岳阳华中电磁科技有限公司

<正>熔化工部自动加配料称重与炉控专家"岳阳华中致力于为您提高铁水质量,节省人为,提高效益!"一、无线数传遥控微机电磁配铁装置(Y57W/Y系列):用于电炉、冲天炉自动配运金属炉料,自动按配方累计配料,误差自动补偿,超差自动报警,保证铁水质量稳定,称重信号无线数据采集,配料控制无线遥控,系统故障率极低,安装经济简单,维护便捷!使用效果明显:铁水温度普遍提高10²0℃,含碳波动率低于0.1%,废品率     

自动电磁配铁秤

本文总结了自动电磁配铁秤的研制过程,分析研究了自动慢放料的全过程,通过对比实验以及对大量实验数据和曲线的分析整理,找到了提高自动配料精度和速度的有效方法(如高压吸料、二级放料等)以及排除生产现场各种“干扰”的措施。本文介绍了实验方法,并对影响自动配料精度和速度的主要工艺因素作了探讨和分析,从而为进一步研制自动电磁配铁秤定型产品提供一定理论和实验的依据。     

常数配料计算法

提出了先称料装炉后计算的配料计算方法,解决了较大块度炉料的配称问题,用于以重溶为特征的熔化法生产合金材料的配料计算。     

水钢4^#，5^#烧结机工程的设计特点

水钢4#,5#烧结机工程具有当今国内先进水平的工艺技术和装备.采用了计算机自动称量配料、返矿配料工艺,强化混合造粒功能的二次混料工艺,高负压、大风量、铺底料和厚料层的烧结技术,烧结矿热破碎后不经热振筛,直接进入环冷机冷却,冷烧结矿不经冷破碎,直接进入两段筛分的整粒工艺流程,生产过程采用了先进的自动检测和自动控制系统.笔者从设计的角度,阐述了水钢烧结机工程的设计特点,可供类似工程借鉴、参考.     

Y57微机电磁配铁装置

Y57微机电磁配铁装置,与吊车配套用于冲天炉、工频炉、电炉进行自动称量配运各种铁炉料。该产品样机已在国内多家工厂进行生产验证,稳定、可靠,抗干扰的能力强。使用该装置,一种铁料连配五次平均误差小于3％,每次平均时间小于20秒。为满足大吨位冲天炉等需要,设有自动累计配料系统。     

含铁回收料综合利用实践

目前炼钢尘泥等废料的使用方式主要有脱水制饼、拌和法、浓缩喷浆法、直接使用法。本钢板材原料厂充分利用精矿仓库现有条件,对炼钢尘泥、氧化铁皮、钢渣粉等含铁回收料使用拌和法进行混合,努力提高混匀配料的质量,使其作为混匀料或一次配料的一个品种。文章介绍了本钢板材公司回收混合料配料思路及配套系统改造,通过采取提高混合料配料质量的控制措施,减少了混匀料配料及烧结配料的品种,提高了混匀料及烧结矿的质量,解决了以往大量占用场地的难题,指出了本钢目前还存在的问题及下一步尘泥等废料的使用规划。     

PLC应用于铸造冲天炉自动加料系统

本文介绍了Ｃ２００Ｈ型ＰＬＣ在熔化冲天炉的炉料加料自动称量系统中的应用。设计了由可编程序控制器控制天车磁盘的电压，进而控制吸料的重量，并具有误差补偿功能的自动称量控制系统。     

湖南华中天地环保科技有限公司

<正>中国铸造加配料与炉控专家!冶金铸造消烟除尘专家!湖南华中天地环保科技有限公司(岳阳华中电磁科技有限公司)120名优秀员工三十年服务铸造行业,专注于电炉、冲天炉自动化机械化加配料系统、冶金铸造消烟除尘系统,是我国行业领军企业,技术领先,产品优质,服务周到持久,享誉国内外!尤其在电磁盘自动配料、电炉自动加配料与监控管理、电炉消烟除     

微机控制自动物料配比系统的开发

介绍了利用配料控制器CB920及可编程控制器PLC开放的微机控制自动物料配比系统，可以根据生产工艺的要求设定各种物料的混合比例，并实现自动定量送料与混合，有效地保证了配料质量，提高了劳动生产率。     

生料浆自动配料系统工业试验

文章介绍了生料浆自动配料系统工业试验的详细过程。     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

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 Rare Earth Doping on Impedance,Modulus and Conductivity Properties of Multiferroic Composites:0.5(BiLa_xFe_(1-x)O_3)–0.5(PbTiO_3)

The Lanthanum-doped bismuth ferrite–lead titanate compositions of 0.5(Bi LaxFe1-xO3)–0.5(Pb Ti O3)(x = 0.05,0.10,0.15,0.20)(BLxF1-x-PT) were prepared by mixed oxide method.Structural characterization was performed by X-ray diffraction and shows a tetragonal structure at room temperature.The lattice parameter c/a ratio decreases with increasing of La(x = 0.05–0.20) concentration of the composites.The effect of charge carrier/ion hopping mechanism,conductivity,relaxation process and impedance parameters was studied using an impedance analyzer in a wide frequency range(102–106Hz) at different temperatures.The nature of Nyquist plot confirms the presence of bulk effects only,and non-Debye type of relaxation processes occurs in the composites.The electrical modulus exhibits an important role of the hopping mechanism in the electrical transport process of the materials.The ac conductivity and dc conductivity of the materials were studied,and the activation energy found to be 0.81,0.77,0.76 and 0.74 e V for all compositions of x = 0.05–0.20 at different temperatures(200–300 °C).     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

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.     

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.