多模式下不锈钢管固溶热处理工艺研究与实践

分别介绍了连续辊底式固溶热处理炉、台车式箱式炉+快速下水机构、钢管夹持旋转装置+辊底式固溶炉、连续式保护气氛光亮退火炉的四种固溶热处理工艺技术,通过控制加热制度和冷却速率,实现不锈钢固溶热处理规格组距、钢种牌号的全覆盖。生产实践证明:多模式下的不锈钢管固溶热处理工艺技术,各项数据指标满足标准及使用要求,实现降本增效,具有推广应用价值。     

生产优质不锈钢线棒材的现代技术

不锈线棒材热轧后进行在线热处理可省却昂贵的离线固溶,根据钢种,市场需要和有效的空间,可以采用三种不同的工艺：在盘卷期间或紧跟盘卷后直接水淬;在辊道式输送装置上的一隧道式退火炉中进行在线固溶退火;以及在紧跟盘卷成型设施后的辊底炉或转底炉中进行在线固溶处理。     

江苏凯特尔工业炉有限公司

江苏凯特尔工业炉有限公司是集设计、制造、安装调试为一体的工业炉专业生产企业,主要产品有:全氢、高氢燃气系列强对流罩式退火炉,全氢,高氢电加热系列强对流罩式退火炉,连续式光亮退火炉,保护气发生装置及常压容器的制造等。产品广泛应用于冷轧带钢、薄板、有色金属板、带、合金材料、链条、焊条、标准件、钟表材料、工具机械等行业的退火处理,同时还能提供钢材球化退火、有色金属固溶强化热处理等设备。公司设有一个科技含量较高的技术研发中心,其中高级职     

钢铁材料的强化方式

<正>钢铁材料的基本强化机制主要包括固溶强化,位错强化,细晶强化和第二相强化,通过这些强化机制来控制微观组织以获得最优综合性能。固溶强化可以分成间隙式固溶强化和置换式固溶强化,前者是最为经济有效的强化方式,在钢铁材料获得广泛应用,但是强化效果受到固溶量的限制,特别是对钢材韧性和塑性、焊接性损害较大,因而在普碳钢和低合金钢中很少采用C的间隙固溶强化。而置换固溶强化的强化效果相对较弱,添加1%的合金元素可以提供     

全氢罩式炉的特性及在天铁冷轧的应用

罩式退火炉用于多种材料的周期式退火。介绍了全氢罩式退火炉的新发展，论述了用H2作保护气体所需的安全系统，并与传统罩式炉及连续退火炉进行了多方面比较，阐明了天铁选择全氢罩式退火炉的原因。     

首条国产自主高精铝合金型材辊底式固溶淬火炉在南宁试产

正针对国内铝合金型材固溶淬火装备落后,急需升级换代这一重大需求,东北大学轧制技术连轧自动化国家重点实验室和广西先进铝加工创新中心的研发团队启动了辊底式固溶淬火装备的研究和开发,并于2019年11月13日试产成功。此条生产线是首条国产自主高端高精铝合金型材热处理辊底式固溶淬火生产线,填补了国内高端高精铝型材卧式高效固溶淬火     

冷轧宽带钢连续退火炉与罩式退火炉的比较研究

在概述了罩式退火炉和连续退火炉的基础上,从带钢品种、性能、生产三方面对罩式退火炉和连续退火炉作了分析比较。     

强循环系统对罩式退火炉产量的影响

主要对罩式退火炉内的传热过程进行分析,运用相似准数研究强循环系统对罩式退火炉产量的影响。最后得出结论：强循环系统是提高罩式退火炉产量的有效措施之一     

轴承钢材在连续式退火炉中球化退火工艺试验

轴承钢球化退火过程的实质是碳化物固溶、析出和集骤。球化组织。球化速度除原始组织影响外,关键是球化工艺。而连续退火炉,可根据轴承钢球化退火工艺的要求,既能灵活调整炉内各温度段的温度,又可改     

气垫式连续退火炉在高精度铜带生产中的应用

简述了气垫式连续退火炉的基本原理、设备组成、特点及发展趋势,分析了气垫式连续退火炉光亮退火的工艺过程及特点,提出了我国铜加工行业加快消化吸收、改进已引进的气垫式连续退火炉的迫切性。     

脉冲燃烧技术在辊底式连续固溶炉改造中的运用

介绍了脉冲燃烧技术的特点,并讨论了该技术在宝钢特钢事业部117#辊底式连续固溶炉改造中的应用。该炉采用的脉冲技术具有节约能源、提高炉温均匀性、高传热效率、低NOx排放、调整工艺方便的特点。该项目的实施,既稳定了热处理质量,又提高了固溶炉的节能效率与传热效率,同时获得了可观的经济效益。     

陶瓷纤维模块在工业炉中的应用

以冷轧带钢退火炉为例,介绍了陶瓷纤维模块炉内衬的应用以及安装方法,并对模块化内衬和层铺毯式内衬的炉壁温度进行对比分析.结果表明,陶瓷纤维模块用于炉内衬显示了众多的优越性.在新型炉窑设计或旧炉窑的改造中,陶瓷纤维模块应该成为首选的设计方案.     

