最新刊期
卷 33 ， 期 1 ， 2012
- 摘要：As the steel GCrl5 (1. 01%C, 1. 48% Cr) is melted in an 100 kg induction furnace up to 1 580 ℃, the metal liquid flows through furnace bottom liquid conduct nozzle and sprays in atomized chamber by high pressure nitrogen flow to atomize micron liquid drops and form deposition billet at bottom. The compared analysis on pore distribution, microstructure and density of spraying formed steel GCrl5 has been carried out by using optical microscope, scanning electron microscope. Results show that there are macro-pores at deposition billet cross section and irregular-shaped micro-pores distributed in whole deposition billet. The average relative density of whole deposited billet is 85. 51%.关键词：GCr15钢;喷射成形;沉积坯;孔隙;致密度2|0|0更新时间：2026-01-21
- 摘要：The sheet piling (/% ： 0. 12 ~0. 22C, 0. 15 ~ 0. 55Si, 0. 80 ~ 1. 50Mn) is rolled by two-high reversing mills and universal tandem reversing mills. The stress-strain curves of the steel of sheet piling with strain rate 0. 5 ~5. 0 s-1at 980 ~ 1 030 °C are obtained by thermal simulation test, and the three-dimensional thermo-mechanical coupling simulation on sheet piling in rolling process has been carried out by using elastic-plasticity finite element method and software ABAQUS. In view of occurring mill overload situation in rolling process, the rolling load in each pass in rolling process is analyzed, and the groove filling improves, and the rolling load decreases by changing relative passes roll gap.关键词：钢板桩;弹塑性;轧机过载;热力耦合;有限元法2|0|0更新时间：2026-01-21
- 摘要：The effect of first roll and last roll position on plate flatness and surface residual stress of 22 mm Q345 steel plate (/% ： ≤0. 20C,≤ 0. 55Si, ≤1. 70Mn, 0. 02 - 0. 15V, 0. 015 ~ 0. 060Nb, 0. 02 ~ 0. 20Ti) during leveling process by a 9-roll straightener has been studied by established finite element model to get the position of un-flatness is mainly at tail of plate. With free adjustment of height of Nol (first) roll and No9 (last) roll the plate is ensured no-bending up and down as the plate is out of straightener. The residual stress at upper surface of plate is lower that at bottom surface, and along the length direction of plate, the residual stress at head of plate is lower than that at end of plate.关键词：9辊矫直机;Q345钢;22mm板;有限元模拟。 平直度;残余应力2|0|0更新时间：2026-01-21
- 摘要：The volatilization characteristic of molybdenum trioxide ( MoO3) is the main reason led to low yield of Mo, while the Mo03stabilizing treated by CaCO3is an effective way to inhibit the volatilization of MoO3. The low-temperature solid phase reaction between MoO3and CaCO3has been studied according to thermodynamics and kinetics law. Results show that MoO3and CaCO3may react at 450 ℃ to form stable CaMo04the reaction is faster at 600 ~ 700℃ and there is no volatilization of MoO3therefore it is available to pre-treated MoO3at the temperature range. The CaCO3and MoO3solid phase reaction kinetics parameters at different heating speed are calculated by Coats-Redfern function, the activation energy (E) and pre-exponential factor (4) are respectively 167.45 kJ/mol and 1.22 x 107s-1and the reaction rate constant k - 1.22 x1O7x exp( -20 140/T).关键词：碳酸钙;三氧化钼;抑制挥发;热力学;动力学3|0|0更新时间：2026-01-21
- 摘要：The liquid flow field in mold of a 200 mm x 1 300 mm vertical slab caster and the effect of nozzle structure parameters (side hole size 40 mm x40 mm ~ 40 mm x80 mm, side hole angle +15° 〜-15°) with depth of submerged entry nozzle 115 mm and casting speed 0. 55 m/min on mold level fluctuation have been studied by using 1： 1 water mold, and based on calculation of fluid mechanics, the 3-dimensional numerical simulation of flow field in slab mold is carried out by using Fluent software and k-e high Re equation turbulence model. Results show that the numerical simulation results coincide with the results of physical simulation ； the effect of nozzle structure parameters on liquid level turbulent kinetic energy is obvious； in Nol ~ No4 nozzles, the service performance of No2 nozzle (40 mm x40 mm, + 15°, downward, bottom with inverted Y shape) is relative better； and the shallower the strand impact depth, the larger free surface turbulent kinetic energy.关键词：连铸机;结晶器;液面湍动能;浸入式水口;物理模拟2|0|0更新时间：2026-01-21
