最新刊期
卷 27 ， 期 6 ， 2006
- 摘要：The isothermal tempering embrittlement test of 2. 25Cr-lMo alloy steel (% ： 0. 15C, 2. 32Cr, 0. 95Mo, 0. 011S,0. 009P,0. 006 8As,0. 003 5Sb,0. 007 9Sn,0. 01V) for hydrogenation reactor with 146. 7 MPa applied stress at 468 ℃ for 125 h and 400 h has been carried out. Based on the relation curves of temperature and impact energy of hydrogenation reactor parent metal sample at 3 kinds of status - de-embrittling, embrittling and applied stress, the temper embritdement transition temperature VTr54.2(℃) value at each status and temper embrittlement damage ΔVTr54.2(℃) were obtained. The results showed that temperature and isothermal time were main factors led to material embrittlement while the influence of applied stress on temper embrittlement of 2. 25Cr-1Mo steel was not obvious.关键词：2.25Cr-1Mo钢;加氢反应器;作用应力;回火脆性2|0|0更新时间：2026-01-21
- 摘要：The dissolution and precipitation of Nb-Ti carbides in austenite of a low carbon microalloying steel (0.09C,1.42Mn,0.035Nb,0.012Ti)have been analyzed by theoretical calculation method,and the austenite grain size with different heating temperature and the hardness of steel after solid solution treatment -aging were examined. The results showed that Nb-Ti carbide completely dissolved at 1060 ℃ and almost Nb and Ti in austenite precipitated in the form of NbC and TiC at 800 ℃ aging. At 700 ℃ aging the Nb-Ti carbides precipitated in ferrite,and with decreasing temperature the carbides precipitation decreased. The hardness of steel was up to maximum value as aged at 600 ℃.关键词：Nb-Ti Microalloying Steel;Carbide;Dissolution;Precipitation2|0|0更新时间：2026-01-21
- 摘要：The influence of BaO(2%~8%)on melting and crystalline temperature of concasting mold powder-3~ 5 MgO,1~2 Al₂O₃,8Na₂O,3～4B₂O₃,2Li₂O,3～4 Cand the crystalline phases of free fluoride mold fluxes have been studied and analyzed. The results showed that with increasing BaO content from 2% to 8%,the melting temperature of mold powder decreased obviously from 1053 ℃ to 1011 ℃ while the crystalline temperature decreased minor from 954 ℃ to 948℃;the crystalline mineral phase of free fluoride mold fluxes was melilite which was solid solution of aluminium- melilite(Ca₂Al₂SiO₇),akermanite(Ca₂MgSi₂O₇)and sodium-melilite(NaCaAlSi₂O₇),and it is available through adjustment of crystalline rate of melilite in fluxes to control the heat transfer between mold and shell of strand.2|0|0更新时间：2026-01-21
- 摘要：The finite element simulation of stress and strain of 230 mm slab with casting rate 1.0 m/min and 3 different roller ways layout-single-point,four-point and continuous straightening have been carried out by elastoplastic finite element method. The results showed that the equivalent Von Mises stress and horizontal stress of slab decreased in turn in single-point,four-point and continuous straightening; compared with single-point straightening,the each point straightening stress and strain rate decreases obviously in four-point straightening; and in continuous straightening,the equivalent plastic strain changes linearly in deformation area up to maximum value 1. 11% with lower equivalent plastic strain rate-about 5.5×10-5s-1its strain rate is minimum,it is a ideal straightening process.2|0|0更新时间：2026-01-21
- 摘要：Single pass reduction deformation experiment of a Ti-IF （interstitial atom free） steel - 0. 009C, 0. 017Si, 0. 13Mn, 0. 012P, 0. 013S, 0. 05Ti, 0. 025Als with deformation rate 0. 1, 1 and 20 s-1at 750 °C and 850 °C has been carried out by Thermecmastor-Z thermal simulation machine. The curves of work hardening rate - strain for the Ti-IF steel, the dynamic recrystallization diagram and the volume fraction equation of dynamic recrystallization were obtained. Test results show that for the stress-strain curves with no obvious peak strain, it is a available to use work hardening rate method to determine peak strain and stable strain.关键词：Ti-IF钢;加工硬化率;峰值应变;动态再结晶2|0|0更新时间：2026-01-21
