最新刊期
卷 29 ， 期 3 ， 2008
- 摘要：The optimum design of tundish structure for No2 concaster at Stainless Steel Plant, Tang Steel has been carried out by water modeling test. The tundish dam, weir and turbulence inhibiting on flow field in tundish with 180～200 mm slab casting speed 1.02～1.55 m/min was studied to obtain optimum structure and geometric parameters for tundish. After optimum, with flow rate 4.5 m3/h, the minimum residence time increased to 106 s from original 52 s, average residence time increased to 572 s from original 405 s, and dead zone volume decreased from 6.21% to 3.51%.关键词：连铸;中间包;水力学模型;停留时间5|0|0更新时间：2026-01-21
- 摘要：Based on the structure and operation parameters of an 30 t tundish for 6-strand 200 mm×200 mm billet concasting,the effect of gas curtain technology on liquid steel flow characteristics and removal rate of inclusion in tundish with 6-strand has been studied by mathematical simulation using Eulerian multiphase model,porous media model, Eulerian Lagrangian Model and Monte-Carlo method with introduce bubble absorption model. Results indicate that with adopting optimum gas curtain technology,it is available to improve liquid steel flow condition,balance residence time at each exit, prolong average residence time of liquid steel, decrease dead zone volume and increase remove rate of inclusion,and meet requirement of steelmaking for ultra-purity steel in tundish for multi-strand concasting.关键词：Tundish;Gas Curtain;Inclusion;Ultra-Purity;Mathematical Simulation4|0|0更新时间：2026-01-21
- 摘要：The thermodynamics on dephosphorization and rephosphorization of an ultra-low oxygen spring steel (0. 60C, 1. 8Si, 0. 8Mn, 5 x 10-6O) during refining process with 80 t LD-LF-VD-CC flow sheet has been analyzed and studied. Results show that as spring steel refined by basicity ≥ 4, FeO + MnO ≤ l% high basicity low oxidation slag, the rephosphorization couldn't be avoided but the reductive dephosphorization was likely to occur. With LD tapping by stopping slag, avoiding strongly stirring during refining, and using high basicity low oxidation slag, it is available to decrease liquid steel rephosphorization during refining and control 0.010% [P].关键词：超低氧弹簧钢;LF精炼;脱磷;回磷;热力学2|0|0更新时间：2026-01-21
- 摘要：The morphology and distribution of retained ferrite in 304 austenite stainless steel(0.08C,1.37Mn, 0.62Si,17.77Cr,9.09Ni)2.0 mm cast strip have been studied by chemical etching,colour metallurgraphy and electro- probe microanalyser(EPMA).Results showed that the ferrite in strip surface area presented rod-like morphology and the space between rod was ≤20 μm; in columnar dendrite area,the ferrite located at center of both primary and secondary dendrite arms and the space between ferrite secondary arms was ≤10 μm; in center of strip-equiaxed zone, the morpholo- gy and distribution of ferrite was related to semisolid formation mechanism of equiaxed grains.The ferrite in initially solidi- fied solid-phase particles presented curved dendrite and netlike morphology,while the ferrite in inter-space of initially solid- ified particles presented island morphology.关键词：Twin-roll 2.0 mm Strip Concasting;304 Austenite Stainless Steel;Ferite2|0|0更新时间：2026-01-21
- 摘要：The failure behavior of ultra-high cycle fatigue of a 2 000 MPa grade high strength steel (0.45C, 2. OSi,0.9Cr, 0.001S, 0. 005P, 0.026A1, 0.001 50 , 0.002 8N) melted by 500 kg vacuum induction furnace + electro-slag remelting has been studied by USF-2000 ultrasonic fatigue test machine with resonant frequency 20 kHz, load ratio R = -1, resonant gap 150 ms. Results found that the fatigue crack originated mosdy from non-metallic inclusions (inclusion average size 12.3μm ) ； with increasing inclusion size both fatigue strength and fatigue life of steel decreased； fatigue failure area caused by inner inclusion presented fish-eye shape ； and with decreasing the stress intensity factor range ΔKincat fatigue crack originated site of inclusion, the fatigue life Nfof steel increased.关键词：高强度钢;非金属夹杂物;超高周疲劳;破坏行为2|0|0更新时间：2026-01-21
- 摘要：The equilibrium phases M23C6and MX existing in heat-resistant steel T91 (0.09C, 8. 57Cr, 0.90Mo, 0.19V, 0. 08Nb, 0.04N) at 600 ~ 1 600 °C have been calculated by Thermo-Calc calculation software. Results show that the main equilibrium precipitated phases in steel T91 at 600 ~ 1 600 ℃ are M23C6 and MX, the initial precipitation temperature for M23C6is 860 °C and that for MX is 1 200℃ . In MX phase the rich Nb carbonitrides first precipitate then the rich V carbonitrides precipitate. With increasing Nb, V or N, the amount of MX and its equilibrium initial precipitated temperature increases, in which the effect of N is most obvious.关键词：T91耐热钢;Thermo-Calc软件;M23C6;MX6|0|0更新时间：2026-01-21
