最新刊期
卷 42 ， 期 1 ， 2021
- 摘要：Focusing on the characteristics of rolling bearings, the types of bearing steels, and the gap between bearing steels at home and abroad, this paper summarizes the art of the status of the requirement of the bearing steel of the high-end equipment, the types of the bearing steels, the processing equipment and metallurgical quality of the bearing steels, the heat treatment technologies, and the evaluation technologies for both metallurgical quality and performance. It is put forward that the important role to improve the rolling contact life of the bearing steel by ultra-purification technologies among different melting routes, the new heat treatment technologies and the new bearing steel developments. This paper pointed out that it needs to be done in the future through the refinement, the homogenization and the stabilization of the inclusions, carbides and the matrix of the bearing steel to improve the quality and performance of existing bearing steels, to develop the high performance heat treatment technologies, to innovate the high performance bearing steel and to strengthen the basic research on the mechanism of the fatigue-resistance of the bearing steels, which would finally enhances the rolling contact fatigue life of the bearing steel significantly.5|0|0更新时间：2026-01-21
- 摘要：The numerical simulation on process parameters of AISI4340 Steel Φ600 mm cast bloom to 300 mm x 300 mm square billet breakdown has been carried out by Deform-3D software. The effects of heating temperature, rolling speed, reduction ratio and two passes reduction on rolling bloom center deformation and material flow are studied, the equivalent stress and material deformation characteristics of the center during the deformation process are analyzed to get forming law of Φ600 mm round continuous casting bloom rolling into 300 mm square bloom. The results show that the heating temperature has little effect on die strain of the core at 1 070 ~ 1 140 °C ,and the variation range is about 2.3%. When the rolling speed is 1.0 ~ 2. 0 m/s and the total reduction is fixed ,it is better to weld the core defects at deformation of first big then small关键词：AISI4340钢;Φ600mm铸坯;开坯;等效应变;模拟;Deform-3D6|0|0更新时间：2026-01-21
- 摘要：Key words:Ultra-Pure Ferritic Stainless Steel, Inclusions, Titanium Alloying, Al/Ti Ratio, T[0],Cleanliness关键词：超纯铁素体不锈钢;夹杂物;钛合金化;铝钛比;T[O];纯净度4|0|0更新时间：2026-01-21
- 摘要：In order to overcome the limitation of traditional oxygen lance in converter steelmaking technology, the five- hole swirl oxygen lance with different structure parameters is simulated study by numerical simulation. The effects of the tilt angle (13° ~15°) and swirl angle (0 - 15°) of swirl oxygen lance on jet attenuation, coalescence morphology and impact area are analyzed. The results show that the jet velocity of the swirl lance are lower than that of the ordinary lance, but the stirring capacity to the molten pool is stronger because of the tangential force； the increase of the inclination angle will increase the radial velocity component of the jet； the possibility of jet coalescence will be reduced because of the effect of the swirl angle. The tilt angle has an important effect on the jet coalescence, with the decrease of tilt angle, the coalescence of jet is more serious, and the impact area of jet decreases. When the inclination angle is 15° and the swirl angle is 10°, the impact area is largest.关键词：旋流氧枪;数值模拟;射流衰减;聚并形态;冲击面积2|0|0更新时间：2026-01-21
