最新刊期
卷 37 ， 期 4 ， 2016
- 摘要：The limestone is calcined by an electric resistance furnace at 1 150 ~ 1 250 龙 to manufacture quickened lime for test. The activity of lime is measured according to standard ZBQ27002-85, and the beginning melting temperature, hemisphere temperature, flow property temperature, and the differential scanning calorimetry ( DSC) curves of samples of mixed lime and blast furnace slag are determined by the melting-point-rate apparatus and the high temperature synthetic thermal analyzer. Results show that with heating at 1 150 X. for 2 h the activity of lime is highest that is 417 mL； as the basicity (CaO/SiO2) is constant, with increasing the activity of lime the beginning melting temperature, hemisphere temperature and flow property temperature of mixed furnace slag decrease; as the activity of lime is constant with increasing the basicity the beginning melting temperature, hemisphere temperature and flow property temperature of mixed furnace slag first decrease then increase； with increasing the activity of lime, the endothermic peak of formed 2CaO·SiO2and the exothermic peak of formed 3 CaO·SiO2occur at lower temperature. With simulated calculation by using Factsage software the results are in accord with experimental results.关键词：活性石灰;造渣;焰化温度;2CaO - SiO2;3CaO . SiO2;FactSage软件;扫描量热法2|0|0更新时间：2026-01-21
- 摘要：The mathematical model for heat transfer of pipe line steel X80 (/% : 0. 04C, 1. 85Mn, 0. 25Si, 0. 006P, 0. 003S, 0. 30Ni, 0. 21Mo, 0. 06Nb, 0. 02V) 238 mm x 1 650 mm slab at vertical direction of strand has been established by two-dimensional cutting slice tracing slab solidification heat transfer method, and the calculation for change of shell thickness and temperature field of pipe line steel X80 slab during casting is carried out by ANSYS soft ware. It is obtained that with casting speed 1. 2 m/min the shell thickness of slab at out of mold is 18. 14 mm and the slab liquid core length is 22. 58 m. The relative error of solidification shell thickness between calculated data and measured data is ≤ 2. 5% , and that of terminal position of solidification is 0. 68%. The effect of superheating extent (25 - 55 °C ) , casting speed ( 1. 2 -1. 3 m/min) and secondary cooling water rate (79. 2 -96. 8 m3/h) on temperature at each point of cutting slice and terminal position of solidification is analyzed. The results show that with increasing casting speed and reducing secondary cooling water rate the slab surface temperature drops slowly, the terminal position of solidification distance from mold is farther and the solidification time is longer. The optimum process parameters for casting slab of pipe line steel X80 are superheating extent 35 ℃,casting speed 1. 2 m/min and secondary cooling water rate 88 m3/h.关键词：X80管线钢;238 mm X 1 650 mm板坯, 连铸;温度场, 坯壳厚度;凝固末端3|0|0更新时间：2026-01-21
- 摘要：The effect of number ( 1〜4) and distribution of bottom blown porous bricks of 100 t top-bottom combined blown converter at steel works on flow field of liquid and mixing time has been studied by using Fluent software for fluid. Results show that with different number and configuration of bottom blown porous bricks the flow conditions and stirring results are different. With gross bottom gas flow rate 100 m3/h, the liquid mixing time of liquid with single porous brick is longest, i. e. 380 s, the mixing time of liquid with double porous bricks located asymmetrically on the cross at furnace bottom is shortest that is 204 s, while the flowing configuration is planar-symmetrical distribution of 4 bottom porous bricks with liquid mixing time 255 s.2|0|0更新时间：2026-01-21