- 摘要：The behavior of decarburization sensitivity and oxidation weight loss of three medium carbon spring steels; 0.49C-0.29Si- 1.65Mn,0.53C-0.78Si- 1.56Mn and 0.54C- 1.74Si-0.71Mn(6Si2MnA)heat-treated at 850 ℃ for 5～120 min,water cooling,and at 780～1000℃ for 60 min water cooling has been tested and studied. Results showed that with increasing silicon content in steel,the decarburization depth increased and the weight loss of oxidation decreased. It indi- cates that Si can increase coefficient of diffusion of carbon in steel to improve decarburization of steel.关键词：硅;中碳弹簧钢;脱碳;氧化2|0|0更新时间：2026-01-21
- 摘要：The effect of carbides pile-up degree in high speed steels W6Mo5Ci4V2 (M2) and W9Mo3Ci4V (W9) on mechanical properties and workability of steels has been studied. Results showed that with increasing carbides pile-up degree in steels, the hardness, tensile and yield strength of steel M2 and W9 increased, but the impact toughness and flexural strength and cold drawing ability of steel decreased. The effect of carbides pile-up degree on red hardness and hardness of quenched and tempered high speed steels was minor.关键词：Carbides Pile-up;High Speed Steel;Mechanical Properties;Workability2|0|0更新时间：2026-01-21
- 摘要：The strengthening mechanism of effect of vanadium on structure and properties of hot rolled rebar (0. 21 〜 0. 23C, 1. 33 ~ 1. 50Mn) has been studied by alloying using V-N and ferrovanadium alloy. Results showed that the mechanical properties of 0. 06V rebar were up to the requirement of HRB400 grade and HRB500 grade rebar with alloying respectively by using ferrovanadium alloy and V-N alloy； with same vanadium content, the ratio of precipitates in rebar aloyed by V-N alloy was by 83% ~ 110% more than that alloyed by ferrovanadium. The precipitate strengthen effect in rebar alloyed by V-N was stronger than that in rebar alloyed by ferrovanadium alloy, and main precipitate was V( CN) with less VC. The structure of rebar alloyed by V-N alloy was finer and the steel rebar had plenty of free nitrogen with obviously age- ing phenomena.关键词：带肋钢筋;钒;析出物;强化机理5|0|0更新时间：2026-01-21
- 摘要：Test results showed that for smelting of recycled casting superalloy M17(0. 16C,8.79Cr,5.79Al, 4.93Ti,3.29Mo,15.20Co,0.78V,0.015B,0.073Zr,0.002S,0.001P,0.00110,0.0010N)by a 25 kg vacuum in- duction funace,with increasing repeated smelting number of times,the Si content in alloy increased slightly,while the change of main elements in alloy and deleterious element S,P and H was not appreciable,and the O and N content tended to increase; and the morphology of primary carbides in alloy changed from Chinese script-type in fresh alloy to blocky type in recycled alloy,the inheritance of primary carbides interrupted the back feeding shrinkage passage during alloy solidifica- tion to increase the tendency of porosity formation and significantly decrease the plasticity of alloy at clevated temperature.关键词：铸造高温合金M17;重复熔炼。 返回合金;成分;组织;性能2|0|0更新时间：2026-01-21
- 摘要：A technology of low superheat casting for 150 mm x 150 mm billet by two rollers cooling has been put forward ,that is the molten steel flowing out from tundish into mold through cooling turning rollers to reduce molten steel superheat and improve quality of casting billet. The results of numerical simulation for a 0. 45C steel by hydromechanics analysis software indicated that the superheat of molten steel through cooling roller reduced, the impact depth of molten steel flow in mold was up to 250 mm, it was available to break columnar crystal at forward position of solidification, moreover the molten steel flow field and temperature field in mold distributed homogeneously and the solidification condition of casting billet improved obviously.关键词：Low Superheat;Temperature Field;Flow Field;Casting Billet;Numerical Simulation2|0|0更新时间：2026-01-21
- 摘要：Numerical simulation of flow status of cooling water with flow rate 6～14 m/s in the developed inner U- shape cooling pipe with main radius 54 mm,column height 180 mm,transverse column length 45 mm,cooling water initial temperature 320 K and cooler inner wall temperature 525 K in coupling action of flow field and temperature field has been caried out by an ANSYS finite element software.Results indicated that with lower inlet flow rate,the eddy current easily produced in curved region, with higher inlet flow rate,the higher flow rate produced in curved region to impact the inner wall and decrease its service life.The inner cooler inlet flow rate for optimum cooling effect was 10 m/s.2|0|0更新时间：2026-01-21
