最新刊期
卷 32 ， 期 1 ， 2011
- 摘要：Comparison between the metallurgical characteristics of 41 ~45 t original circular ladle and new-type ladle has been carried out by using geometric similarity ratio 1：3.4 water model and the optimum location of argon blowing is obtained. Results show that for original ladle the height-diameter ratio is rather large, the mixing time is longer and the process isn't stable ； and for new ladle the height-diameter ratio decreases and the mixing time reduces obviously. While it is found that the blowing effect of single porous brick is better that of double porous bricks at new-type ladle bottom. Production practice indicates that with using new-type ladle the mixing time after adding carbon powder decreases from original 8 ~ 10 min to 4 min, the nozzle auto-open pouring ratio increases from 80% to more than 95%, and the large inclusion occurrence ratio in steel products decreases from original 3% to 1. 5%.关键词：新型钢包;钢液流动;水模型;混匀时间2|0|0更新时间：2026-01-21
- 摘要：Based on similarity theory, according to a 28-t prototype 3-strand T-type tundish for casting Φ380 mm bloom, the effect of flow control devices on characteristics of flow field in tundish in casting conditions of casting speed- 0. 3 - 0. 9 m/min and liquid level-600 ~ 1 200 mm has been studied by using experimental similarity ratio λ= 1： 2 water model. Results show that in condition of tundish liquid level about 500 mm in commercial production status, with casting speed <0. 4 m/min, the effect of flow control devices on flow field characteristics is not obvious i. e. it is not needed to locate flow control devices ； with casting speed≥0. 4 m/min and < 0. 7 m/min, it is available to using tundish located weirs; and with casting speed ≥0. 7 m/min, the structure of weirs with turbulent inhibitor is favourable to be used to optimize the characteristics of flow field in tundish. It is obtained by analysis on flow field in tundish that to locate flow control devices the disorder degree of pouring flow should be decreased as far as possible and the turbulent energy of liquid flow is depleted as much as possible in pouring region.2|0|0更新时间：2026-01-21
- 摘要：Based on works rolling process of 4300 mm medium-heavy plate of low carbon steel Q235 (C ≤0. 20% ) the elastic-plastic finite element model is established by using the finite element software ABAQUS/Explicit to simulate and calculate the general rolling process and MAS (Mizushima automatic plan view pattern control system) rolling process for medium-heavy plate with spread ratio 1. 70 and finishing rolling elongation 7. 87, and the comparative analysis on different deformation stages is carried out. Results show that the plane shape of rolled medium-heavy plate is obviously improved by using MAS rolling method, its changed value in shape is directly related to the setting parameters at MAS rolling stage, and the MAS rolling optimum parameter i. e. △L×△h= 300 x3 is obtained by comparing the rolling results using different MAS parameters.2|0|0更新时间：2026-01-21
- 摘要：The dephosphorization effect of hot metal with initial 0. 61%Si and 0. 06% ~0.09%P by 0 ~8% B2O3to replace 0 ~8% CaF2in 40% CaO-52% Fe2O3metal pre-treating slag at 1 450℃ has been studied by MoSi tube high temperature furnace. Test results show that with B2O3to replace CaF2, the oxidizing ability of pre-treating phosphorescing slag increases, the efficiency of dephosphorization of metal is more than 80% by substituting slag and the phosphor capacity of slag decreases slightly from original 9. 35 x 1021to 7. 48 x 1021it is available to meet the requirement of pre-treating dephosphorization.2|0|0更新时间：2026-01-21
- 摘要：The effect of nitrogen partial pressure (33 ~ 100 kPa), nitrogen blowing time (0 ~50 min), nitrogen rate (0. 3 L/min) and liquid temperature (1 773 ~ 1 833 K) in normal atmosphere condition on nitrogen content in steel 316L (% ： 0. 31C, 16. 13Cr, 10. 12Ni, 2. 12Mo, 0. 028N) has been studied and the behavior of nitrogen absorption in steel 316L with nitrogen blowing for 40 min, 2 kPa, 0. 1 L/min at 1 853 ~ 1 833 K in initial vacuum condition, nitrogen blowing for 40 min, 100 kPa, 0. 3 L/min in middle period and nitrogen blowing for 50 min, 100 kPa then natural cooling to 1 773 K in last period is tested by using silicon-molybdenum furnace with graphite crucible containing 0. 8 kg steel liquid. Results show that with increasing nitrogen blowing time and nitrogen partial pressure the nitrogen content in steel increases, the nitrogen content in liquid is more than 0. 10% as nitrogen blowing for 10 min in normal atmosphere, with increasing nitrogen rate the time that come to saturated nitrogen in liquid decreases and with decreasing temperature of liquid the solubility of nitrogen increases. The analysis on nitrogen absorption is carried out by thermodynamic and dynamic models.4|0|0更新时间：2026-01-21
