最新刊期
卷 40 ， 期 1 ， 2019
- 摘要：The Q690E steel plate for engineering machinery (/% ：0. 10 ~0. 15 C,0. 20 - 0. 40 Si, W0. 015 P, W 0.005 S,0.30 ~ 0. 40 Cr,0. 20 ~ 0. 30 Mo,0. 035 ~ 0. 045 V,0. 01 ~ 0. 02 Ti,0. 001 ~ 0. 002 B) has been developed through low carbon and a “Mn-Cr-Mo-B-V-Ti” microalloyed components design, rolling and heat treatment technology selecting. The microstructure of Q690E steel plate guenched at 880 ~910 ℃ + tempered at 570 ~610 ℃ is tempered sorbite with yield strength 811 ~ 891 MPa,tensile strength is 852 -938 MPa and - 40 ℃ impact energy 132 ~ 167J. It ean meet the requirements of GB/T16270-2009 on mechanical properties for Q690E Steel. The result is that, while meeting the increasingly stringent requirements of users,the production costs are reduced.关键词：低成本;调质;热处理;力学性能2|0|0更新时间：2026-01-21
- 摘要：Hot compression deformation of steel wheel CL70 with strain rate 0. 01 ~ 10 s-1at 900 ~ 1300 ℃ has been tested and studied by using Gleeble-3800 thermo-mechanical simulator to analyze in hot deformation of the steel the relation between flow stress, strain rate and deformation temperature and get the flow stress constitutive equation. Results show that the flow stress increases of with the increase strain rates and decreases of temperature, and as the strain rate is less than 1 s-1the feature of dynamic recrystallization occurs obviously on flow stress curves of steel CL70. The hot deform activation energy of steel CL70 is 401.06 kJ/moL2|0|0更新时间：2026-01-21
- 摘要：In light of the structure and technics parameters of the three-strand 220 mm X 220 mm square billet continuous casting tundish in TISCO, fluid flow field and temperature field of the tundish are mathematically simulated with the software ANSYS FLUENT. The results show that the flow of prototype tundish is unreasonable, the short circuit flow and the dead zone exist in the No. 2 strand, and the similarity among the various stands is poor. The optimization schemes have formed weirs in the pouring area to form flow buffer zones. Thus the steel flow is redistributed. The flow field consistency has been greatly improved. After the optimal schema was applied to the site, the number of inclusions in the No. 1 and the No. 2 strand was reduced by 9.51% and 23.52% respectively, and the difference between strands was reduced by 52. 72%. The number of inclusions and the difference between strands were significantly reduced.2|0|0更新时间：2026-01-21
- 摘要：Double-pass compression experiment with different interval time was designed to simulate the deformation process of 5% Ni cryogenic steel 07Ni5DR under the hot-rolling procedure. The static softening rate was calculated based on the stress-strain curves of the tested steel. In addition, the kinetic process of static recrystallization was analyzed to offer experimental and theoretical guidance for reasonably planning the rolling technology. Results indicate that the softening rate of the tested steel increased with the increase of deformation temperature and interval time. The activation energy of static recrystallization for the 5%Ni cryogenic steel was calculated to 233.97 kj/mol. Furthermore, the kinetic equation of the static recrystallization for the 5%Ni cryogenic steel was established.2|0|0更新时间：2026-01-21
- 摘要：The yield strength 750 MPa high strength low alloy (HSLA) steel for container (/% : 0.06 ~0.09C, 0.25 ~0.35Si, 1.60 ~1.80Mn, ≤0.015P, ≤0.003S, 0.10 ~0.20Mo, 0.05 ~0.06Nb, 0.09 ~0.llTi, ≥ 0.0015Ca, ≥0.015Alt) has been designed and developed. The process flowsheet for tested steel is 260 t BOF-LF-RH-230 mm slab casting-hot-rolling to 2 ~ 6 mm plate. With the process measures including Nb-Ti compound microalloying and Ca treatment, controlling finishing rolling temperature 840 -880 ℃, lamina flow cooling rate ≥ 60℃ /S, coiling at 520 -580℃ , and hot-rolled coil cooling rate ≤ 10 °C/h， the hot-rolled strip coil has better surface quality, its structure is fine grain ferrite + Nb-Ti carbonitride, and the mechanical properties of strip are upper yield strength 760 〜790 MPa, tensile strength 860 -910 MPa, and elongation 21% ~25% to meet the requirement of user.关键词：屈服强度750 MPa低合金高强度钢;集装箱用钢;表面质量;开发2|0|0更新时间：2026-01-21
