最新刊期
卷 27 ， 期 1 ， 2006
- 摘要：It is available to produce high speed steel by rationally using abundant tungsten,molybdenum and vanadium ore resources in China and comprehensively applying high and advance technologies such as smelting reduction,electroslag remelting and microalloying so as to attain the goal economically utilizing these resources, increasing metallurgical quality,decreasing energy consumption,shortening process flow sheet and improving environment. In the meantime the production base to produce pit tool,die and cold-rolling roller of high speed steel according to international standards should be established to meet the steady increasing requirement of domestic manufacturing industry and to change resources export for products export in international market.6|0|0更新时间：2026-01-21
- 摘要：The effect af V content in compound addition of 0. 14~0.31V-0.05Nb on structure and properties of ferrite heat resistant steel 0. 11C- 11.89~12. 19Cr- 1.86～1.90W-0.37～0.38Mo-0.9Cu has been studied.The research results found that with V content increasing,the volume fraction of δ ferrite in steel increased,while the tensile strength at ambient temperature and at 650 ℃ and creep rupture strength at 650 ℃ gradually decreased; and the tensile strength at ambient temperature and the tensile strength and creep rupture strength at 650 ℃ of T122 steel contained 0. 19V were higher. The change of V content influenced precipitation behavior of Ma Ce,MX and Laves phase insteel,where the precipitated strengthening effect of 0. 19V-0.05Nb was best.2|0|0更新时间：2026-01-21
- 摘要：With electromagnetic brake (EMBr) numerical simulation, the semi-quantitative method to analyze the impact of molten steel to inner wall and initial solidified shell in (900 ~ 1 600) mm x (50 ~ 70) mm mould has been presented .The numerical simulation results showed that with EMBr the impact point of steel flow in mould at narrow face went up by 40% , and the impact intensity of up-flow and down-flow decreased by 86% and 10% respectively, it was available to avoid the solidified shell re-melting so as to reduce the solidification defect such as transverse crack. The commercial test results showed that with EMBr the temperature of molten steel at meniscus in CSP ( Compact Strip Production) mould increased by 5.8 °C , it was favourable to flux at surface of molten steel2|0|0更新时间：2026-01-21
- 摘要：The grain size,texture,iron loss and magnetic induction of 0.5 mm 0.003C- 1.6Si non-oriented silicon steel cold rolled sheet annealed at 850~1000 ℃ have been studied.The test results showed that with annealing temperature increasing the average grain size increased from 23 μm at 850 ℃ to 115 pm at 1000 ℃,the iron loss decreased from 4.36 W/kg at 850 ℃ to 3.35 W/kg at 1000 ℃;and the magnetic induction was up to maximum value 1.732 T at 920℃, with annealing temperature further increasing the magnetic induction gradually decreased to 1.717 T at 1000 ℃关键词：无取向硅钢 退火温度 磁性能 晶 粒 织 构3|1|0更新时间：2026-01-21
- 摘要：The heat transfer behavior and temperature variation rule of molten steel during RH-MFB secondary refining process was analyzed and a model for forecasting temperature of molten steel has been established to simulate the actual process by a programmed software. The forecasting results of temperature of 9 heats molten steel in 300 t ladle RH-MFB refining showed that the error of molten steel temperature calculated and measured was less than±10℃ . According to requirement of aim temperature to implement compensated measures can effectively control the molten steel temperature2|0|0更新时间：2026-01-21
- 摘要：The solidified film structure, mineralogical phase and crystallization rate of 1537 mm×67 mm mould pow- der(34.6CaO,28.6SiQ₂,8.8C,8.5F,8.6Na₂O)for Compact Strip Production(CSP)have been studied by optical and scanning electron microscope and X-ray diffraction analysis. The results showed that most of the solidified flux films had three layers with total thickness 0.6~1.3 mm:crystallizing layer - glassy layer - crystallizing layer,of which the thickness of crystallizing layer at the side near mould was 0.10～0.14 mm; the crystallization rate of CSP solidified flux film was 40% ~80%,and the crystallized mineralogical phases were cuspidine(3CaO ·2SiO₂ ·CaF₂)and mineralogical phase Na₂O · Al₂O₃ · SiO₂ .The thermal transformation shall be controlled by adjusting the thickness of solidified flux film and crystallization rate of cuspidine in the film to increase the surface quality of concasting slab关键词：CSP结晶器保护渣, 固态渣膜, 析晶率, 结晶矿相2|0|0更新时间：2026-01-21
