最新刊期
卷 31 ， 期 4 ， 2010
- 摘要：Water modeling test for a 25 t four-strand tundish with bottom blowing gas has been carried out by using porous plug with different performance parameters and combined with RTD curves and standard deviation analysis to study the effect of porous plug area (210 ~ 105 mm x 56 ~28 mm), 4 gas blowing location and gas rate (60 ~ 120 L/h) on characteristics of fluid flow in tundish and compare with that without bottom blowing gas. Results show that with using bottom blowing gas, the flow characteristics of liquid steel in tundish are improved to balance the residence time of liquid steel at different outlet, prolong the peak concentration time and reduce the dead volume fraction. Gas blowing location near baffle, using smaller gas flow rate and smaller area of porous plug are available to improve the characteristics of fluid flow field of present tundish.关键词：中间包;吹气;透气砖;水模拟2|0|0更新时间：2026-01-21
- 摘要：The math model for erosion-corrosion of liquid steel-inclusion two-phase flow in tundish on refractory has been established and the numerical calculation to erosion-corrosion characteristics of refractory in tundish with turbulence inhibitor, dams and weirs is carried out. Calculated results show that the position with max erosion-corrosion rate in tundish is at turbulence inhibitor, next is the tundish wall near slag line in pouring-in area and the side wall of dams and weirs facing to liquid steel flow, the erosion-corrosion of refractory in another region is very small and can be ignored.关键词：连铸中间包, 耐火材料, 冲蚀, 数值模拟2|0|0更新时间：2026-01-21
- 摘要：Main analysis of stainless-steel dust with intermediate size 1. 78μm is (% ：) 41.0Fe, 3.3Ni, 24.80, 2. 6Cr, 4.1Ca, 3. 6Zn, of which the main mineralogy is Fe3O4FeO • Cr2O3and CrO. The effect of gas-solid ratio (1.6- 4. 0 L/g), reduction time (50 ~300 s), CO fraction in H2-CO mix gas (20% ~60%) and temperature (500 〜700 ℃) on reduction rate of stainless-steel oxides has been studied. Orthogonal test results show that the gas-solid ratio has most obvious effect in four factors, following in sequence being reduction mix gas ingredient, reduction time and reaction temperature. The reduction rate of stainless-steel dust is up to 50% in 5 min with gas-solid ration 4. 0 L/g, CO fraction 15% - 25% at 600 - 700℃.4|0|0更新时间：2026-01-21
- 摘要：Numerical simulation of mold filling and solidification process of liquid for Q215 steel 750 mm x450 mm x 120 mm shaped slab concasting mold with single submerged nozzle and double submerged nozzles has been carried out by u- sing CFD commercial software Flow-3 d to get the distribution diagrams of velocity field and temperature field and the location and shape diagrams of free-surface during mold filling process. The effect of single and double submerged nozzle model on velocity field and solidification is analyzed. Results show that double submerged nozzle model is available to lighten the intensity of circumfluence at upper part of mold, decrease impact depth, increase heat transfer efficiency and quicken solidification speed of liquid steel in mold, that is favorable to improve quality of slab and increase casting speed.2|0|0更新时间：2026-01-21
- 摘要：Developed status of steels for nuclear reactor pressure vessel at home and abroad is presented including re- querulent for analysis and properties, metallurgical process, heat treatment, and present situation of manufacture and application. The developed trend of steels for nuclear power station is discussed, as the structure material technique is key technique for manufacturing nuclear reactor pile development of reactor to large-scale and integration, the steel SA508Gr4N which has higher strength-toughness and hardenability shall replace the current steel SA508Gr3 step by step.2|0|0更新时间：2026-01-21
- 摘要：With summarizing the technology materials about 100 t EAF wall oxygen lance of PRAXAIR, BSE and MORE, the characteristics of the equipment are analyzed to compare the main technical parameters including main production and quality indexes, main power and material consumption indexes. The optimum oxygen supply in whole process of electric arc furnace steelmaking is accomplished by development and application of wall oxygen technology obviously to de- crease the manual operation intensity and increase productivity.2|0|0更新时间：2026-01-21
