最新刊期
卷 26 ， 期 3 ， 2005
- 摘要：The large-volume are fumace and continuous caster for alloy steels were built and imported at domestic main special steel works during end of the nineties of 20th century thus to bush the development of continuous casting technology for special steel in China forward. The casting billet size of alloy steel was between 130 mmx130 mm and 350 mm×470 mm and alloy steel slab size was between 1030 mm x160 mm and 1900 mm×300 mm. The continuous casting production in percent of domestic special steel inereased from 21.7% in 1998 to 61. 17% in 2003. According to the key technology and advance of continuous casting at overseas' special steel producer, and based the analysis on production equipment, flow sheet, output of continuous casting billet and quality status of main continuous casting products in china in recent years,the development and research work for special steel continuous casting technology in China are put forward in this paper.关键词：特殊钢;连铸技术;发展4|0|0更新时间：2026-01-21
- 摘要：The numeric simulation of effect of X-shape submerged nozzle on flow of molten steel in a mold for 160 mm x 160 mm concasting billet has been carried out by viscous fluid mechanics theory and CFD software Fluent. It was verified that during pouring with X-shape submerged nozzle, the vortex molten steel entering into mold by guide of vortex guidance channel which was formed with top and bottom surface of two semi-oval flow guidance plate and invert taper pipe to availably reduce impact depth, promote inclusion and gas bubble aggregating and floating off, and improve concasting efficiency.2|0|0更新时间：2026-01-21
- 摘要：The true stress - strain curves of Nb- bearing low carbon steel Q345C (0.056C, 1.20Mn, 0.052NB, 0.033V, 0.012Ti, 0.005 2N)52 mm concasting thin slab during high temperature deformation by CSP (compact strip production) rolling have been simulated and studied by Gleeble-1500 thermal simulation tester, and the mathematical model and critical conditions of dynamic recrystallization have been obtained, that are Z = 9.7 x1011exp (25 εcand Z = 1.77 x 1012 exp (15.8 εs), where Z- deformation factor, εc- critical deformation of initially occurred dynamic- recrystallization,εs- critical deformation of complete recrystallization. It is available to decrease mixed grain size structure in plate by utilizing recrystallization model to avoid rolling in incomplete recrystallization zone between rolling pass.2|0|0更新时间：2026-01-21
- 摘要：The flux agents in common mould powder normally are fluoride and sodium oxide, both all produce environmental pollution. Therefore the physical properties such as melting point, viscosity, crystallizing properties and surface ten- sional force of mould powder containing flux agent B₂Os were studied. The test results showed that for the mould powder with CaO/SiO₂= 0.88 and ingredient being 37.91%CaO-43.09%SiO₂-5%A₂O₃-5%MgO-2%Li₂O-7%B₂O₃,the melting point was 909℃, the flexible melting temperature was 1160 ℃, viscosity value at 1300 ℃ was 0.4 Pa's and surface tensional force was 0.32 N/m which could meet the service requirements of concasting mould powder for normal steel grades and some special steel grades.关键词：连铸, 含硼保护渣;无氟, 物理性能2|0|0更新时间：2026-01-21
- 摘要：Based on the hot simulation test the effect of deformation condition and microalloying element 0.0180.056NB, 0.01 - 0.02V and 0.01 - 0.02Ti on behavior of hot deformation of 0.06 - 0.08C test steel has been analyzed. And based on the Sellas-Tartat equation, the mathematic models to calculate the stress- strain curves have been established, that are dynamic recover modelσ(e)+ (σp+σo)[1-exp(-3.23ε/εs)]0.5whereσp- peak stressσo- stress at onset of plasticstrain, ε- strain,εs-strain to onset of steady state by work hardening and recovering, and dynamic recrystallization model -σ=σ=σ(e)-(σp-σss)｛ 1- exp[-2.363(ε-εc)εc0.3425)2｝whereσss-stress to onset of steady state by dynamic recrystallizationεc-strain for onset of dynamic recrystallization. The predicted results to rolling force by the models conform with that of measured value of 0.07C-0.018Nb test steel during commercial rolling.6|1|0更新时间：2026-01-21