- 摘要：The pilot production flow sheet of the 350 km/h Chinese Standard EMU DZ2 Axle Steel (/% ：0.24 ~ 0.32C, 0.20 ~0.40Si, 0.60 ~0. 90Mn, 0. 90 〜1.20Cr, 0. 50 ~ 1.50Ni,0.20 ~ 0. 30Mo, ≤ 0. 010P, ≤ 0. 010S) 250 mm x 250 mm is 80 t EBT EAF-LF-VD-8.4 t ingot casting-rolling mill practice. With the process measures including electric arc furnace hot charging >80% pre-treating hot metal, EBT electric arc furnace controlling end [P] ≤ 0. 006% and [C] > 0. 10% ,10% heel liquid in tapping,refining of with LF high basicity slag( CaO)/( SiO2) =9~12 and white slag hour with twenty minute upwards,after VD process feeding 1. 0 kg/t Si-Ca wire and argon shielding ingot casting, the cleanliness of produced steel DZ2 is [O] ≤ 10x 10-6[ H]≤ 1. 0 x 10-6P≤ 0.008% ,S ≤ 0.005% ,and inclusion rating of A,B,C,D and Ds series<1.0,the technical indexes of bloom and axle of steel DZ2 all meet TJ/CL520-2016《 Tentative specifications of DZ2 EMU Axle》,bloom and axle is past the step-up judging of the railway head office organizational, and finished 6 X 105km handle examine test.2|0|0更新时间：2026-01-21
- 摘要：For the diffecrent degress surface crack occur in the prodution of steel 12CrlMoV,it was confirmed by metallographic microscope and scanning electron microscope that cracks in the rolled material were caused by cracks in the cast billet. Based on the analysis of the causes of the cracks ,it is concluded that the cleanliness of molten steel, the nitrogen content of molten steel and the steel shielding slag in mould are the main reasons for the cracks. Improve the cleanliness of molten steel by controlling the terminal carbon of the electric furnace, optimizing the refining slag system and treating the deoxygenation products with calcification, controlling the nitride precipitation on the surface of the billet, ensuring the N content of steel < 0.007% ,and using pipe billet steel shielding slag, the surface crack defect rate of 12CrlMoV steel decreased from 1.6% to 0.3%.2|0|0更新时间：2026-01-21
- 摘要：It was studied the quality of carbide, non-metallic inclusions and composition change of sulfur bearing M35 high speed steel (0. 015% ~ 0.030 S) using acid slag remelting in atmospheric conditions using the 1 t double electrode furnace. When the acid slag was remelting,the sulfur,silicon,manganese,chromium have a large difference between the two ends of the ingot, the difference reduced using the method of adding calcium sulfide when slag melting and adding manganese iron when Slag dump. The quality level of carbide nonuniformity granularity of sulfur bearing M35 high speed steel mill bar is similar to that of conventional alkaline slag,non-metallic inclusions class A is less than 1.5 ,B, C and D, which are less than or equal to 1.0.2|0|0更新时间：2026-01-21
- 摘要：The metallurgical production flowsheet of copper-clad steel 6A (/% : 0.03 ~ 0.06C, 0.02 ~ 0.05Si, 0.15 ~0. 25Mn, ≤0.015P, ≤ 0.015S, 0.02 ~0.05Al) is hot metal desulphurization- 120 t BOF-LF-140 mm x 140 mm billet casting-continuous rolling to Φ6.5 mm coil- annealing. The breaking wire of copper-clad steel 6A during cold-drawing process from Φ6.5 mm cold-drawing to Φ0.45 mm wire has been analyzed by scanning electron microscope. Results show that there are coarse spheroidized cementite clusters at center line near the fracture of Φ0. 45 mm wire. During cold-drawing process due to the hardness of pearlite higher than that of ferrite, the fine cavities initiate at tip of pearlite and with increasing drawing passes the cavities evolve as transverse ℃- shape cracks finally led to wire breaking. With decreasing carbon and manganese content in steel respectively from 0. 05% and 0.23% to 0.03% and 0.17% , decreasing overheating extent of liquid in tundish from 35 ℃ to 25 ℃ and optimizing electromagnetic stirring parameters from 250M, 1. 2 Hz to 400 A, 1. 2 Hz, the phenomenon of pearlite clusters at coil center is improved and the cold-drawing wire broking ratio decreases from 1. 0 times per ton steel to 0. 2 times per ton steel.2|0|0更新时间：2026-01-21
