最新刊期
卷 28 ， 期 1 ， 2007
- 摘要：Water modeling experiments and numerical simulation for flow control device of24 t tundish at Chongqing Steel have been carried out to study influence of turbulence inhibitors with different size on fluid flow behavior by measuring residence time distribution (RTD ) curves and removal rate of inclusion s. The results showed that it was available to increase response time of nozzle and average residence time, raise plug flow volume by 30% , decrease dead zone volume by 50% and imp rove fluid flow behavior in tundish by using suitable turbulence inhibitor and existing dam combination.关键词：中间包;湍流控制器;水模型;数值模拟2|0|0更新时间：2026-01-21
- 摘要：According to measured solubility data of Thermo-Calc and concerned references, the equilibrium solid solubility formulae of Fe4N in austenite and in ferrite have been derived respectively as log[N]γ= 0.940 -479.4/T and log[N]α= 1.074 - 1 838/T. With considering free energy of Fe4N formation, the equilibrium solid solubility formulae of nitrogen (gas) in austenite and in ferrite have been derived respectively as log[N]γ= -2.752 + 1 321/T and log[N]α= -1.560-1 214/T.2|0|0更新时间：2026-01-21
- 摘要：A multi-field coupled analysis on temperature, structure and stress field of 0.21C- 1.03Cr-0.20Mo-0.03Nb gear steel cylinder in quenching process has been carried out by using FEM software MSC. Marc, combined with thermal elastic and plastic models and compiled sub programme. The results showed that the internal stress produced in quenching process promoted martensite transformation, in martensite phase transformation conditions the structure stress surpassed thermal stress led to residual stress in quenched piece presented structure stress distribution. Comparison between calculated value and measured value indicated that the calculated results of quenching stress simulation will be more precise with considering interactions between transformation and stress.关键词：齿轮钢;马氏体转变,残余应力, 多场耦合分析2|0|0更新时间：2026-01-21
- 摘要：The thermal deformation behavior of BH08G welded steel- 0.08C, 1.59Mn, 0. 34Mo, 0.1215 with strain rate ε 0.1~10.0 s-1at 950 ~ 1 050℃ has been studied by Gleeble-1500 thermal simulation machine. It is obtained by regression calculation of austenite recrystallization dynamics that relation between Zener-Hollomon parameter Z and peak stress δmis Z = 3. 829 x 1012exp (0.046 46δm) , and relation of lnZ with peak stress δmdynamic recrystallization critical strain εmpeak strain εmand dynamic recrystallization finishing strain εsis respectively δm= 21. 338 InZ - 516.49, εc ≈0. 83εm= 0.032 6 InZ - 0.732, and εs= 0.052 2 InZ -0.980 1. The dynamic recrystallization state diagram of BH08G steel shows that with rough rolling at 980 ~ 105 0℃ and finishing rolling at 930 ~ 980℃ it is available to fine deformed grain and improve mechanical properties of material.2|0|0更新时间：2026-01-21
- 摘要：The macrosegregation law of C,S,P and Al in 240 mm×240 mm cast billet of steel 40Cr(0.38 ~ 0.40C,0.90~0.91Cr,0.015～0.029P,0.009~0.014S)has been studied by the technology of original position statistic distribution analysis(OPA).The study indicated that with 45%～63% equiaxial crystal rate in billet, there has not any effect of overheating temperature(5~32 ℃)of molten steel in tundish on macrosegregation of C, but there has an obvious effect on macrosegregation of S and P. The S presents center positive segregation, P presents center negative segregation, and low overheating temperature(5℃)could not decreases S and P segregation.Al2O3inclusions concentrated at center of cast billet leads to Al element center positive segregation.关键词：连铸坯,凝固偏析;原位统计分布分析4|0|0更新时间：2026-01-21
- 摘要：The numerical simulation of fluid field of 70L steel(0.70C)in 280×380×800(mm)mold and molten steel flowage at inner of two-side bole immersed nozzle structure with casting speed 0.8 m/min have been caried out by commercial software CFX4.4.The results showed that as side hole inclination was 10°and 20°,there was second eddy near the liquid surface in mold easy to induce entrapped slag, while inclination was 30° the liquid surface relatively calm; and as submerged depth of immersed nozzle was 175~225 mm the impact of nozzle jet flow on liquid surface of steel in mold was not obvious.关键词：方坯结晶器;两孔浸人式水口; 钢水流动;数值模拟2|0|0更新时间：2026-01-21
