模架企业定制化制造业务管理系统研究

现代模架生产主要是按客户订单安排生产.本文通过对国内模架制造企业定制化生产业务链的分析,探讨了报价业务数据流过程及数据信息在不同部门间的共享集成,并采用B/S三层结构模式和SQL Server数据库技术,开发了应用于模具企业的定制化制造业务管理系统,详细阐述了系统模块构成及主要模块的实现.     

基于DNN的中厚板组织性能逆向优化系统及应用

产品性能是热轧钢材生产的重要指标。生产工艺参数的调整和新产品的研发都需要较长的调试周期，容易造成产品性能的不稳定、研发成本过高等问题。为解决上述问题，进一步优化工艺，缩短研发周期，基于深度神经网络和规则期望算法，建立了中厚板组织性能逆向优化模型，对神经网络框架进行了选型以及超参数调参。基于某钢厂中厚板生产线在线生产数据，使用深度神经网络模型对最终产品性能进行了测试及应用，预测值与实测值的吻合度较高。     

基于客户订单解耦点的大规模定制

在生产和物流的材料流附加值活动中,客户订单解耦点（CODP）是在有关确定的客户需求下所作的决策同需求不确定性下所作的决策相分离的订单渗透点。根据客户订单解耦点,文章提出一种有关大规模定制的决策框架,将设计资源和生产过程整合起来。通过解耦点的适当定位,模型把强调生产率的精益制造和强调柔性响应的敏捷制造组合到创新产品的供应链战略中,形成一种基于延迟产品差异化的大规模定制战略。最后,移动电话的大规模定制案例给出了相关说明。     

基于DNN的中厚板组织性能逆向优化系统及应用

产品性能是热轧钢材生产的重要指标。生产工艺参数的调整和新产品的研发都需要较长的调试周期,容易造成产品性能的不稳定、研发成本过高等问题。为解决上述问题,进一步优化工艺,缩短研发周期,基于深度神经网络和规则期望算法,建立了中厚板组织性能逆向优化模型,对神经网络框架进行了选型以及超参数调参。基于某钢厂中厚板生产线在线生产数据,使用深度神经网络模型对最终产品性能进行了测试及应用,预测值与实测值的吻合度较高。     

面向大规模定制的订单重组方法研究

探讨了大规模定制生产模式下如何快速、有效地进行大批量生产的关键问题.从订单入手,提出订单重组的概念,建立起MC订单重组模型,并对重组算法进行研究.对个性化的客户订单进行重组,得到适合大批量生产的批量订单.使企业可以按照大批量生产方式制定生产计划、部署生产策略,为企业提高生产效率、降低成本提供决策支持.订单重组模型结合具体实例,在浙江某定时器厂家得到了有效应用.     

各种钢铁的焊接

20095199 高强合金钢中厚板双丝焊接接头组织性能／冯日海…／／焊接学报．-2009,30（6）：51-54 针对轻型车辆中厚板高强合金钢高效化焊接特点,基于高效双丝熔化极气体保护焊系统,应用双电弧共熔池熔化极气体保护焊方法,采用奥氏体不锈钢焊丝进行高强合金钢的焊接工艺试验。确定了合适的焊接工艺参数。并对获得的对接接头的显微组织、成分及力学性能进行了分析。     

基于Web的个性化产品定制系统

对基于Web的个性化定制系统的特点、功能及其与CIMS其它子系统的联系进行了分析,建立了基于Web的个性化产品定制系统的整体框架.以客户满意度为指导,探讨了客户需求的获取方法和产品定制的方式.针对客户与企业协同设计的趋势,对客户在产品设计、制造中的协同方法进行了研究.在理论研究的基础上,开发了客户化定制系统原型并进行了初步应用,实现了基于Web从客户需求到满足客户需求和市场的产品的转变.     

各种钢铁的焊接

20095199 高强合金钢中厚板双丝焊接接头组织性能／冯日海…／／焊接学报．-2009,30（6）：51-54 针对轻型车辆中厚板高强合金钢高效化焊接特点,基于高效双丝熔化极气体保护焊系统,应用双电弧共熔池熔化极气体保护焊方法,采用奥氏体不锈钢焊丝进行高强合金钢的焊接工艺试验。确定了合适的焊接工艺参数。并对获得的对接接头的显微组织、成分及力学性能进行了分析。     

河钢唐钢成功开发80mm厚高层建筑用钢

正近日,河钢唐钢中厚板公司首次研发生产的80mm厚Q420GJCZ35高层建筑用钢顺利交到客户手中,得到客户肯定。2月初,该公司取得小批量80 mm厚Q420GJCZ35高层建筑用钢订单。因从未生产过此产品,该公司研发、技术系统迅速研究、摸索,全力开展80mm厚Q420GJCZ35高层建筑用钢的研发生产。     

轧机CAD工程数据库系统的研究与开发

针对轧钢机械设计中使用人工翻译手册，查标准、取数据的方法存在烦琐、低效等问题，提出了借助相应面向对象的数据库开发技术，基于客户／服务顺模式对轧机工程数据进行计算机化管理的方法，并以东北大学国家重点实验室的中厚板四辊轧机ＣＡＤ系统为例，介绍了其中工程数据库的总体设计思想和数据信息的输入、修改、查询以及管理维护管理等技术的开发方法。     

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.     