- 摘要：Drill Pipe is main component part of oil drill-stem, its service environment is extremely severe and stress conditions are very complicated. The development trend of overseas drill pipe products is presented from both development of drill pipe grades and connector including ultra-high strength drill pipe, sour service drill pipe, titanium alloy drill pipe, intelligent drill pipe, ultra-high torque tool joint and fast make-up ultra-high torque tool joint.6|0|0更新时间：2026-01-21
- 摘要：The effect of quenching temperature1025~1125℃+570℃4 h air cooling + 720 ℃ 2 h air cooling and secondary tempering temperature 680~780 ℃ after1050~1075 ℃ quenching on mechanical properties of martensite heat resistant steel X12CrMoWVNbN10- 1- 1(%:0. 11C,10.28Cr,0.77Ni,1.0Mo,0.96W,0. 18V,0.04Nb,0.053N) has been studied. Results show that with increasing quenching temperature,the strength of steel increases,of which the plasticity has no appreciable change,but the impact toughness obviously decreases; with increasing tempering temperature, the strength of steel decreases,while the plasticity and impact toughness of steel increase. The optimizing heat treatment of the steel is1050~1075℃1~2h oil cooling +570℃4h air cooling +715~725 ℃ 2 h air cooling.2|0|0更新时间：2026-01-21
- 摘要：Hot plasticity of U71Mn steel(%:0.75C,1.20Mn) and U75V steel (%:0.75C,0.94Mn,0.05V, 0.005Al) at 700~1300℃ has been studied by using Gleeble- 1500D thermo-simulation machine. Results show that as vanadium carbo-nitride precipitates at grain boundary and inside, the hot plasticity, especially the plasticity at Ⅲ brittle zone (850℃), of microalloying heavy rail steel decreases by adding vanadium. The strengthening temperature of cast bloom should be ≥900 ℃ to prevent bloom crack forming.关键词：微合金化重轨钢;钒, 高温塑性2|0|0更新时间：2026-01-21
- 摘要：Based on insuring both mould slag with similar viscosity and melting temperature by using B2O3as a substitute solvent to replace CaF2in fluorine-containing mould flux, the temperature and capacity of crystallization of fluorine-containing mould flux (%): 31. 1 ~ 35. 5CaO, 33. 9 〜38. 5SiO212A12O33MgO, 5Na2O, 6 ~ 15CaF2and free-fluoride mould flux (%) ： 33. 5 ~ 35. 5CaO, 36. 5 ~ 39. 5SiO24Al2O35MgO, 8 〜15Na2O, 2Li2O, 2 ~ 6B2O3and influence on controlling heat transfer of mould have been studied. Results show that the viscosity and melting temperature of 5Na2O- 6B2O3free-fluoride flux are similar to that of 5Na2O-15CaF2fluorine-containing flux and the functions of controlling heat transfer of mould are similar.关键词：中碳钢连铸, 结晶器, 保护渣, CaF2 , B2O3, 物理性能3|0|0更新时间：2026-01-21
- 摘要：A 100 t RH unit with less than 67 Pa and vacuum degassing capacity up to more than 500 kg/h is de-signed and manufactured at home. Production practice show that the more recirculation rate of liquid steel with increasing argon flow rate and the longer degassing time at high vacuum, the more obvious degassing effect; the hydrogen, oxygen and carbon content; line steels could respectively decrease to less than1×10-620×10-6and 20×10-64|0|0更新时间：2026-01-21
- 摘要：The cracks at surface of 150 mm round bar occur after rolled from 260 mm×300 mm continuous casting bloom of steel Q235D (0. 10%～0. 17%C) melted by 50 t UHP EAF (hot metal charging ratio more than 50%) + LF (VD)process at Special Steel Workesley Steel. Analysis indicated that the larger the △C-difference between carbon equivalent [C,] at peritectic point of steel and real carbon content in steel [C], the higher the crack rejection rate of hypo- peritectic steel Q235D products. Practice shows that with controlling.0. 15%～0. 17%[C] for △C<0.015%, overheating extent of liquid steel 20~30℃, combined with decreasing mold cooling water rate, decreasing cooling water intensity in secondary zone and with low casting speed, the qualified rate for surface quality of finished products is more than 99.3%.关键词： 亚包晶钢Q235D, 包晶点碳含量, 大方坯表面质量3|0|0更新时间：2026-01-21
- 摘要：The production flow sheet for (6～× (1600 ×3200) mm plate of developed low carbon bainitic steel Q650(%:0.06~0.08C,1.6~1.8Mn, ≤0.3Cr, ≤0.06Nb, ≤0.02Ti, ≤, ≤0. 15Mo, ≤0.05V, ≤0.002B) is hot metal pretreatment - 120 t converter - LF refining -slab casting - control rolling and cooling process.With controlling single pass deformation≥15% in recrystallization zone and accumulated deformation≥50%, and passes accumulated deformation≥60% in un recrystallization zone, controlling cooling speed 15 ℃/s and end cooling 500 ℃, the steel has different type of bainite transformation structure and excellent comprehensive porperties.关键词：Low Carbon Bainite Steel;Development and Production;Control Rolling and Control Cooling;Structure. 2|0|0更新时间：2026-01-21