- 摘要：According to GB/T 1499. 2-2018 standard, the internal controlled composition of Φ36 - 40 mm HRB500E rebar is designed as (% ) 0.22 ~0.25C,0.60 ~0.70Si, 1.50 ~ 1.60Mn, 0.11 ~0.13V,P≤ 0.045 ,S≤ 0.045 in shuigang. The productive process such as steelmaking in l00t top and bottom combined blown converter- tapping with slag stopping-deoxidization and alloying-LF refining-continuous casting of 160 billet-reheating of billet -rolling of rebar-air cooling is used. The mechanical properties of Φ 36 mm HRB500E rebar are as follows: yield strength ReL0540 -580 MPa, tensile strength Rm0705 ~ 735 MPa, percentage elongation after fracture A 15.5% 〜20.5% , total elongation at maximum force Agt11.5% ~14.0%,the ratio of actual measured tensile strength to actual measured yield strength Rm0/ReL0is 1.25 ~ 1. 32, the ration of actual measured yield to yield strength stipulated in GB/T 1499. 2-2018 ReL0/ReL0is 1.08 〜1.16, therefore, mechanical properties of the rebar meet requirements of GB/T 1499.2-2018 standard. The microstructure of Φ40 mm HRB500E rebar produced is ferrite and pearite, its grain size is 9.5 ~ 10 grade.2|0|0更新时间：2026-01-21
- 摘要：The industrial experiment of direct alloying by manganite self-reducing briquettes was carried out in 100 t top botton combined converter, and the steel and slag were sampled and analyzed during smelting. The results show that the average yield of manganese is 65.17% ,but it fluctuates greatly when the manganite ore self-reducing briquettes was added in the converter. Improving the end point of [C] , reducing the amount of slag and reducing the oxidation of slag can effectively improve the yield of manganese. When the adding amount of the briquettes was 15 kg/t, the average temperature drop 18 ℃. ,and that will not affect the normal smelting of the converter.关键词：100t顶底复吹转炉;直接合金化;锰矿压块;自还原;SS400钢6|0|0更新时间：2026-01-21
- 摘要：The production process flowsheet of steel C38N2 (/% : 0. 36 〜0.40C, 0. 50 ~0. 65Si, 1.40 ~ 1. 55Mn, ≤ 0.025P, 0.010 ~0.040S, 0. 10 ~0,25Cr, ≤ 0.01A1, 0.015 ~0.020N) is 120 t-BOF-LF-RH-410 mm x 530 mm bloom casting-continuous rolling to Φ170 mm products. The statistics of effect of refining slag basicity (2. 0 ~ 2. 5 ) , Ca content in finished steel (0 ~ 0.075%), tundish shielding agent basicity (5. 94 and 1.70), secondary cooling water (0. 14 ~0. 24 L/kg) and mould electromagnetic stirring current (250 A and 100 A) on sulfide in steel has been analyzed. With process measures including using 2 ~3 low basicity slag .in refining, controlling [ Ca]/[ S]>0. 03 , using tundish shielding agent basicity 1. 70, secondary cooling water rate 0. 24 L/kg and mould electromagnetic stirring current 100 A, the ratio of rating ≤2. 5 of A-thin series sulfide in steel increases from 80% before process improvement to 95% , and the fine, dispersed distributed spheroidal and spindle-shaped sulfide in steel increases markedly.关键词：含硫易切削钢C38N2;MnS;钙处理;形态控制;二冷水;结晶器电磁搅拌2|0|0更新时间：2026-01-21
- 摘要：In order to control structure non-uniformity and carbide segregation of high speed steel ingot, ingots of small size are usually produced by ESR, but its production efficiency is low, the rate of finished product is low. Long electrosiag billets with small specifications for ESR fest Withdrawing can improve production efficiency and finished product rate, we made 160 mm x 160 mm square billet of M2 high speed steel using T-type conductive crystallizer for ESR fast Withdrawing with different melting speed and forged and rolled, through the detection and analysis of the composition, low magnification, cast structure and carbide irregularity of the electroslag billet and the size of large particles of carbide, mean¬while ,it is compared and analyzed with Φ 220 mm ingot rolling for conventional ESR, analysis shows that electroslag billet for ESR fast Withdrawing with 400 kg/h remelting speed has stable composition and good macrostructure, the carbide variability and carbide dimensions of large particles of rolled materials produced are similar to those Φ 220 ingot rolling materials for conventional ESR, and the production efficiency and the rate of finished products have been improved obviously.2|0|0更新时间：2026-01-21
