最新刊期
卷 42 ， 期 3 ， 2021
- 摘要：Based on the prototype of 30 t tundish in a steelworks a " belly" induction heating tundish with single channel to reduce the erosion of the wall of tundish has been designed. The flow behavior of liquid steel of the " belly" induction heating tundish is studied by numerical simulation method, and the influence of the volume of the front cavity on the flow state of liquid steel is investigated. The results show that "belly'' can significantly reduce the erosion of the wall of tundish posterior cavity, the average residence time of the " belly" tundish is prolonged by 3. 83% ~ 6. 44% , and the dead zone volume decreases by 5. 6% ~5. 93% ； as the front cavity volume is 1. 06 m3, the average residence time of liquid steel is the longest； as the nozzle flow of tundish is 150 kg/min and 200 kg/min, the longest average residence time is 678 s and 569 s respectively and the minimum proportion of dead zone volume is 5. 87% and 0. 55% respectively./p>6|0|0更新时间：2026-01-21
- 摘要：In order to improve the internal quality of E36 steel slab in a steel plant, a mathematical model of the solidification process of E36 steel slab is established through ProCAST software, and on this basis, the CAFE module is used to simulate the solidification structure of 300 mm x 2 070 mm the cast slab with the superheat 10 ~ 25 ℃., casting speed 0. 70 ~ 0. 85 m/min and secondary cooling ratio 0. 30 ~ 0. 39 L/kg different process parameters as well as adding EMS are studied. From the simulation results, it can be seen that for every 10 ℃. increase in superheat, the proportion of equiaxed crystal regions decreases by 3%. As the degree of superheat increases, columnar crystal regions increase, equiaxed crystal regions decrease. The installation of electromagnetic stirring in the second cold zone increases the equiaxed crystal zone and reduces the average crystal grain radius. According to the simulation results, the process is optimized, and the superheat is reduced from 15 to 10 ℃. By comparing the low magnification structure of the cast slab before and after the optimization, it can be seen that the equiaxed crystal zone of the cast slab is significantly enlarged, and the center segregation is effectively improved.关键词：E36船板钢;板坯;凝固组织;数值模拟;过热度3|0|0更新时间：2026-01-21
- 摘要：The effect of rolling with 15% ~ 40% and cooling rate 0. 8 °C/s and 1.2 °C/s in dual phase rigon on deformation-induced ferrite transformation in SCM435 cold-headed steel is studied by thermal simulation test. The results show that rolling of SCM435 steel in the austenite and ferrite two-phase zone (750 ~ 850 °C)，at a cooling rate of 0.8 °C/s, with amount of deformation increasing, the deformation-induced ferrite volume fraction increases, and there is a granular pearlite structure, and the hardness first decreases and then increases at a cooling rate of 1.2 °C/s, with amount of deformation increasing ,the deformation-induced ferrite volume fraction decreases, and a granular bainite structure appears, and the hardness increases.关键词：形变量;SCM435钢;形变诱导铁素体相变;硬度;冷却速度2|0|0更新时间：2026-01-21
- 摘要：A micro segregation model of solute elements in the mushy zone in continuously cast bloom of bearing steel GCrl5 is established in consideration of δ/γ phase transformation, which is applied in the solidification heat transfer of 220 mm x 260 mm continuous casting bloom. The results show that accurate solidus and liquidus temperature and relationship between temperature and solid fraction during the solidification process of high carbon steel can been acquired by the model only y phase precipitates out from liquid steel directly during the solidification process of bearing steel GCrl5 ；the segregation ratio of S,P and C is bigger at the final solidification stage, as solid fraction increases, the effect of cooling rate on segregation is more remaritable, the content of S,P and cooling rate have a bigger effect on ZDT. After the continuous casting process parameters optimized based on the solidification heat transfer model, the center carbon segregation ratio is 0.96 to 1. 05 and the internal cracks don't appear.关键词：GCr15轴承钢大方坯;微观偏析模型;溶质元素分配;高温力学性能;中心碳偏析6|0|0更新时间：2026-01-21
