武钢4#高炉大修煤气系统改造设计

武钢４~#高炉大修炉顶压力由０．１５ＭＰａ提高至０．２０ＭＰａ,对粗煤气系统钢结构、设备及管道进行了验算和补强．煤气清洗系统工艺及设备进行了技术改造。     

750m^3高炉无料钟炉顶溜槽传动系统

莱芜钢铁总厂７５０ｍ３高炉双罐并列式无料钟炉顶旋转溜槽行星传动系统使溜槽既可绕高炉中心线会圆周运动，又能倾动，实现了炉喉的理想布料。无料钟炉顶使炉顶压力达到０．１５ＭＰａ，单座高炉利用系数达２．４ｔ／ｍ３·ｄ，并可充分利用煤气，化学能、热能、简化炉顶结构，节省投资。     

湘钢3^#高炉引进炉顶设备的改进与完善

湘钢对３＾＃高炉引进的前西德二手炉顶设备，进行了消化，检修改造，加强管理等工作，掌握了３种炉顶设备的运转规律，解决了炉顶各阀，布料器等设备难题，保主下了炉顶设备正常工作使炉在０．０５ＭＰａ，风量水平达到１６００ｍ＾３／ｈ，创造了高炉稳产、高产条件。     

湘钢3号高炉炉顶二手设备的改进

湘钢３号高炉于１９９３年７月投产，炉顶设备为从德国引进的二手设备。在高炉生产过程中针对炉顶设备存在的问题，先后对大小钟及密封钟、布料器，可调炉喉以及炉喉波纹管等设备进行了改造。设备改造后，炉顶压力提高到０．０５ＭＰａ，高炉利用系数达１．３５。     

耐火纤维喷涂辅助技术的应用研究

耐火纤维喷涂是纤维机械化施工的一种新工艺。随之在喷炉顶时其厚度和抗拉强度都受到了限制，耐火纤维喷涂的辅助技术解决了上述问题，一是结合剂应具备的两种特性；二是使用便携式针刺机对炉顶纤维层进行针刺处理。纤维喷涂层通过针刺处理，它在纵向的抗拉强度可达０．０１５－０．０３ＭＰａ，解决顶层纤维的剥离脱落问题，大大提高了炉顶喷涂层的使用寿命。     

武钢新3号高炉的建设及所采用的新技术

武钢新３号高炉的建设是该公司实现年产生铁７００万吨重点项目。该高炉建设的主导思想旨在利用国产焦煤和矿石，寻找高炉大型化的途径。设计采用了如下一些新技术：入炉前焦炭整粒，烧结矿过筛，炉顶压力可达０．２５ＭＰａ的无钏炉顶，内燃式高风温热风炉，喷吹煤粉等冶炼技术；水冷全碳砖薄炉底，全立式冷却壁全密闭软水冷却工艺等延长高炉寿命技术；ＩＮＢＡ炉渣炉前粒化工艺，环形出铁场，炉前除尘采用静电除尘器等改善高炉工作     

GH169合金在长期时效过程中组织的稳定性

经电子显微镜观察，ＧＨ１６９合金经５５０℃长期时效后，晶内有盘状γ’相和少量层状δ相。５５０℃５００ｈ时效后，２０℃δｂ为１４５３ＭＲａ，δ０．２为１２４０ＭＰａ，５５０℃１０００ｈ时效后，６５０℃δｂ为１１５３ＭＰａ，δ０．２为１０４０ＭＰａ。     

优质热风炉粘土砖的研制

以特级焦宝石和硅线石为主要原料，并加入少量添加剂，采用４级配料，共磨细粉等工艺，研制出气孔率１３．５％、０．２ＭＰａ荷重（１２５０℃×５０ｈ）蠕变率０．３～０．６％、０．２ＭＰａ荷重软化温度（ＫＤ）为１４７０℃优质热风炉粘土砖。该粘土砖具有较好的高温体积稳定性、蜗变性和耐磨性。     