- 摘要：The effect of 10% pre-deformation on aging dynamic behavior of an ultra-low-carbon-bainitic steel 0.042~ 0.045C- 1.43～1.48Mn-0.30～0.33Si-0.70～0.73Ni-0.29～0.30Mo-0.025～0.029Nb-0.011～0.019Ti,0.0013~0.0023B containing 0.98~2.90Cu at temperature 450 ℃ and 550 ℃ for 1~104min.The test result showed that the peak hardness of e-Cu precipitation dynamic curves occurred during ageing of steel; as the steel was pre-deformed the time occurred peak hardness of e-Cu precipitation obviously decreased and the value of peak hardness increased appreciably. The effect of pre-deformation was more evident for steel aging at 450 ℃关键词：超低碳贝氏体钢, 时效,e-Cu沉淀&预变形2|0|0更新时间：2026-01-21
- 摘要：The as cast structure and forged structure and mechanical properties of semi-high speed steel 16Cr5D- 0.50~0.56C,0.36～0.39Mn,0.95～1.03Si,5.34～5.68Cr,0.31～0.41Ni,1.00～1.04Mo,0.29～0.30V quenched at 880～1060 ℃ and tempered at 200~750 ℃ melted by a 20 kg medium frequency induction furnace has been tested and studied. The test results showed that the optimum quenching temperature was 970~1000 ℃,the second hardening of the steel was obvious as tempered at 500 ℃,and the quenched and tempered steel had excellent comprehensive mechanical properties. Therefore the steel is a nice material for cold middle roll关键词：冷轧中间辊,半高速钢16Cr5D, 组织, 机械性能2|0|0更新时间：2026-01-21
- 摘要：Based on operation process parameters of tundish for two strand concasting 1500 mmx 250 mm slab,using Eulerian multiphase model,porous media model and Larangian random-trajectory model,the characteristics of molten steel flow and inclusion moving trace in tundish with turbulence inhibitor and gas blowing curtain technology have been simulated mathematically,and the total removal ratio of inclusion in steel was calculated statistically by Monte-Carlo method. The simulation results showed that the technology of gas curtain was available to effectively improve the feature of molten steel flow and prolong residence time of molten steel, reduce the volume of dead zone; and as gas blowing rate was 0.90 m²/h the removal ratio of inclusion increased by 15.6% compared that with non-gas blowing关键词：中间包, 气幕挡墙, 精 炼, 数值模拟5|0|0更新时间：2026-01-21
- 摘要：Hie Al2O3dissolution rate of casting mold powder CaO-SiO2-Na2O-CaFi-Al2O3-MgO series has been measured by dissolution rate measuring apparatus. Hie inclusion absorption ability of mold powder for Al-killed steels could be predicted accurately by established regression analysis model for relation between Q dissolution rate and mold powder ingredient, and the mold powder for Al-killed steels has been optimized and designed by established nonlinear programming model. Hie results showed that with CaO/SiOz = 1.15, Na2CO320.0%, CaF220.0%, Al2032.0%, MgO 8.0%, the Al203-2 ·s-12|0|0更新时间：2026-01-21
- 摘要：The flow heat transfer and solidification process of 70L molten steel in a mold for 280 mm x 380 mm billet casting have been numerically simulated by a commercial software CFX4.4 to review the effect of immersed nozzle structure on comprehensive metallurgy effect. The results showed that with increasing immersed depth and obliquity of two side immersed nozzle, the thickness of cast billet shell continuously decreased from middle of wide surface to edge angle but the thickness was rather uniform, and the area of high temperature zone increased which location was moving down; and with increasing casting rate, the thickness of cast billet shell at wide and narrow surface decreased obviously2|0|0更新时间：2026-01-21
- 摘要：The steel 9Cr2-0.80~0.95C,0.40Si,0.40Mn,1.30~1.70Cr was laser quenched surface heat treatment by a 3 kW continuous CO₂ cross current laser with laser power 1.8~2.4 kW and laser beam scan velocity 500~1000 mm/min,and the surface structure and the case hardening depth were analyzed and tested. The test results showed that with higher laser power and lower beam scan velocity the case structure consisted of melting zone,phase transformation zone, heat influence zone and matrix and the case hardening depth was 0.4~0.8 mm;and with lower laser power and higher beam velocity the case structure consisted of phase transformation zone, heat influence zone and matrix and the case hardening depth was 0.2~0.6mm4|0|0更新时间：2026-01-21
- 摘要：The Industrial test of steel making of high speed steel M2(0.80～0.90C,3.8～4.4Cr,5.50～6.75W, 4.5~5.5Mo,1.75～2.20V)by direct reduction and alloying with scheelite,molybdenum oxide and V2O5ore has been carried out in a 20 t electric arc furnace at Chongging Special Steel.The results showed that the alloying rate was up to [w] +[Mo]+[V]=13%,the yield of W,Mo and V alloying element was 95.25%,98.01% and 90.72% respectively,the average tap-to-tap time was 283 min,the electric power consumption was 585 kWh/t and the quality of products met the requirement of standard2|0|0更新时间：2026-01-21
