最新刊期
卷 32 ， 期 4 ， 2011
- 摘要：Based on the characteristics of water-cooling heat transfer of steel 82B and 72A Φ5. 5 ~ 12. 5 mm high speed rolled wire rods after rolling, with dividing water cooling process to 3 zones and according to open/close state of circle water nozzles, the boundary conditions according to nozzle number to deal with water cooling process in zones have been established by using two heat transfer models of water forced convection and water vapor convention heat transfer, and the temperature distribution of wire rod cross section after rolling in water cooling system is obtained by finite difference simulation. With real measured temperature value to correct the convection heat-transfer coefficient of water in water cooling process of high carbon steel wire rods, the simulation results show that the absolute error of average value between predicted and measured wire rods surface temperature at inlet of finishing rolling mill and at wire nozzle is within ± 20 ℃.2|0|0更新时间：2026-01-21
- 摘要：Based on theoretical formulae for medium and heavy plate straightening force and measured data in production of steel Q345 22 〜40 mm plate straightening at 500 ~ 630 T , taking undetermined coefficients in math models of deformation force and elastic modulus as optimized variables, minimum error of straightening force calculation as objective function, the math models of deformation resistance and elastic modulus of steel Q345 medium and heavy plate during straightening process is established by using simplex algorithm to optimized calculate the undetermined coefficients. It is obtained that in straightening process of steel Q345 medium and heavy plate at 500 ~ 630 °C, with increasing temperature (T) the deformation resistance (as) decreases: as = - 1 080. 1 +4. 854 7 T - 0. 004 811 5 尸；and with increasing temperature (T) the elastic modulus (E) increases earlier and decreases later： E = ( -6. 480 7 x 105) + 2 576. 5 T - 2. 387 5 T2. Results show that the relative error between calculated and measured value is less than 5%.2|0|0更新时间：2026-01-21
- 摘要：Taking a T-shape tundish for 6-strand 150 mm x 150 mm casting billet at Tangshan Steel as an object of study, 3-dimension numerical simulation and optimization on fluid field of liquid in tundish have been carried out by using commercial software ANSYS. The flow characteristics of liquid in tundish and flow mode of liquid in tundish setting flow control devices are studied. Results show that setting reasonable blocking dams and guide holes are available to improve the metallurgical effect of tundish； three guide holes respective with diameter (mm) - 72, 36 and 93, location (mm) - (220, 140), (350, 280) and (700, 300), and inclined angle- (21°, 15°), (8°, 23°) and (10°, 28°) are most reasonable for fluid field in tundish.2|0|0更新时间：2026-01-21
- 摘要：Effect of steel works 210 t RH refining treatment time, driving gas flow rate, vacuum, number of stomata and immersion depth on inclusion removal and the effect of bottom-blowing pattern and gas flow rate on amount of slag entrapment have been studied by using geometric similarity ratio 1：4 water model. Simulation test results show that the inclusions in liquid decrease by ~90% as treatment for 24 min and at vacuum chamber descending the short-term bottom argon blowing by double porous brick is obviously available to decrease the amount of slag entrapment in liquid. It is obtained that suitable process parameters for 210 t RH refining are driving gas flow rate- 164. 2 m3/h, 8 stomata, immersion depth- 500 mm, absolute pressure in vacuum chamber- 4 000 Pa and double porous brick total argon blowing flow rate- 90 m3/h.关键词：210 t RH精炼;夹杂物;卷渣;水模型2|0|0更新时间：2026-01-21
