最新刊期
卷 29 ， 期 4 ， 2008
- 摘要：The physical and chemical properties, and structure of crystallizing phases of two kinds of flux • 56 ~ 58 melilite, 25 -27 grammite, 4 ~5 lance spar, 10 - 12 glass phase and 20 -22 melilite, 78 ~80 glass phase, and ingredient, melting temperature and thickness of liquid slag layer used for 180 - 200 mm slab casting at Tangshan stainless steel mill have been tested and studied. Results showed that as casting speed >1.5 m/min, in order to make the flux maintains " whole course liquid lubrication" in mold, the melting temperature of flux should be W1 049 乜 with controlling melting speed (34 ±2) s； and the optimum thickness of liquid slag layer is 10 ~ 15 mm with slag viscosity 0. 19 Pa • s.2|0|0更新时间：2026-01-21
- 摘要：The simulation on temperature and rolling force of 68 mm slab of 0. 19-0. 20C steel during 6 passes rolling of compact strip production (CSP) process has been carried out by commercial software Marc with heavy deformed elasticplastic thermal-mechanical coupled finite element method to analyze distribution and change of temperature and rolling force of workpiece at each pass in rolling process. Results show that during deformation of workpiece, contact heat conduction and deforming heat are main factors to influence temperature change, and both combined effects determine the law of temperature change of work piece during deformation process ； there is an obvious temperature gradient from surface to centre with certain depth of workpiece, and beyond the critical depth, the temperature of workpiece maintains constant ； and the rolling force keeps little variation during stable rolling stage.2|0|0更新时间：2026-01-21
- 摘要：The deformation induced ferrite structure of Q235 steel was got with heating at 950 °C for 5 min,1°C/s cooling to 855 ℃ for 30 s and reduced 80% at strain rate 15 s-1then quenching by Gleeble 1500 thermal simulation machine, and the pro-eutectoid ferrite structure of the steel was got by heating at 950 °C for 5 min, furnace cooling. Test results showed that the grain size of deformation induced ferrite was ≤5um average HV value 229. 55, tensile strength 809 MPa, while the grain size of pro-eutectoid ferrite was 10 - 20 μm grain un-uniform, average HV value 210. 28, tensile strength 736 MPa. The mechanism of thermodynamics and kinetics of the deformation induced ferrite and pro-eutectoid ferrite are analyzed in this paper.2|0|0更新时间：2026-01-21
- 摘要：The effect of CaO-Al2O3-SiO2slag ingredient on T[O] in 0. 42C-1.15Cr-0. 2Mo steel and sulphur partition ratio Ls- (S)/[S] at 1 873 K has been studied by experiment of MgO crucible in Si-Mo high temperature furnace. It was found that with increasing slag basicity- ( CaO + MgO)/SiO2 from 1 to 3 , the T[O] dramatically decreased from 0.001 4% to 0. 001 0% , and with further increasing basicity, the change of T[O] was not obvious； as ( FeO + MnO) W0. 50% , the T[O] was WO. 001 0% and as (FeO + MnO) more than 0. 50% , the T[O] obviously increased to 0.001 4% ； the slag basicity, activity of Al2O3in slag and [ Al] had obvious influence on Ls, that was with increasing the activity of Al2O3 in slag, the Ls decreased and with increasing the slag basicity and [ Al] , the Ls increased.4|0|0更新时间：2026-01-21