- 摘要：The effect of flow control devices with different size and installed location on fluid flow in a thin slab conca-sting tundish at Maanshan Iron and Steel has been investigated by physical and mathematical hydraulics- simulation. The re- sults showed that as tundish hadn't flow control devices there were a short flow and a big dead zone volume; and with using the flow control devices provided by SMS, the applying result wasn't optimum due to short average residence time and bigger dead zone volume; and with using the improved optimized flow control devices, the onset response time was more than two times as long as that without using flow control devices, the average residence time increased to 301.4s from 264.0s,and the dead zone volume decreased to 15.39% from 25.54% obviously to improved the metallurgical capability.关键词：薄板坯;中间包;控流装置;数理模拟5|0|0更新时间：2026-01-21
- 摘要：The three dimensional mathematic models of 18- pass continuous hot rolling for 304 stainless steel tod and wire have been established using three dimensional thermomechanical coupled elastic- plastic finite element method (FEM) by commercial finite element software MSC.Marc. The process is simulated using three continuous models, a rigid surface at end of each rolling pass is employed to make the workpiece run, and the data between each two model are transferred by interpolation to get temperature fall curves at center, medium and surface of same section of 304 stainless steel workpiece during the process from outlet of heating furnace to end of 18th pass rolling.The results showed that the calculated value coincides with measured value with error 5～50℃.关键词：304不锈钢;热连轧, 温度场;数值模拟2|0|0更新时间：2026-01-21
- 摘要：The effect of austenite grain size and deformation(true strain 0.4) of gear steel 0.23C-0.74Mn-0.90Cr on continuous cooling transformation(CCT) structure and CCT curves have been studied by Gleeble 1500 hot simulator. Test results showed that as gear steel without deforming, the critical cooling rate to get complete polygonal ferrite + pearlite structure was 0.5～1 ℃/s, as cooling rate quicker, the products of medium temperature transformation consisted of bainite and acicular ferrite; as austenite deforming the polygonal ferrite initial transformation temperature went up, the cooling rate to get complete polygonal ferrite + pearlite structure up increased to 1～2 ℃/s, and the medium temperature transformation product was only acicular ferrite without bainite observed.2|0|0更新时间：2026-01-21
- 摘要：In general the special steels contain given alloying element, of which the solidification state is different from general carbon steel more easy to produce composition and structure segregation and surface crack of casting billet. Therefore it is necessary to increase cleanliness of liquid steel during special steel steel making, decrease inclusion content and improve inclusion morphology, and using low overheating liquid steel(10～15 ℃)casting and shielding casting technology to prevent liquid steel secondary oxidizing,decrease segregation of composition and structure of casting billet, increase surface quality and internal density of billet. the casting shielding technology, tundish metallurgy, electromagnetic stirring, soft reduction at solidification end, specific mold powder for special steel casting,and automation technique are presented,and the process parameters for special steel casting, existent issue and countermeasure are discussed in this article.2|0|0更新时间：2026-01-21
- 摘要：The cold heading steel coil generally is low and medium carbon quality steel and alloy structure steel to manufacture various standard mechanical element and fastener by cold heading forming. As the element and faster are formed by cold heading process, the cold heading steel has high cleanliness, to control Si and Al content in steel, and has fine grain and spheroidal cementite structure produced by controlled rolling and cooling process to avoid occurring martensite, bainite and Widmannstatten structure and increase plasticity and cold heading properties of steel. The evolution and production of cold heading steel, the effect of chermical compositions on cold heading properties and the characteristics of production process of cold heading steel are presented in this paper.2|0|0更新时间：2026-01-21