- 摘要：The three-dimensional flow field, concentration field and temperature field of a 35 t 6-strand tundish for 12-strand 150 mm x 150 mm continuous machine at Xuanhua Steel have been studied by using numerical simulation and the optimum flow control device slag dam with hole diameter 120 mm, horizontal deviation angle 5° and vertical angle of elevation 5° is obtained. Application Results show that the flow field in structure-optimized tundish improved obviously, the flow behavior of each strand of tundish becomes consistent, the impacting of liquid on 6-th strand stopper is alleviated, the temperature difference between each strand decreases to 4 K from original 10 K and the continuous casting time increases to 26 h from original 20 h.关键词：12流小方坯;6流中间包;结构优化;数值模拟2|0|0更新时间：2026-01-21
- 摘要：The progress of new products of energy saving cold heading steels including spheroidizing-annealing-free boron-bearing steels, cold working hardening non-quenched and tempered steels avoiding spheroidizing-annealing and dispensing with quenching and tempering process, online-softening cold heading steels and ultra-high strength steels for lock bolts etc produced by 100 t EAF-LF-150 min x 150 mm CC-CR process flow sheet at Shasteel is presented. The structure, mechanical properties, hardenability and cold-heading performance of each developed steel grade are analyzed in this article. The application effect of energy-saving cold heading steels at users is well.关键词：100 t EAF-LF-CC-CR流程;冷镦钢;开发2|0|0更新时间：2026-01-21
- 摘要：The application characteristics of hot coil-box in hot continuous rolling production of stainless steels including structure feature of equipment, operating schedule, processing layout, automation control and existing trouble are presented. According to temperature sensitive feature of stainless steel, during hot rolling production of stainless steels the hot coil-box technology is an ideal measure for intermediate holding of transferring strip coil. The operating trouble of hot coil box may overcome by equipment improvement and experience accumulation in production.关键词：热卷箱;不锈钢;热连轧;应用特点2|0|0更新时间：2026-01-21
- 摘要：The change of nonmetallic inclusions in X80 pipeline steel (%: 0. 041 〜0. 044C, 0. 15Si, 1. 78 -1. 80Mn, 0. 007 ~ 0. 010P, 0. 000 8 ~ 0. 001 2S, 0. 039 ~ 0. 047 F Al] s) produced by 210 t BOF-LF-RH-slab CC flow sheet during refining process has been studied. With adding Al during BOF tapping for intensifying deoxidation (0. 01 % 〜 0. 02% [ Al] s) and using high basicity and reducibility refining slag (ingredient /%: 50 〜58CaO, 7 ~ l0MgO, 20 ~ 25Al2O34 - 7SiO20. 5 - 1.4TFe) in LF refining process to activate the slag-metal reaction, the Al2O3inclusions in steel are quickly transformed to liquid calcium aluminates and part-liquid CaO-MgO-Al2O3complex compound inclusions. The cleanliness of steel liquid is improved by liquid and part-liquid inclusions colliding with one other, agglomerating, coarsening and floating removing. Before casting the T [O] decreases to (7 〜10) x 10-6the size range of inclusions in steel is 3 ~ 5μmand the large-scale low melting point calcium aluminate stringer inclusion doesn,t be found in hot rolled plate of test heats.2|0|0更新时间：2026-01-21
