最新刊期
卷 26 ， 期 6 ， 2005
- 摘要：The wire for steel cord of tyre is a high carbon steel(0.70~0.75C-0.15～0.30Si-0.40～0.60Mn), which is widely applied to auto tyre and conveyer belt industries because the rubber products stengthened with 40.15~ 0.38 mm steel cord has excellent strength and springiness which is available to increase the safety of car and decrease fuel expenses. Due to requirement of high quality on wire for steel cord of tyre, in general the process flow sheet :converter or arc furnace- LF- VD or RH-Ca treatment- concasting is adopted to produce the steel.The control of chemical compositions, gas content and inclusion is presented and the general conditions of production,quality requirement and development trend of wire for steel cord of tyre at home and abroad are summarized in this paper.关键词：钢帘线钢;质量控制;生产工艺;发展5|1|0更新时间：2026-01-21
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A Study on Distribution Characteristics of Electromagnetic Field in Concasting Mould for Round Bloom
摘要：In condition of commercial production at Maanshan Steel, with electric current parameter within limits 400 ~ 510 A and 2.0 ~ 2.5 Hz, the distribution characteristics of magnetic induction intensity in concasting mould with M-EMS for 8380 mm round bloom has been measured by using Gauss-meter. Hie results showed that the curve of magnetic induction intensity along vertical direction of mould center had a peak shape and the maximum value was at M-EMS stirrer center and a distance 530 mm from top of mould; and it increased gradually from center to edge at mould horizontal section. The magnetic induction intensity at meniscus was about 10% of that maximum value at mould middle section. Hie analysis shows that in the present production conditions at Maanshan Steel the stirring intensity with using electric current parameter 400 A/2.5 Hz is not enough.关键词：圆坯;连铸;结晶器;电磁搅拌;磁感应强度10|0|0更新时间：2026-01-21 - 摘要：Hie stress-strain curves of 0.006 7C-0.045 0Ti Ti-IF (interstitial free) steel with deformation temperature 750 - 900 °C and deformation rate 0.1 - 40-1has been tested and obtained Ihennecmaster-Z thermal simulation test machine, based on that the relational expression between Zener-Holloman parameter Z and deformation rate ε - temperature T (K) ： Z= e exp (39 507/T) is defined, and the critical strain fonnula for relation between critical strain ec and original grain size Z parameter： ec= 2.314 4 x 10-3X d-0.8003 9×Z0.050is established. The results showed that with same deformation rate the dynamic recrystallization of steel occurred most easily at 850 ℃, as deformation temperature increased to 900 °C (dual phase region) , the dynamic recrystallization un-occurred even at low deformation rate (1 s-1) , and as deformation rate was more than 10 s-1the dynamic recrystallization of Ti-IF steel also un-occurred during hot rolling. With comparison between predicted value of critical strain and measured value, the average error was no more than 5 % .关键词：Ti-IF钢;铁素体变形;动态再结晶;临界应变模型3|0|0更新时间：2026-01-21
- 摘要：Using similitude principle and hydrokinetics theory, the water simulation and mathematic simulation of molten steel flow condition in ladle furnace (upper and bottom diameter- 2 310 mm and 1 984 mm, height of ladle furnace- 2 620 mm, porous block diameter- 104 mm) have been carried out by conductivity testing and Phoenics software. The test and results showed that the molten steel flow pattern and mixing time at 2#blowing location (520 mm from ladle bottom center) was more idea than that at 1#blowing location (354 mm from ladle bottom center) ； and as argon flow rate no more than 300 L/min, with increasing blowing rate the mixing time decreased, as aigon flow rate more than 300 L/min, with further increasing blowing rate the mixing time no longer change. The results of 40 t BOF-LF-CC production showed that with using optimum process the total oxygen content in steel decreased by 2x 10-6to 15.2 X 10-6and the amount of inclusion in steel decreased obviously.关键词：钢包炉;吹氩;流动;模拟;优化4|0|0更新时间：2026-01-21