- 摘要：Test low carbon bainitic steel (0.042～0.045C,1.43～1.47Mn,1.0～2.5Cu,0.29 ～0.30Mo, 0.025~0.029Nb,0.011~0.018Ti,0.0013~0.0023B) was melted by a 50kg vacuum induction furnace. Teat results showed that with increasing Cu content from 1.0% to2.5%,the precipitation speed of e-Cu in steel and the peak hardness increased; and with increasing Cu%, the yield strength of direct-quenching(DQ)steel after rolling increased from 865 MPa to918 MPa and the yield strength of DQ + 500 ℃ tempering steel increased from 935 MPa to1140 MPa, while the tensile strength and impact toughness of DQ+500 ℃ tempering1.0~2.5Cu steel were lower than that of DQ steel.关键词：超高强度, 低碳贝氏体; ε-Cu沉淀;力学性能2|0|0更新时间：2026-01-21
- 摘要：The structure evolution of pearlite and overcooling austenite of 0.75C eutectoid carbon steel during com- pression has been studied by Gleeble 2000 and 1500 thermal simulation machines.The test results showed that as sample heated with 10 ℃/s to700 ℃ for 3 min than carried out 60% reduction,the lamellar pearlite in steel broke up and frac- tured; and as sample heated to 1150 ℃ for 1 min for austenization than cooled with 20 ℃/8 to 700 ℃ and reduced by 60%,the partial overcooling austenite in steel transformed to fine lamellar pearlite under effect of deformation.关键词：共析钢, 奥氏体, 珠光体, 变形2|0|0更新时间：2026-01-21
- 摘要：The characteristics of structure and grain, yield strength -ultimate tensile strength(YS-UTS)xatio,and c longation of 2.0～12.7 mm steel Q345B strip produced by CSP process(71 mm cast slab)and conventional process(250 mm cast slab)have been analyzed by quantimet and statistic of product mechanical properties.The results indicated that the grain size of strip produced by CSP process was7.03~8.78 μm,grain size rating 11.5～12.0,average YS-UTS ratio 0.77 and elongation 27.8% which were higher than that by conventional process(respectively8.79～8.95 μm,10.0~ 10.5,0.72 and 25.0%).Calculated results show that the contributions of fine grain strengthening and precipitation strengthening of low carbon steel strip produced by CSP process make up 59% of all strengthening factors,while that by conventional process make up 55% of all factors.关键词：CSP Process;Q345B Steel Strip;Structure;Mechanical Properties2|0|0更新时间：2026-01-21
- 摘要：The annealing test of 0.8 mm sheet cold rolled from 0.04C steel 3 mm bot rolled strip produced by CSP process has been carried out by 4- high rolling mill and tube funace with protective atmosphere in laboratory,and the tex- ture of annealed samples was analyzed by using etching pit method,while the annealed samples of 1.2 mm strip cold rolled from 3 mm bot rolled strip produced by CSP process at sheet plant,Baotou Steel were examined by X- ray method. The re- sults showed that there was weak {111}texture component in annealing texture of surface layer of 1.2 mm SPCC cold roll- ing sheet and{111} texture which is available to increase deep-drawing property of steel was not found at center layer. The {111}/{100|orientation density ratio of1.2 mm sheet annealed samples was2.0~3.0 which was equal to that by etching pit method in laboratory.关键词：CSP工艺;冷轧板;退火织构2|0|0更新时间：2026-01-21
- 摘要：The effect of rolling parameters such as 35.0%~52.0% reduction rate in recrystallization region,60.2% ~70.3% reduction rate in non-recrystallization region, cooling rate(20～38 ℃/s)on structure and mechanical properties of0.06C-0.31Mo V-Nb-Ti-B microalloying steel has been studied by Cleeble thermal simulation machine.The test results sbowed that with increasing cooling rate,the upper bainite volume percentage increased led to increasing strength of steel, and the more acicular ferrite content in bainite matrix the more upper shelf energy(USE)of steel and the lower ductile brit- tle transition temperature, therefore the acicular ferite in bainite matrix could improve the mechanical propertics of pipeline steel.2|0|0更新时间：2026-01-21
- 摘要：The deoxidization behavior of magnesium alloy (8% ~ 15% Mg) deoxidizer- AlMg, SiCaBaMg, SiCaBaAlMg to 0. 05% 〜0. 07% C steel has been studied by a 30 kg induction furnace with MgO crucible. Test results showed that with deoxidation using AlMg alloy contained 8% 〜10% Mg the oxygen content in steel decreased to 33.77 x 10-6with deoxidation using SiCaBaAlMg alloy contained 15% Mg the oxygen content in steel decreased to 38.62 x 10-6while magnesium alloy had strong desulphurization efiEect during deoxidized period, with initial sulphur content 0.063% in steel the desulphurization rate by AlMg alloy was 46.03% and that by SiCaBaAlMg core wire was 49.21%.2|0|0更新时间：2026-01-21