- 摘要：The X70 pipeline steel (% ： 0. 02 - 0. 05C, 0. 145 〜0. 25Si, ≤0. 015P, Wt). 002S, 1. 70 ~ 1. 80Mn, 0. 085 ~ 0. 15Nb, 0. 2 - 0. 3Ni, 0. 015 ~ 0. 040Al, 0. 01 ~ 0. 03Ti) is produced by hot metal pretreatment - 120 t converter - RH - LF - (200 ~ 250) mm x (900 ~ 1 800) mm slab concasting process. With metal manganese to replace low- carbon ferro-manganese and partial silico-manganese to decrease carbon pickup amount in liquid after RH treatment, controlling LF liquid carbon pickup amount ≤0. 01 %, controlling pretreated hot metal [ S] ≤0. 002% and basicity of LF refining slag being about 1.5, the LF initial [ C] and [ S] are respectively 0. 03% and 0. 001 5%, and the LF end [ C] and [S] are respectively 0. 04% and 0. 000 8%, to meet the requirement of service.2|0|0更新时间：2026-01-21
- 摘要：The dynamic recrystallization behavior of Cu-P-Cr-Ni-Mo weathering steel (% ： 0. 10C, 0. 075P, 0. 65Cr, 0. 22Ni, 0.43Mo, 0. 28Cu) with strain rate 0. 01 ~ 1 s ~1 at 850 — 1 150 T： has been studied by Gleeble-3500 thermal simulation test machine to get true train-true stress curves in austenite area and dynamic recrystallization diagram of the steel, the effect of deformation parameters on peak stress and the relation between true strain and volume fraction of dynamic recrystallization of the weathering steel with various hot deformation are analyzed, and the thermal deformation formula of austenite of the steel, the regression formula of dynamic recrystallization at critical conditions and the math model of dynamic recrystallization volume fraction of austenite are established. Results show that with raising deformation temperature the peak stress decreases and with increasing strain rate the peak stress increases ； with increasing Z parameter i. e. decreasing deformation temperature and increasing strain rate the critical strain of occurred recrystallization and the strain εs of occurred complete recrystallization increase linearly.2|0|0更新时间：2026-01-21
- 摘要：High temperature mechanical properties of grain-oriented silicon steel(0.027%C,3.06%Si) melting by a 30 kg vacuum induction furnace in lab and simulating 50mm thin slab casting and rolling process have been tested by Gleeble- 1500D stress/strain thermal simulation machine.Results show that with strain rate 1×10-3s-1there are two brittle temperature zones for the test steel,i.e. I brittle zone- melting point to 1300 ℃ and Ⅲ brittle zone- 800～600 ℃. 1390~1410 ℃ is crack sensitive range of the test steel. In I brittle zone the dentritic crystal boundary surrounded by liquid film of rich solute is main reason to produce brittlement.And in Ⅲ brittle zone,γ→α transformation,y,α and Fe3C triple phase coexistence at about 760 ℃ and precipitates at grain boundary are main cause of deterioration in ductility.2|0|0更新时间：2026-01-21
- 摘要：The effect of temper rolling (0~3.3%) and natural aging on mechanical properties and bake-hardening performance of 0.7 mm ultra-low carbon bake-hardening steels plate (%:0.0030C,0.008Nb-0.003Ti,0.0030N and 0.0030C,0.012Nb-0.012Ti,0.0042N) annealed at 830 ℃ has been studied. Results show that at beginning with in- creasing temper elongation, due to decrease of Cottrell atmosphere and increase of dislocation density, the yield strength of steels decreases, as the temper elongation of 0.008Nb-0.003Ti steel and 0.012Nb-0.012Ti steel increases respectively up to 0.48% and 0.26%,the yield strength of steels decreases to minimum; then with further increasing temper elongation, due to enhancement of cold work hardening, the yield strength of steel increases. The temper elongation too low and too high lead up to decrease of hake hardening performance. To control temper elongation 0.5%~1.5% is available to get lower yield strength, higher tensile fracture elongation and excellent bake hardening performance of steel. With naturalizing for 3 months, the bake hardening performance and the elongation of steel plate degrade.关键词：平整,&烘烤硬化, 屈服强度, 延伸率, 自然时效2|0|0更新时间：2026-01-21