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Formation Mechanism and Countering Measures for Transverse Surface Crack of Continuous Casting Slabs
摘要：The formation mechanism for transverse surface crack of continuous casting slabs is analyzed and delved from three aspects- No3 brittle zone, oscillation mark and segregation. It is obtained that the brittlement of steel at No3 brittle zone is not enough to explain the formation of transverse surface crack, the segregation and the factors leading to stress concentration such as oscillation marks and inclusions are also taken into account. On this studied basis the measures to prevent the transverse surface crack of slab are discussed and simply summarized including controlling casting slab straightening temperature, precipitates at grain boundary, cooling rate at secondary cooling zone and C% in low carbon steel; improving oscillation amplitude and taper of mold, and mold powder； decreasing S and P content in steel, increasing Mn/S, decreasing cooling speed at mold meniscus and improving mold surface roughness factor.3|0|0更新时间：2026-01-21 - 摘要：The continuous extrusion cladding technology is a new plastic making process developed based on continuous extrusion technology, of which the billet piece is dragged in by extrusion wheel at effect of friction force, turned with wheel and deformed, extruded in mould to clad the steel core in mould cavity and get cladding product. The service temperature of extrusion wheel is 200 ~ 250℃ and the highest temperature at surface of wheel trough is up to 590℃. The service conditions and main failure form of extrusion wheel, basic requirement for properties and chemical composition of steel for extrusion wheel, its status of research and development trend at home and abroad are presented in this article.2|0|0更新时间：2026-01-21
- 摘要：Concasting process factors to form the cold rolled coil defect related slag entrapment have been analyzed. Results show that with production of low carbon aluminium-killed steel by 150 t converter-argon blowing station-LF-CAS or RH-(900 ~ 1 020)mm x210 mm casting process, the defect index of hot rolled plate with nozzle merging depth 130 ~ 155 mm is far less that with nozzle merging depth 125 mm and 160 mm； the average total oxygen content T[O] in steel with ladle nozzle self-open and oxygen lance open is respectively 15 x 10-6and 25 x 10-6slag entrapment defect index of hot rolled plate decreases obviously by using slagging detector to control slagging amount from ladle to tundish. The index of slag inclusion-skin defect of hot rolled plate decreases from original 3. 45 to 0. 73 by controlling amount of liquid in tundish, improving nozzle structure of tundish, optimizing merging depth of submerging nozzle, increasing ratio of ladle self-open and operating ratio of control tundish slagging amount detector, and using low sodium mold powder.关键词：连铸;板卷夹渣类缺陷;工艺控制2|0|0更新时间：2026-01-21
- 摘要：The section size of casting bloom to roll 60 kg/m heavy rail of steel U75V (%: 0.71 ~ 0. 80C, 0. 50 - 0. 80Si, 0. 70 ~ L 05Mn, 0.04 -0.12V, 0. 23Cu) is 380 mm x280 mm and the section area of rolled piece out of second stand rougher mill is 18 015 mm2. A finite element model is established by rolling deformation test and microscopic observation and measure combining with technical parameters at production situs to study and analyze the effect of rolling deformation on depth of decarburized layer of heavy rail. It is obtained that as the bloom is rolled by primary stand mill and second stand rougher mill, decarburized layer of rail head decreases to 0. 53 mm from 1.2 mm, decarburized layer of rail waist decreases to 0. 54 mm from 1. 5 mm and decarburized layer of rail bottom decreases to 0. 83 mm from 1. 5 mm. The measured decarburized layer of finished rail head is 0.2 mm.关键词：重轨;轧制;脱碳层;有限元法2|0|0更新时间：2026-01-21
- 摘要：In order to increase the converter production capability, with optimization of converter oxygen supply schedule- oxygen lance level and charging mode, basic lime and dolomite amount according to different Si content in metal and bottom blowing process, and control tapping temperature, the converter end point first percentage of hits increases from 89. 5% to 95. 45% to decrease times of reblow； the average end [ N] decreases to 35 x 10-6and by virtuous turnover of ladle and reasonable control of tap time, the temperature of liquid is ≥1 560℃ as ladle at refining station.关键词：顶底复吹转炉;吹炼;工艺优化2|0|0更新时间：2026-01-21