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Effect of Cold Treatment Temperature on Structure and Mechanical Properties of Steel 1Cr20Co6Ni2WMoV
摘要：Martensite heat resistant steel 1Cr20Co6Ni2WMoV was melted by a vacuum induction fumace with 22.5 kg ingot and forged to 中16 mm bar.Heat treatment process of samples were quenching at 1060 ℃ for 1h oil cooling + cold treatment at -70℃ or- 192 ℃ for 2 h air cooling + tempering at 640 ℃ for 3 h air cooling. Test results showed that with both heat treatment process the structure of steel 1Cr20Co6Ni2WMoV consisted of high density dislocation tempering lath martensite,residual austenite,δ- ferite and M23C6.With cold treatment temperature decreased from -70 ℃ to - 192 ℃ the amount of M23C6precipitated at grain boundary and the dislocation density in grain inside increased,the a- mount of residual austenite decreased and the tensile and yield strength of steel respectively increased from 1045 MPa and 715 MPa to 1090 Mpa and 760 MPa.2|0|0更新时间：2026-01-21 - 摘要：The effect of 0.45% 〜1.44% Cu on low temperature tensile strain-induced martensite transformation in 304 stainless steel-0. 068 ~ 0. 072C, 18. 72 ~ 19.06Cr, 9. 40 ~9.46Ni at - 196℃ has been studied by X-ray difi&action analysis. Test results showed that the Cu had obvious depression action to strain-induced e martensite transformation in 304 stainless steel at - 196 ℃ , and with increasing Cu content in sted to 1.44% the e martensite transformation was not detected in low temperature deformed sted. And with increasing Cu content in steel the trend of strain-induced α'martensite transformation at- 196 ℃ decreased, led to flow stress lower than that in low Cu content steel after strain accumulated to definite value.2|0|0更新时间：2026-01-21
- 摘要：In 1985~2005, the patents of non-oriented electrical steel applied in China consist of 44 patents applied by abroad producers (main producers were JFE and Shin Nippon Seitetsu) and 48 patents applied by native producers (main producers were Baosteel and Wuhan Steel). The fields of patented technology of electrical steel applied by abroad producers mainly include high efficiency and painting technology, and that applied by native producers mainly include rolling process and painting technology. The typical patented technology of non-oriented electrical steel including high efficiency, thin strip casting, painting, shaping process and semi-process products is presented. The developed trend of non-oriented electrical steel is high efficiency production and special service products.关键词：关键词 无取向,电工钢, 专利2|0|0更新时间：2026-01-21
- 摘要：The economic-technical indexes and application of a 30 t AOD unit at Pugang,40 t AOD units at Taiyuan Steel and a 120 t AOD unit at Shanghai Nol Steel in China are summarized. The development of AOD refining technology such as decarburization, desulphurization, replacing Ar with N2and top lance technology is presented and the technical issues including to perfect gas supply model for AOD refining and service life of furnace lining are discussed in this article.关键词：不锈钢AOD精炼;应用;发展6|0|0更新时间：2026-01-21
- 摘要：0. 14C-0.35N austenite stainless steel 1Mn15Cr17Ni2N melted by 25t EAF-VOD+LF-680 kg ingot process. [N] was 0.040% and [O] was 0.0158% at end of VOD refining, and the analysis results indicated [N] 0. 139% and [0]0.0033% after nitrogen blown for 45 min in LF with blown nitrogen amount 50 m³ with blown nitrogen average yield 33.07%. Then added 500 kg chromium nitride (8.60%N) and 150 kg manganese nitride(5. 13%N), with sampled analysis the [N] was 0.35% and the [O] was 0.0029%,the comprehensive yield for added chromium nitride and manganese nitride was 87.41%.关键词：高氮;&奥氏体不锈钢;VOD LF2|0|0更新时间：2026-01-21
- 摘要：Traditional process to produce electrode of alloy steel 30CrMnSiA1.2 t ESR ingot at Daye Special Steel is EAF+LF-rolling250 mm×250 mm Billet,by which the crack easily produced at top of ESR ingot.With using optimum process to produced ESR electrode:EAF+LF(VD)steelmaking-φ320 mm cast round electrode,controlling≤0.003Pb, ≤0.015Sn,≤0.030As,≤0.015(Pb+Sn)and0.020～0.035Ti in electrode,power supplying and water temperature controlling by computer, the ESR filling ratio increased from 0.40 to0.53,ESR electrical power consumption decreased by 200 kWh/t,metal yield of ESR ingot/electrode increased from 82.41% to93.75%,rejected metal decreased from 109.55 kg/t to29.42 kg/t and production period shortened by 7～10 day8.关键词：电渣钢锭; 表面质量;工艺优化3|0|0更新时间：2026-01-21