- 摘要：设计了超宽板坯高强包晶钢S690的A、B两种保护渣,配方A（/%）:28～32SiO2,38～40CaO,4.8～6.0TC,2.3～4.3Al2O3,6.7～9.7F;B （/%）:25.2～26.4SiO2,41～43CaO,4.8～6.0TC,2.3～4.3Al2O3,10.5～11.8F。保护渣在生产现场试验后,对该保护渣的传热性能和渣膜进行了分析,结果表明,A保护渣性能最佳,其碱度1.25～1.35,粘度（1 300℃）0.11～0.16 Pa·s,凝固温度1170～1200℃;与B保护渣（碱度1.58～1.64,1 300℃粘度0.07～0.10 Pa·s,凝固温度1 220～1 250℃）相比,铸坯裂纹率从0.69%降至0.30%。关键词：超宽板坯;高强包晶钢;保护渣;性能4|2|0更新时间：2026-01-21
- 摘要：采用120 t BOF-LF-180 mm×180 mm连铸坯-线材轧制工艺,成功开发30CrMnTi钢盘条（/%:0.26～0.27C、0.84～0.86Mn、1.07～1.08Cr、0.055～0.066Ti）。通过采用LF精炼前期喂铝线,后期喂钙线,精炼渣碱度5～6,中间包钢水过热度20～40℃,控冷控轧精轧后温度890℃等工艺措施,结果表明,Φ6.5 mm盘条[O]（15～19）×10-6,[N]（45～58）×10-6,D细0.5～1.0级,其余0～0.5级,平均抗拉强度706 MPa,断面收缩率72%,HRB硬度值≤90;总脱碳层<1.0%D,各项指标均满足客户要求。关键词：30CrMnTi钢;产品开发;工艺控制11|2|0更新时间：2026-01-21
- 摘要：采用宏观观察、化学分析、微观分析等方法对20钢管内折缺陷产生的原因进行了分析和研究。结果表明,内折缺陷周围存在大量大级别的夹杂物,在穿管过程中夹杂物逐渐靠近内壁而形成内折缺陷。在生产中,通过采用精炼渣面用SiC替代铝粒脱氧、精炼软吹时间保持在≥15 min和连铸拉速由原2.1 m/min降至1.9 m/min等措施,管坯钢中大型B类夹杂物级别由3降至0,避免了穿孔过程中内折缺陷的产生。关键词：Φ168 mm×5 mm 20钢;钢管;内折缺陷;夹杂物2|0|0更新时间：2026-01-21
- 摘要：研究了自旋式6孔浸入水口对铁路车轴钢LZ50Φ690 mm连铸坯包括低倍组织、夹杂物、碳偏析等质量的影响。结果表明:与传统5孔水口相比,自旋式浸入水口连铸坯中心最大中心缩孔由22.7 mm降低到12.8 mm,平均缩孔尺寸从7.8 mm减小到5.5 mm,大于15 mm的缩孔消失;疏松程度均为1级,中心等轴晶区增大了74.1%。夹杂物上浮效果显著,钢中夹杂物数量显著减少,且消除大于40μm的夹杂物;偏析比由0.92～1.1降低到0.93～1.05。关键词：大圆坯;自旋式浸入水口;碳偏析;低倍;夹杂物2|0|0更新时间：2026-01-21
- 摘要：采用化学成分分析、金相检验、硬度分析、断口形貌分析和氧氮含量检测等方法,分析了SWRCH15A钢螺栓断头的原因。结果表明,合格螺栓T[O]和[N]分别为0.002 0%%～0.002 1%和0.006 2%～0.006 4%,而断头螺栓T[O]达0.006 3%～0.0064%,[N]为0.010 3%～0.0108%,导致材料在冷变形过程中塑性降低,螺栓头部HRB硬度值超过100,易在应力集中的头部和杆部过渡区断裂,是螺栓断头的主要原因。通过控制精炼渣(FeO+MnO)≤1.0%,防止钢水吸氧氮和二次氧化,待浇时间由原来的15～20 min降至5～10 min、加砂方式由人工投掷改为导管罐装加砂、加强包底清理等措施,钢包自动开浇率由原来的85.7%提高至98.9%,未再出现类似质量问题。关键词：输电铁塔用SWRCH15A钢;螺栓断头;微观组织;预防4|0|0更新时间：2026-01-21
- 摘要：研究了1250 MPa级Nb-V微合金化Si-Mn-Cr-Mo系贝氏体轨钢(/%:0.25 C,0.38-1.56 Si,1.69～1.76 Mn,1.34～1.37 Cr,0.32～0.33 Mo,0.034～0.036 Nb,0.11～0.12 V)硅含量对试验钢显微组织和力学性能的影响。试验结果表明:试验钢热轧后空冷,随着硅含量的增加,试验钢的铁素体+珠光体相变被抑制,室温组织中贝氏体、马氏体含量增加,影响钢的强度和硬度,硅含量由0.38%提高到1.56%时,试验钢的屈服强度由846 MPa增至903 MPa,抗拉强度由1 280 MPa增至1 355 MPa,HBW硬度值由353增至411。关键词：Nb-V微合金化;Si-Mn-Cr-Mo贝氏体钢轨钢;硅;组织;力学性能2|0|0更新时间：2026-01-21
- 摘要：铸坯高中心等轴晶率及小的二次枝晶臂间距有利于降低高碳钢M+E-EMS连铸坯中心偏析。通过建立GCr15钢220 mm×260 mm连铸坯耦合有限元-元胞自动机模型(CAFE)及二次枝晶臂间距(SDAS)模型,研究结晶器电磁搅拌、过热度和拉速对中心等轴晶率及二次枝晶臂间距的影响。结果表明,相比于拉速,过热度和结晶器电磁搅拌对其影响明显。随着过热度降低及结晶器电磁搅拌强度增加,铸坯中心等轴晶率增加而二次枝晶臂间距减小,而拉速对凝固终点和中心固相率影响大。工业试验结果表明,采用结晶器与凝固末端电磁搅拌,相比于过热度35℃和拉速0.75 m/min,控制过热度小于25℃且拉速调整为0.8 m/min时,轴承钢GCr15铸坯中心等轴晶率由原27%增加至38%且二次枝晶臂间距细化,中心碳偏析指数由原1.06～1.39降至0.93～1.13。关键词：220 mm×260 mm铸坯;GCr15轴承钢;中心等轴晶;二次枝晶臂间距;中心偏析2|0|0更新时间：2026-01-21