- 摘要：Ferrotitanium and ferrotitanium cored wire are always used for Ti alloying in micro alloy steelmaking, practices and thermodynamics analysis proved that there are Ti loss since the Ti oxidation, and Al in steel could increase the Ti yield. Analyses of 48 heats were taken to test the Ti alloying of 2 different steel grades with 2 alloying ways and different process route- EAF and BOF. Ti yield of all heats was in range of 72. 66% ~ 87. 17%. The yield of steel grade ( steel grade II ,0. 05%Ti) with a higher Ti content (79. 84% ~ 84. 66% ) was higher than that with a lower Ti content (steel grade I ,0. 02%Ti) (72, 66% ~87. 17% ). Ti yield of ferrotitanium alloying was 67. 34% ~72.76% , and lower the tap¬ping steel oxidability could reduce the Ti losses. The Ti yield of ferrotitanium cored wire feeding was 78. 62% ~ 85. 12% , and Ti yield with the combination of ferrotitanium and wire feeding alloying process (83. 49% ~85. 12% ) was higher than that with only wire feeding (78. 62% ~79. 54% ) since the Ti oxidation in top slag after feirotitanium alloying could inhibit the Ti oxidation during the wire feeding process. The Ti in slag could be reduced during the vacuum process, Ti yield of VD process (28. 05% -44. 04% ) was higher than that in the RH process (< 4% ) since it have a better Ti reduction kinetic condition. The only wire feeding on LF refining process plus VD process was the most economical method of the Ti alloying for both steel grades I and H .关键词：钛微合金钢;钛合金化;工艺路线;EAF-LF-VD, BOF-LF-RH;收得率2|0|0更新时间：2026-01-21
- 摘要：With the process measures including using low titanium hot metal, alloys and slagging materials, eccentric bottom tapping and alloying in tapping in EAF steelmaking, using Si-Al compound deoxidation and CaO-MgO-SiO2-Al2O3slag series with basicity 3 ~5 in LF refining,30 Pa VD treatment and shielding casting,the analysis results of Φ150 mm forged bar are oxygen content in GCrl5 bearing steel being 4.5 X 10-6~9 x 10-6,Ti content 0.0010% ~0.0015% with minor 5 μm TiN inclusions to meet the quality requirement for super grade quality low titanium bearing steel.2|0|0更新时间：2026-01-21
- 摘要：The impacted and tensile-fractured specimen of 316H steel medium plate was analysised by SEM, the result was showed that the morphology of fractured specimen with lower impact energy and yield strength of 316H medium plate was brittle fracture because of σ precipitation phase in the middle of plate, which decreased the plasticity and toughness of steel. The formed link of a phase was found out in process of rolling and heat treatment, and then the cooling rate after rolling, heating rate, holding temperature, holding time in process of heat treatment were adjusted, the ct phase was not precipitated in any position in the plate, the mechanical property of plate in every place of 316H medium plate is qualified.关键词：316H不锈钢;热处理工艺;力学性能;析出相5|0|0更新时间：2026-01-21
- 摘要：The microstructure and property of the coarse grained heat affected zone( CGHAZ) of 960QT steel was studied under t8/5by using thermal simulation technology, and the continuous cooling transformation curve of the heat affected zone(SH-CCT diagram)was acquired. The results show that, the microstructure of the CGHAZ consists of lath martensite and the hardness values change little as t8/5is 3 - 6 s. When t8/5= 10 s, lath bainite appears. With increase of t8/5the lath martensite reduces and lath bainite increases, and the microhardness of CGHAZ gradually reduct. When t8/5reaches 150 s, granular bainite in structure is found the microhardness is further reduced. As t8/5> 600 s, the CGHAZ mainly consists of granular bainite. Based on the measured heat affected zone 5, the relationship between tg/5 values and heat input E of steel 960QT is established. As t8/5is 30 s, the microhardness of CGHAZ (325 HV1) is equal to the base metal(330 HV1). So the heat input should be controlled to ensure that t8/5is less than 30 s. Under non-preheating conditions, the heat input should be less than 1.4 kj/mm.2|0|0更新时间：2026-01-21
- 摘要：The tested stainless steel 17-4PH (/% : 0.02 ~ 0. 03C, 0.40 ~ 0.50Si, 0.41 ~0. 60Mn, 0.018 ~ 0. 026P, 0. 001S, 15. 56 ~ 15.75Cr, 4. 31 ~ 4. 50Ni, 3. 21 ~ 3.40Cu, 0. 20 ~ 0.25Nb, 0. 013 〜0. 067N) is melted by 20 t EAF + LF + VOD + ESR process and forged to Φ150 mm bar products. Test results show that with increasing N content in steel from 0, 013% to 0. 067% , the ferrite content in steel increases from 0. 5% to 6% , the strength and hardness of steel increase and the plasticity of steel decreases. As to control the N content in steel 0. 020% ~0. 045% , the ferrite content in steel is 1% 〜3% and the mechanical properties of steel quenched at 1040 ℃ for 1 h, water cooling + 480 °C for 2 h, air cooling, the mechanical properties of test steel are qualified; and the HB hardness value of so Ed-solution-treated steel is ≤325, so the workability of steel is improved.2|0|0更新时间：2026-01-21
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