- 摘要：The finite element simulation on initial 5 passes multi-pass hot rolling process with deformation 3.4%, 10.4%,25.0%,37.8%,49.4% for Q235 carbon steel(0.14～0.22C)/304 stainless steel(17～19Cr,8～11Ni) clad sheet has been carried out by software MARC to get the distribution of stress and strain at interface of Q235 carbon steel and 304 stainless steel. Simulation results indicated that the stainless and carbon steel can be bonded as both materials being plastic stage and the normal stress at interface being up to or larger than the deformation resistance of 304 stainless steel,and the diference of average strain between both materials being less than 0.01.The simulation results were in a- greement with that of pilot commercial production. It shows that using small reduction ratio at single pass with large cumula- tive deformation rate is available to get excellent combined carbon/stainless clad sheet.关键词：碳钢/不锈钢热轧复合板;界面结合条件;有限元模拟4|0|0更新时间：2026-01-21
- 摘要：The anti-pitting corrosion,anti-stress corrosion and high temperature anti-oxidizing properties of ferritic stainless steels(11%～30%Cr)are better than that of austenitic stainless,but normal feritic stainless steels have higher intergranular corrosion sensitivity, lower plasticity and toughness,and greater tendency to welding crack. It is obtained by analysis that addition of rare earth elements in feritic stainless steels may improve solidification structure of steel,effect precipitating morphology of carbon-nitride,fine grain size,change morphology of sulphide and composition of inclusion in steel,in order to improve transverse toughness of steel, weldability and fatigue property. Therefore the research work of ap- plication for rare earth elements adding in ferritic stainless steel has promising prospect.2|0|0更新时间：2026-01-21
- 摘要：With analysis on producing process and quality of Super304H(0.07～0. 13C,17.0～19.0Cr,7.5~ 10.5Ni,0.001~0.010B,0.3~0.6Nb,2.5~3.5Cu,0.05~0. 12N)steel tube for more than 600 MW ultra- supercriti- cal electric power unit made at home and abroad, it is obtained that in order to get better high temperature mechanical prop- erties and corrosion resistance,the optimum chemical composition control is ≤0.08C,≤3.0Cu,0.0002S,Nb/C≥5, Nb/(C+N)≥2.The key processes such as heat treatment,cold working deformation and shot peening for Super304H steel tube are presented in this article.5|0|0更新时间：2026-01-21
- 摘要：The optimization of rolling schedule using EXCEL calculator in conditions of multi-goals and multiple restrictions has been presented in this paper. The optimizing design program was analyzed by diagrams, the main mathematical models for optimizing calculating were studied and the excellent effect of the optimizing schedule was illustrated by production example. Calculation process indicated that the calculation speed was fast by using EXCEL calculator to optimize rolling schedule, decrease energy consumption and bring the ability of mill into full play.2|0|0更新时间：2026-01-21
- 摘要：The process measures to prevent stopper clogging have been presented by measuring materials of stopper and tundish submerged entry nozale and clogging for casting0.03%~0.06%Al cold heading steel and analysis on forma- tion mechanism of clogging. The measures are to adopted adding high AlMnFe alloy in tapping flow and feeding Al wire with argon blowing; tundish with dam and high liquid lever operation to promote Al2O3floating; whole process protective cast- ing;controling T[0]≤15×10-6after refining; decreasing Si02content in head of stopper and increasing ZrO2content. The casting stopper nozzle clogging obviously decreased by using improved process operation,the average continuous casting heats were ≥12 heats.2|0|0更新时间：2026-01-21
- 摘要：The surface defects of cold rolled 0.8~1.0 mm sheet(≤0.07%C)produced by compact strip production (CSP)line with 900～1600mm×90～50 mm cast slab at Masteel have been analyzed by scanning electron microscope and energy dispersion spectrum analysis.Analysis results showed that the inclusions at surace defects of sheet were mainly Fe0,CaO,SiO2Al203MgOetc.The average surface defects occured ratio of cold rolled galvanized sheet from 12.64% in 2006 to3. 15% in 2007 by using improved process measures such as to control 120 t LF argon blown rate ≤ 200 L/min,use long nozzle from ladle to tundish,use immersed nozale from tundish to mold,reasonably improve flow field in tundish, use shieid agent 39～43Ca0,6~7SiO228～32MgO,2.3Al2O3in tundish and shield slag main ingedient 32CaO,33SiO21MgO,2.8Al203in mold.2|0|0更新时间：2026-01-21