- 摘要：The microhardness, impact toughness, wear resistance, phases composition and microstructure of die steel for auto engine crankshaft forging of boroning process at 850 ~950 ℃ 3 ~6 h are studied. The research results show that the steel boronized at 925 ℃ for 4 h has better performance, that is the maximum HV microhardness value of tlie boronizing lay¬er 1712,the thickness of the boronizing layer 58.6 pjn,and the impact toughness value at 400 ℃ and 24 ℃ respectively 39 J • cm-2and 27 J • cm-2and the wear amount after 90 min friction test 6.7 mg of die steel. The phase composition shows that the main phase of the boronizing layer is Fe2B, while the boriding layer,transition layer and matrix microstructure are obviously observed in microstructure.关键词：渗硼工艺;汽车模具钢;性能;微观结构2|0|0更新时间：2026-01-21
- 摘要：The effect of 230 mm x (1 580 ~ 1 780) mm cast slab rough rolling slab 100 ~300 mm width sizing press and 2~6 pass reduction partition of 700 MPa Ti micro-alloyed high-strength steel (/% ：0. 05 ~0. 07C,0. 05 ~ 0. l0Si, 1. 10~1. 25Mn,0. 075 ~ 0. 095Ti) on the final 10 mm plate microstructure is studied. The results show that the inhomogeneity of microstructure will become more obvious when the extent of slab sizing press increases, as well as the size of the banded structure of ferrite well increase, and the tensile lamination cracks occurred trend will increase too. It also shows that the microstructure will be more uniform when the rolling reductions of different passes are uniform. The slab sizing press a- mount has more influence on the uniform of the microstructure than the rolling reduction partition of different passes. The i- deal process should be with the slab width sizing ≤100 mm and the single rolling reduction ≥20%.关键词：Ti微合金化;粗轧;板坯定宽量;拉伸分层4|0|0更新时间：2026-01-21
- 摘要：The effects of niobium content (0.011% ~0.055% ) and heating temperature (1100 - 1250 ℃)on mi¬crostructure and properties of HRB400 steel rebar 20 mm plat are studied by thermal simulator Gleeble, high temperature la¬ser con-focal microscope and transmission electron microscope. In 20 mm plate with heating at 1180 °C for 1h, with in¬creasing content of niobium addition, the bainite content in steel increases to inhibit ferrite transformation, leads to increasing yield strength. Addition of 0.024% niobium,the microstructure has 50. 8% ferrite ,39.0% perlite and 10.2% bainite, wliich corresponds to yield strength of 426 MPa, tensile strength of 685 MPa,elongation of 24. 0% and reduction of area 61.3%. The size of niobium precipitates gradually refine with the increasing of heating temperature, the number is gradually increasing, and the disperse distributed niobium-containing precipitates with a size range of 7 ~ 88 nm can be produced at a heating temperature of 1180 °C.关键词：铌微合金化;HRB400钢;加热温度;珠光体;贝氏体2|0|0更新时间：2026-01-21
- 关键词：高氮不锈轴承钢X60N;残余奥氏体;高硬度;高温硬度;碳氮化物;耐蚀性能2|0|0更新时间：2026-01-21
- 关键词： Low-Carbon Bainitic Steel, Quenching, Tempering Sorbite, Fracture Morphology 2|0|0更新时间：2026-01-21
- 摘要：Key words:Mooring Chain Steel, 22MnCrNiMo, Heat Treatment, Corrosion Resistance, Flash Weld Seam. ,5|0|0更新时间：2026-01-21
- 摘要：Key words:Nb-Ti Microalloying X65MO Deep Sea Pipeline Steel, Low Temperature Toughness, Welding Performance ,关键词：Nb-Ti Microalloying X65MO Deep Sea Pipeline Steel, Low Temperature Toughness, Welding Performance 2|1|0更新时间：2026-01-21
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