- 摘要：The rules of equilibrium phases precipitation in typical nickel base alloy Inconel 690 (0. 015C, 29. 42Cr, 9. 10Fe, 0. 26Ti ,0. 16A1) melted by Its vacuum induction furnace + ESR process and the effect of alloy chemical composition on M23 C6 phase precipitation behavior has been studied by Thermo-Calc software. The structure of solid solution and sensitizing treated alloy Inconel 690 was tested and analyzed by SEM, TEM, SADP and EDS. Results showed that the main equilibrium precipitates in alloy Inconel 690 were M23C6 and); as solid solution temperature was 000 t, the M23 C6 dissolved completely. Calculated results indicated that the effect of carbon content in alloy on precipitation amount of M23 C6 was greater than that of other elements in alloy.关键词：Inconel 690镍基合金;热力学计算;析岀相;M23C62|0|0更新时间：2026-01-21
- 摘要：The hot deformation behavior and structure evolution of austenite-ferrite dual phase stainless steel 00Cr21Ni2Mn5N with strain rate 5 - 50 s-1reduction ratio 60% at 850 ~ 1 150 ℃ have been studied by using Gleeble- 3800 thermo-mechanical simulator etc. Results showed that with increasing temperature the flow stress of dual steel 00Ci21Ni2Mn5N decreased while with increasing strain rate the flow stress of steel increased; the mechanism of steel was related to Zener-Hollomon (Z) parameter； and the apparent stress exponent and apparent activation energy (Q) of the dual phase stainless steel 00Cr21 Ni2Mn5N were 4. 82 and 219 kj/mol respectively.关键词：双相不锈钢00Cr21Ni2Mn5N;高温变形;流变应力;表观激活能3|1|0更新时间：2026-01-21
- 摘要：Test alloy steels 27Mn-3Si-3Al and 15Mn-2Si-3Al were melted by vacuum induction furnace, cast tot to 16.5 kg ingot, heated to 1200 ℃ and forged to φ25 mm bar. The 27Mn-3Si-3Al alloy steel maintained single-phase austenite structure before and after strain of which the stress-strain curve was smooth without apparent yielding phenomenon and work hardening peak, the tensile strength of the steel solid-solution treated at 1000 C for 2 h was 692 MPa with elongation 59%.As the Mn content in the steel decreased to 15%,there was considerable martensite in structure, and strain led to large amount austenite in steel 15Mn-2Si-3Al transferring to α'-M phase, stress-strain curve producing obvious work hardening peak and elongation of steel decreasing to 35%.关键词：TWIP(相变诱发塑性)钢;孪晶;变形特性4|0|0更新时间：2026-01-21
- 摘要：In according with production conditions for 60 mm thin slab concasting with 150 t ladle and 28 t tundish, the effect of outlet area ratio(2.0~2.4),outlet angle(15°~35°),immersed depth(210～270 mm)and casting speed (4.0~5.0m/min)on liquid flow field has been studied by using 1:2 water model test in orthogonal design to measure liquid surface wave amplitude in mode and pouring impact depth. Results showed that the optimized structure of submerged entry nozzle with cross outlet, of which outlet area ratio was 2.4 and outlet angle was 25°, was available to meet the requirement of high-speed casting with immersed depth 240 mm.关键词：薄板坯连铸;十字出口形浸人式水口;结晶器;流场;水模型2|0|0更新时间：2026-01-21
- 摘要：The test of deoxidation and desulphurization of X120 pipeline steel-0.03~0.04C,1.98～2.05Mn,≤ 0.9(Cr+Mo+Nb+V+Ti)has been caried out by 150 kg and 50 kg vacuum induction furnace with magnesium oxide crucible. Results showed that with controlling carbon-oxygen reaction using carbon for deoxidiza tion and controlling melting temperature to avoid furnace lining decomposition, the oxygen content in steel was ≤20×10-6and with CgO-BaO-CaF2fining slag the sulphur content in steel was≤0.002%.It was found by scanning electron microscope that there was ≤5 μm MgO inclusions in steel which originated from crucible.2|0|0更新时间：2026-01-21
- 摘要：It is available to fine grain size of case-hardened steel for gear, increase cutting properties and fatigue property of steel by adding microalloying elements such as Al,Nb,Ti,N and B, while to shorten carburizing time, simplify procedures and decrease production cost by adding Nb,Ti etc.elements.The grade, chemical compositions, production process characteristics and research progress of microalloying cold forging steels for gear, case-hardening steels for gear carburizing at high temperature and high strength-toughness steels for gear are presented in this article.2|0|0更新时间：2026-01-21