- 摘要：The breakage ratio in stranding process of 00. 22 mm steel tire cord cold-drawn from 05. 5 mm coil produced both process flow sheet of 70 t BOF-LF-①380 mm bloom CC-breakdown 150 mm x 150 mm billet-CR and 200 t BOF- LF-200 mm x 200 mm bloom CC-CR process is ①380 mm round bloom process-2. 86 times/t and 200 mm x 200 mm bloom process-less than 1 time/t. Examination results show that the main factor for massive cord breakage is distinct central segregation of coil produced by round bloom, and the macro carbon segregation of 150 mm x 150 mm rolled billet is up to 1. 1 L Using bloom casting flow sheet with cross section size more than 200 mm x 200 mm, control over heating degree of liquid in tundish 15-25 °C, constant casting speed and using mold and end electromagnetic stirring are available to decrease the central segregation.3|1|0更新时间：2026-01-21
- 摘要：The KR method is selected for pretreated desulphurization of 205 t hot metal according to the comparison results of advantages and characteristics between KR mechanical stirring method and jetting method. The main ingredient of used desulphurizing agent is (%) 76 ~80CaO, 7 〜12CaF2≤5SiO2. Production results show that after pretreatment by KR stirring method, the sulfur content in hot metal may decrease to less than 0. 005% ； the service life of stirring head is 270 heats; the total pretreated time by KR method is 35 - 42 min ； and the desulfurization amount in converter melting is less than 0. 002%.2|0|0更新时间：2026-01-21
- 摘要：The flow sheet for production of gear steel 20CrMnTiH at Jiyuan Iron and Steel Co is 601 top and combined blown converter-LF (VD) -150 mm x 150 mm billet concasting process. With controlling BOF end [ C] ≥0. 08%, using silicon-calcium-barium, ferro-aluminium and aluminium shot combined deoxidizing in ladle, LF refining by SiO2-Al2O3- CaO slag series and micro adjusting Ti content in liquid by feeding Ti-Fe wire during LF refining, soft argon blowing N15 min after VD vacuum treatment, auto controlling liquid surface in tundish, whole shielding casting and M-EMS and F-EMS stirring, the analysis of finished gear steel 20CrMnTiH is (%) 0. 19 ~0. 21C, 0, 23 ~ 0. 27Si, 0. 86 〜0. 90Mn, 1.11 〜 1. 15Cr, 0.057 ~ 0.063Ti, ≤0.020P, ≤0.010S, (5.6-19.3) x10-6(40.6 -65.2) x10-6and the J9 HRC value of 032 ~40 mm steel products is 34. 42 -39. 10, △HRC≤6, and all examination indexes meet the requirement of standard.2|0|0更新时间：2026-01-21
- 摘要：According to analysis on telescoped coil produced during coiling process of hot galvanized strip, it is obtained that the unmatched coiling tension and the slip of mandrel in sleeve are main causes to bring about telescoped coil defect. To revamp the mandrel of coiling tension reel, use the coiling model of constant tension control combined constant torque control, and optimize the coiling tension are available to avoid the formation of telescoped coil of hot galvanized strip.关键词：热镀锌板卷;尾塔形;张力卷取机;芯轴;扭距控制;卷取张力优化2|0|0更新时间：2026-01-21
- 摘要：The LF hot return slag process at Shougang is reutilized to refine steels including steel 82B, 40Cr, 20CrMnTi and 60Si2Mn. During refining special steels in LF with using hot reducing return slag, 200 〜400 kg/heat of synthetic slag or active lime is added, the consumption of calcium carbide increases properly, and the slag is deoxidized by aluminum shot, calcium carbide and silico-ferrite powder. Production practice shows that with using this process the refining desulphurization rate is more than 50%, after LF refining the liquid oxygen activity ≤ 10 x 10-6the LF slag making materials- synthetic slag decreases by 5kg/t steel and submerged arc slag decreases by 2 kg/t steel, and the melting cost decreases by 7 yuan/1 steel. The hot refining slag has higher reutilization value.2|0|0更新时间：2026-01-21
