最新刊期
卷 39 ， 期 6 ， 2018
- 摘要：Anshan Iron and Steel Company 180 t top-bottom combined blowing converter is considered as prototype in this article, the hydraulic model tests of traditional jet and coherent jet to bath were carried on by designing supersonic jet oxygen lance . The best mixed time was 12.6 s which was obtained by traditional jet water model experiment. Hie interaction between coherent jet and bath was simulated by reducing oxygen lance position, which was carried under the condition of keeping the best top blown gas flow rate is constant. The results shown that: the mixing time was 11.8 s when the lance position was reduced to 40 mm. This showed that the coherent jet flow oxygen lance may achieve the result of top-bottom converter stirring effect. In that case, the bottom blowing system of converter could be canceled, the converter equipment can be simplified, and the converter lining life can be improved.2|0|0更新时间：2026-01-21
- 摘要：The effect of consumable electrode on ESR ingot cleanliness was investigated during electroslag remelting (ESR) of G20CrNi2Mo bearing steel. The results show that the ingot cleanliness is much correlated with that of electrode. The ingot oxygen content presents a rising trend with increasing electrode oxygen content. The SEM-EDS analysis reveals that the number density of low-melting-point CaO-MgO-Al2O3inclusions in high oxygen-containing electrode is much larger than that in low oxygen-containing electrode. The low interfacial energy between low-melting-point inclusions and steel significantly limits the efficiency of inclusions removal, thus resulting in relatively high ingot oxygen content. With increasing carbon content before EAF tapping, the number of ingots less than 0.002 0% oxygen occupies total more than 90%.2|0|0更新时间：2026-01-21
- 摘要：For the three-flow asymmetric tundish, ANSYS Fluent software was used to simulate its flow control scheme. The flow field, temperature distribution and residence time distribution (RTD) characteristics of molten steel under different scenarios were compared. The simulation results show that there are obvious short-circuit currents in the original scheme, and the consistency of molten steel flow at each nozzle is poor. The actual residence time of the three nozzles is 459. 44 s, 519. 43 s, and 636. 94 s respectively, and the maximum temperature difference is 7 K. The proportion is 23. 9% ; the optimal optimization scheme reduces the short-circuit flow and improves the consistency of the molten steel flow. The actual residence time of the three nozzles is 517. 13 s, 532.66 s, and 502. 12 s respectively, the dead zone ratio is reduced to 19.8% , and the maximum temperature difference is reduced to 2. 5 K, the flow consistency is good and the flow of molten steel is more reasonable. In the industrial test, the content of T[0] in the tundish was reduced from 49 x 10-6to 40 x 10-6and the decrease was 18.4%. The casting billet T[0] was reduced from 34 x 10-6to 28 x 10-6and the decrease was 17. 7%, The purity of the inclusions in the tundish was reduced from 7. 2/mm2to 4.7/mm2and the cast billet decreased from 5.4/mm2to 3. 5/mm2and the number of inclusions decreased.2|0|0更新时间：2026-01-21
- 摘要：The melting behavior of single manganese ore pellet containing carbon in converter Quarternary slag (51 CaO-16SiO2-10MgO-23FeO) was investigated by experiments and mathematical model. The results showed that the sol¬id product layer was generated in the reduction process of manganese ore pellet containing carbon, and the rate of reduction can be accelerated by reduce the thickness and existing period of the solid product layer. Then the numerical model of melting process was established based on one-dimensional unsteady heat conduction differential equation, and the result of calculation was coinciding with the experimental data, thus illuminated that the model is effective. Simulated calculation to different conditions and the results showed that, reduction time of pellet can be shorten by about 35% to assume that the solid product layer not exist in reduction process when the temperature of the slag was 1 600 X.. Preheated pellet, reduce the pellet diameter and lower melting point of reduction product can reduce exist time of solid product layer, and improve the pellet reduction rate.关键词：渣浴还原;含碳球团;熔化行为2|0|0更新时间：2026-01-21