- 摘要：Based on the statistics and analysis on tensile strength of HP295(0.13～0. 18C,0.80～1.00Mn,≥ 0.015Nb,≥0.010Ti)hot rolled steel strip for gas bottle by using multiple regression analysis method,the linear equation of tensile strength gu of HP295 steel strip with carbon equivalent.Cop=C+0.2426Mn-0.353Si,strip thickness h and coiling temperature CT:04=499. 1Cp- 17.72h-0.728CT+836.68.Examination results showed that relative eror between calculated and measured value of tensile strength of HP295 steel strip was ≤8.67% to meet the requirement for calculated precision.6|0|0更新时间：2026-01-21
- 摘要：Rolling test on steel plate(0.09C,0. 12Si,0.98Mn,0.010P,0.005S,0.010Nb,0.04Als)for wheel spoke with finishing rolling temperature 830～890 ℃ and coiling temperature 620～680 ℃ has been carried out by 1700mm hot rolling mill train. Results showed that with slab heating temperature 1230~1250 ℃,finishing rolling tem- perature 870±15℃,coiling temperature 660±15 ℃,the structure of steel plate for wheel spoke was fine ferrite + minor pearlite,the yield strength of steel was 335～380MPa,tensile strength 430～485MPa,elongation 26%~31%,the longitudinal strength difference of each steel coil was 13~37MPa,and the punching formability during vehicle wheel manufacturing was excellent with punching rejection rate less than 0.3%.2|0|0更新时间：2026-01-21
- 摘要：With the operation measures such as BOF using catch carbon practice,controlling[P]≤0.012% at tapping,end slag basicity2.8~3.5,double slag stopping operation,LF refining slag basicity ≥4,(TFe+MnO)≤1.0%, using low aluminium content refining technology and bearing barium cleanliness steel produced technology,RH-MFB vacuum treatment,complete protective casting and optimized secondary cooling technology,127 different special steel designations have been developed at Huai Steel, the total oxygen content in bearing steel was≤10×10-°,spring steel 60Si2CrVAT≤12×10-6,mooring chain steel CM490≤15×10-6,tube blank steel 37MnS for oil well≤18×10-6, cold heading steel SAE1022A and tube blank steel 15CrMoG for high pressure boiler ≤20×10-6.关键词： 特殊钢;BOF-LF-RH-CC流程, 含钡洁净钢2|0|0更新时间：2026-01-21
- 摘要：Typical hollow forgings-electro-slag remelting (ESR)alloy steel roll sleeve with inner diameter 560～880 mm, outer diameter 670~1200 mm and length 1300～1780 mm is usually produced by ≥2 t ingots. Based on the ensuring product quality, as compared with traditional forging process, it is available to decrease by 2 procedures and once re- heating with using optimized process- direct forging upsetting. The forgings yield increased by 5%～15% to obviously de- crease production cost.关键词：空心类锻件, 电渣重熔, 合金钢,&锻造, 成材率2|0|0更新时间：2026-01-21
- 摘要：Nitriding steel 38CrMoAl (0.35～0.42C,0.20～0.45Si,0.30～0.60Mn,1.35～1.65Cr,0. 15~0.25Mo,0.70～1. 10Al) was produced by 100tEBT DC arc furnace- 100tLF-200 mm×200 mm,150 mm×150 mm billet concasting machine flow sheet. With using the technology measures such as adding 60% Al at steel tapping,adding 40% Al in LF refining,refining by high basicity slag and argon blowing,feeding φ16 mm 28Ca-55Si wire at end phase of refining,enlarging inside diameter of immerged nozzle for tundish,and whole course shield casting practice,the steel 38CrMoAl was successfully produced with concasting 5 heats,the total oxygen content in rolled products was(5～8)x 10-6and each property all met the requirement of customer.关键词：渗氮钢38CrMoAl;100tEBT EAF-LF-CC; 工艺实践2|0|0更新时间：2026-01-21