- 摘要：The general chemical compositions of microalloyed intragranular ferrite steels are 0.2~0.4C,0.2～0.8Si, 1.0~1.7Mn,0.05～0. 15V. It is a main measure to increase the strength and toughness of ferite-pearlite microalloyed steel using recrystallized forging and rolling to control cooling rate in phase transformation range in order to promote formation of fine dispersed intragranular ferrite structure. Recently an important advance to increase strength and toughness of this steel is to select suitable deoxidizing process, get fine, dispersed oxides with definite ingredient which become precipitated nucle- us of MnS, VN and V4C₃ .The chemical compositions and production of microalloyed intragranular ferrite steels at home and abroad are presented and the formation mechanism of intragranular ferrite is analyred in this paper.2|0|0更新时间：2026-01-21
- 摘要：The φ18mm and φ26mm test stel products of new high strength and toughness spring steel 40T;0.41C- 2.12Si- 1.03Cr- 1.98Ni-0.31Mo-0.25V,steel 44T:0.44C-2.28Si- 1.42Cr-0.25V and spring steel 60Si2CrVA:0.59C- 1.65Si- 1. 11Cr-0. 18V were produced by 20 t are fumace melting, rolling and cold drawing. The results of each steel product by heating decarburizing test showed that due to lower carbon content and contained ～2% Ni in steel 40T, the decarburization trend of steel 40T obviously lower that of steel 44T and steel 60Si2CrVA: heating at 880 ℃ for 1h, there was nodecarburization in steel 40T, depth of decarburization layer was 0.05mm in steel 44T and 0.15 mm in steel 60Si2CrVA; and heating at 1000 ℃ for 20 min, the depth of decarburization layer was 0. 1mm in steel 40T, 0.2 mm in steel 44T and 0.4 mm in 60Si2CrVA. The smaller decarburization trend of steel 40T is favourable to increase the fatigue life of spring.关键词：新型弹簧钢, Ni,& 高强韧性, 脱碳倾向2|0|0更新时间：2026-01-21
- 摘要：Secondary refining, continuous casting and multi-roll mill technology are three main and important technol- ogies to promote rapid development of stainless steel production in world. Aiming at deformation characteristics of the stain- less steel and basic requirements to the cold rolling mill, the commonly used single stand and reversing cold mill and cold tandem mill in recent plat and strip production for stainless steel - Sendzimir ZR mill, SUNDWIG four post mill and SMS- SB twin stand mill are introduced and described, of which the recent development is presented in this article.关键词：Stainless Steel;Cold Rolling Mill;Sclection2|0|0更新时间：2026-01-21
- 摘要：The railway frog made of 1. 14C- 12.72Mn high manganese steel has excellent work- hardening behavior, but it often fails ahead of expected using life because of nose rail spalling during service. It showed by analysis on fracture of railway frog that corrosion- fatigue failure led to surface spalling of frog, and the corrosion- fatigue resistance decreased due to the inclusions of Al₂ O, and Calcium aluminate existed in surface structure and with work hardening the surface high hardness and formed thick and dense slip line band, and with the surface hardness of high manganese steel increased by big mar- gin, the toughness and plasticity of steel obviously decreased led to frog surface spalling. Increasing cleanliness of steel, adding anti- corrosion element Ni and Cu and microalloying of steel are main measures to prevent frog surface spalling.关键词：铁路辙叉;高锰钢;表面剥落;腐蚀疲劳8|0|0更新时间：2026-01-21
- 摘要：The experiment of commercial heat treatment process for 82 mm plate of steel 14Cr1MoR (0. 15C- 1.48Cr- 0.57Mo)has been carried out at Wuyang Iron and Steel. The test results showed that heat- treated with 9℃/min heating up speed, austenite conditioning at 930 ℃ for 2.4 min/mm,water quenching at 870 ℃,and tempering at 680 ℃ for 3.0 min/mm, air cooling,the structure of steel was sorbite, of which the ambient tensile strength was 590～650 MPa, yield strength 445～485 MPa,elongation 27%～28%,reduction of area 73%～75%,cross impact energy 173～212 J, and the Qo.z at 580℃ was 295～330 MPa. The properties of different parts of plate were uniform up to the requirement of stan- dard.关键词：14CrlMo钢;厚板;热处理工艺7|0|0更新时间：2026-01-21