- 摘要：Based on established a model for changing of MnO content, it was obtained that with increasing apparent rate constant k, flux-steel interfacial area and reacting time, the MnO content in flux increased. The initial (MnO) and initial [Mn] influenced MnO content in flux. The test results showed that during steel 16Mn 4)300 mm billet concasting, the initial MnO content in flux was 1. 5% , after casting for 30 min it increased to 2. 2% ； and during steel Q235 slab casting, as initial (MnO) in flux increased from 0% to 2. 51% , the melting temperature of flux decreased from 1 069 Y to 1 063 ℃ , of which the viscosity at 1 300 ℃ decreased from 0. 165 Pa , s to 0. 142 Pa • s.关键词：结晶器;保护渣;MnO含量;模型4|0|0更新时间：2026-01-21
- 摘要：The effect of 1200 ℃ heat treatment and 40%～60% hot deformation at 1050~950℃ on diameters and volume fraction of carbide in 3 mm cast-strip of high speed steel M2(W6Mo5Cr4V2)using Gleeble 1500D auto thermo- simulation machine have been studied by quantitative metallographic examination. The studied results showed that the car bide size in steel M2 was fined and distribution of carbide was improved in cast-strip by high temperature heat treatment and hot deformation,and 1200 ℃ 40 min heat treatment + 50% hot deformation was available to get fine carbide(0.96 μm) and homogeneous distribution.关键词：M2 High Speed Steel;Twin-Roll Casting Strip;Heat Treatment;Hot Deformation;Carbide2|0|0更新时间：2026-01-21
- 摘要：The prediction model of end point temperature of molten steel refining in a 40 t ladle furnace has been developed bya modified artificial neural network calculation method. Compared with traditional Back-Propagation (BP) network calculation method, the modified artificial calculation method can increase prediction efficiency and precision. The examination in production situ showed that using modified BP artificial neural network calculation method, the heats percentage with ±5 ℃ error of prediction temperature of molten steel was 90% , while using traditional BP artificial neural network calculation method, that with ±5 ℃ error of prediction temperature only 77% .关键词：LF精炼;BP神经网络;钢水温度;预测2|0|0更新时间：2026-01-21
- 摘要：Dynamic continuous cooling transformation(CCT)curves and structure transition of non quenched-tempered steel 34Mn2VN(0.30~0.34C,1.20～1.70Mn,0.014～0.018N,0.07～0. 12V)at 950℃ with average strain rate 2 s-¹and 15% strain, then cooling with 0.1～45 ℃/s different rate have been studied by Cleeble-1500 thermal simulation machine. The results obtained that as cooling rate was controlled within 0.8~2.0 ℃/s,the fine ferrite and minor bainite structure was obtained, it had higher impact toughness. Commercial production application showed that the impact energy of φ139.7×7.7(mm) and φ114.0×6.4(mm) steel tubes produced with that cooling rate was 47.8～50.9 J.关键词：非调质钢34Mn2VN; 动态CCT 曲线;组织;冲击韧性2|0|0更新时间：2026-01-21
- 摘要：The test results with electron backscattered difraction(EBSD)and scanning electron microscope(SEM) study and mechanical properties examination show that the structure of microalloying X70,X80 and X100 pipeline steels consists of acicular ferrite,granular bainite and a little lower bainite,and with decreasing effective grain size,increasing bainite content and improve structural homogeneity the strength and toughness of high grade pipeline steels increase obviously.关键词：高钢级管线钢;背散射电子显微镜;有效晶粒度;针状铁素体;贝氏体;强韧性2|0|0更新时间：2026-01-21