- 摘要：The steel T27(0. 10~0. 16C,0. 15~0.25Cr,0.025～0.045Al)for railway belongs in peritectic steels which was produced by 45%～60% hot metal + scrap-50tEAF-LF(VD)-caster flow sheet at special steel plant,Lai Steel. With EAF charging hot metal≥45%,adjusting oxygen supply,ensuring end carbon 0.08%～0. 10%,partly re- placing silicomanganese by steel cored aluminium for refining during EAF tapping,controlling refining basicity 4 and argon blown parameters,controlling overheating 20~30 ℃ of steel in tundish,mold water rate 180 m³/h and viscosity of shield slag0.85±0.05 Pa · s,the oxygen content in steel was lower to(15～20)×10-6the qualified rate of cast billet ≥ 99.95%,and the quality of steel products met the requirements of standard GB/T700- 1988.关键词：EAF-LF(VD)-CC,& 终点碳控制,&T27钢,&包晶, 保护渣4|0|0更新时间：2026-01-21
- 摘要：The influence factors on Ti yield ratio, the effect of Ti content on Ti inclusion content in steel and austenite grain growth tendency and the effect of C - Ti on hardenability and mechanical properties of gear steel 20CrMnTi have been studied. Results showed that with Ti content more than 0. 03% , the amount of Ti inclusion in steel increased obviously, with increasing Ti content from 0. 01% to 0. 04% , the austenite grain rating at 980 ℃ fbr Ih increased from 5 to 8, and with controlling C-Ti = 0. 12% , the width of hardenability band of steel was HRC 4-6.2|0|0更新时间：2026-01-21
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Technology of Control of Oxygen Content and Sulfide Morphology in High Sulfur Free Cutting Steel Y15
摘要：Free cutting steel Y15 (0. 10~0. 15C,1.00～1.20Mn,0.30S) is produced by 25t EAF-LF-657 kg ingot flow sheet at Xinin Special Steel. Test results indicated that with controlling arc furnace oxidizing end [C] 0.06%~ 0. 10% and in deoxidation process to control [0] (150~250) ×10-6Mn/S=2.77 and 0/S=0.059 in steel, most inclusions in steel were (Mn,Fe)S and sulfide wrapped up oxide, and a small number of inclusions was MnS to enable the steel having excellent cutting property.6|0|0更新时间：2026-01-21 - 摘要：With optimized process measures such as decreasing mold cooling intensity, improving water distribution of mold board and narrow face, prolonging the length of secondary cooling zones, properly increasing casting specific water flow rate and adjusting of water flow proportion of each secondary cooling zone,the quality of 360 mmx450 mm casting bloom of high strength weathering steel YQ450NQR1 obviously improved,the ratio of surface depression defect decreased from 37. 13% to2.87%,the ratio of center porosity rating ≤1.0 increased from79.71% to90.70%,the ratio of center segregation rating ≤0.5 increased from 1.45% to 44. 19%,and the ratio of center crack free increased from 39. 13% to 62.79%.关键词：耐候钢;大方坯连铸结晶器冷却;二冷控制;质量控制2|0|0更新时间：2026-01-21
- 摘要：The effect of 0.52～1.00 Ni on corrosion fatigue properties of 2.000 MPa grade medium carbon spring steel NHS ( 0.44~0.45C,1.95~2.08Si,0.68~0.70Mn,0.90~0.92Cr,0. 14~0. 15V) has been studied by using accelerated corrosion(5% NaCl salt spray)test and rotating bending fatigue test. Results indicated that with increasing the Ni content in steel NHS,the depth of corrosion pits in steel decreased and the corrosion pitting potential of steel in 5% NaCl aqueous solution increased as a result to increase the corrosion fatigue strength and life of the steel. As compared with conventional spring steel 60Si2CrVA,the spring steel NHS presented better anti-corrosion fatigue properties.关键词：Ni;中碳高强度弹簧钢;腐蚀疲劳5|0|0更新时间：2026-01-21