大型高炉采用高压操作问题的探讨

本文分别对高炉采用高压操作对生产的影响、产生的效果进行了描述。目前高炉炉顶操作压力一般在0．3MPa以下，文中提出假设，当高炉采用超高压时，从炉顶压力对炉腹煤气量、高炉产量的影响，炉顶压力对鼓风机、炉顶及煤气清洗系统设备的影响等方面进行了探讨。     

微合金化对钢轨断裂韧性和耐磨性的影响

本文的目在于研制一种１０００ＭＰａ级抗拉强度，断裂韧性（Ｋｉｃ值）不小于５０ＭＰａ／ｍ＾２的耐磨钢轨钢。试验选用钢种的化学成份为：０．５５－０．６５％Ｃ，１．０－１．５％Ｍｎ，并加入微合金化元素铌和／或钒，采用常规工艺生产５２ｋｇ／ｍ的钢轨，以评定其机械，冶金和耐磨性能。     

超音速气雾化喷嘴中抽吸压力变化规律的研究

对超音速气雾化喷嘴中抽吸压力ΔP的变化进行了试验研究,重点考察了雾化气体压力P0、气流夹角α、导液管锥顶角β及突出长度h对抽吸压力的影响。试验结果表明,在(0.5～4.0MPa)雾化压力范围内,抽吸压力皆呈负压状态。但抽吸压力变化分三阶段:随着雾化压力的增加,雾化压力在0.5～1.5MPa范围内,抽吸压力减小;雾化压力在1.5～3.5MPa之间时,抽吸压力逐渐增大,并达到一个最大值;当雾化压力超过3.5MPa后,抽吸压力又逐渐降低。锥顶角越大,抽吸压力越大;而雾化压力升高到或大于3.23MPa时,随着突出长度的增加,抽吸压力逐渐减小。     

A novel crucible-less inert gas atomisation method of producing titanium powder for additive manufacturing

A novel low-cost gas atomisation technology producing spherical titanium powder (wire induction heating gas atomisation, WIGA) has been developed for additive manufacturing. Combined with the gas atomisation principle, the characteristics of WIGA were analysed. The effects of the gas pressure, metal temperature and the wire-feeding speed on the particle size of the titanium powder were studied. The results indicated that the decreases in mass median particle diameter (D₅₀) and the increases in efficiency of fine size powders occurred with the increase in gas atomisation pressure and melting temperature and with the decrease of wire-feed speed. The optimum parameters are that the main gas pressure (P₀) is 4.0?MPa, the degree of superheat of the metal melt is 350°C and the wire-feed speed is 50?mm?s^?1. On the condition, the D₅₀ of titanium powder was 40.2?μm and powder morphology was spherical. Satellites rarely existed on the surface of particles.     

Thermodynamics of the Ti-H system

Hydrogen gas has been equilibrated with the hydrogen dissolved in titanium. The equilibrium pressure (<10 MPa) of the gas and the hydrogen concentration (40 ∼ 70 mol pct) in titanium have been measured at 576 to 980 K by Sieverts' method. A Gibbs-Duhem integration has been made to obtain the thermodynamic activity of titanium and the formation properties of the “TiH₂” phase. Interaction energies between neighboring atoms in the hydride have been evaluated by applying a quasi-chemical model of statistical mechanics.     

连续退火温度对390 MPa级IF钢组织、织构和力学性能的影响

试验用390 MPa级IF钢(/%:0.005C,0.04Si,0.35Mn,0.095P,0.005S,0.030Nb,0.016Ti,0.036Alt)0.8 mm冷轧板由4 mm热轧板冷轧生产。研究了连续退火温度780~820℃对该IF钢组织、织构和力学性能的影响。结果表明,当连续退火温度由780℃提高至820℃时,IF钢的屈服和抗拉强度分别由282 MPa和432 MPa降至249 MPa和405 MPa,伸长率A₅₀和塑性应变比r_m分别从37.2%和1.45提高到41.7%和1.84,具有较好的深冲性能;但随退火温度升高,平面各向异性指数△r由0.44提高到0.65,铁素体晶粒尺寸增大,组织均匀变差,同时变形织构{112}<110>变弱,有利织构{111}<110>增强,{001}<110>变弱,综合考虑退火温度控制在820℃左右为宜。     