- 摘要：The process flow sheet to melt microalloying pipeline steel X80 is 300 t top and bottom combined blowing converter-ladle argon blowing and microalloying-LF-RH. With converter gas-dynamic slag stopper to control tapping slag a- mount ≤4 kg/t； ladle top and bottom blowing argon blowing for 6 min with aluminium bullet shooting； controlling LF top slag CaO/Al2O3= 1. 7 -1.9, basicity of slag (CaO/SiO2) = 4. 5 ~6 and (FeO + MnO) ≤l. 0% ； with feeding FeCa wire 0. 8 kg/t during RH refining process, the T [O] is decreased to 13 x 10-6the inclusion size ≤10 μm and the ≤5 μm inclusions account for 98. 93% of the total inclusions, and the A12O3spinel inclusions are modified to CaO-MgO-Al2O3series ternary inclusions. The inclusion amount, size, morphology and ingredient of inclusions during melting process are analyzed to get the modification regulation of inclusions in pipeline steel.关键词：管线钢;转炉-钢包吹氩-LF-RH工艺;夹杂物控制2|0|0更新时间：2026-01-21
- 摘要：The statistics and analysis on temperature condition of IF steel liquid in current 210 t top and bottom combined blown converter-RH-slab casting process condition at Qian An Iron and Steel Co have been carried out, and the math model for change of liquid temperature during RH treatment process is established in accordance with the effect of RH initial temperature of liquid and crape adding amount on temperature reduction of liquid during RH treatment process. It is obtained that the total temperature reduction of liquid from converter tapping to initial casting is 162. 52°C including the average temperature reduction 79. 54 °C. from converter tapping to RH station, 39. 10 °C during RH process, 44. 58 °C leaving RH station to tundish ； and the temperature reduction of liquid during RH process can be predicted reliably by using multiple regression analysis.关键词：IF钢;转炉-RH-连铸流程;钢水温度;数学模型2|0|0更新时间：2026-01-21
- 摘要：The effect of 300 t converter-RH refining calcium treatment on inclusions in non-oriented silicon steel sheet (%： ≤0.005C, 1. 2 ~2. 2Si, 0. 2 ~0. 6Mn, ≤0. 20P, ≤0. 005S, 0. 2 ~0. 6 Al, 0 ~0. OlCa) has been studied by electrolysis and scanning electron microscope. Results show that with 0. 25% and 0. 35% Al content in steel, all the dissolved oxygen in liquid is less than 1 X 10-4%, and the CaS inclusions are produced after calcium treatment, especial for the liquid containing 0. 35% Al； the amount of inclusions in steel is sharply decreased by calcium treatment process especially for less than 0. 5 μm tiny inclusions; the main inclusions after calcium treatment are AIN and CaS with minor oxide inclusions and AlN-CaS compound inclusions, and the size of most inclusions is 1. 5 ~5. 0 μm .2|0|0更新时间：2026-01-21
- 摘要：Competitive oxidation of Al and Ti and the modification of inclusions in steel have been studied by aluminium deoxidation and calcium treatment test of 0. 007% -0. 015%C- 15.96% ~ 16. 94% Cr- 0. 08% ~0. 36%Ti- 0. 015% ~ 0.124% Al ferrite stainless steel liquid in a 500 kg vacuum induction furnace and relative thermadynamics calculation. Results show that as [Ti]/[Al] is less than 2. 50, the main oxide inclusions are A12O3with increasing [Ti]/[Al], the main inclusions in steel change to MgO-Al2O3-TiOxand A12O3-TiOxfrom Al2O3and the average dimension of inclusions gradually decreases； after calcium treatment with increasing [Ca]/[Al] (0. 01 -0. 08), the amount of compound inclusions containing calcium in steel increases; the compound inclusion consists of oxide core and TiN or Ti(CN) periphery.2|0|0更新时间：2026-01-21
- 摘要：Large-Scale Electroslag Furnace R&D Center, Northeastern University (Shenyang Dongda Xingke Metallurgical Technology Co Ltd) has designed and manufactured a 120-t large electroslag remelting furnace with advanced new idea. The mode of 3 sets of single-phase transformers, 3-stands, 3-pilars + double electrode series with cross arm rotating is adopted for the unit. The crystallizer consists of two separated parts assembled and piled up. The liquid pressure transmission is used in all mechanical running system. The PLC web-net control is adopted in whole control system and the intelligent control is used to control remelting speed, weighing, current, voltage and automatically changing electrodes etc. The equipment met the requirement of design to get excellent metallurgy effects in pilot and commercial production.2|0|0更新时间：2026-01-21