- 摘要：The test results showed that the volatilization rate of block pure molybdenum oxide(MoO₃)in heating period from 600 ℃ to1100 ℃ for 5 min was 30%,which of powder was up to 40%.As CaO reacts with MoO₃ to form CaMoO₄ to decrease the activity of MoO₃,the added CaO could depress the volatilization of molybdenum oxide. With increasing added percent of CaO the volatilization of molybdenum oxide decreased,which decreased to 1.0% with added 20% CaO.The scheelite also could depress the volatilization of molybdenum oxide,of which the depression effect was inferior to that of CaO. Al₂O₃ and SiO₂ had no effect on depressed volatilization of molybdenum oxide.关键词：&MoO?;CaO 抑制挥发;直接合金化2|0|0更新时间：2026-01-21
- 摘要：The medium carbon alloy steel Cr-Ni-Mo was melted by a 50 kg vacuum induction furnace, and the mechanical properties of test steel-maximum load and reduction of area at 600～1400 ℃ have been measured by Gleeble-3800 test machine. The test results showed that brittle region(reduction of area ≤60%)of the medium carbon Cr-Ni-Mo steel was 910~700 ℃ and its plastic region was 1320~910 ℃.Its cast billet shouldn't be straightened at 910~700 ℃ in order to decrease cast billet crack.关键词：Medium Carbon Cr-Ni-Mo Alloy Steel;High Temperature Mechanical Properties;Crack Sensitivity2|0|0更新时间：2026-01-21
- 摘要：A new die steel W4Mo3Cr4VRE(0.78～0.88C,3.50～4.50W,2.50～3.50Mo,3.80～4.40Cr, 1. 10~1.60V,0.15～0.25RE)was smelted by using high speed steel filings of grinding DRI(sponge iron 0.44C- 4.62W-3.27Mo-2.20Cr-0.98V)with definite amount scrap of high speed steel turnings(0.87C-3.50W- 1.30Mo- 1.50Cr- 0.60V)in a 250 kg induction furnace and refined by ESR. Examination results showed that with 1180℃ quenched + 250 ℃ double tempered the HRC hardness value of ESR steel was ≥60,toughness impact ≥49 J/cm²,and with 1150 ℃ or 1180℃ quenched + 560℃ double tempered,the HRC hardness value of ESR steel was up to 66.The study results confirm that it is available to recover and reuse the filings of grinding by magnetic separation,direct reduction and electric furnace melting,and the produced new die steel can meet the requirement of application performance of refractory products die.关键词： 高速钢磨屑;直接还原;W4Mo3Cr4VRE 模具钢2|0|0更新时间：2026-01-21
- 摘要：The EAF dust at stainless steel works mainly consists of ejected liquid drops of metal and slag formed by breaking of CO bubbles produced by alloy elements evaporation and decarburization reaction and small particles of charging exhausted with waste gas. Comparison with EAF dust at carbon and low alloy steel works,the EAF dust at stainless steel works contains more alloy elements but zinc content is lower.At present the primary technology for reclaimed and treated dust at stainless steel works is smelting reduction process.关键词：不锈钢;电弧炉;烟尘;处理技术2|0|0更新时间：2026-01-21
- 摘要：The transverse cracks with length 10～30 mm and maximum wide 2 mm at billet corner vibrating mark trough of pickled 300 mm×320 mm low carbon steel cast bloom produced at Xingcheng special Steel were observed. The production practice indicated that as [Al,] of SA-210 series steel for boiler(0.13～0.25C,0.45～1. 10Mn)increased from 0.009% to 0.021% the index of transverse crack at corner of casting bloom increased from 0.03 to 2.64,while with adding micro titanium in steel the transverse crack at corner of casting bloom decreased obviously as micro titanium is avail able to improve hot forming ability of steel at lower deformation rate. The formation of transverse crack at corner of casting bloom of SA-210C steel was avoided by control adding Al amount to ensure [Al,]≤0.010%,adding Ti to get about 0.02%[Ti],and adopting the operation measures such as to increase molten steel flowability and cast bloom straightening temperature ≥900℃.关键词：连铸方坯;低碳钢;角部横裂;[Alt]& [Ti]4|0|0更新时间：2026-01-21