- 摘要：A method to calculate the heat transfer coefficient is proposed by using finite element software combined with experimental calculation that is based on measured temperature curves, carrying out the nonlinear coupling on various factors which have influence on the heat transfer coefficient of U75V rail steel (/% : 0. 74C, 0. 76Si, 0. 82Mn, 0. 014P, 0. 028S, 0. 071V) , the geometric model of the heat transfer coefficient of steel in quenching process is established and the heat transfer coefficient is obtained by iterative program of calculated heat transfer coefficient prepared with Python language. Using calculated heat transfer coefficient as a known boundary conditions, the simulation on temperature field of rail spray quenching coupled with phase transition in the DEFORM-3 D is carried out. The simulated-calculation cooling-curve corresponds to the measured cooling curve.5|0|0更新时间：2026-01-21
- 摘要：The flowsheet for steelmaking of 280 mm x 325 mm casting bloom of steel 55SiCr (/% : 0.55C, 1. 42Si, 0. 67Mn, 0. 008S, 0. 67Cr) is 80 t BOF-LF-RH-CC process. With during BOF tapping adding Al, ferrosilicon and refining slag, controlling slag basicity R (CaO/SiO2) about 2. 0, RH refining for ≥ 20 min, soft blowing stirring for ≥15 min to control the transformation of inclusions in steel, the clean spring steel 55SiCr is gotten. Analysis results show that during LF refining process the inclusions in liquid transformfrom earlier period Al3O3-SiO2-MnO and Al2O3inclusions to inclusion Al2O3-CaO-SiO2after RH vacuum treatment the inclusions in liquid all transform to inclusion Al2O3-CaO-SiO2the T[0] and [N] at beginning LF refining are respectively 36 x 10-6and 26 x 10-6and the T[0] and [N] in casting bloom are respectively 7 x 10-6and 43 x 10-6and the inclusions in casting bloom are mainly Al2O3-CaO-SiO3and Al2O3with size≤10μm3|0|0更新时间：2026-01-21
- 摘要：The effect of ternary slag (/% : 65CaF225Al2O35SiO2) , quaternary slag (/% : 55CaF220Al20320SiO25CaO) and quinary slag (/% : 45CaF220Al2O325SiO25CaO, 5MgO) on metallurgical quality of electro-slag ingot of S-Pb-Te free cutting stainless steel (/% : 19 -21Cr, 1.5 -2. 5Mo, 0. 1 -0. 3Pb,0. 25 -0. 40S,0. 03 -0. 10Te) has been tested and studied by 500 kg shielding atmosphere electro-slag remelting ( ESR) furnace. Results show that the yield of S in steel remelting by quaternary slag and quinary slag is higher than that by ternary slag ； the yield of Pb remelting by ternary slag is relative higher； the yield of Te remelting by three kind of slag series is no-obvious difference； with SiO2content in steel remelting by quinary slag is 25. 0% the deviation of S, Pb and Te content in S-Pb-Te free cutting stainless steel ESR ingot from top to bottom is minimum, that are respectively AS 0. 03% , APb 0. 02% and ATe 0. 028% , and the surface quality of electro-slag ingot is best.2|0|0更新时间：2026-01-21
- 摘要：The production flowsheet of ø9~ ø12 mm wire rod o£ spring steel 60Si2MnA is 100 t BOF-LF-VD-150 mm x 150 mm billet casting-high speed wire rolling process. The decarburization mechanism is discussed and the effective factors on decarburization are analyzed. With the process measures including suitable decreasing the temperature of second heating zone and rising the temperature of soaking zone, decreasing the total heating time of billet from 2. 7 h to 1. 5 h, controlling oxygen content in furnace being 3% ~ 5% , decreasing beginning rolling temperature and finishing rolling temperature respectively from (1 000 ± 20 )℃ and (850 ± 20 ) ℃to ( 950 ± 20)℃and ( 820 ± 20 )℃ ,reducing the wind cooling time for wire rod at temperature more than 727 X. , the full ferrite decarburization layer of wire rod of spring steel 60Si2MnA decreases from 0. 072 mm to 0, the total decarburization layer decreases from 0. 142 mm to 0. 063 mm, and the fatigue life of spring increases from 17. 7 x 104to 23. 2 x 104.3|0|0更新时间：2026-01-21