- 摘要：The precipitated phase particles in ferrite-martensite dual phase steel(0.08C,0.22Si,1.02Mn, 0.02Nb,0.013Ti,0.034Al)rolled by φ450 mill with control rolling and cooling process in laboratory has been studied by using carbon extraction-replica technique.Results showed that there was(Nb,Ti)(CN)precipitates with size being doz- ens nm at 1200 ℃; with energy dispersive X-ray spectrometer analysis,the Nb content in smaller particles was higher than Ti content of which the shape was irregular,and in large particle of which the shape was rectangle,main content was Ti with minor Nb; and in steel by control rolling and cooling,the(Nb,Ti)(CN)was interstitial precipitated phase and mainly precipitated at grain-boundary.关键词：双相钢, 铁素体-马氏体,&沉淀相粒子, 萃取复型4|0|0更新时间：2026-01-21
- 摘要：Based on analyzed and calculated finite content and pearlite lamellar spacing in (0. 56 *0. 63C, 0. 60 ~ 0. 71Mn, 0. 23 〜0. 28Si) high carbon steel by optical and scanning electron microscope using quantimet technique, the mathematical model for relationship between structure and yield strength of high carbon steel wire has been established that is yield strengthσa.( Pa) = 104. 52 x 10-6+ 161. 70 (1 - fa1/3)S-1(m), where/,- volume fraction of ferrite, S・ pearlite lamellar spacing. The relative error of the calculated value by model with examined value is 2. 9%.2|0|0更新时间：2026-01-21
- 摘要：The structure of welded junction of 1Cr18Ni9Ti austenite stainless steel plate and 1Crl3 martensite stain- less steel plate welding by 1Cr18Ni9Ti electrode has been observed and analyzed by metallographic method; and the polarization curves and alternating current impedance curves were measured by immersion test of simulation seawater solution to contrast and analyze the corrosion resistance of weld seam and parent metals. Results showed that the structure of weld junction was typical columnar solidified structure; in welded junction, the martensite parent metal and weld seam region were easy to be corroded, while the austenite parent metal was not easy to be corroded.2|0|0更新时间：2026-01-21
- 摘要：The change of structure and element content in boronizing layer of steel 1.72C- 11.81Cr-0.40Mo has been analyzed and studied by using optical microscope,scanning electron microscopy and X-ray analyzer. Results showed that the boronizing layer consisted of white-bright boronizing zone(phase FeB-phase Fe₂B)and black alternating with white transition zone; there was a lot of irregular island B bearing carbides;and there were the elements such as B,C,Al,Si, Mo,Cr,Fe in boronizing layer,the B,Cr and Fe content at front of boride in boronizing layer was 11.48%,36.49% and 32.23% respectively while the B,Cr and Fe content in transition zone was8.07%,7.04% and77.21% respectively, but the Mo content was almost no change.The Cr and Mo existed in boronizing layer by carbides form,and Al and Si existed at defect or high carbon area in boronizing layer.2|0|0更新时间：2026-01-21
- 摘要：The dissipation of energy-dissipation of heat during fatigue process of materials has been analyzed, and the surface temperature change of 0. 45C steel with necking part in fatigue test process by using high frequency fatigue test machine was studied by infrared thermal sensor to fast determine fatigue limit of 0. 45C steel. Results showed that the fatigue limit of normalized 0. 45C steel determined by infrared thermal sensor was 219 MPa, it was showing no difference with the fatigue limit of steel obtained by theoretical calculation. This method has the merits such as non-contact, convenience and low-cost.关键词：红外热像仪;能量耗散;0.45C钢;疲劳极限2|0|0更新时间：2026-01-21
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