- 摘要：The test and study on dephosphorization of 0.12～0.40C,10.06～18.89Cr,0.60～11.00Ni molten stainless steel at refining temperature between 1853 K and 1893 K has been carried out in a 5 kg medium frequency induction furnace with MgO crucible by using 45~65BaO,35～55BaF₂,3~7 Cr₂O₃ slag series. The test results showed that the phosphorus content in molten high chromium stainless steel in refining period decreased to 0.013% from 0.029% by using the test slag series,the dephosphoriing ratio was more than 20%;and as(BaO)/(BaF₂)was 60/40,initial silicon content in steel ≤0.08%,refining temperature ≤1600℃ (1873K) and initial [Cr]%≤15%,the beter dephosphorization effect of molten high chromium stainless steel could be obtained.关键词：High Chromium Stainless Steel;BaO-BaF?-Cr?O?Slag Series;Refining;Dephosphorization3|0|0更新时间：2026-01-21
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Thermodynamic Calculation and Analysis on Equilibrium Phases Transition in T122 Heat-Resistant Steel
摘要：The thermodynamic equilibrium phases in T122 heat-resistant steel (0.11 ~ 0.12C, 11.37 ~ 11.97Cr, 1.90〜1.93W, 0.38Mo, 0.86 〜0.90Cu, 0.05Nb, 0.19- 0.20V, 0.58- 0.67N, 0.002 3 〜0.002 8B) and the effect of alloying element Cr, Al, Ti on S ferrite and major precipitated phases at temperature between 820 °C and 1 200 °C have been studied by Thermo-Calc software. The results show that there is a large amount of S ferrite in T122 heat-resistant steel and the main precipitated phases in steel are ， Laves phase and MX, At temperature between 950 °C and 1 050 °C the amount of S phase is lowest, of which the content is 15.7% ~ 18.9% .The initial precipitated temperature for M23C6is 940 °C , for Laves phase is 750 °C , but for MX is more than 1 250 °C which is a very stable phase. It is found that chromium has a great influence on formation of 8 ferrite and has minor influence on that of precipitated phases; to lower Al and Ti content is available to decrease 3 ferrite amount and increase MX phase amount.关键词：T122高铬耐热钢;Theimo-Calc软件;δ铁素体;析出相3|1|0更新时间：2026-01-21 - 摘要：The retaining ring is an important component of turbogenerator. The high deformation stress-strain curves of three kind of retaining ring steel-0.53C- 16.98Mn-3. 17Cr(1),0. 12C- 19.57Mn- 19.27Cr-0.60N(2)and 0.06C- 18.58Mn- 19. 15Cr-0.69N(3)and the high temperature plasticity- reduction of area of containing nitrogen retaining ring steel at temperature 800~1200 ℃ have been studied by Gleeble- 1500 thermal simulation machine. The results showed that with increasing nitrogen content in steel,the critical deformation value for dynamic recrystallization increased in order to gradually increase corresponding deformation force; the maximum reduction of area of containing nitrogen steel was at 1050 ℃,and the high plastic deformation region shrunk with increasing nitrogen content in steel. Therefore modifying deformation model to increase process plasticity is an available way to increase the quality of retaining ring.关键词：Nitogen;Mn18Cr18N Steel for Retaining Ring;Mechanical Properties at High Temperature3|0|0更新时间：2026-01-21
- 摘要：The high strength free-cutting precipitation hardening stainless steel 2Cr16Ni3Mo2CuN has excellent cutting property in annealing conditions. The Brinell hardness(HB)number of steel 2Cr16N3Mo2CuN treated by first annealing at temperature between 710 ℃ and 800 ℃ and second annealing at temperature between 570 ℃ and 620 ℃ and the mechanical properties of steel treated with 1050~1085 ℃ for 45 min oil cooling,-70 ℃ for 2 h and 150 ℃ or 170 ℃ tempering have been studied. The test results showed that HB number of steel 2Cr16Ni3Mo2CuN treated with 710~740 ℃ for 5 h + 620 ℃5 h was less than 321 and tensile strength σbof steel was ≥1520 MPa,δ5≥12% and impact energy AKU≥40 J. The steel 2Cr16Ni3Mo2CuN showed obvious secondary hardering effect and the peak temperature range of this effect was between 480 ℃ and 520℃.关键词：易切削;高强度;沉淀硬化不锈钢;热处理;力学性能6|0|0更新时间：2026-01-21
