最新刊期
卷 31 ， 期 1 ， 2010
- 摘要：3-demensional thermodynamic coupling simulation for continuous rolling process of Φ100 mm round steel 42CrMo by 200 mm x 200 mm cast bloom has been carried out by using MSC. Marc finite element simulation software. As the plastic stain at round comer of stock in pass is larger and the deformation is gradually from surface to inner, the method of grid deviation division for cross section is adopted to fine the element of surface and round comer area. Based on the characteristics of stress field, strain field and temperature distribution as well as change of rolling force and torque during continuous rolling process, it is obtained that during alloy steel rolling, the larger total equivalent strain, equivalent stress and temperature drop are key reason of occurred crack at round comer of stock. The simulated values of cross section size of stock between stands and after rolling correspond to the measured values.关键词：42CrMo钢;棒材;连轧;有限元模拟4|0|0更新时间：2026-01-21
- 摘要：Theoretical calculation of Ostwald ripening regularity of Ti (C, N) in 0. 2% C, 0. 004% ~ 0. 008% N, 0. 02% 〜0. 05% Ti microalloying steel at 850 ~ 1 400℃ has been carried out. Results show that at below 1 000 °C , the coefficient of coarsening velocity- m of Ti (C, N) is less than 1 nm/s1/3at 1 400 °C that is 4 ~ 5 nm/s1/3with definite N content in steel and at definite temperature the coarsening velocity of Ti (C, N) increases with increasing Ti content, therefore with decreasing Ti content in steel is remarkably available for Ostwald-ripening of Ti (C, N), With definite Ti content in steel, at definite temperature the coarsening velocity of Ti (C,N) obviously decreases with increasing N content in steel, it shows that coarsening of Ti (C, N) particles in electric furnace steel are more difficult than that in converter steel.关键词：Ti微合金化钢;Ti(C,N);Ostwald熟化2|0|0更新时间：2026-01-21
- 摘要：The 50% hot deformation test on pipeline steel X52 (L360) ( % ： 0. 08 C, 0. 20Si, 0. 93 Mn, 0. 024Als, 0. 02Nb, 0. 02Ti) with strain rate 0. 01 ~ 10 s-1at 950 ~ 1 200 °C was carried out by Gleeble-3500 thermal simulator to get true stress-strain curves. Based on regression analysis, the activation energy and equation of hot deformation of steel X52 is defined and the effects of strain rate, temperature and Z parameter on peak stress of hot deformation are obtained. Results show that with decreasing the defbimation temperature, the peak stress increases and moves in the direction of strain increment, and with increasing the strain rate, the peak stress increases and also moves in the direction of strain increment ； the activation energy of hot deformation of steel X52 is 232 kJ/mol; and with increasing Z parameter T the peak stress of hot deformation increases.关键词：Pipeline Steel X52;Hot Deformation Behavior;Activation Energy;Z Parameter2|0|0更新时间：2026-01-21
- 摘要：The reaction of reduction of Mo03with different adding method by 500 g Fe-1. 80% 〜3. 50% [ C ] melts with nitrogen protective atmosphere at 1 300 ~ 1 500 °C has been studied. Results show that at W 1 400 °C with free slag condition, the reduction rate of Mo03by feeding MoO3powder is faster than that by adding Mo03pellet, and the [C] in melt is main factor to reduce MoO3as the [C] in melt is about 2% , then yield of molybdenum is up to 96% ； with slag condition, the effect of temperature of melts on reduction reaction of Mo03is larger, with increasing temperature, the reduction rate of Mo03increases, and the yield of molybdenum in 1.80% [C] melt is up to 100% at 1 500 °C. As the steel bearing Mo is melted by converter, to feed powder MoO3in hot metal, then form the slag with nice flowability is available to fast reduce MoO3and increase yield of Mo.关键词：Fe-C熔体;MoO3, ; 还原5|0|0更新时间：2026-01-21
