最新刊期
卷 33 ， 期 3 ， 2012
- 摘要：Taking the 90 ~ 105 t hot metal ladle at steel works as prototype, a geometric similarity ratio 1： 4 water model is established in laboratory and the effect of hot metal ladle side-blowing gas for auxiliary-deslagging on skimming area is studied by physical simulation method. Results show that as blowing gas rate is 0.25 〜2.0 m3/h, with increasing gas blowing rate the deslagging area increases ； and with increasing installed angle of porous brick from 0° to 70° and installed height from 174 mm to 294 mm, the deslagging area all increases. With using single porous brick side-blowing to deslag, installed angle 70°, installed height 294 mm and gas blowing rate 0. 8 ~ 1.2 m3/h, the deslagging effect is best.关键词：铁水罐;透气砖;驱渣;水模型2|0|0更新时间：2026-01-21
- 摘要：In order to study the effect of tension on profile shape of single pass rolling strip of 304 austenite stainless steel (/% : 0. 053C, 0. 55Si, 1.50Mn, 0. 030P, 0. 002S, 17.02Cr, 8. OlNi, 0. 50Cu, 0. 08Mo) , based on explicit dynamic finite element method, the simulation and analysis on cold rolling process of 2 mm steel strip with four high mill have been carried out by ANSYS/LS-DYNA software. Results show that with reduction 0. 06 mm, forward tension 13 ~ 40 MPa and backward tension 1 ~ 18 MPa rolling process, the edge of rolled strip is acted under compressive stress and the middle part is acted under tensile stress led to produce tiny edge wave； with increasing forward tension from 15 MPa to 21 MPa； the strain of strip along width direction trends towards uniform, i. e. increasing forward tension is available to improve the flatness of strip, and increasing backward tension is also available to improve the profile shape of strip and its effect is more obvious that increasing forward tension.关键词：奥氏体不锈钢;薄板;冷轧;张力;有限元法;板形2|0|0更新时间：2026-01-21
- 摘要：The key step to cause the granulation of gas quenching molten slag is the granulated liquid slag droplet quick cooling and solidifying, and during slag droplet cooling process the main manners of heat transfer are convection and radiation. Based on established mathematical model for slag droplet cooling process, the rule of effect of radiation on slag droplet cooling process is emphasized studied by 4th order Runge-Kutta method. Results show that the slag droplets cooling are undergoing three phases including liquid phase cooling and nucleating, release of latent heat, and solid phase cooling； as the heat transfer through radiation is ignored, it takes 606 ms for temperature of slag droplet (/% : 29. 94FeO, 2. 05 Fe2O342. 18CaO, 9. 33MgO, 15. 92SiO22. 09MnO, 1. 25 Al2O32. 24P2O5) in nitrogen at 293 K decreasing from 1 723 K to 1 073 K, as compared with that considering the cooling time simultaneously by convection and radiation, it increases by 17. 2%. The results indicate that in calculating cooling rate of slag droplet the heat transfer through radiation can not be ignored.关键词：辐射;对流;气淬;渣滴;Runge-Kutta法;数值求解2|0|0更新时间：2026-01-21
- 摘要：The numerical-simulation on blooming and rolling process with 5 passes of BD2 mill at 1 200 °C for heavy rail steel U75V (/% : 0. 70 〜0. 78C, 0.50 〜0. 70Si, 0. 75 ~1.05Mn, ≤0.025P, 0. 008 〜0. 025S, 0. 04 〜0. 08V) has been carried out by using nonlinear finite element software ANSYS/LS-DY, and the distribution of equivalent stress and equivalent strain at stable-section of rolling piece in each pass is analyzed. Results show that with change of each pass the distribution of stress and strain in head, waist and bottom of rolling piece is deferent ； it is obtained by analysis on rail head, waist and bottom at stable-section of rolling piece that the change of stress in head is largest, its maximum value is up to 64. 8 MPa, so increasing the yield strength of head of heavy rail is available to prolong the life of heavy rail.关键词：重轨钢;BD2;有限元;等效应力;等效应变;数值模拟2|0|0更新时间：2026-01-21