- 摘要：The ulra low carbon bainitic steel ULCB570(0.02C- 1.55Mn-0.62Ni-0.53Cu-0.0035B-0.055V-0.019Ti- 0.028Nb was melted by a 50 kg vacuum induction furnace in laboratory,of which the 25 mm finished plate was rolled from forged 80 mm slab with beginning rolling temperature 1150 ℃,finishing temperature 900 ℃ and air cooling. The continuous cooling transformation curves of deforming austenite was measured by a Thermecmaster-Z thermal simulation machine. The results showed that the structure of steel deformed with cooling rate 0. 1~30 ℃/s was bainite-ferrite + secondary phase (precipitates);the tensile strength on of steel as rolled condition was 595 MPa,impact toughness AKV180 J,of which as rolled + 600 ℃ aged condition the tensile strength σbof steel increased to 610 MPa, impact toughness AKVto 202 J to meet the requirement for properties of 570 MPa steel plate.关键词：超低碳, 贝氏体钢;控轧, 连续冷却转变, 组织;机械性能2|0|0更新时间：2026-01-21
- 摘要：The first pass hot rolling process of compact strip production of 1 500 mm x 68 mm thin slab at Baotou Iron and Steel has been simulated by Marc commercial software with the aid of elastic-plastic thermal-mechanical coupled finite element method (FEM) . And the distribution and change of equivalent stress field, strain field and strain rate of rolling stock deforming region were analyzed. The results showed that in rolling stock deforming zone the equivalent stress gradually increased along the direction of rolling and came to maximum value (95.20 MPa) nearby neutral face, than gradually decreased; the equivalent strain also gradually increased along the direction of rolling and came to maximum value (0.70) at outlet of workpiece; and the equivalent strain rate had a maximum value nearby surface at inlet of workpiece that was 20.74 s-1. The rolling force simulation-calculated was 22 203 kN, which measured at situ was 22 239 kN, so the prediction error was 0.16%.关键词：CSP;Thin Slab Hot Rolling;Thermal-Mechanical Coupling;FEM;Simulation Analysis2|0|0更新时间：2026-01-21
- 摘要：The structure of TRIP(transfornation induced plasticity)steel 0.20C- 1.08Si- 1.43Mn during continuous cooling has been studied by Gleeble- 1500 thermal simulation machine to get CCT( continuous cooling transforation)curves and to obtain that the bainite particle occured with cooling rate 10 ℃/s and the lath bainite got with cooling rate 15 ℃/s. The thin slab casting and rolling process test of 0.20C- 1.54Si- 1.55Mn TRIP steel melted by a 10 kg vacuum induction furnace with ingot dimension 60 mm×100 mm×130 mm was carried out in laboratory which was rolled to 6.40 mm plat by 7 pass rolling with finish rolling at temperature 810 ℃,and air cooling to 700 ℃ than water cooling to 400 ℃ to simulate coiling. The test results showed that there was 5. 13% retained austenite,37.20% bainite and the rest-ferrite in structure of steel,of which the mechanical property- σbwas 715 MPa,σs520 MPa,ratio of yield strength to tensile strength 0.73 and elongation δ 20%.关键词：C-Si-Mn TRIP钢;动态 CCT 曲线, 组织, 力学性能2|0|0更新时间：2026-01-21
- 摘要：The effect of strain temperature and strain rate on critical deformation and dynamic recrystallization during single pass deformation at strain temperature between 1000 ℃ and 1100 ℃ and strain rate 1~10 s-1and the effect of strain temperature and inter-pass time on static recrystallization at temperature between 950 ℃ and 1050 ℃ and strain rate 10 s-1during double pass rolling of a microalloyed steel Q345E:0.084C- 1.05Mn-0.026Nb-0.003Ti-0.007Mo-0.003V have been studied by a Thermecmaster-Z thermal simulation machine. The test results showed that during single pass deformation the higher strain temperature was contributed to recrystallization of steel but the higher strain rate speeded up hardening of steel;during double pass deformation with prolonged inter-pass time and increased strain temperature,the static recrystallization percent increased.关键词：Microalloyed Steel Containing Nb;Thermal Deformation Simulation;Stress-Strain Curve2|0|0更新时间：2026-01-21