- 摘要：With microalloying composition design, intermediate test： 2 t medium frequency furnace-680 kg ingot forging and rolling-φ94 mm x5. 2 mm shell-cold drawn to φ89 mm x 5 mm tube-normalizing at 880°C , and commercial production: 50 t EBT EAF-LF-VD-210 mm x280 mm billet casting- rolled to φ 75 mm tube stock- piercing to φ 75 mm x 5. 5 mm shell- cold drawing to φ70. 2 mm x 5. 05 mm- tube-normalizing at 880 〜890 ℃. , the XGZT850 high strength toughness non-quenched-tempered drill steel tube (/% : 0. 35 ~0. 41C, 0.20 - 0.40Si, 1.40 ~ 1.70Mn, ≤O. 010P, ≤ 0.010S, 0.40 ~0. 60Mo, 0. 04 ~0. 10V, 0.03 ~0.05Ti) is successfully developed. Examination results show that of steel tube the tensile strength is 1 029 MPa, yield strength is 931 MPa and the elongation is 13.5% ; the structure of steel tube is fine and uniform granular bainite ； and the tensile fracture has the characteristic of ductile fracture, and the impact fracture is quasi-cleavage + ductile fracture. The properties of high strength-toughness non-quenched-tempered drill steel tube meet the requirement of user.关键词：微合金化;高强韧性;非调质XGZT85O钻探钢管;研制2|0|0更新时间：2026-01-21
- 摘要：The metallurgical flowsheet for developed cold heading steel QB3O wire-rod (/% ： 0. 27 〜0. 32C,≤0. 20Si, 0. 90 ~ 1. lOMn,≤0. 020P,≤ 0. 020S) is hot metal pre-desulphurization- 80 t BOF- LF- RH vacuum degassing- 4 strands 280 mm x 325 mm bloom casting- stacking cooling- blooming- grinding- high speed wire rolling process. With the process measures including using BOF high catch carbon reblow practice, controlling BOF end [C] 0. 07% ~0. 15% and [P]≤ 0. 013% , hot metal [P] ≤0. 095% and [S]≤ 0. 03% , controlling LF refining slag basicity R = 4~10 and (FeO + MnO) ≤l. 0% , and RH vacuum ≤90 Pa, of φ18 mm wire coil of steel QB30 the tensile strength is 591 MPa, elongation is 29% and reduction of area is 60% , the nitrogen content and total oxygen content in steel respectively are 0.004 0% and 0.001 8% , and the rating of non-metal inclusions in steel is 0 ~ 1. 5 to meet the requirement of user.关键词：高强度冷镦钢QB30;盘条;研发;工艺控制4|0|0更新时间：2026-01-21
- 摘要：The 325 mm x 280 mm electrode of superalloy 825 ( /%： < 0. 01C, 0. 21 Si, 0. 40Mn, 0. 020P,0. 003S, 22. 5Cr, 39. INi, 3. 0Mo, 2. ICu, 1. 17Ti, 0. 17Al) is remelted by protective gas drawing-type electroslag rapidremelting to 160 mm x 160 mm 1. 8 t ingot. Effect of adding TiO2TiO2-MgO or TiO2-SiO2in base slag CaF2-CaO-Al2O3and remelting rate (300 ~500 kg/h) on the surface quality and Ti loss of alloy 825 remelted ingot is tested and studied. Results show that by quinary slag series CaF2-CaO-Al2O3-TiO2-SiO2adding small amount SiO2with remelting rate 400 k／h, the surface quality of electro-slag remelting ingot of alloy 825 improves obviously while the Ti loss is prevented.2|0|0更新时间：2026-01-21
- 摘要：The critical points and continuous cooling transformation curves of steel 14CrlMoR (/% ：0. 01C, 0. 66Si,0. 80Mn, 0. 006P, 0. 003S, 1.72Cr, 0.31 Mo, 0. 01 Nb) are measured by dilatometer, and the effect of cooling rate on structure and microhardness of test steel is studied. Results show that with cooling rate 0. 1 ~ 1℃ /s the transformed structure of tested steel is ferrite and pearlite； with 2 ~5℃ /s the tested steel obtains mixed structure of ferrite, pearlite and minor granular bainite； with 10℃/s the structure of test steel is ferrite and granular bainite； with 15 ~20℃/s the structure is lath bainite ；and with 25 ~5℃/s the steel gets the mixed structure of lath bainite and martensite.4|0|0更新时间：2026-01-21