- 摘要：叙述了国内外常用冷挤压成型工艺的转向横拉杆用钢的应用现状及加工工艺,介绍了横拉杆用普通调质钢、预调质钢及非调质冷镦钢产品的主要技术指标和对应生产的零件性能。生产实践表明,相比普通调质钢MI40Cr和预调质钢ESW90,非调质冷镦钢30MnVS6生产的汽车转向横拉杆强度和塑性可达同等水平,但冲击韧性明显偏低;从化学成分、显微组织、非金属夹杂物及偏析四方面探讨了提升非调质冷镦钢强韧性的研究进展情况,通过正火处理30MnVS6钢的KV2冲击功由热轧态62~67 J提高至108~115 J。关键词：转向横拉杆;调质钢;非调质冷镦钢;强韧性;进展3|0|0更新时间：2026-01-21
- 摘要：In order to ensure that the refining slag has better deoxidation and absorption ability of inclusions, the five top slag modifiers are used to carry out industrial tests on the top slag of the converter tapping ladle of IF steel. ICP-AES (Induction Coupling Plasma-Atomic Emission Spectroscopy) is used to detect the slag composition and FactSage software is used to calculate the viscosity of refining slag. The results show the vacuum circulation degassing (RH) is out the station, after 5 kinds of madifiers are used, that the content of TFe in the refining slag of 5 heats is controlled at 6. 46% ~7. 76%, the ( CaO)/(Al2O3) ratio is 1. 60 ~ 1. 86 at 1 600 ℃, the viscosity of refining slag is 0. 057 ~ 0. 068 Pa ·s, the degradation ratio of degradation caused by inclusions is 2. 10% ~ 12. 86%, and No. 3 modifier (48. 5% Al-10. 2% Al2O3-18. 1% CaO-6. 0% SiO2-8- 0% CaF2) has the best comprehensive performance. After the carbon content in the steel increases to 0. 045% from 0. 032% during converter tapping, and the optimized modifier is used in production, the TFe content in slag before RH is controlled at 7. 13% , and the FeO content in slag after RH is controlled at 5. 52% and during hot rolling, the ratio of off-and sub-quality products with top slag modification is 0. 071%, which is reduced by 20. 2%.关键词：IF超低碳钢DC06;RH;改质剂;精炼渣;全铁;废次比2|0|0更新时间：2026-01-21
- 摘要：The capping technology of low alloy steel SG610E 250 mm x2 000 mm continuous casting tail slab is studied. The results show that with traditional water-cooling capping process, there are severe shrinkage cavities at distance 2 000 mm from the slab end；while with the low-speed casting anhydrous capping,the distance of slab shrinkage cavities decreases to 900 mm,but the slab surface temperature drops into the third brittle zone due to the long duration of ≤0. 2 m/ min casting speed, which lead to transverse cracks on Nb-V-Ti microalloying low alloy steel casting tail slab. Therefore, a non-stopped-pouring speed casting 0.4 m/min anhydrous capping technology for wide and thick slab is developed which improves the internal quality and reduces the surface crack incidence of the steel tail slab.关键词：Nb-V-Ti微合金化低合金钢SG610E;连铸尾坯;打水封顶;无水封顶;表面横裂纹6|0|0更新时间：2026-01-21
- 摘要：The L450M pipeline steel (/% ：0. 06C, 1.52Mn,0. 19Si,0. 017Ti,0.048Nb,0. 028Als) has obtained good strength and toughness by control of compression ratio, reduction ratio and rolling temperature. The results reveal that the high reduction rate of more than 20% in the last three passes of 200 mm slab rough rolling and the first three passes of finish rolling can make the 12 mm steel plate to form fine micron grain during the subsequent cooling process. The grain size is basically below 10μm, and some grains can be refined to below 2 μm. The yield strength of pipeline steel can reach above 500 MPa and the transverse impact energy at -15 ℃ can reach over 300 J by the compression ratio of finishing rolling 3.5, finishing rolling starting temperature at 930 ~ 950 ℃ and finishing temperature at 810 ~ 830 ℃. The yield ratio of steel can be effectively reduced by increasing rough rolling temperature to ≥1 040 ℃, reducing compression ratio to ≤ 3.8 and increasing finish rolling temperature to ≥800℃ etc.关键词：细晶强化;超细晶;屈强比;L450M管线钢;低温韧性2|0|0更新时间：2026-01-21
- 摘要：The analysis shows that cracking of steel ML08A1 rivets with non-standard special-shaped fasteners is mainly caused rivet flanging by the high original strength and the poor plastic shape of the material. By optimizing the composition control in the range of 0. 04% ~0. 06% C, ≤0. 05% Si, 0.30% ~ 0.35% Mn, decreasing Ti content from 0. 021% to 0. 001% and the [N] in the smelting process control less than 30 x 10-6the yield strength of steel decreases from 260 - 264 MPa to 219 - 226 MPa and the work hardening rate of the material can be effectively reduced, to obtain a higher plastic strain capacity and ensure the quality requirements of rivet deep processing, 100 tons of rivet cracking rate from the original 8% reduces to about 0. 33%.关键词：ML08Al钢;非标异型紧固件;铆钉开裂;力学性能;材料塑性5|0|0更新时间：2026-01-21