- 摘要：The structure evolution of a Nb-microalloyed extra-low carbon steel 0.03C- 1.05Mn-0.6Cr-0.08Nb during 1200 ℃ heating,then cooling to 850 ℃ and reducing 50%,holding at 850 ℃ for 20~1000 s fast cooling to 450 ℃,air cooling has been simulated and tested by Thermecmastor -Z thermal simulator. The test results showed that with increasing holding time after reduction 50%,the amount of acicular ferrite and bainite in steel and the dislocation density in structure decreased,where the size of martensite-austerite(M-A)island increased; As the holding time after reduction 50% was more than 50 s, the micro hardness(Hv10)value quick decreased but that more than 500 s the Hv10 hardness value decreased slowly.关键词：超低碳, Nb微合金化, 控轧控冷, 热模拟;组织演变2|0|0更新时间：2026-01-21
- 摘要：Based on research of main composition alloying principle for hot working die steel,the studied new precision casting hot working die steel was melted by a 250 kg medium frequency induction furnace and the wearing test on test steels at 400 ℃ was carried by MG2000 high temperature friction-wear testing machine. The research results showed that according to the principle of V/C-3.0,Cres-0. 1%～0.2%,Cr/(Cr+Mo)-0.68~0.85,Cr/Cres->16.6,Mo/Cres->16,a designed new precision casting hot working die steel-0.32C,3.54Cr,2.41Mo,1.02V had higher high-temperature wear resistance,of which the high-temperature wear rate at 400 ℃ was 30% that of 0.45C- 5.3Cr- 1.4Mo-0.83V hot working die steel H13 and was 20%～25% that of 0.37C-2.48Cr-7.82W-0.41V die steel 3Cr2W8V.4|0|0更新时间：2026-01-21
- 摘要：The superplastic duplex austenitic-ferritic stainless steel-0.021C,24. 16Cr,7.21Ni,2.87Mo,0. 17N, 0.48Cu has been developed by arc furnace + electroslag remelting process. The test results showed that the pitting erosion resistance and the crevice corosion resistance of superplastic duplex stainless steel 00Cr25Ni7Mo3N were much more higher than that of traditional austenite stainless steel 304L and 316L. The maximum elongation of superplastic duplex stainless steel 00Cr25Ni7Mo3N at 960℃ with strain rate 2×10-³/s was 960%,and the uniformity during superplastic deformation of the duplex steel was higher than that of titanium alloy TC4 to obviously decrease the weight of component.3|0|0更新时间：2026-01-21
- 摘要：Through practice of bearing steel producing by hot metal pre-desulfurization - 100 t top and bottom combined blown converter - Ar stirring - LF(VD) - billet concasting process, it was obtained that with melting end point carbon between 0.2% and 0.6% , the oxygen content in steel was between 50 X 10-6and 150 X 10-6by deoxidation in tapping, Ar stirring and LF(VD) refining, the total oxygen content in molten steel in tundish was between 14 x 10-6and 16 x 10-6and was less than 12 X 10-6in cast billet. The analysis results show that it is available to further decrease the total oxygen content in bearing steel by intensifying bath stirring to make steel-slag enough react, and controlling BOF tapping slag amount less than 5 kg/t steel, intensifying Ar stirring, and controlling LF top slag basicity between 2.0 and 2.5 and (FeO) + (MnO) less than 0.5% .关键词：100t顶底复吹转炉;轴承钢;氧含量;控制4|0|0更新时间：2026-01-21
- 摘要：An 100 t AC shaft are furnace with transformer rating capacity 60~ 72 MVA was put into production at An- yang Steel in November 1999.With adopted the operation technology such as charging about 33% hot metal,shaft preheating temperature of scrap between 400 ℃ and 600°℃,oxygen-oil burner and water cooling oxygen jet operation and OBT tapping(taping amount 110 t),the electric power consumption of arc furnace has decrease to 220 kWh/t,the operation rate is up to 92%,average tap-to-tap time 41 min,the annual output over one million to obviously decrease production cost.2|0|0更新时间：2026-01-21