铝轮毂固溶热处理联合电炉的设计

介绍了铝轮毂固溶热处理联合电炉的设计方法、结构特点、炉子组成以及需要注意的问题。     

超(超)临界锅炉用Super304H钢管研究试制

对Super304H的冶炼、冷加工、固溶热处理工艺进行了研究;观察了钢坯和钢管的显微组织.通过在EF和LF炉中深度脱硫,钢中硫的质量分数可达0.005%以下;钢坯中具有极少量的δ铁素体,钢管具有单相奥氏体组织;钢的冷加工硬化与其他18Cr-8Ni型不锈钢相当,冷加工性能优异,可采用类似的冷加工工艺;固溶热处理对钢管晶粒度有明显影响.试制钢管的化学成分及各项室温性能完全符合技术条件要求.     

Mathematical model of metallurgical thermal processes and application

There are lots of physical changes and chemical reactions in the processes of iron and steel making, these processes are quite complex in the aspect of heat transfer.The processes of iron and steel making can be approximately divided into three kinds.The first kinds are the processes of fusion metallurgy which involve enormous chemical reactions,such as blast furnace,converter,electric furnace and coke oven.The second kinds are the processes of heating and cooling which are mainly the physical changes,such as walking-beam reheating furnace,annular heating furnace and car-type furnace.The third kinds are the processes of heat treatment which mainly adjust metallurgical structure of metal,such as roller hearth heat treatment furnace, strip continuous heat treatment vertical/horizontal furnace and HPH bell-type annealing furnace.Every process can only be finished in particular thermal equipment.And all the physical and chemical processes mentioned above must obey first principles of engineering thermodynamics,heat & mass transfer,hydromechanics, combustion,metallurgy physical chemistry etc,and which can be summarized as principle of heat transfer,mass transfer,momentum transfer and chemistry reaction.In this paper,based on first principle of heat and mass transfer in iron and steel making processes,a series of mathematical models of thermal equipments and processes are presented.Such as the model of hot-blast stoves,coke oven,CDQ-boiler system,sintering, reheating furnace,soaking furnace,annular heating furnace,roller hearth heat treatment furnace,strip continuous heat treatment vertical/horizontal furnace,HPH bell-type annealing furnace,control cooling of medium plate,burner,heat exchanger and regenerative burner etc.The on-line application of the model is based on experimental certification of the mathematical model.And finally the computer optimization system of metallurgical thermal process is obtained.     

高炉煤气泄漏的综合治理

针对高炉炉基及出铁口煤气泄漏严重的问题,研究实施了一种全新的封堵治理方案,收到了良好的效果,为今后同类故障的处理积累了宝贵的经验。     

合成氨装置开工加热炉螺旋管顶部结构合理设计

以某加热炉制造商为某合成氨企业设计的开工加热炉盘管为例,具体分析了其螺旋管顶部结构设计的不合理性,并详细介绍了开工加热炉螺旋管顶部结构合理化设计的解决方案,为实际工程设计提供了优化建议。     

Effects of rapid heating on solutionizing characteristics of Al-Si-Mg alloys using a fluidized bed

Effects of rapid heat transfer using a fluidized bed on the heat-treating response of Al-Si-Mg alloys (both unmodified and Sr modified) were investigated. The heating rate in the fluidized bed is greater than in conventional air convective furnaces. Particle size analyses of eutectic Si showed that the high heating rate during fluidized bed solution heat treatment causes faster fragmentation and spherodization of Si particles compared to conventional air convective furnaces. The mechanism of Si fragmentation through fluidized bed processing is through both brittle fracture and neck formation and its propagation. In contrast to this, the mechanism of Si fragmentation using a conventional air convective furnace is through neck formation and propagation. The Sr-modified D357 alloy showed a faster spherodizing rate than the unmodified alloy. Thermal analyses showed an exothermic reaction during solution heat treatment using a fluidized bed due to recrystallization, and coarsening of eutectic Al grains. Whereas the alloy solutionized using a conventional air convective furnace showed two exothermic reactions, one due to annihilation of point defects and the other due to recrystallization, and coarsening of the eutectic grains in the aluminum matrix. The recrystallization temperature of the alloy solutionized in the fluidized bed is lower than those in the conventional air convective furnace. Both tensile strength and elongation of fluidized bed solutionized alloys are greater than those solutionized using the air convective furnace. The optimum heat-treatment time for T4 temper using a fluidized bed for unmodified and Sr-modified alloy was reduced to 60 and 30 minutes, respectively.     

钼冶金学技术发展现状与展望

评述了近年来钼冶金学技术发展,主要有利用流态化焙烧炉、2段流态化焙烧炉和微波炉氧化焙烧钼精矿生产工业氧化钼;用MAP从低品位钼精矿生产工业氧化钼或化学级三氧化钼;升华法生产高纯三氧化钼;将钼粉转化成钼酸溶液,采用阳离子交换树脂除杂,干燥,用氢还原制取出低U、Th的高纯钼粉。     

高炉渣处理和热能回收的现状及发展方向

评述了因巴法（INBA）、图拉法（TYNA）、底滤法（OCP）、拉萨法（RASA）等国内外高炉渣处理的方法及回收高炉渣热量的物理法和化学法。认为目前的高炉渣处理存在新水消耗大、炉渣物理热无法回收和二氧化硫、硫化氢等污染物排放的问题,且在已研究的回收炉渣热量的方法中,未考虑处理后炉渣的应用或存在设备损耗大、热量回收率低等问题。拟开发的高炉渣干法粒化技术有望同时解决其渣粒化及热量回收的问题,是高炉渣处理利用的发展趋势。