- 摘要：The pass reduction (15% ~70% ) and temperature (850 ~ 1 150 °C ) on recrystallization fraction of tiefor- ming austenite of steel SCM435 (% : 0. 35C, 1. 05Cr, 0. 22Mo) has been studied by using stepped form stock rolling method, and the recrystallization diagram of the steel is got. Results show that with increasing deformation temperature, the critical strain of austenite of steel decreases. The complete recrystallization of austenite of steel SCM435 occurs at 1 150 °C with 45% reduction.关键词： Cold Heading Steel SCM435;Deformation Temperature, Strain, Recrystallization2|0|0更新时间：2026-01-21
- 摘要：The flow field in 190 mm x (1 500 ~ 1 900) mm wide slab casting mold has been studied by using a scale l：0, 8 water model and numerical simulated by Fluent software. Results show that in constant of liquid flow rate, with increasing the width of mold, the impact depth of flow increases, the level of vortex center drops, the flow rate at liquid surface in mold, the liquid level fluctuation and the shear stress of liquid flow to narrow side of mold decrease, and the probability of slag entrapment and bare liquid surface reduces gradually. In constant of liquid flow rate and using same nozzle, with increasing the width of mold section it is available to properly decrease the submerged depth of submerged nozzle.关键词：板坯连铸结晶器;水模型;数值模拟;流场;壁面剪切力2|0|0更新时间：2026-01-21
- 摘要：The classification of electro-slag metallurgy, the characteristics of first and secondary generation of electroslag metallurgical technology, the stage of development history of electro-slag metallurgy, the development of first and secondary generation of electro-slag metallurgical technology, and the orientation for further development of secondary electroslag metallurgy have been reviewed. It is pointed out that the first generation of electro-slag technology was developing accompanied with progress in eletro-slag remelting heavy-ingot, and with the rapid progress of nuclear power station, the optimum design of heavy equipment and optimum production technology for the secondary generation of electro-slag metallurgical technology should be realized to control remelting atmosphere, remelting and solidification process, and to increase computer control standard.关键词：Secondary Electro-Slag Metallurgical Technology;Heavy Electro-Slag Remelting Ingot;Inert Gas Atmosphere;Quick Cooling;Orientation for Development2|0|0更新时间：2026-01-21
- 摘要：The key technology for controlling the oxygen content in gear steel is analyzed including SiO2content in refining slag, (CaO)/( A12O3) , (FeO + MnO) , RH, Ar stirring and concasting process. Combined with process conditions at Vanadium Recovery and Steelmaking Plant, Panzhihua New Steel-Vanadium Co Ltd, with the process measures such as controlling converter end [C] ≥0. 10% , ladle slag thickness 50 ~ 80 mm and adding high basicity slag during tapping, LF white slag refining [ in slag T. Fe-0. 43% , ( MnO + FeO)-0. 93% , SiO2-5% , average (CaO)/(Al203) -1. 9] , RH treatment for 20 min, shielded continuous casting, and using suitable argon blowing models in ladle at back platform of converter, during LF refining and calcium treating, the total oxygen content in bloom of gear steel 20CrMoH is ≤15 X 10-6and the average total oxygen content is 11. 8 x 10-6.关键词：Gear Steel 20CrMoH;Converter;Bloom;Control of Oxygen Content2|0|0更新时间：2026-01-21
- 摘要：200 mm x 200 mm cast bloom of tyre-cord steel 72A (% : 0. 71 ~ 0. 72C, 0. 50 〜0. 60Mn, 0. 22 〜 0. 30Si,≤0. 010P, ≤0. 008S) is melted by hot metal pretreatment-LD-LF-RH-CC process flow sheet. During casting in conditions of liquid overheat 10 ~20℃ , cast speed 0. 98 m/min, secondary cooling water ratio 0. 32 L/kg, mold cooling water rate 220m3/h and mold electromagnetic stirring (EMS) with 1. 5 Hz and 500 A, the study of final mold electromagnetic stirring (F-EMS) process parameters are carried out. Results show that as the F-EMS is carried out at distance from liquid meniscus- 8 m with 18 Hz and 450 A, the central carbon segregation index of cast bloom of tire-cord steel 72A is ≤1.05.2|0|0更新时间：2026-01-21