- 摘要：The 150 mm×150 mm billet of carbon and alloy constructional steel,high carbon steel and welding rod steel casts by R9 m 4 strand concaster at Shiheng Special Steel Works. Through optimized secondary cooling process modified 0.5~0.8 MPa water pressure,0.80~1.30 L/kg water ratio and 3 section manual water cooling process to 0.20～0.30 MPa water pressure,0.25～0.75 L/kg and automatic(water + gas)- water cooling process, the middle crack and bulging defects were eliminated and the rhomboidity,dispersed shrinkage and shrinkage cavity defects decreased by 50%～80%.2|0|0更新时间：2026-01-21
- 摘要：The hot plasticity(reduction of area)of steel 60Mn-0.61C,0.74Mn,0. 18Cr was carried out by Gleeble-2000 dynanic themmo mechanical simulator using solidifying method. It was obtained that there were two low ductility regions at high temperature - more than 1300 ℃ and 925~750 ℃.At temperature between 925 ℃ and 750 ℃,the nitride AlN and NbN precipitated at γ grainboundary and the procutectoid α- phase was distributed as net shaped in y+ a two phase region.With optimized process the Als in steel decreased to ≤0.010% from original ≤0.015%,by intensifying VD degas- sing and shielding casting practice the[N] decreased to 40×10-⁶ from 60×10-⁶,and with overheating temperature of molten steel decreasing to ≤35 ℃ from ≤50 ℃,water ratio decreasing to 0.30 L/kg from 0.40 L/kg,lowering cast straightening force and keeping surface temperature of billet ≥900 ℃ before straightering,the rating of billet porosity decreased,the equiaxed zone ratio increased to 51.3% from 45.7% before optimized and internal crack ratio decreased to 1.7% from 5.2%,the quality of billet obviously improved.2|0|0更新时间：2026-01-21
- 摘要：The Φ8 mm~12 mm rod coil of 0. 19~0.24C,1.50~1.70Mn steel 20Mn2 was produced by an 80 t DC UHP EBT are furnace-ladle furnace(LF)- 150 mm×150 mm concasting- high speed rod rolling mill process at Hangzhou Steel. During LF refining,the soluble aluminium in steel was controlled between 0.020% and 0.025% with feeding Silicon- calcium wire and argon stiring full period, in concasting the long nozzle was adopted and the over heat of liquid steel was between 25 ℃ and 35 ℃,therefore the cleanliness of steel was higher that the total oxygen content in steel was between (22~31)×10-⁶ and the inclusion rating was ≤2.0.With controlling beginring rolling temperature between 950 ℃ and 980 ℃,finishing temperature between 820 ℃ and 860 ℃,and after rolling delay cooling process the grain size of steel was 8~10 class,yield strength 620~650 MPa,tensile strength 835~875 MPa,elongation 15%～18% and hardness(HB)of hot rolled products 175~195 to meet the requirement of standard and service.2|0|0更新时间：2026-01-21
- 摘要：The 0. 17~0.23C-≤0. 15Mo steel 20G for high pressure boiler is melted by a 92 t UHP EBT EAF-LF process at Chengdu Iron and Steel,Pan Steel Group. The operation practice showed that 35% pig iron in charge for arc furnace,adding 3~10 mm carbon particle and stengthening supply oxygen to form 500~750 mm foaming slag were available to remove partial nitrogen in molten steel,as a consequence the average nitrogen in steel came to 45×10-⁶ at arc furnace tapping. During LF refining, the operation of large amount slag embedding arc, weak argon stiring and cutting-down heating time was adopted to control the increment of nitrogen in steel no more than 10×10-⁶ in refining period.The nitrogen content in steel after refining in LF was(60~66)×10-⁶,that was efficiently to prevent aged brittleness of steel products.2|0|0更新时间：2026-01-21
- 摘要：The 230mm×230 mm×1350 mm LZ50 steel billet for vehicle axle is produced by quality hot metal pretreatmnent - 120 t converter melting and SiAlBaSrCa combined deoxidiing- ladle refiring with Si-Ca powder injection + RH- TB vacuum degassing- 5 t ingot casting - rolling process. The production results showed that due to controlling C content be- tween0.47%～0.50%,Si0.20%～0.35%,Mn0.71%～0.85%,both P,S in steel ≤0.02%,average[H]=1.77 ×10-⁶,average [O]=12.22×10-⁶,the LZ50 steel billet had excellent macro structure and constant mechanical properties, and the quality of products was up to the requirement of TB/T2945 standard.关键词：顶底复吹转炉, LF+RH-TB 精炼, 轴坯钢LZ50,& 冶金质量4|0|0更新时间：2026-01-21
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