2|0|0更新时间：2026-01-21
- 摘要：The effect of normalizing treatment at 950 〜1 200 °C on mechanical property and 5% NaCl salt spray corrosion resistance at 35℃ of 2 mm annealed cold rolled. sheet of steel 5Crl5MoV (% ： 0. 50C, 14. 16Cr, 0. 66Mo, 0. 12 V, 0. 39Ni) has been studied. Results show that as normalized at 950 ~ 1 150℃ with increasing temperature the carbide in steel reduces, while the hardness of steel increases； as normalized at 1 200 °C there is definite amount of residual austenite in matrix of steel led to a decrease of hardness of steel ； and as normalized temperature is higher than 1 100 °C the corrosion resistance of steel decreases easily to occur grain-boundary attack. Therefore, it is available to get higher hardness and better corrosion resistance by normalizing at 1 135 ℃.2|0|0更新时间：2026-01-21
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