- 摘要：Because the sulphur content in steel NVA32(0. 12~0. 18C,1.30～1.60Mn)increases to 0.020% at 210 t BOF melting end point from original 0.005%,it shall be added 1000 kg binary synthetic slag CaO-CaF₂ and added 200 kg aluminium during BOF tapping and added Si-Mn alloy and Si-Al-Ba alloy to decrease sulphur content in steel by 0.007%～0.008% with desulphurization rate up to 30%.During LF refining,sulphur content in steel further decreases to 0.001%～0.002% by further added 800 kg synthetic slag,blown argon 600~900 L/min,after heating fed 600 m silicon- calcium wire then blown argon 30~45 L/min for 10 min with end slag basicity R = 4.5～5.5.关键词：氧气转炉;出钢脱硫;LF 精 炼;超 低 硫 钢4|0|0更新时间：2026-01-21
- 摘要：The influence of heating temperature(1200 ℃,1180℃)of 180 mm cast slab,rolling passes for 2.3 mm hot coil(7 pass and 5 pass),finishing rolling temperature(780~860℃)and coil temperature(≤710℃)on iron loss and magnetic intensity of 0.5 mm cold rolled non-oriented silicon steel 50W600 has been tested. The results showed that decreasing heat temperature of cast slab, increasing finishing rolling temperature and coiling temperature were available to improve magnetic properties of the cold rolled non-oriented silicon steel; while the rolling passes had no significant influence on magnetic properties of steel products.关键词：Hot Rolling Process;Cold Rolled Non-Oriented Silicon Steel;Magnetic Properties2|0|0更新时间：2026-01-21
- 摘要：The phases of clogging of nozzle during concasting of 409L stainless steel(0.009～0.011C,11.36~ 11.63Cr,0. 15~0.22Ti,0.0074～0.0112N)melted by EAF-AOD-VOD refining has been analyzed by scanning electron microscope(SEM)and X- ray diffraction method. The results indicated that phases of clog in nozzle consisted of TiO₂ and metal;and with over strong argon stiring after titanium wire feeding the amount of TiO₂ inclusion obviously increased due to reoxidization of molten steel, it led to clog being obvious thickening. The clogging of submerged entry nozale decreased by using soft argon stiring after titanium feeding to remove TiO₂ inclusion in molten steel and avoiding reoxidization of cast strand.关键词：409L不锈钢;TiO?; 连铸;浸入式水口;结瘤5|0|0更新时间：2026-01-21
- 摘要：With 50 kg vacuum induction furnace melted ingot,breakdown at 1150 ℃ and two stage control rolling, 12 mm plate finishing rolling at 830 ℃,then relaxation for 27 s,water cooling at 720 ℃ with cooling rate 30~35 ℃/s, the ultra-low-carbon bainite steel-0.023C,1.63Mn,0.52Cu,0.25Mo,0.055(Nb+Ti),0.0011B had compound structure consisting of lath bainite + minor granular bainite,and irregular ferrite. The bainite bunch colony size was 3~5 μm and the lump and irregular ferrite size was1~2.5 μm. Tempering at 650 ℃ and 700℃ weren't obvious influence on bainite grain orientation.关键词：Ultra-Low-Carbon Bainite Steel;Equivalent Grain Diameter;Tempering2|0|0更新时间：2026-01-21
- 摘要：According to principle of swing control in electroslag remelting process and metallurgy model of swing control and melting curves using computer intelligent PID calculation method to trace and control,the quality of electroslag remelting ingot improved obviously as secondary current swing control for a 10 t electroslag remelting unit at Xingtai Machinery was carried out to get constant electrode remelting rate and period,of which the first class rate increased from original 75% to 90%.关键词：Electroslag Remelting;Secondary Current;Swing Control;Application2|0|0更新时间：2026-01-21