- 摘要：The production process of Φ 14 mm products of steel HRB400 (/% : 0. 21 ~0. 25C, 0. 35 ~0. 60Si, 1.30 - 1.55Mn, 0.045P, 0.045S) is 100 t BOF-argon blowing-150 mm x 150 mm billet casting-rolling. In order to resolve the cold-bending cracking phenomenon by increasing yield strength of steel HRB400 besides higher C and Mn content in steel, the commercial pilot production by adding titanium nitride for Ti microalloying and optimizing control rolling-cooling process is carried out. Results show that with decreasing Mn and Si content (/% ) in steel respectively by 0. 35 and 0. 1, and adding 0. 007% Ti in steel (test No2) , or controlling steel reinforced bar going to cold bed temperature at 670 ~ 690 °C (test No2 ) , the yield strength of finished reinforced bar is up to 460 MPa the test aim value ； as using Ti microalloying and optimizing cooling process (/% : 0. 22C, 0. 34Si, 1. OOMn, 0. 007Ti and going to cold bed temperature at 670 ~ 710 °C , test No3) the average yield strength Relof test steel is up to 485 MPa, while as using original process (/% : 0. 22C, 0. 43Si, 1. 37Mn and going to cold bed temperature at 690 ~ 730 X.) the average yield strength Relis only 435 MPa.2|0|0更新时间：2026-01-21
- 摘要：The effect factors on intensity of cooling of large-scale ESR furnace mold have been analyzed by using heat transfer theory, it is obtained by calculation that the optimum water flow rate for the 1 800 mm diameter mold is 1. 2 m/s, and the optimum design scheme for high speed water case type mold with case layer thickness 10 mm is put forward. The production results by remelting 60 t 0.030C-17.10Cr-ll.80Ni-2.55Mo-0.072N austenite stainless steel ESR ingot with voltage 77. 5 V, current 19 kA, remelting speed 31. 6 kg/min and water rate 1. 2 m/s show that the formability of ESR ingot is better, and the forming quality of ESR ingot is improved with smooth ingot surface and uniform distribution of slag skim.2|0|0更新时间：2026-01-21
- 摘要：To solve the problem of low carbon content at the endpoint, high TFe and heavy smoke during dredging, new steelmaking process is put forward which by adding the silicon to semi-steel to thermal compensation. By researching and optimizing the process parameters, the new steelmaking process was industrial applied. Application effect indicated that the new process could reduce the carbon burning and temperature drop during charging semi-steel, and the heat and quality of semi-steel was improved, the proportion of carbon content at the endpoint of rail steel between 0. 07% 〜0. 12% was increased sharply from 32. 2% to 92. 38% , TFe in slag of rail steel reduced from 19. 9% to 18. 62% , while carbon-steel reduced from 20. 85% to 18. 89%. In addition, the new process greatly reduced the problem of heavy smoking during vanadium slag picking up process, which has obviously benefit of environmental protection.2|0|0更新时间：2026-01-21
- 摘要：In order to reduce the cost of smelting for 0Crl3C stainless steel which produced by one-step process (dephosphorization station + 60 t AOD +60 t LF) ,Xingtai Iron and Steel Co. Had replaced the single-slag to double-slag operation in the AOD furnace ( argon oxygen decarburization furnace) to reduce the decarbonization amount of lime. And through adding a extra lime operation after first reduction to ensure the quality of final slag steel. The results indicated that after AOD furnace from single-slag to the double slag operation, not only the influence of subsequent slag basicity change on the increasing carbon can be ignored for the low carbon 0Crl3C which with stringent carbon content is required, but also the early slag quantity decreases significantly. The using amount of Lime, fluorite and ferrosilicon respectively decreases by 1.003 ton to 1.387 ton, 0.332 ton to 0.411 ton and 0. 106 ton to 0. 177 ton for one furnace. The cost per ton of steel is reduced by 37.48 to 44.48 yuan.7|0|0更新时间：2026-01-21
- 摘要：The surface quality of the IF steel strips rolled without lubrication and with two different emulsions lubrication was analyzed, and the reasons for the difference of surface quality lubricated by different emulsions were studied by analyzing the tribological properties of emulsions. The results showed that the lubrication of emulsions in cold rolling process could make the steel strip surface more smooth and improve the surface quality. The reason for the better surface quality of the steel strip lubricated by LP-2 than lubricated by LP-1 is mainly that the LP-2 emulsion had higher oil film strength which could form more stable oil film in the lubrication process, and get better anti-friction and anti-wear effects.2|0|0更新时间：2026-01-21