- 摘要：The basic alloying elements in super-bainitic steels are C-Mn-Si and the structure of ultra-fine bainite, martensite and residual austenite is obtained by low temperature phase transformation at 300 〜500 ℃. In order to decrease critical cooling velocity, promote bainite transformation, partial super-bainitic steels are added Cr,Ni,Mo etc. alloy elements with decreasing C, Mn content to improve weldability of steel products. The super-bainitic steel has ultra-high strength and better plasticity, and its yield and tensile strength are respectively 〜1 200 MPa and 1 600 ~ 1 700 MPa with elongation ~ 15%. The yield strength of new generation super-bainitic steel is more than 1 300 MPa, and its tensile strength is more than 1 700 MPa.2|0|0更新时间：2026-01-21
- 摘要：The vacuum electroslag remelting (VESR) furnace is a developed special vacuum remelting metallurgical unit for melting high performance alloy based on vacuum arc remelting (VAR) and gas-shielded electroslag remelting (ESR). The steel grades and alloys remelting by VESR are high quality alloy steels, high temperature alloys, precious alloys, anti-corrosion alloys and aluminium, titanium and silver alloys. This article introduces the working principle and metallurgical characteristics of VESR, compares the melting cost, metallurgical quality and properties of steel products melted by VAR, general EAR and VESR, and discusses application prospect of VESR.2|0|0更新时间：2026-01-21
- 摘要：A primary test analysis on metallurgical functions of an 80-t single snorkel vacuum refining furnace has been carried out. Results show that the single snorkel vacuum refining furnace has the metallurgical functions including dehydrogenation ,denitriding, decarburizing, deoxidation, desulphurization, liquid heating by chemical reaction, removing inclusions in liquid and adjusting alloy component. By using the 80-t single snorkel vacuum refining furnace to refine liquid, the hydrogen and oxygen content in alloy constructional steels are respectively reduced to (0. 9~1.2) x 10-6and (9 - 12) x 1O-6in ultra-low carbon steels, the carbon content is (10 ~ 20) x 10-6the nitrogen content is (29 ~ 37) x 10-6and the sulphur content is (10-30) x 10-6the single snorkel refining furnace has better heating function by chemical exothermic reaction and its inclusions removing effect is equal to that of RH refining unit ； the results of 20 heats ultralow carbon steel alloy-compound-adjusting in single snorkel refining furnace show that the yield of alloy elements is high, the yields of silicon, manganese and aluminum are respectively 93% ~96% , 93% ~95% and 64% ~67%.2|0|0更新时间：2026-01-21
- 摘要：The original process to produce 300 series stainless steel at steel works is 140 t EAF-150 t AOD two step method, and with charging partial low nickel high phosphorus pig iron, the EAF end [ P] is 450 x 10-6. In order to decrease EAF end [P], the improved process-60 t Consteel arc furnace + 140 t EAF-150 t AOD flow sheet is adopted. With charging low nickel high phosphorus pig iron in 60 t Consteel arc furnace, its end [ P] is ≤250 x 10-6mixing with 85 t end [ P] 450 x 10-6EAF liquid, the [P] before AOD refining is ≤360 x 10-6. With using new developed process, the tap-to-tap time reduce by 10 ~ 30 min, the phosphorus content in liquid decreases to less than 360 x 10-6from original 450 x 10-6the product quality of stainless-steel increases and the production cost decreases obviously.4|0|0更新时间：2026-01-21
- 摘要：The production practice shows that for production of 0. 20% 〜0. 24% C ultra-low-sulphur steel, in conditions of 150 t EAF charging- 40% metal + quality low sulphur scrap, EAF end [C] 0. 03% ~0. 05%, EAF tapping average [S] 0. 046%, LF initial average [S] 0. 017%, the ≤0. 001% sulphur content in finishing steel is gotten by controlling refining end [O] ≤2. 5 x 10-6end ( FeO + MnO) ≤0. 80%, controlling slag amount no less than 22 kg/t and adding aluminium amount 1. 85 kg/t, and sufficient argon stirring.2|0|0更新时间：2026-01-21