- 摘要：The production process of steel 10Cr21Mnl6NiN wire rod, including composition design, principle of increasing nitrogen, smelting process, rolling and solution process, precipitation of Cr2N phase is introduced. A 30 t AOD furnace is used for refining, blown nitrogen to increase nitrogen in steel water, and added manganese nitride at the later stage of refining. The surface quality of wire rod is ensured and the problem of central shrinkage is solved by adopting 1 240℃ heating and controlled rolling and cooling in the process. The solution temperature should be controlled at 1 100℃ and cooled quickly after holding for 30 min to prevent the precipitation of Cr2N phase. The 10Cr21Mnl6NiN stainless steel wire rod with excellent surface quality and performance has been successfully produced.关键词：10Cr21Mn16NiN钢;线材;成分;轧制;固溶;Cr2N相6|1|0更新时间：2026-01-21
- 摘要：In order to study the normalizing cooling rate and the cooling uniformity of hypoeutectoid steel medium- and thick-walled seamless steel tube with wall thickness ≥30 mm, the water-air circulation cooling model is used for the normalizing structure and performance control of medium- and low-carbon Mn steel medium- and thick-walled seamless tube. Based on analysis on structure and properties of normalized steel tube with fen cooling, water fog forced cooling and water-air circulation cooling, the water-air circulation cooling process-immersing part of the steel pipe body in water and high speed rotating meanwhile, and controlling the depth of immersion, the rotation speed of steel tube and the total cooling time, of medium- and thick-walled pipe, the performance of yield strength ≥500 MPa, -20℃ V-type impact energy≥100 J based on the stable structure of ferrite + pearlite are obtained.关键词：正火;冷却速度;水-空循环;中、低碳Mn钢无缝管2|0|0更新时间：2026-01-21
- 摘要：针对Φ75 mm的40Cr圆钢下料剪切出现横向开裂,采用直读光谱仪、金相显微镜、SEM、EDS及显微硬度计对试样进行分析。结果表明,裂纹主要由圆钢中存在夹渣缺陷,其表面缺陷经砂轮机打磨烧伤形成马氏体的硬化层,塑性降低,在剪切力作用下最终导致开裂。通过工艺改进石灰量由2.5 kg/t调整为4.2 kg/t,化渣剂由0.45 kg/t调整为0.85 kg/t,Ca/Al比由0.05调整为0.07,水口浸入深度由95 mm调整为105 mm,保护渣碱度由0.78调整为0.86、粘度由0.34 pa·s调整为0.45 pa·s,减少连铸拉速波动等,有效解决了铸坯夹渣缺陷,轧材表面缺陷率由0.35%降低至0.08%,保证了圆钢的产品质量。关键词：40Cr钢;横向开裂;夹渣;表层硬化;保护渣2|0|0更新时间：2026-01-21
- 摘要：Low carbon (C≤0. 12%) Nb-V microalloying S500QL high strength steel plate has been developed. And 15 ~50 mm steel plate is produced by two-stage controlled rolling (first stage rolling at 950 ~ 1 070 ℃, second stage started rolling at ≤890℃ and finishing rolling at ≤850 ℃,on-line cooling direct-quenching( DQ) with 7 ~20 ℃/s after rolling, and tempering at 620 - 670 ℃ for 3 min/ (mm • T), clean steel smelting process with 120 t BOF + LF + VD. The steel plate has fine granular bainite + small amount of proeutectoid ferrite with yield-tensile strength ratio ≤0. 90, elongation A≥19% and impact energy at -50℃ ≥100 J to meet the market demand. And the welding crack sensitivity test and the welding joint property test of DQ process steel plate was carried out. The results show that the steel plate produced by this process has good welding property.关键词：S500QL调质高强钢;DQ;塑韧性;焊接性能5|0|0更新时间：2026-01-21
- 摘要：By Gleeble3500 thermomechanical simulator to determine the dilation curves at continuous cooling conditions, the critical transformation points of steel NM400 are Ac1=719. 4 ℃ and Ac3=847. 8 ℃，and combined with the metallographic method, the continuous cooling transformation (CCT) curves of super cooling austenite of tested steel are plotted using Origin software. The results show that with the increase of cooling rate, the microhardness of steel increases gradually, and the phase transformation gradually changes from ferrite and pearlite to bainite and martensite, and the ferrite content decreases gradually ； when the cooling rate is less than 1 ℃/s, the pearlite content increases gradually, and the grain size gradually decreases; when the cooling rate is greater than 5 ℃/s, the ferrite and pearlite phase transition disappears ,and with the increase of the cooling rate the bainite phase decreases and martensitic phase is gradually increasing.关键词：NM400耐磨钢;CCT曲线;热膨胀法;相变点;组织2|0|0更新时间：2026-01-21