- 摘要：The effect of ingredient of LF refining slag series (/% : 28. 75 ~ 58. 05CaO, 12. 50 〜32. 43A12O3, 0 ~ 15BaO, 8 ~ 20SiO2, 6MgO, 10CaFz) on desulphurization of high carbon chromium bearing steel GCrl5 (/% : 0. 99C, 1. 45Cr, 0. 034S) has been studied by Mo wire high temperature electric resistance furnace and using orthogonal test method. Results shown that as (CaO)/(Al2O3) = 2. 5 and (SiO2)=14% , with increasing ( BaO) from 0 to 8% , the desulphurization rate of liquid by refining slag increases, while with increasing ( BaO) from 8% to 15% the desulphurization rate decreases； as ( BaO) = 7. 5% and SiO2 = 14% , with increasing (CaO)/Al2O3the desulphurization rate by refining slag increases； and as ( BaO) = 7. 5% and ( CaO)/( Al2O3) =2. 5 , with increasing ( SiO2) , the desulphurization rate by refining slag decreases. The ingredient of LF refining slag with optimum desulphurization rate of liquid is 6% ~ 10% (BaO) , 3.5 -4. 0(CaO)/(Al2O3) and 8% - 12%SiO2.关键词：GCrl5轴承钢;LF;精炼渣;BaO;脱硫2|0|0更新时间：2026-01-21
- 摘要：The flow field of in a 40 t tundish with different flow control devices for eight-strand continuous casting has been simulated by test of water model with 1-3.5 geometric similarity scale. Results show that the average stagnation time of original tundish is short and the difference of residence time between four outlets at one side of tundish is large ； as compared original tundish the dead area volume fraction of tundish with optimum weir and double diversion holes and with optimum C12W1 rectangle weir respectively decreases by 19. 15% and 31. 49% , and the difference value of stagnation time between four outlets at one side also decreases ； the installed turbulence modifier can increase stagnation time and peak time of molten steel, but not effectively reduce the dead area volume fraction.关键词：八流中间包;水模型;挡墙;湍流控制器;优化设计2|0|0更新时间：2026-01-21
- 摘要：The API 13Cr for oil tube and case has good corrosion resistance in CO2but with new oilfield development ,it requires the steel for oil tube and case has excellent corrosion resistance in H2S and CO2at elevated temperature. The development status of non-API 13Cr martensitic stainless steels for oil tube and case including Cr13-Ni5-Mo, Cr13- Ni5-Mo2, and Cr15-Ni6-Mo2-Cu at home and abroad are analyzed in this paper and the chemical composition, mechanical properties and corrosion resistance of steels for oil tube and case produced at relative steelworks are presented.关键词：非API油套管;马氏体不锈钢;耐蚀性3|0|0更新时间：2026-01-21
- 摘要：Based on production data of 30 t VOD process refining stainless steels at Second Steelmaking Plant, FuSteel, the effect of C (0. 50% ~0. 93% ) and Si (0. 18% ~0. 42% ) content in liquid for VOD refining on splashing and temperature of steel in oxygen blowing process has been analyzed. Results prove that the high C and Si content (65% C, ≥ 0. 22% Si) are main factors led to splashing accident in initial period of oxygen blowing, while the low C and Si content in liquid lead to insufficiency of increased temperature of liquid and influence on quality of liquid and efficiency of later refining. The steelmaking practice shows that in order to avoid splashing accident the liquid with [C] ≥0. 90% and [ Si] ≥0. 40% is not available to refine by VOD process, and before VOD oxygen blowing the C and Si content in liquid are respectively within 0. 40% ~ 0. 65% and 0. 12% ~ 0. 20% , it is able to meet the requirement of VOD refining stainless steels.关键词：VOD Refining;Stainless Steels;C and Si Content;Splashing;Liquid Temperature7|0|0更新时间：2026-01-21