- 摘要：It is found that a large amount of surface transverse cracks at Φ200 mm round bar forged from 2.5 t ESR ingot remelted from 20 t EAF-VOD-LF-VD-casting electrode. To observe the morphology of cracks by scanning electron microscope the analysis results show that overheating of ingot before forging leads to melting of grain boundary to form forging cracks. It is obtained by test and production practice that as steel 022Cr25Ni22Mo2N ingot heating temperature decreases from original 1 180 to 1 100 X. the forgings cracks are eliminated.4|0|0更新时间：2026-01-21
- 摘要：The superheating extent of liquid of 8620 gear steel (/% : 0. 18 〜0. 22C, 0. 17 ~ 0. 26Si, 0. 70 ~ 0.90Mn, ≤ 0.025P, 0.15 ~0.23S, 0.40 ~ 0.60Cr, 0.40 ~0.70Ni, 0.15 〜0.25Mo) for casting 300 mm x 360 mm bloom is 20 ~30 ℃ and the casting speed is 0. 5 ~0. 6 m/min, and by bloom drilling analysis, pin-shooting test, original position analysis and bloom macrostructure analysis the effect of electromagnetic stirring parameters [ M-EMS (100 - 200) A, (2.0 ~ 2.2) Hz, F-EMS ( 150 ~ 200) A, 8 Hz] and secondary cooling water parameters (Ⅰ- zone 28 L/min, Ⅱ - zone 38 ~45.6 L/min and Ⅲ- zone 19. 2 ~24 L/min) on C and S segregation in bloom has been studied. With using optimized process parameters- secondary cooling water Ⅰ- zone 28 L/min, Ⅱ - zone 45.6 L/min and Ⅲ- zone 19.2 L/min, and electromagnetic stirring M-EMS 150 A, 2. 2 Hz, F-EMS 200 A, 8 Hz, the ratio casting bloom of 8620 series gear steel with segregation index 0.98 ~ 1.05 increases to 92.8% from original 30%.3|0|0更新时间：2026-01-21
- 摘要：The impact and rolling composite friction and wear performance of 0.9C-9Mn-2Cr-Mo medium manganese steel and Hardox400 ( 0.22C-1.6Mn-1.4Cr-Mo) and Hardox500 (0.27C-1.0Mn-0.94Cr-Mo) wear resistant steels have been studied by M2000 multifunction friction and wear testing machine, and the structure transformation and wearing mechanism of steels are analyzed by X-ray difiractometer, SEM and TEM. Test results show that the hot-rolled medium steel has better impact-rolling composite wearing resistance than that of Hardox martensite wear resistance steels ；there is a hardened layer with 1 000μm thickness at impact-wear surface of medium manganese steel, its max microhardness value is up to HV490 and the Rockwell HRC hardness value is up to 53. The main wear mechanism is drill wear failure with local fatigue scale off, and the work hardening and improving wear resistance of medium manganese steel is mainly by dislocation strengthening, deformation twining and martensite phase transformation.关键词：0.9C-9Mn-2Cr-Mo;热轧中锰钢, 冲滚磨损;磨料磨损;磨损机理2|0|0更新时间：2026-01-21
- 摘要：The effect of C and Si content on mechanical property of low carbon cold-rolled steel(/% ：0.0051 ~0.0344 C,0.008 ~0.054 Si,0.28 ~0.30 Mn,0.023 ~0.026 P,0. 004 - 0.007 S. 0.044 ~0. 060 Al)has been studied. Industrial process is hot metal pretreatment-80tBOF-RH-continuous casting - hot rolling-acid pickling-cold rolling. Results show that the higher the C or Si content, the higher the strength and hardness, the lower the elongation. Cold rolling test was carried out in the laboratory,the test material was low carbon steel hot rolled (/% :0.0112C,0.009Si,0.30Mn,0.025P,0.006S,0.052Al) which produced in plant. Results of cold rolling test show that when the cold rolling reduction ratio increases from 41% to 57% , strength and hardness gradually increase, the elongating slightly elevate, When the content of C was 0. 005% ~ 0. 010% ,Si was ≤0.012% and cold rolling rate was 40% ~ 50% ,the tensile strength (Rm) of cold rolled sheet was less than 660 MPa and hardness (HRB) was 86 - 89. meeting technical requirement.关键词：低碳钢冷轧板, C含量, Si含量, 冷轧压下率, 力学性能5|0|0更新时间：2026-01-21