- 摘要：The causes of surface cracks formation of H beam of Nb-V microalloying steel BS55C-0. 14~0. 17C,0.45~0.55Si,1.25~1.45Mn,0.08～0. 10V,0.03～0.05Nb have been analyzed. The results showed that the steel was sensitive to longitudinal crack at solidification and its plasticity at 700~950 ℃ was lower,therefore,the cracks were easily produced at surface of H beam. Based on analysis of 168 heats production data of Nb-V microalloying steel BS55C,it was obtained that it was available to effectively decrease the surface cracks of H beam of Nb-V microalloying steel by using LF refining,controlling [s]≤0.015% and [P]≤0.020%,optimizing cast nozzle, adopting weak secondary water cooling and avoiding straightening at 700～900 ℃2|0|0更新时间：2026-01-21
- 摘要：The oxygen content in concasting billet has been controlled less than 20×10-⁶ in condition of non-vacuum treatment with 55 t LD-60 t LF melting flow sheet at Shijiazhuang Iron and Steel by the operation measures such as controlling LD blowing end-point carbon:low carbon steel 0.08%～0. 10%C;medium carbon steel 0. 10%～0. 15%C and high carbon steel ≥0.20% C,strengthening pre-deoxidation at steel tapping of LD,controlling slag tapping rate up to 98%, controlling Als 0.020%～0.035% during LF refining,to ensure refining(FeO)≤0.5%,feeding CaSi wire,50~80 L/ min soft blowing argon time ≥7 min,protective casting in whole process,using high efficiency holding and absorbing slag agent,and constant casting operation2|0|0更新时间：2026-01-21
- 摘要：Φ12~60 mm bar products of CCr15 bearing steel are produced by a 70 t high impedance UHP EAF-a 80 t ladle refining furnace-5 strand 150 mm×150 mm billet concaster flow sheet at Huaigang Co Lad. The statistical results of 36 heats bearing steel production data showed that with the process operation such as electric arc furnace charging 40%~ 50% hot metal to decrease residual elements and hydrogen content in steel, whole time argon stirring in refining,deoxidation by barium alloy,and shielding casting, the average oxygen content in billet of CCr15 bearing steel was less than 10×10-⁶,the porosity rating in steel products 0.5～1.5,the segregation rating 0.5~1.0,inclusion rating 0.5~2.0,and each quality index was to meet the requirement of GB/T18254-2002 standard2|0|0更新时间：2026-01-21
- 摘要：The low alloying high strength weather-resisting steel SPA-H strip-C≤0. 12,Mn 0.20~0.50,Si0.25~0.75,P0.07~0. 15,S≤0.04,Cu0.25~0.60,Cr0.30~1.25,Ni≤0.65 has been trial-produced by flow sheet of& an 100 t electric arc fumnace-ladle furnace-concaster-rolling mill at Nanjing Steel. The results of examination and service showed that the steel structure was ferrite+pearlite and has higher cleanliness,the yield strength of steel 345～435 MPa,tensile strength 480～570 MPa,elongation 23%~43%,and the steel has excellent weld ability关键词：高强度 耐候钢SPA-H 试制2|0|0更新时间：2026-01-21
- 摘要：Based on multi-component regression analysis on samples of 800 heats(300 t ladle),the model of predication for temperature of 60 t molten steel in tundish-Ttundhas been established:Ttund=-66.7499+1.03196 T- 0.76824x₁-0.00750x2+0.23253t-0.60624i-9.39124×10-6t³,where T-temperature of molten steel in la-dle arriving at tumntable/℃;x₁-laying aside time of ladle before casting /min;xz- baking time of tundish /min; t- casting time of molten steel in ladle /min.The results of statistic analysis on prediction temperature of molten steel in tundish showed that the error temperature of molten steel in tundish between predicted value and measured value was less than ±5℃.2|0|0更新时间：2026-01-21
- 摘要：The CCr15 bearing steel is produced by a 90 t EBT arc furnace-LF(VD)-240 mm×240 mm billet concasting process at Beiman Special Steel. The statistic results showed that with using 4.46 high basicity slag series,deoxidant containing 32.8% Al,VD vacuum treatment for 25 min and controlling [Als]≤0.030%,the oxygen content in GCr15 bearing steel was ≤8×10-62|0|0更新时间：2026-01-21
- 摘要：The technology measures such as optimiing parameters of tundish,adopting control flow device combined shock bowl possessed of roof flange with single dam,using a new typical ascillator with full plate spring resonance model, added a set of externnal electromagnetic stirer are implemented to increase the cleanliness of liquid steel, improve the surface quality of round cast billet, the equiaxial crystal ratio and the structure of billet. After technology revamping, the annual output of φ210～310 mm round billet at Tianjing Pipe increased up to 900000 t from 600000 t and the comprehensive qualified rate of casting billet increased up to 99.66%.2|0|0更新时间：2026-01-21
- 摘要：With basic material -85% first grade magnesia + 15% graphite, adding % Al/Mg(60/40)antioxidant, using solid and liquid phenolic resin as binder and making up according to reasonable grain grading, the magnesia-carbon taphole brick for two sets of 60 t ulra-high power electric arc furnace(UHP EAF)at Fushun Special Steel has been developed and was in service.The service life of taphole of developed brick increased to about 150 heats from original about 110 heats2|0|0更新时间：2026-01-21
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