- 摘要：Developed Nb-Ti microalloying high strength steel (/% : 0. 04C, 0. 34Si, 1.40Mn, 0. 010P, 0. 004S, 0. 098Nb, 0. 020Ti, 0. 045Al, 0.002 5N) is melted by a vacuum induction furnace with casting 50kg ingot, forged to 40 mm plate, and rolled at 1 200 T to 10 mm plate by lab single strand mill with 7 pass, finishing pass reduction ratio ≥ 15% , finishing temperature 880 °C , splashing water cooling to 600 °C , and in furnace at 600 T for 30 min, furnace cooling to ambient temperature to simulate the laminar flow cooling and coil process. With test by Gleeble 3500 thermal simulation machine, the low plasticity zones of steel at high temperature are 650 〜800 °C and ≥ 1 300 ℃ . Mechanical properties examination results are lower yield strength Rel625 ~640 MPa, tensile strength Rm705 〜710 MPa, and elongation 18. 0% 〜 19. 5% . The developed steel has the characteristics such as low carbon equivalent, nice weldability, and low cost.关键词：600 MPa High Strength Steel;Nb-Ti Microalloying;Development2|0|0更新时间：2026-01-21
- 摘要：According to the analysis on stranding breaking rate of steel LX72A tire cord produced by 70 t LD converter flow sheet and 180t bottom blowing converter flow sheet, it is obtained that at the condition with same center segregation rating, as ratio of brittleness inclusions in steel decreases from 90. 7% to 20. 5% , i. e. ratio of plasticity inclusions in steel increases from 9. 3% to 79. 5% , the average breaking rate of tire cord decreases from 4. 20 times/1 to 2. 56 times/1. By using LF refining slag no-contained MgO with basicity 1.05, controlling Als content in steel ≤0. 001% and oxygen content ≤22 x 10-6,it is available to decrease the brittleness inclusions content in steel and decrease breakage ratio of tire cord.关键词：Steel Tire Cord;CaO-MgO-SiO2-Al2O3 Series;Deformability of Inclusions;Breakage Ratio4|0|0更新时间：2026-01-21
- 摘要：A great deal of saturated steam produced during converter melting is not often effectively used at steelworks ,while on the other hand the VD refining unit needs definite slight superheated steam. The results of converter steam supply to VD refining show that the saturated steam of heat reservoir of two sets of 100 t converter completely satisfies the requirement of VD refining with, steam pressure 0. 8 〜1.0 MPa and superheat extent 10 - 15 ℃.After VD refining of liquid for 15 min, the [ H] is ≤1.5 X 10-6total [ O] ≤15 x 10-6and de-nitrogen rate of liquid ≥25% . The key problems and solution schemes for application of converter saturated steam to 100 t VD refining unit are presented in this article.关键词：Saturated Steam of Converter;Superheated Steam;VD Refining Unit;Application2|0|0更新时间：2026-01-21
- 摘要：The effect of Ti content in steel lCrl8Ni9Ti electrode- [Ti] (0. 586% ~0. 839% ) , TiO2content in slag- (TiO2) (2. 1% ~4. 8% ) and packed ratio (0. 2 ~0. 4) (area of electrode / area of mold) on average melting loss of [Ti] during 1. 2 t ESR process is counted and analyzed. It is obtained that during electroslag remelting (ESR) process the melting loss of [Ti] at lower part of ESR ingot is larger than that at upper part； with increasing [ Ti] in electrode, the average melting loss of [Ti] decreases； and with increasing TiO2content in slag- (TiO2) , the p value of average melting loss of [Ti] at lower part of ESR ingot increases, while the β value of that at upper part of ESR ingot has not obvious change, the (TiO2) larger than 2% is not available； and increasing packed ratio is available to inhibit melting loss of [Ti].关键词：1Cr18Ni9Ti不锈钢;1.2 t锭电渣重熔;[Ti]烧损;工艺实践2|0|0更新时间：2026-01-21
- 摘要：The effect of grain refining process with 4 times 860 Y 15 min water cooling recycling treatment on mechanical properties of maraging stainless steel 00Crl3Ni7Co5Mo4Ti (/% ： 0. 009C, 13. 28Cr, 7. 37Ni, 5. 36Co, 3. 59Mo, 0. 66Ti) has been studied. Based on the original structure of steel with 1 100 ℃ 1 h solid solution treatment, after 3 ~4 times recycling phase transformation treatment, the grain size of maraging steel refines to 10 μm equiaxed fine grains from original 180 μm. Compared with traditional 1 100 ℃ 1 h solid solution +450 ℃ 9 h aging process, with 1 100℃1 h solid solution +860 °C 15 min water cooling α′↔γ phase transformation +450 ℃ 9 h aging, the yield σ0.2of steel increases to 1 560 MPa from 1 420 MPa and the elongation δ increases to 14. 9% from 12. 6%.关键词：马氏体时效不锈钢;00Cr13Ni7Co5Mo4Ti;循环相变;晶粒细化;力学性能2|0|0更新时间：2026-01-21