- 摘要：Material for test of hot rolled steel sheet pile SY390BZ (% ： 0. 23C, 0.44Si, 0.91Mn, 0.06V, 0.010P 0. 002S) is melted by a 55 kg vacuum induction furnace, cast to Φ170 mm round ingot, rolled to 12 mm sheet with 20% reduction in last flat pass and finishing rolling at 880 〜900 °C, air cooling. The tough-brittle transition temperature of test steel is measured and the morphology of low temperature impact fracture and structure of steel at 20 °C to - 60 °C is observed by using scanning electro-microscope Quanta 400 and optical microscope Olympus GX71. Results show that there are a lot of large equiaxial dimples in fracture at ambient temperature and the steel has higher impact energy (130 J), while there are smaller shallow dimples in fracture at -40 °C and the impact energy of steel decreases to 30 J. The tough-brittle transition temperature of the steel calculated by using energy calculation method is -30 °C。 The banded structure with A12O3inclusion occurs in steel led to lower impact toughness.关键词：热轧钢板桩SY390BZ;低温冲击韧性;带状组织2|0|0更新时间：2026-01-21
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Dynamic Observation and Analysis on Austenite Grain Growth and Inclusions in Nb-Bearing Spring Steel
摘要：The behavior of austenite grain growth of Nb-bearing spring steel 60Si2MnNb (%: 0. 57C, 1. 60Si, 0. 76Mn, 0. 34Cr, 0. 022Nb) during heating at 950 ~ 1 250℃. in vacuum has been observed by using high temperature microscope, and the curve of coarsening process is fitted by Arrhenius equation to get the austenite grain growth dynamic curve； and an analysis on occurred second phase particles has been carried out by using scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). Test results show that the grain coarsening temperature of Nb-bear- ing steel 60Si2MnNb is 1 050℃ it is higher that of steel 60Si2MnA by 100℃; the occurred second phase particles in steel are nonmetallic inclusions.关键词：含铌弹簧钢;高温金相;晶粒粗化;夹杂物, 分析2|0|0更新时间：2026-01-21 - 摘要：The structure and properties of Φ280 mm forgings of steel Q345D (%: 0. 18C, 0.41Si, 1. 34Mn, 0. 05Nb, 0. 08V, 0. 024Al) after quenching + tempering treatment and nominalizing treatment have been tested and studied. Results show that with 890 ℃. air cooling for 200 s, then water cooling + 570℃ tempering the steel tensile strength Rm is ≥630 MPa, yield strength Reis ≥455 MPa and impact energy AKVat -20℃ is 28 ~40 J； with normalizing at 910 °C air cooling, the RmReand -20 °C AKV of steel are respectively ≥575 MPa;≥390 MPa and 42 ~59 J, all the mechanical properties meet the requirement for rudder stock product ； the structure at depth 30 mm from surface of quenched-tempered rudder stock piece is tempered sorbite + granular bainite, at center it is pearlite + minor granular bainite, and all the structure at surface and center of normalized rudder stock piece is pearlite + ferrite.关键词：舵杆;Q345D钢;微合金化;热处理;组织;力学性能2|0|0更新时间：2026-01-21
- 摘要：Influence of test ambient temperature (10-30 °C), sample mass (642 ~ 667 g) and shearing stress (shearing 1 -5 times) on magnetic properties of different grade 0. 27 ~0. 50 mm oriented and non-oriented cold-rolled silicon steel sheet produced at home and abroad has been analyzed by using test system for magnetic properties of silicon steel sheet. Results show that with raising ambient temperature the iron loss and magnetic induction of cold-rolled silicon steel sheet decrease； with increasing sample mass the iron loss increases and the magnetic induction decreases ； and with increasing shearing times the iron loss progressively increases and the magnetic induction progressively decreases. The suitable conditions and attention items for test magnetic properties are summarized in this article.关键词：冷轧硅钢片;磁性能;测试温度;试样质量;剪切应力2|0|0更新时间：2026-01-21
- 摘要：Studied both grain-oriented silicon steels (%: Nol- 0. 042C, 3. 16Si, 0. 009Al, 0. 07Mn, 0. 50Cu, 0.015S, 0.008 4N and No2- 0.040C, 3.20Si, 0.014A1, 0. 22Mn, 0.49Cu, 0. 016S, 0.008 2N) are melted by a 50 kg vacuum induction furnace, foiled to (mm) 350 x 120 x35 slab, heated at 1 250 ℃ for 30 min, with beginning rolling temperature 1 100℃. hot-rolled to 2.3 mm plate by 5 passes, finishing-rolled at 950 ~ 1 000 ℃. Test results show that the structure and texture along thickness of both hot-rolled plates are inhomogeneous: the subsurface layer is recrystallized structure which has a high Goss texture ； the central layer is deformed structure which has typical deformation texture. The subsurface layer {110} 〈001〉texture component in 0. 22% Mn No2 steel plate is weaker than that in 0. 07% Mn Nol steel plate, while the central layer {001} 〈110〉 texture component is greatly intensive than that in 0. 07% Mn Nol steel plate, led to difference of magnetic properties between both plates, the magnetic induction （B800）and iron loss (P1.7/50) of 0. 22% Mn No2 steel plate are respectively 1. 87 T and 1. 24 W/kg, while that of 0. 07% Mn Nol steel plate are respectively 1. 88 T and 1. 18 W/kg.关键词：取向硅钢;低温板坯加热;热轧板;织构2|0|0更新时间：2026-01-21
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