铸造行业中频感应电炉的工艺与管理节能的应用实践

中频感应电炉应用电磁感应原理，在被熔化的炉料内部产生热量而使炉料熔化，具有熔化速度快、电效率和热效率高、能源消耗量低、冶炼合金元素烧损量小、脆性夹杂物少、纯净度高、操作使用方便等诸多优点，成为铸造行业的重要熔炼设备。但目前中频炉冶炼没有强化冶炼的措施，实际冶炼电耗一般在（660～850）kW·h/t，能耗相差较大。因此从工艺、设备、管理等方面研究实施中频感应电炉的节能，实现铸造行业节能环保，已成铸造同行研究的重要课题。     

含镍铸造钛铝合金的热处理

对含镍０２％～０５％（原子百分数,下同）的铸造Ｔｉ４６５Ａｌ２５Ｖ１０Ｃｒ（％）合金进行１１５０℃×１４４ｈ等温热处理,使铸态粗大、不均匀的层片组织分解为均匀、细小、等轴的近γ组织,然后将其重新加热到１３７０℃×（５～１０）ｍｉｎ后冷却,得到层片团等轴、细小、均匀的全层片组织。对镍微合金化简化铸造钛铝合金组织均匀化、细化热处理工艺的作用机理及含镍的钛铝合金细小全层片组织的形成机理作了分析讨论。     

100 t EAFLFCCM流程生产SWRH82B的工艺实践

安钢第一炼轧厂采用100 t FSFLF6机6流工艺路线生产冶炼了预应力钢绞线SWRH82B。其关键工艺参数控制：电炉终点w(C)＝050％～070％，精炼炉控制精炼时间大于40 min，保证上钢前弱吹氩，控制钢水中夹杂物，连铸中中间包温度控制在 1482～1497 ℃，拉速22～24 m/min，采用结晶器电磁搅拌和末端电磁搅拌，全程保护浇注。结果表明，实物的质量和力学性能均完全达到了使用要求。     

牙科含钛镍基烤瓷合金可铸造性研究

报告了最近研制的牙科无铍、含钛的镍基烤瓷合金（ＮＣＴ１）和无铍、不含钛的镍基烤瓷合金（ＮＣ１）的可铸造性。试验采用网格检测法和薄片铸造法,通过计算网格数和薄片完整性来评价可铸造性。结果表明这两种合金网格铸出率为１００％ 。ＮＣ１ 和ＮＣＴ１ 薄片铸出率分别为９７５％ 和９５０％ ,两组无显著差异。研究结果说明加入少量钛到镍基合金中,对合金的可铸造性无显著的不良影响。     

半固态金属铸造工艺的研究现状及发展前景

论述了半固态铸造中的流变行为,非枝晶组织特征,半固态合金材料的制备方法、成形工艺以及工业应用现状。作者认为：半固态铸造新工艺,不仅对降低制造总成本有吸引力,同时为实现铸造生产的创新设计、探索新合金的冶炼工艺及传统合金的新处理方法提供了可能     

热型连铸Al-1%Si合金线材的试验分析

通过在自行研发的水平式热型连铸设备上制备Al-1％Si合金线材的试验研究，分析型口温度、连铸速度及冷却能力等工艺参数对铸锭表面质量的影响，提出了制备Al-1％Si合金的优化工艺参数。同时，利用本试验制备的Al-1％Si合金线材和传统铸造多晶Al-1％Si线材作试样，分析两者的室温拉伸性能。结果表明，热型连铸制备的Al-1％Si合金线材和传统铸造多晶Al-1％Si线材相比，屈服强度提高41．4％，屈强比提高37．8％，伸长率提高49．1％，并具有良好的导电性能。     

ZL201合金挤压铸造薄壁筒形件的组织与性能

采用挤压铸造工艺加工出了ZL201合金薄壁筒形件，并对其组织与性能进行了研究。结果表明：ZL201合金适合于用挤压铸造工艺生产薄壁中、小型工件；经济压铸造工艺加工出的薄壁筒形件几乎没有铸造缺陷，强度比砂型铸造提高约54％，伸长率提高约17％，显微组织比砂型铸造细密均匀。在挤压铸造过程中，薄壁筒形件的塑性变形由外向里进行，显微组织呈梯度变化。     

应用烟气分析直接出钢模式的冶金效果

马钢120 t转炉应用烟气分析动态控制技术冶炼低碳钢，终点碳和温度命中率达到88.6％，实现不倒炉直接出钢新模式。与倒炉测温取样补吹出钢传统模式相比，其冶炼周期缩短4～6 min，钢水终点φ（O）低（200～300）×10－6，终点w（P）≤0.012％，终点w（S）≤0015％，残w（Mn）高003％～005％，喷溅率小于4％，吨钢石灰消耗小于50 kg。     

高延伸铝铸件的研制

采用差压铸造压力场铸造工艺，对合金成分和杂质含量作严格控制，加上热处理工艺的调整，可以使铝铸件的延伸率＞１０％。     

机电传动部件Mg-Nd-Zn合金铸造工艺研究

以机电一体化设备的机械传动部件用Mg-Nd-Zn合金为研究对象,采用重力金属铸造(GPC)、重力砂型铸造(GSC)、低压金属型铸造(LPC)和低压砂型铸造(LSC)4种不同的铸造方式,研究了铸造工艺对合金显微组织、拉伸力学性能和疲劳行为的影响。结果表明,4种铸造工艺下的合金中,GSC合金的屈服强度最低,LPC合金的屈服强度最高;4种铸造工艺下合金疲劳强度的差异性不大;GPC和GSC两种工艺下疲劳强度的波动幅度较小,均为4 MPa,而LPC工艺下的波动幅度最大,LSC铸造工艺下的疲劳强度波动最小。     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.     

Formulas of Tension of Continuous Rolling Process

The development of computer controlled continuous rolling process calls for a mathematical expression that can express the inequality condition of "constant flow". Tension is the link of the continuous rolling process. From the condition of dynamic equilibrium, a differential equation of tension is given out. On the basis of the physical rules established from the industrial practice and experimental studies, the law of volume constancy, the linear relation of forward slip and tension, the state equation of continuous rolling, the formula of dynamic tension, and the formula of static tension have been obtained. These formulae reflect the functional relations between tensions, thickness, roll velocity, and time in the continuous rolling process. It is implied that the continuous rolling process is a gradually steady, controllable, and measurable dynamic system. An assumption of predicting the thickness of a steel plate using these tension formulae is also put forward.