- 摘要：RM80 steel is the research object of this paper, used for the base metal of carbide band saw blade. The metallographic phase was observed by the metallographic microscope and scanning electron microscope were used to observe ; The hardness testing was observed by the hardness tester； Hie flatigue life was verified by the idling fatigue test and high-speed cutting of copper. Hie results show that the quenching at high temperature for shorting time is the best process for RM80 steel during high-speed cutting；the best quenching temperature range is from 1150 ℃ to 1160 ℃, the material with the carbide fully dissolved and even small martensite ；the best tempering temperature is 640 ℃, the metallographic phase of the material is tempering sorbite. Through high-speed cutting experiments, the fatigue performance of the back material of steel RM80 increased by about 30%.2|0|0更新时间：2026-01-21
- 摘要：Low carbon ultra-fine grain steel was fabricated by multi-pass rolling at room temperature, total reduction is 50% and 70% respectively and annealing at 500 〜650 ℃ for 2 min, martensite microstructure of low carbon steel Q235B obtained quenching after austenitizing. The effect of rolling reduction on microstructure and properties of ultra-fine grain steel was studied. Microstructure evolution was examined by optical microscopy and scanning electron microscope. Chemical composition of precipitate particles have been analyzed by energy dispersive spectrometer and the mechanical property was measured by an Instron-5969 tensile tester. The results indicate that cold-rolling and annealing with martensite initial structure can fabricate ultra-fine grained steel, the strength is nearly the double of that of the original steel. In addition, with the increase of the reduction amount, the recrystallization temperature decreases, and cementite particles can grow up easily, which is not effective to the improvement of the mechanical properties of ultra-fine grained steel. Under the same annealing process, the grain sizes of ferrite and cementite increase, and the comprehensive mechanical properties of specimens decrease with the reduction amount increases.8|0|0更新时间：2026-01-21
- 摘要：The 5. 0 mm strip of developed tested steel 510CL (/% : 0. 08C, 0. 07Si, 1. 25Mn, 0. 008P, 0. 005S, 0. 023Nb, 0. 018Ti) is produced by semi-steel desulphurization- 200 t top and bottom combined blowing converter-LF-230 mm x 1 650 mm slab casting-continuous rolling process. In order to ensure the better welding performance of wheel steel, the 500 MPa high strength wheel steel is developed by low carbon Nb-Ti microalloying combined TMCP ( Thermo-Mechanical Control Process) technology. The hole-expansion rate of tested steel is more than 100% , the welding performance is better, the cold-forming performance and the fatigue life of steel all meet the user technical index, and after application the test steel is up to design requirement.2|0|0更新时间：2026-01-21
- 摘要：The chemical composition design, steel purity improving, the heat treatment process and precipitates analysis of the The mechanical engineering of TQ960E microalloyed high strentth low carbon steel were studied. The results indicate that for the 12 mm hot-rolled plate of steel TQ960E (/% ：0. 18C, 0. 23Si, 1.50Mn, 0. 010P, 0. 003S, 0.06Ti, 0.002B, 0.006 3N, 0. 001 30) the optimum quenching temperature is 860 〜900 °C. and the tempering temperature is 300 〜350°C.The steel plates were developed and produced by industrialization, with the yield strength no less than 1 000 MPa, the tensile strength above 100 MPa, the elongation above 10% or higher and the Charpy impact energy at -40°C no less than 34 J. The steel can meet domestic standard and application requirements of high strength steel for engineering machinery.2|0|0更新时间：2026-01-21
- 摘要：The hot rolled single sided stainless steel clad plate of 316L stainless steel and Q345C carbon steel was carried out in a hot rolling line by the technology of “electron beam vacuum welding and hot rolling”. High quality single sided stainless steel clad plates were produced by asymmetrical compound billet and asymmetrically rolling. The productions of stainless steel clad plate have reached the requirements of GB/T8165-2008. The interface shear strength is greater than 320 MPa. Hie yield strength is greater than 370 MPa. The tensile strength is greater than 520 MPa. The elongation is greater than 30% , Stainless steel layer and plain carbon steel layer combining degree is good, the composite interface is straight and perfect. A good metallurgical bonding between stainless steel and carbon steel was achieved. The bonding rate reached 100%.关键词：不锈钢-碳钢复合板;复合坯;热轧;异步轧制;剪切强度2|0|0更新时间：2026-01-21
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