- 摘要：The test and analysis on φ26 mm round products rolled from 2. 3 t bearing steel GCH5 electroslag ingot remelting with (/% ) : 45CaF2l0CaO, 40Al2O35MgO slag series are carried out. Results show that after electroslag remelting (ESR) the burning loss of Al and Si and oxygen content increase in top of ingot are larger that that increase in bottom of ingot, the Si, Alt and 0 content in electrode, top and bottom are respectively (/%) 0. 24, 0. 16, 0. 21 ； 0. 025, 0. 011, 0. 017 and 0. 001 0 , 0.003 0 , 0.002 0. The inclusions in steel are mainly Al203Mg-Al-0 and Ca-Al-0 with minor TiN and compound inclusion with Mg-Al-0 core cladding by TiN ； and the per mm2inclusions number in top ingot is 16. 49 and that in bottom ingot is 14. 96; the main inclusion in top of ingot is Al2O3while that in bottom of ingot is Mg-Al- 0 and Ca-Al-0, the main cause is the Al content in bottom of ingot is higher to increase the reduction of MgO and CaO in slag.2|0|0更新时间：2026-01-21
- 摘要：The liquid melted in a medium frequency induction furnace by parent metal of bearing steel GCrl5 through a guided tube enters in spraying room and the metal strand is sprayed by inert gas to liquid droplet with micrometer size and deposited at collector to form a deposited billet with diameter 130. 28mm and center thickness 40. 84 mm (/% : 1. 01C, 0. 23Si, 0. 29Mn, 1.48Cr,≤ O. 027P,≤0. 020S). The test of heat treatment of 1/4 deposited billet is carried out in a box electric resistance furnace. Results show that the structure of spraying formed bearing steel GCrl5 is refined structure of equiaxial crystal and fine carbide with low alloy elements segregation ； the hardness o£ sample quenched at 860 °C and tempered at 160 T is highest that is HRC 61 with optimum structure and properties.关键词：喷射成形;GCrl5轴承钢;组织;淬火回火;硬度2|0|0更新时间：2026-01-21
- 摘要：Corrosion-resisting properties of maraging stainless steel 00Crl3Ni7Co5Mo4W (/% : 0. 007C, 13. 23 Cr, 7. 02Ni, 5. 06Co, 3. 72Mo, 0. 96W) melted by 50 kg VIM and solid-solution treated at 1 100 °C for 1 h + aged at 450 ~ 510 fbr 8 h are studied by using potentiodynamic polarization curves and uniform corrosion immersion test, and the structure of maraging stainless steel is observed and analyzed by optical microscope, TEM and X-ray diffraction. Results show that with increasing ageing temperature, the R precipitated phase increases led to decrease of pitting corrosion resistance in steel, while the amount of austenite reversed-transformed into martensite increases it is available to improve the corrosion resisting properties of the steel. The optimum heat treatment process for the maraging stainless steel 00Crl3Ni7Co5Mo4W is solid-solution treating at 1 100℃ for 1 h + ageing at 470℃ for 8 h, its corrosion rate is 1.259 0 μm/a and pitting corrosion potential is 252 mV.关键词：00Crl3Ni7Co5Mo4W马氏体时效不锈钢;时效;组织;点腐蚀;极化曲线5|0|0更新时间：2026-01-21
- 摘要：The tested spring steel 65Si2CrV (/% : 0. 66C, 1. 43Si, 0. 74Mn, 0. 007P, 0. 008S, 0. 68Cr, 0. 11V) is melted by 25 kg vacuum induction fumace and rolled to 16 mm x300 mm slab. The static continuous cooling transformation (CCT) curves of spring steel 65Si2CrV is obtained by Gleeble-2000 thermal simulation testing machine using dilatometry combined with metallographic analysis and microhardness test, and the phase temperature of steel cooled with 0. 2 ~ 10 °C/ s is gotten, as cooling rate increases from 1°C/s to 5 °C/s the HV10 microhardness value of steel dramatically increases from 380 to 800.关键词：弹簧钢65Si2CrV;连续冷却转变曲线;组织;显微硬度2|0|0更新时间：2026-01-21