- 摘要：The continuous cooling transformation ( CCT) curves with cooling rate 0. 03 ~ 15. 60 T/s of Steel 30CrMo (/% : 0. 32C, 0. 20Si, 0. 60Mn, 0. 20Ni, 0. 97Cr, 0. 18Mo) 6 mm plate continuous-rolled by 56 mm thin slab are measured by using dilatation method and the microstructure of steel with different cooling rate is observed to get the phase transformation point of steel 30CrMo- Ac3 = 800 ℃ , Act =735 °C , Bs =510 ℃, Ms = 340 °C and Mf = 220 ℃. Application results show that the cooling rate of 6 mm plate after coiling is ≤0. 06 ℃ , as coiling temperature is 610 ~640 ℃，the structure of steel 30CrMo is ferrite + pearlite, it is available to avoid forming bainite structure that leads to obvious increase of strength of steel and deterioration of plasticity of steel.关键词：Steel 30CrMo;Thin Slab Casting and Rolling;CCT Curves;Coiling Temperature2|0|0更新时间：2026-01-21
- 摘要：The cutting characteristics of common gear steel 20CrMnTiH (0. 006% S) and sulphur bearing gear steel 20CrMnTi (0. 031 % S) with different cutting speed (200 ~230 m/min) and cutting depth (0. 5 ~2 mm) have been tested and researched. Results show that with increasing cutting rate, the wear of tool increases, with cutting speed 200 m/min the service life of 0. 031% S steel is 2. 8 fold as long as that of 0. 006% S steel and with cutting speed 230 m/min the service life of 0. 031 % S steel is 2. 6 fold as long as that of 0. 006% S steel ； with increasing cutting depth the cutting force increases ,but with definite cutting depth the cutting force of 0. 031 % S steel is lower than that of common 0. 006% S steel ； As there are ≤6 μm MnS inclusions in 0. 031 % S steel, the chips are easily broken, and the manganese sulphide is able to clad Al2O3spinel inclusions led to decrease of tool wear and increase of cutting characteristics of steel products.关键词：硫;20CrMnTiH齿轮钢;切削性能2|0|0更新时间：2026-01-21
- 摘要：The manual arc welding and CO2shielding gas arc welding of 3. 8 mm DP590 steel sheet (/% ： 0. 07C, 0. 45Si, 1.61Mn) are carried out respectively by Φ3 mm E4303 carbon steel welding rod (/% : ≤0. 12C, ≤0. 25Si, 0. 30 〜0. 60Mn) and Φ 1 mm H10MnSi welding wire (/% : 0. 14C, 0. 65 ~0. 95Si, 0. 80 ~ 1. 10Mn) with different welding parameters, and the structure and microhardness of welding zone are observed and analyzed by ZEISS optical microscope and LEICA microhardness meter. Results show that in welding metal zone the structure of steel by manual welding is proeutectoid ferrite and pearlite distributed along columnar crystal and that by CO2shielding gas welding is acicular ferrite and minor bainite； in coarse grain region the structure of steel by manual welding is bainite and proeutectoid ferrite, and that by CO2shielding gas welding is lath martensite and bainite, of which the grain size is larger than that by manual welding ；with CO2shielding gas welding as using larger heat input the Widmannstatten structure in welding metal and coarse grain region is eliminated; the maximum of microhardness is occurred at coarse grain region and the width of heat affected zone of welding steel by manual arc welding is less than that by CO2shielding gas welding.关键词：DP590钢板;手工电弧焊接;CO2气体保护焊接;焊接区;组织2|0|0更新时间：2026-01-21