- 摘要：The metallurgical flow sheet for ultra-low temperature steel 9Ni (/% : 0. 03 ~ 0. 05C, 0. 15 〜0. 30Si, 0. 60 ~0. 70Mn, ≤0, 003P, ≤0. 002S, 9. 0 ~9. 5Ni, 0. 02 ~6. 04Al) is 180t hot metal pretreatment-1801 top and bottom combined blown converter-LF-feeding Si-Ca wire-RH-180 ~250 mm slab casting. With controlling [P] ≤0.001 5% by dephosphorizing in ladle during converter tapping, [S] ≤0. 001% by desulphurizing in LF and controlling [Al] 0. 02% ~ 0. 03% by adding Al bullets and feeding Al wire, RH vacuum ≤200 Pa in feeding silicon-calcium wire process before RH process, controlling [N] ≤25 X 10-6and [ H] ≤1. 0 x 10-6in ≤200 Pa vacuum for 20 min during RH refining, using electromagnetic stirring, soft reduction and whole shielding casting process, straightening temperature of slab ≥950℃ by increasing casting speed, and slab cooling in slow cooling pit furnace at 300℃ for 40 h, the [ P] , [ S] , [ H] , [ N] and [0] (/10-6) decrease respectively to 15, 9, 0. 5, 26 and 10, the crack occurring ratio decreases to 0, and the qualified ratio of nondestructive testing is up to 100%.2|0|0更新时间：2026-01-21
- 摘要：The EA4T axle steel (/% ： 0. 22 ~ 0. 29C, 0. 15 ~ 0. 40Si, 0. 50 ~ 0. 80Mn, ≤0. 020P, ≤0. 015S, 0. 90 ~ 1. 20Cr, 0. 15 ~0. 30Mo, ≤0. 06V) is produced by 30 t EBT arc furnace-40 t LF/VD-5 t ingot process and forged by 8MN oil-hydraulic press to 300 mm x300 mm bloom with forging ratio ≥9. Results show that of the EA4T steel, [0] is (12 ~ 15) x 10-6[ H] is (1. 2 ~ 1. 6) x 10-6with quenching at 900 - 920 °C and tempering at 600 ~650 °C, tensile strength Rm721 ~745 N/mm2yield strength ReH463 ~470 N/mm2elongation A519. 0% ~ 19. 5%, longitudinal impact energy 53 ~73 J, transverse impact energy 36 ~41 J, structure is bainite-tempered martensite, and 107cycle fatigue limit is 350 N/mm2.2|0|0更新时间：2026-01-21
- 摘要：The studied steelmaking flow sheet for tyre cord steel is 150 t LD-RH-LF-soft argon blowing-CC process. The plasticity of non-metallic inclusions in steel is controlled by adding deoxidation reagent Si-Mn during LD tapping and adding low basicity top slag during LF refining to carry out steel-slag reaction. Results show that in RH, LF, tundish-bloom procedure, the main inclusions in steel are respectively MnO-Al203-SiO2( RH) , CaO-Al2O3-SiO2(LF) and MnO-Al2O3- SiO2(tundish and bloom) , It is available to control the quantity and size of inclusions in steel and the Al203content in inclusions and to form plastic inclusions by using Si-Mn deoxidation and using SiC diffusion deoxidation, low basicity low A12O3top slag refining, controlling T[ 0] ≤20 x 10-6and [ Als] ≤0.001 3% .关键词：帘线钢;T[O];[Al]s;夹杂物;可塑性2|0|0更新时间：2026-01-21
- 摘要：The test super-high strength weathering steel (/%: 0. 062 〜0. 065C, 0. 29 〜0. 30Si, 1. 23 ~ 1. 27Mn, 0. 49 -0. 52Cr, 0. 19 -0. 20Ni, 0. 29 ~0. 31 Cu, 0 ~0. 20Mo, 0. 035 ~0. 060Nb) is melted by a 50 kg vacuum induction furnace, forged to 60 mm x 60 mm billet, then hot rolled to 4 mm plate in laboratory by finishing rolling pass at 880℃ ， water cooling to 600℃ ，furnace cooling. The effect of Nb and Nb-Mo microalloying on structure and mechanical properties of steel are studied by optical, scanning electron and transmission electron microscope, and universal tensile test machine. Test results show that as compared with 0. 035% Nb steel the grain size of 0. 060% Nb steel is finer, the strength increases by ~70 MPa, but the elongation is the same as that of 0. 035Nb steel as compared with non-added Mo steel (0. 035Nb steel and 0. 060% Nb steel) the M/A phases in 0. 035% Nb-O. 20% Mo steel increase obviously and bainite structure occurs in steel led to increase of tensile strength and decrease of yield-strength ratio and elongation of steel.2|0|0更新时间：2026-01-21
- 摘要：In the light of specific properties of austenitic stainless steel 304 (type Crl8-Ni8) and ferritic stainless steel 430 (type Crl7), a high-chromium ferritic stainless steel TTS433 (/%: 0.010C, 21Cr, 0.40Cu, 0. 25Nb, 0. 20Ti, 0. 012N) has been developed by testing and analyzing the effect of Cr, Cu, Nb, Ti element on properties of iron base alloy material. The corrosion resistance of new developed steel is equal to that of austenitic stainless steel 304 and has better formability and weldability. The ferritic stainless steel TTS443 is an idea material to substitute for austenitic stainless steel 304.关键词：高铬铁素体不锈钢;耐蚀性;成形性;焊接性4|0|0更新时间：2026-01-21