- 摘要：According to the analysis on outer fold defect of Φ85 mm x 8 mm tube of 37Mn5 steel (0. 39% C, 1. 30% Mn) , it is obtained that the ~ 20 μm brittle inclusions-silicate and SiO2 existing at grain boundary in steel is main reason for formation of tube outer fold. With controlling thickness of top slag ≤50 mm in ladle after LD tapping, (FeO)≤l% , white slag time ≥15 min and soft argon blowing ≥10 min in LF refining, shield casting in whole process, the [ 0 ] is (11. 6 - 17. 1) x 10-6and the rating of inclusions in steel of A series is 0 ~ 2. 0，of B and C series is 0 and of D series is 0. 5 ~ 1. 0, that are available to control the formation of outer fold of steel tube.关键词：37Mn5 Steel Tube;Outer Fold;Reason for Formation;Process Control4|0|0更新时间：2026-01-21
- 摘要：Test to melt weathering-resisting steel SPA-H ( % : W0. 12C, 0. 30 ~ 1. 25Cr, 0. 25 ~ 0. 55Cu) by both processes of 60 t converter (liquid temperature 1 653℃ )- LF refining (slag basicity 2. 5 ~3. 0, feeding Al wire, Ar stirring) and hot metal pretreatment ([S] ≤0. 010% ) -60 t converter (liquid temperature 1 670 °C , adding 80 ~ 100 kg refining slag during tapping) -ladle feeding Al wire and Ar stirring ≥8 min has been carried out. Results by 62 heats practice show that for heats with LF refining, [O] before argon stirring is 37. 7 x 10-6feeding wire 25 kg, average [S] is 0. 014% ； and for heats without LF refining, [O] before argon stirring is 53. 3 X 10-6feeding wire 33. 9 kg, average [S] is 0. 017% ； the mechanical properties and inclusion rating of weathering-resisting steel produced by both processes all meet the requirement, but the process without LF refining is available to increase productivity and reduce consumption of materials.关键词：耐候钢;转炉;LF精炼;钢包吹氩2|0|0更新时间：2026-01-21
- 摘要：Edge crack of 5 mm strip coil of S31803 duplex stainless steel ( % ：0. 019C,22. 50Cr,5. 40Ni ,3. 15Mo, 0. 18N) rolled from 200 mm slab is often occurred. It is available to prevent the formation of edge crack of 5 mm hot continuous-rolled strip coil by controlling S content in steel ≤0. 005% and adding RE-Si-Fe alloy to modify sulfide, decreasing oxygen content in steel from 53 x 10-6to 26 x 10-6increasing equiaxed zone ratio in cast slab, and-controlling slab heating temperature at 1 150 - 1 250℃.关键词：Material Index Duplex Stainless Steel;Hot Continuous-Rolled Strip Coil;Edge Crack;Process Improvement2|0|0更新时间：2026-01-21
- 摘要：Bulging of 165 mm x 280 mm and 165 mm x 240 mm blooms easily occurs for partly R6 and R8 caster without secondary cooling pinch roll section casting as increasing cast speed. Based on analysis and test, it is obtained that with adjusting and increasing water rate at narrow side, the bulging of cast bloom improves obviously. With derived maximum stress formula at comer of bloom and adjusting solidification coefficient K, the deformation of each side of bloom is prevented to improve the bulging phenomena of bloom.关键词：Cast Bloom;Secondary Cooling System;Pinch Roll;Bulging2|0|0更新时间：2026-01-21
- 摘要：Steel 26CrMoNbTiB is melted by 45 t EAF-LF ( VD) -Φ80 〜180 mm tube billet HCC flow sheet. Test results of cleanliness of the steel at each melting process showed that the oxygen content in steel after LF-VD is (8 ~ 18) x 10-6with lowest average inclusion amount i. e. 2. 31 inclusions/mm2and that is 3. 66 inclusions/mm2in casting billet and the average content of ≥50μm micro inclusions in billet is 4. 08 mg/10 kg. To tighten the sealed shield of long nozzle from ladle to tundish, use monitoring instrument for ladle slagging out, increase tundish capacity and use dam in tundish are the key process measures to further improve cleanliness of billet。关键词：钻杆管用钢26CrMoNbTiB;EAF-LF(VD)-HCC;洁净度5|0|0更新时间：2026-01-21