- 摘要：The sheet of Hi-B high magnetic induction oriented silicon steel (/% : 0. 07C, 3. 02Si, 0. 13Mn, 0. 020P, 0. 006S, 0. 21Cu, 0. 025Cr, 0. 016A1, 0. 004Sn) is produced by simulating CSP process in laboratory, the steel is melted by a 25 kg vacuum induction furnace, cast to 41 mm x 120 mm slab, hot-rolled to 2 mm plate, normalized at 1 120℃ and cold rolled to 0. 27 mm sheet. The effect of annealing at 830 ~ 870℃ for 3 ~ 7 min on recrystallized structure and texture of steel has been studied. Results show that the suitable annealing process for 0. 27 mm sheet of Cu-bearing Hi- B high magnetic induction oriented silicon steel is at 850℃ for 5 min, its average grain size is 15. 6 μm, the relative level of adverse texture [111] 〈110〉and {001}〈111〉 is lower and the distribution of favorable texture {111} 〈112〉is reasonable that is available to form favorable Goss texture in secondary recrystallization annealing process.关键词：含Cu Hi-B高磁感取向硅钢;模拟CSP工艺;初次再结晶退火;组织;织构5|0|0更新时间：2026-01-21
- 摘要：Tested 0.5 ~0.7Cr steel for bucket blade (/% : 0.22 ~ 0.30C, 0.25 ~ 0.45Si, 0.95~1.20Mn, 0.006 ~ 0.009P, 0.008 ~0.010S, 0.5 ~0. 7Cr, 0.015 ~0. 065Nb, 0 ~ 0. 040Ti) is melted by a 50 kg vacuum induction furnace and hot-rolled to 16mm plate with finished rolling temperature 850 ~ 900 °C , air cooling. The effect of Nb-Ti content (0. 015Nb, 0. 035Nb-0. OlOTi and 0. 065Nb-0. 040Ti) on structure and mechanical properties of hot-rolled steel for bucket blade has been studied by optical, scanning electron and transmission electron microscope and mechanical properties examination. Results show that the structure of tested steel is ferrite + pearlite ； with increasing Nb-Ti content in steel, the grain in steel plate is fined, the lamellar spacing of pearlite decreases and the amount of precipitates of (Nb, Ti) C and ( Nb, Ti) (C, N) and the strength increase； and the mechanical properties of steel plate containing 0. 065Nb-0. 040Ti is yield strength 632 MPa, tensile strength 916 MPa, elongation 17.7% , impact energy KAV40 J and HB hardness value 234.2|0|0更新时间：2026-01-21
- 摘要：The tested steel 1 ~2Crl3Mn9Ni4 with different nitrogen content (/% : 0. 08 ~0. 18C, 0. 17 ~0. 34Si, 8. 11 ~9. 27Mn, 0. 008 ~0. 028P, 0. 007 ~0. 032S, 12. 57 ~ 13. 34Cr, 4.05 ~4. 65Ni, 0 ~0. 34N) is melted by a 25 kg vacuum induction furnace adding chromium nitride in atmosphere or argon atmosphere. The test steel is forged and rolled to 0. 8 mm strip then cold-rolled with 0 ~45% deformation. The effect of cold-rolled deformation and nitrogen content on structure, mechanical properties and corrosion resistance of steel has been tested and studied. Results show that the strength and plasticity of steel Crl3Mn9Ni4 are improved by decreasing carbon content and adding suitable nitrogen in steel ； the cold-rolled deformed steel in sensitizing condition has some tendency to grain-boundary corrosion in varying degrees ；the nitrogen is available to increase the stability of phase composition in metastable austenite stainless steel; and the nitrogen contributes to passivating of metastable austenite stainless steel non-bearing stabilizing elements in SO42- medium and increases the corrosion resistance of steel in non-sensitized condition, and it obviously increases the pitting corrosion resistance in Cl-medium.2|0|0更新时间：2026-01-21
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