- 摘要：As the requirement for included element C, P, S and Si content in ultra-pure austenite steel 005Cr25Ni20 (% ：24 ~26Cr, 19 〜22Ni) are very low i. e. (%) ：≤0. 010C, ≤0. 010S, ≤0. 010P and W≤0. 15 Si, the steel is smelted by 3 t vacuum induction furnace 4- vacuum consumption remelting furnace steelmaking process. With using quality pure iron (% ： 0. 009C, 0. 035Si, 0. 001 2S, 0. 004 5P), high pure chromium iron (%: 0. 010 - 0. 021C, 0. 11 - 0. 13Si, 0. 002 5 ~0. 005 OS, 0. 001 5 ~0. 005 OP) and Ni-plate (Ni399%), adding Al, metal Ca, Ni-Mg for deoxidation during vacuum induction smelting, and whole process computer control vacuum consumption remelting speed, the chemical composition of finished products of steel is (% ：) 0. 005 〜0.007C, 0. 33 〜0. 34Mn, 0. 03 -0. 04Si, 0. 001 〜0.002S, 0. 004 〜 0. 005P, 24. 34 〜24. 62Cr, 21. 20 〜21.25Ni to meet the technical requirement, and the oxygen content in steel- (12 ~ 22) x 10-6is lower than in steel by ESR process- (30 ~ 80) x 10-6.2|0|0更新时间：2026-01-21
- 摘要：With using the process measures including adding 40% of needed ferromanganese amount in ladle before tapping of arc furnace, adjusting analysis of liquid in earlier stage of LF refining, controlling refining slag basicity N2. 5 and soft argon stirring in middle and last stage of refining, controlling overheating of liquid in tundish ≤35 ℃ and whole process shielding casting, the steel 80Mnl4 (%:0.75〜0.96C, 13. 00 - 15. 50Mn, ≤ 0.80Si, ≤0.070P, ≤ 0.030S) is successfully produced by 30 t EBT AF-35 t LF-260 mm x 300 mm caster flow sheet at Nol Steelmaking Works, Guiyang Steel, and all properties of products meet the requirement of standard.2|0|0更新时间：2026-01-21
- 摘要：Cr12N alloy (% ： 2. 03 〜2.26C, 0. 16 〜0. 33Si, 0. 29 ~0. 37Mn, 11. 86 〜11.96Cr, 0. 09 〜0. 28N) is melted by a 10 kg vacuum induction furnace with N-alloying by filling nitrogen and adding silicon nitride. The Crl2N alloys bearing different N content are heated to 1 180 for 3 min with 10 °C/s at vacuum, then cooled to 1 100 ~900 °C for 20 s with 10 °C/s and compressed by 30% with 1 ~ 10%" by using a Gleeble-1500 thermo-mechanical simulation machine to get the true stress-strain curves and the effect of nitrogen on mechanical properties of the alloy at high temperature. Results show that N inhibits occurrence of dynamic recrystallization of alloy ； as deformation at high temperature the dynamic recovery is dominating softening mechanism of the Crl2N alloy； and as compared with 0. 09% N alloy and 0. 28% N alloy, the 0. 18% N alloy has higher peak stress and yield stress, and its recovery activation energy is lowest.2|0|0更新时间：2026-01-21
- 摘要：A new as-cast ultra-low carbon low nickel medium nitrogen austenite stainless steel 022Cr20Mnl0Ni6N (% ： 0.023 〜0.027C, 9. 86 -9. 95Mn, 19. 24 〜20. 09Cr, 5.41 〜5.42Ni, 0. 27 ~0. 34N) is melted by a 15 kg medium induction furnace, and the structure, mechanical properties and corrosion resistance of as-cast steel 022Cr20Mnl0Ni6N and as-cast steel 304 (% ： 0. 076C, 1. 87Mn, 18. 02Cr, 8. 64Ni) have been tested and studied. Results show that the mechanical properties, pitting corrosion resistance and anti-weak acid and weak alkali even corrosion of the new as-cast stainless steel are better than that of as-cast stainless steel 304, its neutral salt spray corrosion resistance is equal to as-cast steel 304. The new as-cast steel 022Cr20Mnl0Ni6N can meet the application requirement of glass curtain wall metal connector in atmospheric environment.2|0|0更新时间：2026-01-21