- 摘要：The main reasons of 5 t ingot carbon-pickup and low desulphurization ratio for pure iron during electroslag remelting (ESR) process are analyzed. With the process measures including to replace original remelting slag (% ) ~70 fluorite, ~30 alumina powder, 3 -7SiO20. 05 ~0. 09C by new remelting slag (% ) 65 fluorite, 25 alumina powder, 10 limestone, ≤SiO2≤0. 02C; adopting the process measures such as using 1 t ESR ingot with increasing mold packed ratio from 30% to 45% , and adding aluminum powder during electroslag remelting, the maximum carbon-pickup in ESR pure i- ron decreases to 0. 001% from original 0. 067% , the average desulphurization ratio increases to 53. 4% ~78% from original 41% ~46% and the carbon and sulfur content in ESR ingot are all ≤0. 003% , to meet the requirements of quality of ultra-low carbon-ultral-low sulfur prue iron YT01B.关键词：电渣重熔;纯铁;碳;硫控制2|0|0更新时间：2026-01-21
- 摘要：Effect of 60% - 80% cold reduction on structure, texture and mechanical properties of 1. 4 ~0. 7 mm cold rolled deep-drawing strip steel from 3. 5 mm CSP (Compact Strip Production) hot rolled plate has been studied. Results show that with increasing cold reduction to 80% from 60% , the beginning recrystallization temperature of cold rolled strip steel decreases to 520 °C from 560 Y and the structure of strip steel products fines, and with 74. 3% cold reduction the DQ lever deep-drawing performance is optimum. With increasing cold reduction the △r value of deep-drawing strip steel products gradually decreases, that is relating to enhancement of orientation function f/(g) value of {112}〈110〉 texture in strip steel products.关键词：CSP;DQ;Cold Reduction;Structure;Texture;Mechanical Properties2|0|0更新时间：2026-01-21
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Effect of Heat Treatment on Structure and Mechanical Properties of Cold Work Die Steel Cr8WMo2V2SiNb
摘要：Effect of quenching treatment at 1 000 ~ 1 240 Y and quenching at 1 100 °C + tempering at 200 〜580℃ treatment on quenched structure and grain size, quenched-tempered structure, hardness and impact energy of 613 mm forged product of steel Cr8WMo2V2SiNb (% ： 0. 96C, 1. HSi, 7. 79Cr, 1. 79Mo, 2. 16V, 0. 96W, 0. 60Nb) melted by a 25 kg vacuum induction furnace, has been studied. Results show that with 1 100 ℃ quenching, the hardness HRC value of steel Cr8WMo2V2SiNb is 64. 5, with 1 100 ℃ quenching + 520 ℃. tempering the steel has obvious secondary hardening effect, and the hardness of steel is coming to maximum i. e. HRC62. 5 with better toughness i. e. impact energy 8. 7 J.2|0|0更新时间：2026-01-21 - 摘要：Test 700 MPa low carbon bainitic steel is melted by a 30 kg vacuum induction furnace, cast to 100 mm x 50 mm flat ingot and rolled to 12 mm plate. Based on CCT curves and analysis on structure of steel at cooling rate 3 ~30 Y/s, the effect of two group microalloying： 0. 06Ti-0. 05Nb and 0. 01Ti-0. 03Nb on structure and mechanical properties of low carbon bainitic steel- % : 0. 059 ~0. 066C, 1. 41 ~ 1. 67Mn, 0. 30 ~0. 36Si, 0. 37 ~0. 48Cu, 0. 21 ~0. 24Ni, 0. 18 ~ 0. 22Mo, 0.000 8 ~0. 002 2Bs, 0. 002 6N has been studied. Results show that the strength of steel with 0. 06Ti-0. 05Nb is higher than that of steel with 0. 01Ti-0. 03Nb, but the impact energy at -40 °C of the former, of which the Ti content is higher, is lower than that of the later. The available microalloying Ti-Nb content in 700 MPa low carbon bainitic steel is 0.015% -0. 025%Ti-0. 04% ~0. 05% Nb.2|0|0更新时间：2026-01-21
- 摘要：Effect of finishing temperature (750 ~900 °C ) and product size (Φ12 mm and Φ5. 5 mm) of rod on precipitation of carbide network in bearing steel GCrl5 has been studied. Results show that as railing ① 12 mm rod, with finishing temperature 800 °C , the rating of carbide network is minimum i. e. 1. 5, with decreasing finishing temperature to 750 °C , the rating of carbide network increases to 2. 0 ； as rolling Φ5. 5 mm rod, with finishing temperature 850 °C , the rating of carbide network in minimum i. e. 1. 5, with decreasing finishing temperature to 800°C the rating of carbide network increases again to 2. 5. For the light rod, the too low finishing temperature is not available to inhibit the precipitation of carbide network in steel. Therefore the optimum finishing temperature is related to specification of rolled products.关键词：Steel GCrl5;Carbide Network;Finishing Temperature;Specification of Rolled Product2|0|0更新时间：2026-01-21