- 摘要：Structure and mechanical properties of steel 20SiMn3NiA normalized at 860 ℃, oil quenched at 900 ℃ for 40 min and tempered at 180~650℃ for 90~150 min have been studied. Results show that the better tempering temperature of steel is 200~250℃,the lath martensite, fine slim rod precipitated carbide and residual austenite are obtained in the steel tempered at 230 ℃ and with steel tempered at 250 ℃ the tensile strength(Rm)is more than 1500 MPa and the impact energy(Axv)is higher than 80J with excellent combination of strength and toughness as the steel 20SiMn3NiA is tempered at 320 ℃,the precipitated carbide is continuous lamellar distribution in steel led to lower impact energy of steel and thMeastea0Iie3NiSeelm2p0et3～,T6e0m0pr,rsutbuvrieo,uMsetapneirclriPttesrst.ies关键词：20SiMn3NiA钢, 回火;组织, 力学性能2|0|0更新时间：2026-01-21
- 摘要：The studied steel 0Cr15Ni5WMoVNb(%:0.068C,14.54Cr,5.32Ni,0.88W,0.92Mo,0.20V, 0. 10Nb)is melted by 5 t medium frequency induction furnace+2 t vacuum electro-slag remelting furnace,then forged and hot rolled to φ45 mm bar products,and the test specimens solid-solution-treated at 1000 ℃ for 30 min +cold-treated at -70℃ for 2 h are aged at 400~600 ℃ for4 h. Test results show that with aging at 450 ℃,the strength of steel 0Cr15Ni5WMoVNb is up to maximum value with main quasi-cleavage fracture and low impact energy-40J,with increasing aging temperature the impact energy of steel increases obviously and strength decreases,and with aging at 510 ℃ the steel has excellent strength-toughness i.e.tensile strengh Rm 1300 MPa,yield strength Ro.21100 MPa and impact energy Akv 100 J.2|0|0更新时间：2026-01-21
- 摘要：Hot tension test with strain rate 5×10-3s-1and hot reduction test with deformation 60% and strain rate 1×100s-1for 0～0.034% Ce super duplex stainless steel 00Cr25Ni7Mo4N (%:0.016～0.020C,24.50～24.72Cr, 7.06~7. 18Ni,3.61~3.73Mo,0.26~0.27N) at 950~1200℃ have been carried out by using Gleeble- 1500D thermal simulation machine. Results show that adding suitable cerium is available to increase the hot plasticity of steel 00Cr25Ni7Mo4N, and the steel containing 0.012Ce% has optimum hot plasticity; as the Ce content is more than 0.021%, the peak stress of the steel is lower than that of steel non-adding rare earth elements; and adding Ce is available to reach steady state deformation stage in advance.关键词：超级双相不锈钢;00Cr25Ni7Mo4N, 铈, 热加工性2|0|0更新时间：2026-01-21
- 摘要：The 15NiCuMoNb5-64 steel (%:0. 14C,1. 14Ni,0.62Cu,0.32Mo,0.020Nb) is melted by 100 t EAF+LF+VD-Ingot casting process, forged to Φ φ350 mm tube blank and hot-rolled to Φ 323.9 mm×14.2 mm steel tube by Φ460 mm PQF steel mill. The metallurgical quality, mechanical properties, brittle transformation temperature and stress- fracture strength of the steel tube at high temperature endure and so on all meet the requirement of standard.关键词：15NiCuMoNb5-6-4钢,&核电站用钢管,&产品开发, 性能6|0|0更新时间：2026-01-21
- 摘要：The structure evolution of grain-oriented Si steel (%:0.04C,3. 16Si,0.50Cu) with main inhibitor Cu2S and low temperature slab reheating in 650~1050 ℃ high temperature annealing process has been studied by orientation distribution function and metallographic observation. Results show that the primary and secondary recrystallization temperature of the grain-oriented Si steel are 650～700 ℃ and 1000~1050 ℃ respectively; the intensity of main texture in primary recrystallized steel decreases in order of{111}<110>,{112I<110>and{111}<112>,and the grain size and intensity of texture in primary recrystallized structure change slightly at 700~900℃,while at 900~1000 ℃ the velocity of grain growth accelerates and the{111}<110> and{112}<110> texture components intensify, but the intensity of {111}<112> texture component is almost un-changed.关键词：低温板坯加热,&晶粒取向, Si钢;退火, 组织5|0|0更新时间：2026-01-21
- 摘要：Effect of 0.09%~0. 14% C content on structure and mechanical properties of 2Mn-0.003B-0.05Ti micro- alloying steel cold drawn with 5%~50% reduction and aged at 100~500 ℃ for 2 h has been studied. Results show that with lower carbon content (0.09%~0. 12%C), the finer and uniform distributed granular bainite structure in steel is obtained, while with 0. 14% C, the lumpy ferrite shall occur in structure; at same cold-drawing reduction, with increasing carbon content the strength of steel increases and plasticity decreases, and the larger the reduction, the more significant the tendency; and with increasing carbon content the increment of strength of steel aged obviously decreases.关键词： Mn-B-Ti冷作强化非调质钢;碳含量, 粒状贝氏体;力学性能5|0|0更新时间：2026-01-21
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