- 摘要：Steel 30Cr2Ni4MoV (% ： 0. 15 ~ 0. 16C, 0. 03 〜0.45Si, 0. 12 〜0. 14Mn, 0. 005 P, 0. 005 〜0.006S, 1. 62 ~ 1. 72Cr, 3. 60 〜3. 63Ni, 0. 52 〜0. 53Mo, 0. 07V, ≤0.005Al) is melted by a 10 kg vacuum induction furnace, forged bar treaded at 930 °C air cooling + 900 °C air cooling +640 °C air cooling, then water quenched at 850 ℃ following tempered at 600 ℃. Examination results show that as the Si content in steel increases from 0. 03% to 0. 45%, the amount of martensite in steel increases and the grains become coarser ； and the tensile and yield strength of steel increase respectively from 922 〜936 MPa and 868 〜873 MPa to 1 015 〜1 028 MPa and 950 〜959 MPa, while the average impact energy of steel decreases from 205 J to 154 J.关键词：超超临界汽轮机转子钢30Cr2Ni4MoV; Si含量;组织;力学性能5|0|0更新时间：2026-01-21
- 摘要：The effect of austenitic treatment at 860 ~ 980 °C on microstructure of steel 30CrSiMnNiWMo (% :0. 28C, 0. 74Mn, 1. 04Si, 2. 70Cr, 1. 15Ni, 0. 45Mo, 1.04W, 0. 07V, 0. 05Al) and mechanical properties of steel tempered at 260 °C has been studied. Results show that there are a lot of carbide M6C in microstructure of steel 30Cr3SiMnNiWMo quenched at 860 ~ 920 °C led to slightly decrease toughness of tempered steel, and after quenched at 950 °C , the carbides in steel are basically dissolved and the original austenite grains of steel beginning coarsen led to de- crease strength of tempered steel ； with oil quenched at 920 ℃ for 1 h + tempered at 260 °C for 2 h, the steel 30Cr3SiMnNiWMo has lath martensite microstructure with minor residual austenite and un-dissolved carbides, so it has excellent strength and toughness i. e. UTS- 1 680 MPa, YS- 1 330 MPa, elongation- 13% , RA- 58. 3% and impact energy- 85 J.2|0|0更新时间：2026-01-21
- 摘要：The longitudinal crack of 37Mn5 steel 280 mm x 380 mm concasting bloom produced by 120 t converter- LF-VD-bloom caster process often occurs in production. The hot plasticity and mechanical properties of 280 mm x 380 mm concasting bloom of 37Mn5 steel (% ； 0. 34 ~ 0. 38C t 1. 30 - 1. 55Mn) and 0. 45C steel (%: 0. 42 〜0. 50C, 0. 50 〜 0. 80Mn) at 1 300 - 800 ℃ and their dilatometric-shrinking effect during heating and cooling between ambient and 1 300 °C have been tested and analyzed by using Gleeble 1500D thermal simulation machine. It is obtained that as compared with 0. 45C steel bloom, at W950 °C the hot plasticity of 37Mn5 steel bloom is lower and the change of volume at phase transformation range is larger than that of 0. 45C steel bloom led to occurrence of longitudinal crack. Therefore, heating and cooling speed of 37Mn5 steel bloom between 870 Y and 540 Y should be slowed down to avoid occurrence of longitudinal crack.关键词：Mn;中碳钢;连铸坯;高温性能;纵向裂纹2|0|0更新时间：2026-01-21
- 摘要：The effect of solution treatment at 1 050 - 1 150℃ on structure and mechanical properties of 1. 0 mm cold rolled plate of nickel base alloy 690 (% ： 0. 020C, 29. 93Cr, 9. 82Fe, 0. 19A1, 0. 25Ti, 0. 023Nb, 0. 012Mo, 0. 004 2N) melted by a 20 kg vacuum induction furnace has been studied. Results show that with increasing temperature of solution treatment from 1 050 Y to 1 100 ℃ the average grain size of steel linearly increases from 12 μm to 29 μm, with the temperature being more than 1 100 °C , the grain size increases rapidly and the average grain size is up to 58 at 1 150 ℃； as solution treatment temperature is more than 1 090 °C , the chromium-rich carbides in alloy dissolve completely; the fine grained strengthening is main strengthening mechanism of alloy 690, with increasing solution temperature, the ambient tensile and yield strength of alloy decrease respectively from 780 MPa and 400 MPa to 662. 5 MPa and 250 MPa, while the elongation of alloy increases from 40% to 51. 75%.关键词：690镍基合金;固溶处理;组织;力学性能8|0|0更新时间：2026-01-21
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