- 摘要：The impact energy samples of non-quenched-tempered steel JGF45V hot-rolled state by finishing rolling at 1 000℃ and normalized state by normalizing at 860℃ are analyzed by metallography and scanning electron microscope. It is obtained that grain size is an important parameter affecting room temperature impact energy of non-quenched-tempered JGF45V steel. Through process test of decreasing the finishing rolling temperature from 1 000℃ to 900 ~930 % with the cooling rate being 0. 3 ℃/s, the grain size rating of steel increases from 5 to 7, and the room U-shaped impact energy increases from 32 J to ≥55 J.关键词：非调质钢JGF45V;冲击功;晶粒度;终轧温度;冷速2|0|0更新时间：2026-01-21
- 摘要：In order to study the effect of quenching and tempering treatment on the mechanical property of R4s (22MnCrNiMo) mooring chain steel flash weld zone, the double quenching is carried out at 880 ~ 960℃. to define optimum quenching temperature by changing the tempering temperature (560 ~ 640 °C), and the holding time 20 ~ 40 min, the effect of tempering temperature and holding time on the mechanical property of steel is studied. The results show that with quenching and tempering treatment, all the fracture surfaces in the weld area are ductile fracture with high strength and good plasticity. Especially after 920 °C 30 min + 920°C 30 min quenching + 600 °C 30 min tempering treatment, the weld zone of steel has higher strength and best plasticity, the strength of steel is 1 071 MPa, the elongation is 17%, and the comprehensive performance reaches the optimal.关键词：系泊链钢;22MnCrNiMo钢;焊缝;调质处理;力学性能4|0|0更新时间：2026-01-21
- 摘要：The materials basic characteristics of structure, austenite grain coarsening and phase transformation point of RL40 steel for flexpline (/% ：0.40C, 0.90Cr, l. 85Ni, 0.25Mo, 0.05Nb, 0.016Ti) has been studied by the quantitative analysis of optical microscopy and thermal expansion experiment. The results show that the microstructure of the rolled bar is bainite + martensite, the average grain size of primary austenite is 14. 0 μm, and the austenite grain size rating is 9. 0 ~ 9. 5, and the average standard deviation is 0. 46 ~ 0. 048. The transformation point Ac1is 729 ℃, Ac3is 769 ℃, Ms is 28 ℃, and the austenite grain coarsening temperature is 1 000 ℃.关键词：谐波减速器柔轮用钢RL40;粗化温度;相变点2|0|0更新时间：2026-01-21
- 摘要：Effect of 1 080 ~ 1 200 ℃ solution temperature on structure and mechanical properties of hat rolled Inconel 601 alloy is studied by means of optical microscope, scanning electron microscopy, hardness tester and tensile tester. The results show that the structure of the hot rolled alloy matrix is elongated austenite grain structure with less dispersed nitride, but the massive carbide precipitated along austenite grain boundary. With the increasing solution temperature, the recrystallization grain size increases gradually, the carbide dissolves slowly, the strength and hardness decrease gradually. When the solution temperature is 1 160 ℃，the crystal grain size is uniform, the carbide dissolves completely, the HRB hardness value of alloy decreases from 84 to 71, and the elongation increases from 52% to 70%. The best mechanical properties of alloy can be obtained by solid solution treated process at 1 140 ~ 1 160 ℃ for 50 min.关键词：Inconel 601合金;固溶处理;微观组织;力学性能3|0|0更新时间：2026-01-21
- 摘要：In order to improve the mechanical properties of 2% Boron 304B7 stainless steel, charge rule of solution treatment after different heat treatment process of 304B7 stainless steel containing boron on the component, microstructure, distribution of borides and mechanical property of 304B7 stainless steel have been studied and analyzed. The results show that two phase compositions of borides are Cr2B and ( FeCr)2B,as-cast state, the borides are distributed in a network shape, and in the rolled state, the borides are distributed in a strip shape along the rolling direction. The borides have good thermal stability, and the amount of borides changes is little after high temperature solution treatment. But at 1 150 °C for 1 h water cooling it is the suitable heat treatment system of 304B7 stainless steel, the borides precipitated by the solution treatment have smaller size and dispersed distribution, and the overall mechanical properties of the material are relatively good, that are impact energy 10.4 J, yield strength 348 MPa, and tensile strength 659 MPa.关键词：">2% Boron Stainless Steel 304B7;Boride;Solution Treatment6|0|0更新时间：2026-01-21
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