Large-diameter gas pipe produced at OAO Volzhskii Trubnyi Zavod

The production of new helical- and straight-seam pipe (diameter 1420 mm) for working pressures of 9.8 and 11.8 MPa (strength categories K60 and K65, respectively) has been introduced at OAO Volzhskii Trubnyi Zavod. High-quality thick sheet with limited carbon and sulfur content is used for pipe production. Shaping, welding, and expansion processes have been introduced. Pipe performance is investigated. On the basis of the results, the new pipe may be recommended for the current OAO Gazprom projects (the Northern-European gas pipeline and the Bovanenkovo-Ukhta gas pipeline).     

Si含量对10B21钢热轧盘条组织和性能的影响

分析和研究了0.03%～0.21%Si含量对含硼冷镦钢10B21 (/%:0.20C,0.03～0.21Si,0.82～0.83Mn,0.009～0.013S,0.015～0.016P,0.001 9～0.002 0B)Φ34 mm热轧盘条组织和性能的影响。盘条热轧的终轧温度为900℃,缓冷。结果表明,Si含量由0.03%增加到0.21%,10B21钢盘条抗拉强度由480 MPa增加到489 MPa,即增加了9 MPa;HRB硬度值增加5.3,钢的组织中铁素体团尺寸由52μm降低至42μm,非金属夹杂物尺寸及数量无明显变化,淬透性能提高。     

喷雾干燥回收沉淀泥浆中的TiCl4

采用喷雾干燥法对粗四氯化钛沉淀泥浆中TiCl4的回收进行了研究。首先,在实验室以空气作为沉淀泥浆干燥的加热介质,进行喷雾干燥。然后,在生产现场以氩气作为沉淀泥浆干燥的加热介质,进行喷雾干燥。研究结果表明,以氩气作为沉淀泥浆干燥的加热介质,在喷雾驱动进气压力为0.5 MPa,加热干燥进气压力为0.15 MPa,加热干燥进气温度为350℃,尾气出口温度为125℃的条件下喷雾干燥,沉淀泥浆中TiCl4的含量由55.3%(质量分数,下同)降至1.8%,对应泥浆中TiCl4的蒸发率达98%以上,回收率达96%以上。     

High Temperature Deformation Behavior of Fe-9Ni-C Alloy

 The high temperature deformation behavior of the 9Ni steel has been studied by the Gleeble-3500 tester. The relationship between deformation resistance and deformation degree, deformation temperature and deformation rate was revealed. The results show that when the deformation degree is less than 02, the deformation resistance increases by about 70 to 200 MPa, while the deformation degree varied between 02 and 04, the deformation resistance increases by about 30-40 MPa, when the deformation degree is larger than 04, the deformation resistance increases slowly, some become stable gradually. The influence of deformation temperature on deformation resistance is larger, and deformation resistance at higher temperature is about 160 MPa smaller than at lower temperature. Higher deformation rate leads to larger deformation resistance. The deformation resistance increases about 70 to 110 MPa with the increase of the deformation rate. A new and highly accurate mathematical model of the steel was established to describe the deformation behavior during rolling.     

中高碳量粉末锻造钢的综合性能

研究了中高碳量Fe-2Ni-0.5Mo-xC及Fe-2Cu-xC粉末锻造钢经淬火-回火热处理后的综合力学性能。由4600合金粉制造的Fe-2Ni-0.5Mo-0.6C成分和由水雾化铁粉制造的Fe-2Cu-0.5C成分的粉末锻造钢具有良好的综合力学性能。前者抗拉强度达1570MPa,硬度为HRC45.2,冲击韧性为31.4J/cm2。后者抗拉强度达1090MPa,硬度为HRC40.7,冲击韧性为38.0J/cm2。可以满足要求具有高强度、良好韧性以及较高耐磨性的结构零件的需要。