- 摘要：The structure and properties of steel with three kinds heat treatment processes - quenched at 880 ℃ for 30 min oil cooling + tempered at 600 ℃ for 60 min air cooling,normalized at 860 ℃ for 30 min air cooling and two-phase region subcritical treated at 780 ℃ for 30 min air cooling,in order to get a simplified heat treatment process of 40SiMnCrNiMo for rock drill tools. The results showed that the HV microhardness value at bainite region of subcritical heat treated steel lowed than that of normalized steel and V- notched impact energy was 30 J higher than that of normalized steel (12J)and approached to that of quenched and tempered steel(40 J). The test for service life of rock drill tools indicated that as compared with average 10.78 m drill pace of advance of normalized steel tool,the average drill pace of advance of suberitical treated steel tools was 108.30 m to meet the requirement of use and to be available to replace quenched and tempered drill tools.关键词：High Strength Steel 40SiMnCrNiMo;Rock Drill Tool;Suberitical Heat Treatment;Structure;Mechanical Properties2|0|0更新时间：2026-01-21
- 摘要：The microalloying steel 15Mn2CrVNbE(0. 13~0. 17C,1.44～1.59Mn,0.30～0.60Cr,0.02～0. 10V, 0.02~0.05Nb,0.02~0.05Al)for trigging girder has been produced by hot metal desulphurizing -80 t LD melting-LF (feeding wire)refining - 4 strand billet concasting process at No3 steelmaking plant,Shougang. The production results (149 heats)showed that with control of Al content in steel,argon stirring,feeding silicon-caleium wire,whole course shielding casting technology,the oxygen content in billet was(7～26)×10-6nitrogen content was(29～79)×10-6and the mechanical properties of trigging girder products were σs465～575 MPa, σb630～720 MPa,δ₅25%~34% and -40 ℃ longitudinal impact energy 36~183 J,which met the requirement of service.关键词：Microalloying Steel 15Mn2CrVNbE;Trigging Cirder;LD-LF Process2|0|0更新时间：2026-01-21
- 摘要：The φ350 mm heavy forging products of 17-4PH precipitation hardening stainless steel were produced by EAF-VOD process melting and pig iron mold bottom casting φ320 mm electrode of 17-4PH steel(≤0.04C,16.20~ 16.50Cr,4.50~4.70Ni,3.30～3.40Cu,0.25～0.40Nb),then remelted to 2.5 t(φ510～550mm)ESR ingot and forged by 800 t hydraulic press or 5 t steam hammer. The process practice showed that it was available to avoid cracking of the steel after forging by controlling end forging temperature(steam hammer 980 ℃;hydraulic press 1050℃), soaking forged φ350 mm 17-4PH steel products in cover-type furnace(1130~1150℃),then slow cooling to(1050±10)℃ and soaking, fumnace cooling to 420℃,and in time annealing at 650℃.关键词：17-4PH Stainless Steel;EAF-VOD;ESR;Forging;φ350 mm Round Product4|0|0更新时间：2026-01-21
- 摘要：The φ5.0~22.0mm wire coils of 0.35C high strength cold heading steel SCM435 with short-time annealing were produced at Ma'anshan Iron and Steel by hot metal pretreating -50 t top and bottom combined blown converter melting-65 t LF refining -6 strand 140 mm×140 mm billet concasting -SMS high speed wire coil mill control rolling and cooling process. The oxygen content in cast billet was 18×10-⁶ by LF refining with Ar stiring, sealed and argon shielding casting and electromagnetic stirring. The average tensile strength of wire produced by control rolling and cooling process was 746.5 MPa which lower 200 MPa than that by normal rolling process,therefore the annealing time of wire coil produced by control rolling and cooling process decreased by 50% than that by normal rolling process.关键词：Cold Heading Steel SCM435;Wire Coil;Control Rolling and Cooling;Shortened Annealing Time2|0|0更新时间：2026-01-21
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