- 摘要：The effect of 340 multi-stand pipe mill (MPM) continuous rolling process (at 950 ~ 1 100 °C with strain 0. 5 ~ 0. 8, strain rate 1. 0 s _ 1 , water or 3 °C/s cooling) and sizing process ( at 800 ~ 950 °C, with strain 0. 1 ~ 0. 3 , strain rate 0. 5 s-1air cooiing) on structure, and hardness of steel 36Mn2V and 40Mn2V has been simulated by using Gleeble-1500 thermal simulation machine. Results show that with MPM deformation temperature being higher than 1 050 °C at strain 0. 5 , the complete dynamic recrystallization of steel 36Mn2V and 40Mn2V occurs, the grains are fine and the comprehensive properties are improved； As sizing strain of steel 36Mn2V is 0. 3 and sizing strain of steel 40Mn2V is 0. 2, as the sizing temperature is controlled higher than 835 °C , the mechanical properties can meet requirement of standard.关键词：36Mn2V;40Mn2V;Non-Quenching and Tempering Steel for Oil Well Pipe;Thermal Simulation;Continuous Rolling;Sizing;Structure;Property2|0|0更新时间：2026-01-21
- 摘要：The effect of finishing temperature (800 ~850 °C ) and cooling rate (2 〜20 ℃/s) on structure and mechanical properties of microalloying steel Q55OD plate (/% ： 0. 06C, 0. 20Si, I. 60Mn, 0. 010P, 0. 001S, 0. 10Mo, 0. 06Nb, 0. 01V, 0. 02Ti) has been studied by using thermo-mechanical simulator Gleeble-3800. Results show that with decreasing finishing temperature and increasing cooling rate after rolling, the granular bainite in steel gradually decreases, and the lath bainite gradually increases, as a results the yield and tensile strength of steel increasing trend is obvious and the - 20 ℃ toughness is improved but the elongation of steel is decreasing trend ； with finishing temperature 850 °C and cooling rate 15 - 20 ℃/s the steel Q550D has better strength-toughness comprehensive properties, i. e. tensile strength is about 750 MPa, yield strength 650 MPa, elongation 39% and -20 ℃ impact energy 65 J.关键词：Microalloying Steel Q55OD;Thermal Simulation;Finishing Temperature;Cooling Rate;Structure;Mechanical Properties2|0|0更新时间：2026-01-21
- 摘要：An analysis on longitudinal crack of 200 mm x 1 300 mm casting slab of UNS NO881O alloy (/% : 0. 06C, 0. 45Si, 0. 92Mn, 0. 016P, 0. 001S, 30. 15Ni, 19. 80Cr, 47. 81 Fe, 0. 33Ti, 0. 23Al, 0. 014 0N) produced by one-strand vertical continuous casting machine has been earned out by optical, scanning electron microscope, energy dispersive spectrometer and Gleeble-3800 thermal simulation machine. Results show that the longitudinal crack extends along grain boundary of coarse columnar crystal towards inner casting slab, the depth of crack is 18 ~ 20 mm. Test of high temperature plasticity of alloy obtains that as temperature ≥1100 °C the reduction of area of alloy dramatically decreases. And the analysis indicates that at early period of solidification the connection between columnar dendrites is weak, the boundary of columnar crystal easily cracks, in addition the brittle phase TiC deposits at grain boundary lead to stress concentration, the crack easily extends along grain boundary to form the longitudinal crack finally.关键词：N08810耐蚀合金;连铸板坯;纵向裂纹;形成机理;分析2|0|0更新时间：2026-01-21
- 摘要：Owing to less rolling passes and non-control cooling rate device after finishing rolling, the two kinds of structure-pearlite + ferrite and bainite + martensite in Φ70 ~ 80 mm round bar of steel 40CrMo (/% : 0. 40 ~0. 41C, 0. 97 〜1.05Cr, 0. 17Mo) produced by continuous rolling mill strain easily occur. By using Gleeble-2000 thermal simulation machine the continuous cooling transformation (CCT) curves of two kinds of original structure specimens of heat batch Nol and No2 are measured, and the structure and micro-region analysis of finished products by heating at 1 150 ℃ for 5 min then cooling with 10 °C/s to 900 丁 for 10 s and deforming 30% with strain rate 20 s-1and cooling with 0. 2 ~ 10 ℃/s to 200 °C are studied. Results show that the martensite structure occurs as the finished products is cooling with large cooling rate after rolling ； with cooling speed 0. 1 ~ 1 ℃ /s for round bar after rolling the steel 40CrMo can get normal structure i. e. bainite and/or pearlite structure.关键词：Steel 40CrMo;Round Bar;Hot Rolling;Cooling Rate;Structure2|0|0更新时间：2026-01-21
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