- 摘要：The surface temperature of profiled beam blank of Nb microalloying steel SM490YB-0.09～0. 13C,1.35 ~1.50Mn,0.04～0.06Nb during concasting by CIT-M Infrared Pyrometer. The results showed that the traverse surface temperature of beam blank was uneven, the surface temperature of beam at measured location in secondary cooling and straightening area were generally in the brittle low temperature range between 650 ℃ and 750℃ of steel SM490YB; and due to interval water spraying cooling between supporting rollers,the re-rise rate of temperature of beam surface between some supporting rollers in secondary cooling area was higher than 100 ℃/m the limits of metallurgical rules. It shall be to adopt weakening cooling process during casting profiled beam and adjust distribution of spraying nomles in order to increase the surface quality of profiled beam.关键词：Nb微合金化钢;连铸异型坯;表面温度2|0|0更新时间：2026-01-21
- 摘要：The main chemical compositions of spring steel 38SiMnVBE are 0.37～0.42C,0.80～1.20Si,1.20~ 1.60Mn,0.08～0. 14V,0.0005～0.0035B,and the steel requires P≤0.025%,S≤0.015% and[0]≤15×10-⁶. The strength of steel 38SiMnVBE is 1905～2020 MPa,0.2% yield strength 1715～1850 MPa,elongation 9.0%~ 11.5%,reduction of area 44%～54%, which are higher than that of DAC series spring steel and steel 60Si2CrV in present ISO and state standard. The steel 38SiMnVBE has excellent hardenability. The test and application of the steel used for high stress and properties auto leaf spring, variable section leaf spring, suspend self spring have been carried out.关键词：高强韧性;高淬透性;弹簧钢38SiMnVBE2|0|0更新时间：2026-01-21
- 摘要：The φ25 mm bar of microalloying stocl F40MnV- 0.39～0.43C,1.20- 1.36Mn,0.07～0. 10V 0.009～0.024P,0.011～0.018S was produced by a 55 t converter + 60 t ladle refining fumace,150 mm×150 mm 4 strand concaster, short- stressed continuous rolling mill strain process. Okygen content in steel [0] was(18,8～20.5)x 10-6and[N] was(35.2～53.2)×10-6The chemical compositions, mechanical properties, cleanliness and micro- ant macrostructure of steel are all up to the requirement of standard and the demand of customers, VN alloy shall be selecter adding during microalloying of steel to increase the nitrogen content关键词：Microalloying Steel F40MnV;Converter;Ladle Refining Fumacs2|0|0更新时间：2026-01-21
- 摘要：The Φ150 mm microalloy steel 48MnV (0.42～0.47C,0.98～1. 18Mn,0.06～0. 10V,0.008～0.035S, ≤0.025P)was produced by the flow sheet: hot metal pretreatment- 120t converter blow melting- LF refining- 4.8t ingot ca- sting- 800 mill rolling for hot forging at Benxi Steel. The nitrogen content in steel was trimmed by adding N-Mn alloy with argon stiring during LF refining,after refining feeding Si-Ca wire. The analysis results showed that hydrogen content in steel was(0.6～1)×10-⁶,oxygen content (8～15)×10-⁶ and nitrogen content (108～149)×10-⁶;The mechanical proper ties were tensile strengtho 815～880 MPa, yield strength σs490～587 MPa,elongation ð515%～21%,reduction of area ψ32%～44%,impact&n value as40～54 J/cm² to meet the requirement of standard.3|1|0更新时间：2026-01-21
- 摘要：By using 100 t arc fumace steelmaking with hot metal + pig iron + quality sorap charging, LF secondary refining, concasting billet hot feeding(temperature for heat fumace ≥550 ℃),and automatic determinant system for quali- ty of concasting billet, the S, P content in steel tube blank for high pressure boiler including 20G,25MnG,SA-210C, 15CrMnG,12Cr1MoVG, SA-213 T12 designations produced at Xingcheng Special Steel was ≤0.025%,residual Cu≤ 0. 18%,(As+Sn+Sb+Pb+Bi)≤0.028%,and has higher cleanliness and quality level of products.关键词：Tube Blank;Steel for Tube of High Pressure Boiler;Residual Deleterious Elements2|0|0更新时间：2026-01-21
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