Thermodynamics Study on the Decomposition of Chromite with KOH

Institute of Process Engineering, Chinese Academy of Sciences, China, has proposed a method for oxidative leaching of chromite with potassium hydroxide. Understanding the mechanism of chromite decomposition, especially in the potassium hydroxide fusion, is important for the optimization of the operating parameters of the oxidative leaching process. A traditional thermodynamic method is proposed and the thermal decomposition and the reaction decomposition during the oxidative leaching of chromite with KOH and oxygen is discussed, which suggests that chromite is mainly destroyed by reactions with KOH and oxygen. Meanwhile, equilibrium of the main reactions of the above process was calculated at different temperatures and oxygen partial pressures. The stable zones of productions, namely, K2CrO4 and Fe2O3, increase with the decrease of temperature, which indicates that higher temperature is not beneficial to thermodynamic reactions. In addition, a comparison of the general alkali methods is carried out, and it is concluded that the KOH leaching process is thermodynamically superior to the conventional chromate production process.     

Influence of Heat Treatment on Damping Behaviour of the Magnesium Wrought Alloy AZ61

The effect of isochronal heat treatments for 1h on variation of damping, hardness and microstructural change of the magnesium wrought alloy AZ61 was investigated. Damping and hardness behaviour could be attributed to the evolution of precipitation process. The influence of precipitation on damping behaviour was explained in the framework of the dislocation string model of Granato and Lücke.     

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.     

Growth Kinetics of Single Inclusion Particle in Molten Melts

On the basis of the single-particle framework, a new theory on inclusion growth in metallurgical melts is developed to study the kinetics of inclusion growth on account of reaction and collision. The studies show that the early growth of inclusion depends on reaction growth and Brawnian motion collision, and where the former is decisive, the late growth depends on turbulence collision and Stokes＇ collision, and where the former is dominant; collision growth is very quick during the smelting process, lessened in the refining process, but nearly negligible in the continuous casting process.     

Theoretical Analysis for the Motion and Temperature of Melt Droplets in Spray Degassing Process

The motion of melt droplets in spray degassing process was analyzed theoretically. The height of the treatment tank in spray degassing process could be determined by the results of theoretical calculation of motion of melt droplets. To know whether the melt droplets would solidify during spraying process, the balance temperature of melt droplets was also theoretically analyzed. Then proof experiments for theoretical results about temperature of melt droplets were carried. In comparison, the experimental results were nearly similar to the calculation results.     

Using Finite Element and Contour Method to Evaluate Residual Stress in Thick Ti-6Al-4V Alloy Welded by Electron Beam Welding

This work was to reveal the residual stress profile in electron beam welded Ti-6Al-4V alloy plates(50 mm thick) by using finite element and contour measurement methods.A three-dimensional finite element model of 50-mmthick titanium component was proposed,in which a column–cone combined heat source model was used to simulate the temperature field and a thermo-elastic–plastic model to analyze residual stress in a weld joint based on ABAQUS software.Considering the uncertainty of welding simulation,the computation was calibrated by experimental data of contour measurement method.Both test and simulated results show that residual stresses on the surface and inside the weld zone are significantly different and present a narrow and large gradient feature in the weld joint.The peak tensile stress exceeds the yield strength of base materials inside weld,which are distinctly different from residual stress of the thin Ti-6Al-4V alloy plates presented in references before.     

Microstructures and Tensile Properties of Ultrafine-Grained Ni–(1–3.5) wt% SiC_(NP) Composites Prepared by a Powder Metallurgy Route

Silicon carbide nanoparticle-reinforced nickel-based composites(Ni–Si CNP),with a Si CNPcontent ranged from1 to 3.5 wt%,were prepared using mechanical alloying and spark plasma sintering.In addition,unreinforced pure nickel samples were also prepared for comparative purposes.To characterize the microstructural properties of both the unreinforced pure nickel and the Ni–Si CNPcomposites transmission electron microscopy(TEM) was used,while their mechanical behavior was investigated using the Vickers pyramid method for hardness measurements and a universal tensile testing machine for tensile tests.TEM results showed an array of dislocation lines decorated in the sintered pure nickel sample,whereas,for the Ni–Si CNPcomposites,the presence of nano-dispersed Si CNPand twinning crystals was observed.These homogeneously distributed Si CNPwere found located either within the matrix,between twins or on grain boundaries.For the Ni–Si CNPcomposites,coerced coarsening of the Si CNPassembly occurred with increasing Si CNPcontent.Furthermore,the grain sizes of the Ni–Si CNPcomposites were much finer than that of the unreinforced pure nickel,which was considered to be due to the composite ball milling process.In all cases,the Ni–Si CNPcomposites showed higher strengths and hardness values than the unreinforced pure nickel,likely due to a combination of dispersion strengthening(Orowan effects) and particle strengthening(Hall–Petch effects).For the Ni–Si CNPcomposites,the strength increased initially and then decreased as a function of Si CNPcontent,whereas their elongation percentages decreased linearly.Compared to all materials tested,the Ni–Si CNPcomposite containing 1.5% Si C was found more superior considering both their strength and plastic properties.