- 摘要：The1.6～12.7 mm strip of L360 pipeline steel(0.08～0. 12C,0.10～0.25Si,1.10～1.30Mn,≤ 0.015P,≤0.008S,0.03～0.05Nb)was produced by hot metal desulphurization - 120 t converter melting - LF refining (argon stirring,feeding wire)- 160(220)mm slab concasting -2-stand Steckel mill flow sheet.The production data sta- tistic results showed that with using the measures such as catch carbon and reblow practice to control converter end [C] 0.04%,AlMnFe,MnFe and NbFe alloying and feeding Al wire and SiCaBa wire in LF refining,argon shielded casting in whole slab casting,the[O]of L360 pipeline steel was(10~15)×10-6[N](14~35)×10-6[H](1.2～1.6)× 10-6and Σ [N+H+0]≤51.6×10-6yield strength(YS)of the steel was 425～460 MPa,ultimate tensile strength (UTS)505~525 MPa,and ratio of YS-UTS 0.81～0.88,all up to standard.关键词：转炉-LF-CC流程; L360管线钢;铌微合金化2|0|0更新时间：2026-01-21
- 摘要：With controlling sulphur content in steel≤0.020%,temperature fluctuation range of molten steel of df- ferent heat in tundish decreasing to 10 ℃ from original 25 ℃,adjusting mold water rate to 190～200 m3/h,controling casting rate0.55~0.75 m/min,the intemal crack reject rate for 260 mm×300 mm cast billet of steel 20CrMnTiH, 40Cr, CCr15 etc decreased to 0.01% from original 0.30%,in order to basically eliminate the intemal crack in cast billet.关键词：260 mm×300 mm连铸坯,&内裂纹, 铸速, 中间包钢水温度5|0|0更新时间：2026-01-21
- 摘要：With optimized process such as dry masonry brickwork joint ≤0.5 mm,MgO content in magnesium-carbon brick ≥75%,MgO content in refining slag≤20%,VD treating time decreasing from 45 min to 30 min and refining time with low viscosity slag decreasing from 45 min to 15min,the service life of slag line brick in an 100 t LF(VD)umit by using double slag line operation method for production of 0.70~0.75C steel cord of tyre increased from 15 heats to 27 heats.关键词：Ladle Furnace,&Slag Line Brick,&Etching, Technology Measure2|0|0更新时间：2026-01-21
- 摘要：The surface quality of0.72～0.82C φ5.5 mm wire for steel cord af tyre produced by different producers at home and abroad was tested and examined. The results showed that surface of wire produced at moet producers has no de- carburized layer and average thickness of oxidizing scale layer was ≤7.7 μm with thickness difference ≤1.13 μm,in which the Fe3O4content was equal to FeO content to be available to remove scale of surface,and only there wa decarburi- zed layer with depth 0.05～0.10 mm for wire produced at very few of producers,and average oxidizing scale layer was 12.47 μm with thickness difference ≤1.84 μm.2|0|0更新时间：2026-01-21
- 摘要：The composition of macro inclusion in 20MnTiB steel and 45 steel melting by 70 t EAF-LF-CC flow sheet at Egang and ingredient of mold powder and refractory material for concasting process have been analyzed,and it is obtained that the macro inclusion of steel is a composite inclusion which mainly consists of Al2O3MgO,CaO,Na2O and SiO2. With improving technology measures including white refining time ≥10 min,controllingAls./Alt≥85%,after feoding Ca- Si wire soft argon stirring time ≥7 min,controlling immersion depth of ladle nozzle ≥200 mm and immersion depth of im- mersion nozzle 80～130 mm,and using quality refractory materials,the qualified steel rate for macro inclusion examination increased to 99.77%～100% from original 90.96%~95.31%.关键词：EAF-LF-CC; 低倍组织, 夹杂物;工艺控制2|0|0更新时间：2026-01-21
- 摘要：Based on simulation of molten steel flow field in mold for 150 mm×150 mm billet and analysis on slag inclusion mechanism, the relative process parameters for concasting have been improved including increasing immersion depth of submerged nozzle to 120～135 mm from original 70～80 mm, enlarging lower vent diameter of submerged noazle to 32 mm from 25 mm, increasing viscosity of mold flux to0.40 Pa · s from 0.38 Pa · s, and mold molten steel level fluctuation decreased to ±3.0 mm from ±5.0 mm,as a result the qualified rate for inclusion rating in steel C72DA increased from 92. 10% to 99.51%.2|0|0更新时间：2026-01-21
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