- 摘要：Based on devoiced eutectoid transformation ( DET) principle, the fast spheroidizing annealing process for 4 mm plate of alloy tool steel SKS51 (/% : 0.75 ~0. 85C, 0.20 ~ 0. 50Cr- 1.30 ~2, OONi) produced by CSP line has been tested and studied in laboratory. Results show that with austenizing at 730℃ for lOmin then cooling in furnace to 650 ℃ isothermal-spheroidizing for 120min, the steel gets better sphroidal structure with more uniform-distributing residual carbide particles. As compared with traditional spheroidizing annealing process the fast spheroidizing annealing process can save energy and reduce consumption and increase productivity.关键词：SKS51合金工具钢;快速球化退火;剩余碳化物2|0|0更新时间：2026-01-21
- 摘要：The production process flow sheet for hard wire coil of steel 65C (/% : 0. 62 〜0. 70C, 0. 18 ~ 0. 28Si, 0. 55 ~0. 75Mn) is 120 t converter-LF-170 mm x 170 mm costing billet-rolling by high speed mill. The fracture cause of steel 65 C during ∅6. 5 mm hot rolled coil cold-drawing to ∅1. 85 mm wire has been analyzed by optical microscope and scanning electron microscope. Test results show that the macro-feature of fracture is pencil-tip in shape, and the structure homogeneity at coil cross section is poor； the cracks originate at coarse proeutectoid ferrite and thick-lamellar cementite in center of section ； and the main causes of fracture are low sorbite percentage, existing large block proeutectoid ferrite and central carbon segregation.关键词：Segregation5 C;Hard Wire;Hot-Rolled Coil;Cold Drawing;Pencil-Tip Shaped Fracture;Proeutectoid Ferrite;Central Segregation2|0|0更新时间：2026-01-21
- 摘要：The structure and mechanical properties of 15 mm plate of bridge steel Q690q (/% : 0. 05C, 0. 30Si, 1. 40Mn, 1. lOCu, 0. 50Cr, 0. 80Ni, 0. 07V, 0. 55Mo, weld cold-cracking sensitivity index Pcm≤0. 267) processed by both technology i. e. the thermal-mechanical control rolling process (TMCP) - finishing rolling at 920 ℃ , cooling at finishing temperature 830 T with 12℃ /s to 590 Y , air cooling, and the process of TMCP + quenching at 940 ℃ , tempering at 630 ℃. have been studied. Results show that the main structure of bridge steel Q690q produced by TMCP process consists of granular bainite and minor ferrite, and the structure of steel Q690q produced by TMCP + quenching-tempering treatment is polygonal ferrite and minor cement with yield strength RP0. 2- 845 〜870 MPa, tensile strength Rm-895 ~900 MPa, impact energy at -20 ℃ 153 〜186 J, at -40℃ 141 〜155 J. Due to quenching and tempering treatment the M/A island size and the dislocation density in structure of steel products decrease thereby to get higher strength and better impact toughness of steel Q690q.5|0|0更新时间：2026-01-21
- 摘要：The analysis on elements content in 58 heats stainless steel 1Cr15Ni4Mo3N (/% ： 0. 11 ~0. 16C, 0. 50 〜 1. 25Mn, W0. 70Si, 4. 0 ~5. 0Ni, 14. 5 ~ 15. 5Cr, 2. 3 ~2. 8Mo, 0. 05 ~0. IN) random sampling from φ60 ~90 mm bars are carried out, while the longitudinal mechanical properties of each heat products heat-treated with 1 070 ℃ 1 h, air cooling, 一70℃ 4 h cold treatment then 200℃ 2 h tempering are measured. The regression equations between the chemical composition and the mechanical properties of steel are obtained by statistic regression analysis.关键词：1Cr15Ni4Mo3N不锈钢;化学成分;力学性能;回归方程5|0|0更新时间：2026-01-21
- 摘要：The change of structure and mechanical properties of Nb-Ti microalloying IF steel （/%: 0.006C, 0. 005Si, 0. 15Mn, 0. 008P, 0. 006S, 0. 039Al, 0. 01Nb, 0. 048Ti, 0.003 4N） during cold rolling process from 3. 98 mm hot rolled plate cold rolling to 0. 4 mm sheet （ deformation 40% to 90% ） by a four cold-rolling mill in laboratory has been tested and studied. Results show that with increasing cold-rolling reduction ratio the grains of Nb-Ti microalloying IF steel gradually decrease and flat, and the secondary phase particles are more arranged to orientate rolling direction, and the hardness, yield and tensile strength of steel increase while the elongation of steel decreases. With deformation 75% and 77% the yield strength-tensile strength ratio is lowest, and the comprehensive mechanical properties of steel could be gotten.关键词：Nb-Ti微合金化IF钢;冷轧变形量;组织;第二相粒子;力学性能8|0|0更新时间：2026-01-21
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