- 摘要：With charging 25%～45% hot metal for a 70 t DC arc funace and using the operation measures such as reasonable oxygen supply mode, based on the requirement of kept back carbon content and phosphorus content in steel to determine slag basicity, it was available to realize dephosphorization and kept back carbon operation by combined blowing technology to avoid intense boilings accident,and the consumption of iron, oxygen and coal gas,and the tap to tap time de- creased respectively from original1075 kg/t,37m3/t,8. 1m3/t and 54 min to1072kg/t,33m3/t,7.7m3/t and 52 min,only the electrical power consumption increased from original 338 kWh/t to 344 kWh/t.2|0|0更新时间：2026-01-21
- 摘要：The φ300~350 mm high quality heavy round sections of GCr18Mo high Carbon Chromium bearing steels have been succsssfilly produced by hot metal +scap-60 tare fnmace-LF-RH-5 tingo casting-hot rolling/ hotfog. ing process at Daye Special Steel.Results showed that with the process measures such as hot metal chare rtio 30~60%%. controlling deleterious residual elements in scrap and alloy matenals,LF refining. RH yacwm treament.sott Arblowing amd Ar gas shield casting, the As content in the high cleanlincss beayy ound seetions of CGr18Mo beaing steel wes 0.010%~ 0.012%,(As+Sn+Sb)0.022%～0.025%,Pb0.0007%~0.0011%,Ti(17～19)×10-6Ca3×10-6[0](6.5~6.7)×10-6and rating of Agade inclusion was0.5~1.5,B gnde0~1.0,Cgnde0,and D gade 0.5~1.0.4|0|0更新时间：2026-01-21
- 摘要：The 5 mm T510L(0.20C,1. 17Mn)high strength steel strip was produced by FTSR(Flexible Thin Slab Rolling):hot metal pretreatment- 150tLD-LF-85 mm slab casting - control continuous rolling process.Test results showed that the structure of 5 mm T510L strip was fine and uniform with average grain size7.0 μm; the tensile strength of steel was 625 MPa,elongation 28%,tough-brittle transition temperature -60 ℃;and the steel strip had excellent form- ability with strain-hardening exponent n value 0.210.2|0|0更新时间：2026-01-21
- 摘要：A low carbon Bainitic steel XDB685[≤0.09C,1.20～1.60Mn,0.015～0.055Nb,0.008～0.030Ti, 0.2~0.6(Cr+N+Mo+B)] has devebped by using TMCP(Themomechanical Controlecd Pnsess)- RPC(Rdlaxed Pncess Contal)"-T(Tempering)technology. Test esulls showed thet the yidld strengh of40～60 mm steel plate was ≥600 MPa,the tensile strengih was ≥700 MPa, the impact energy at -40℃ was about 200 J,and the steel plate had excellent weldability.2|0|0更新时间：2026-01-21
- 摘要：Results of examination and analysis indicated that in normal non high temperature diffused-superfining trea- ted H13(4Cr5MoSiV1)steel products there were massive eutectic carbides with serious banding segregation and transverse impact toughness of steel was lower; and in available high temperature difused and superfning treated H13 steel products, the eutectic carbides were basically dismissed,the banding segregation and structure homogeneity improved obviously and the transverse impact toughness of steel increased appreciably.关键词：热作模具钢,&超细化组织, 碳化物, 性能8|0|0更新时间：2026-01-21
- 摘要：Test results indicated that 14.3 mm HTP line-pipe steel strip(0.056C,1.21Mn,0.07Nb,0.01Ti)had seriols anisotropy, the charpy V-otshimpact energy and delamiratig crack tendency of sample perallelod to rling lirec- ton wls obviously higher han that of samples being45° and vetical o mling diecion at same icmperature. The ddlami- naig eack was calaed by stip deice, it we efeied dialoeation confguation wih cerain direstion feature and related to temperature.关键词：HTP Line-pipe Steel;Impact Toughness;Delaminating Crack;Sampling Orientation4|0|0更新时间：2026-01-21
- 摘要：The effect of bending radius(2.5~7.5 mm),tension load(20～80 N)and rolling direction of specimen on reversed bending times of imported cold rolled non-orientation silicon steel sheet has been tested. Results showed that as bending radius R was 5 mm,with increasing tension load from 20 N to 60 N,the reversed bending times of longitudinal specimen decreased from 24 to11,and with increasing tension load from 60 N to 80 N,the reversed bending times was constant; and as tension load was 60 N,with increasing bending radius R from2.5 mm to 7.5 mm,the average reversed bending times of longitudinal specimen increased from 6.5 to20.7.The reversed bending times of longitudinal specimen was higher than that of transverse specimen by 6.6%~22.7%.关键词：冷轧无取向硅钢片;反复弯曲;影响因素2|0|0更新时间：2026-01-21
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