- 摘要：Structure of heat-resistant steel 1 Crl2Ni3Mo2VN quenched at 1 040 T for 1 h oil cooling, furnace cooling (5 T/min) , 1 °C./min and 0. 5 °C/min cooling and mechanical properties of the steel quenched at 1 040 °C for 1 h with different cooling rate + tempered at 565 °C for 2 h have been studied. Test results show that martensite structure of the steel quenched with four cooling rate is obtained, but AKV2value of the steel by quenching, oil cooling and tempering is 156. 5 J, while that by quenching, 5 ~0. 5 °C/min cooling and tempering is 40. 5 - 16. 5 J. The thermal decomposition of retained austenite in steel slow-cooled is main reasons for impact energy marked decreasing, i. e. during quenching slow- cooling at 720 ~ 820 °C, a large amount of carbide precipitates at original austenite grain boundary led to obvious decreasing alloying elements and carbon content in residual austenite and poor stability of residual austenite in quenched structure.关键词：耐热钢1Cr12Ni3Mo2VN;淬火冷却速度;组织;力学性能5|0|0更新时间：2026-01-21
- 摘要：The continuous cooling transformation ( CCT) curves of deformed austenite of V microalloying steel SWRH82B-1V (% : 0. 79C, 0. 23Si, 0. 63Mn, 0. 18Cr, 0. 05V, 0.004 ON) were measured by thermal simulator Gleeble 2000 and the effect of cooling rate (1 〜15 °C/s) on area fraction of sorbite and martensite in steel and HV hardness value of the steel was studied. And the effect of percentage of cooling wind at Stelmor production line on structure and mechanical properties of Φ12. 5 mm wire coil of steel SWRH28B-1V was studied by changing cooling mode. Results show that as the outlet temperature of finishing coil is 880 T , cooling with 50% wind rate, the area fraction of sorbite and martensite in the steel is respectively ≥90% and ≤0. 05% , and the tensile strength of the coil is ≥l 130 MPa while its area of reduction is ≥30%.关键词：SWRH82B-1V高碳钢;钒微合金化;盘条;控制冷却;索氏体;抗拉强度2|0|0更新时间：2026-01-21
- 摘要：The continuous cooling transformation (CCT) curves of 18 mm plate of X80 pipeline steel (% : 0. 05C, 0. 17Si, 1.78Mn, 0. 40Mo, 0.08Nb, 0.03V, 0. 03Ti) with 1 s-1and 40% deforming at 1 100°C , then 5 T/s cooling to 850 °C , 1 s-1and 40% deforming and 1 ~40 °C/s cooling to ambient temperature were determined by Gleeble-1500 ther- mo-simulition machine and the effect of cooling rate on structure and HV hardness of steel was studied. Results show that with increasing cooling rate, the grains fine, the proportion of acicular ferrite in structure increases and the HV hardness of structure also increases. In order to get better structure, the cooling rate of hot-deformed steel should be ≥15 °C/s.关键词：X80 Pipeline Steel;CCT Curves;Hot-Deforming;Cooling Rate;Structure;Hardness2|0|0更新时间：2026-01-21
- 摘要：The effect of 0. 008 7% 〜0. 150 0% N on tensile and compression properties of hot-rolled steel 0Crl8Ni9N (% ： 0.044 〜0.049C, 0.41 〜0.51Si, 1.46 ~ 1.52Mn, 17. 92 ~ 18. 15Cr, 9.09 〜9.24Ni, 0.01 〜0.03Ti) with strain rate 5 x 10-3s-1and 1 s-1at 800 〜130 0 °C has been studied by using Gleeble 1500 thermal simulation machine and the effect of N content on dynamic recrystallization of the steel is analyzed. Results show that with increasing N content in steel the reduction of area of the steel obviously decreases while its optimum temperature range of thermoplasticity increases ； as the N content in steel is less than 0. 050 0% , the optimum temperature range of thermoplasticity of the steel is 950 - 110 0 °C, and as N content is 0.080 0% 〜0. 150 0% , that is 1150 - 1250 °C .2|0|0更新时间：2026-01-21
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