Analytical method for promoting process capability of shock absorption steel

Mechanical properties and low cycle fatigue are two factors that must be considered in developin gnew type steel for shock absorption. Process capability and process control are significant factors in achieving the purpose of research and development programs. Often-used evaluation methods failed to measure processyield and process centering ; so this paper uses Taguchi loss function as basis to establish an evaluation methodand the steps for assessing the quality of mechanical properties and process control of an iron and steel manu-facturer. The establishment of this method can serve the research and development and manufacturing industry and lay a foundation in enhancing its process control ability to select better manufacturing processes that are more reliable than decision making by using the other commonly used methods.     

Development of Auto Sheets in Baosteel

The development trends of auto sheets in recent years are summarized with regard to the envirorunental regulations, market demands and strategy of the steel industry. The growth of domestic auto industry and demands for auto sheets are also briefed. The current status of development of Bake hardenable steel, Isotropic steel for outer panels and Transformation induced plasticity steel, dual phase steel for structural parts in Baosteel is introduced and the future of auto sheets in Baosteel is forecasted.     

The latest progress in research of plastics processing technology

Plastics industry has an important influence on the light industry, and every innovative research of the plastics processing technology will promote the progress of technology in this industry. The plastics processing technology based on the elongational rheology is another technology innovation on the basis of plastics dynamic processing,which realizes the plastics processing mechanism dominated by shear deformation to elongational deformation. As compared with the conventional plastics processing equipment, the new technology and equipment has a series of excellent performances such as increasing the stability of plasticating and conveying process, shortening thermo-mechanical history, reducing energy consumption, and improving mixing and blending effect, etc., which has being gradually applied into plastics extrusion, injection molding and plastics modification processing, and is especially playing an important role in biomass composite materials processing for which the conventional technology and equipment are not suitable, which is of significance in motivating the development of our country's plastics processing and plastics machinery industry, and promoting the technical progress of the plastics processing engineering science and technology.     

Processing investigation and optimization for hybrid thermoplastic composites

A thermoplastic based composite material is suitable for automobile and aerospace applications. The recyclability of thermoplastic and clean processing further enhance its use. The only limitation encountered in using this material is its high-melt viscosity. Various techniques have been developed to overcome this problem. Commingled materials are one of such methods adopted for making proper use of thermoplastic. A major problem observed during the use of a commingled material is its de-commingling, wherein, the uniform distribution of fiber and thermoplastic yam gets disturbed and affects the final quality of the composite. The effects of the braiding process on laminate quality were investigated. Flat plaques were produced by braiding the commingled yam, using a 48-carrier braiding machine. The braids (and control woven samples) were subsequently heated and consolidated in a nonisothermal compression molding operation. Prior to the manufacture of the ‘best quality’ plaques, a series of moldings were produced under different consolidation conditions, to study the dependence of properties on the process variables. This enabled a processing window to be established for each material and helped to separate the respective effects of yam handling, textile processing, and consolidation on laminate properties.     

Study on Quality Evaluation Model in Multi-station Assembly Processes

Based on features of dimension variation propagation in multi-station assembly processes, a new quality evaluation model of assembly processes is established. Firstly, the error source of multi-station assembly system is analyzed, the relationship of dimension variation propagation in multi-station assembly processes is studied and the state equation for variation propagation is constructed too. Then, the feature parameters which influence variation propagation and accumulation in multi-station assembly processes are found to evaluate quality characteristic of the assembly system. Through the derivation of equation on dimension variation propagation, station coefficient matrices which are combined and conversed to determine the max eigenvalue are educed. The max eigenvalue is multiplied by the weight coefficient to establish the quality evaluation model in multi-station assembly processes. Furthermore, assembly variation indexes are proposed to judge of the assembly technology process. Finally, through the practical example, the application of the model and assembly variation indexes are presented.     

钢铁冶金过程的可视化与仿真

Steel production involves the transfer and transformation of material and energy at different levels, structures, and scales, and this process incurs substantial information in the material and energy dimensions. Given the black-box feature of iron and steel production processes, process visualization plays an important role and inevitably benefits parameter correction, technical support decision-making, personnel training, and other aspects of the steel metallurgy industry. The technological characteristics of the entire process in the steel industry were analyzed in this study, a visualization technology route based on virtual reality (VR) was built, and the important components of visual simulation system for steel industry and the important technical points needed to realize the system were proposed. On the foundation, a visual simulation model for the process scheduling of the iron and steel enterprise raw materials’ field, slab, and hot rolling processes was built, and a visualization simulation platform of the iron and steel metallurgy plant-wide process, including ironmaking, steelmaking, hot rolling, and cold rolling, was developed. Lastly, the effectiveness of platform was illustrated by practical application.     

AN INVESTIGATION OF MODELLING ON DRAFTING PROCCES OF WOOLLEN GILL MACHINE

The combing process of gill machine is an important link in the wool spinning technology.Inorder to improve the quality of products,it is necessary to study the new autoleveling device whichuses the modern control theory and microcomputer science.We have to set up a mathematicalmodel for object:As the woolen yarns (both input and output) are complex random process,it issuitable for CARMA (controlled autoregressive-moving average) to describe the object by meansof time series analyses of models.     

Land potential appraisal for urban land reserve based on GIS：

With the rapid urbanization, land banking has become an important means for rational land use and land configuration optimizing. Rational urban land reserve and supply plan are keys for an urban land banking. GIS has been used to model urban growth, growth at the ruralurban fringe specifically. This paper identifies that the urban land banking potential can be evaluated based on RS and GIS technology. 10 indicators were chosen in the integrated index system. As a case of Metropolitan area in Chongqing, urban land banking potential was evaluated based on RS and GIS technology. With GIS, two steps can help to finish potential analysis of land banking. One is goal driven process, such as the process of planning and definition; the other step is datadriven process, such as the process of Manipulating. The results are used to establish the current land banking plan.      

Research of 1 770 MPa galvanized steel wire for stay cable of domestic bridges

This paper focuses on introducing the manufacture technology of 1 770 MPa galvanized steel wires for stay cables applied to domestic bridges. During the development practices of high strength galvanized wire for stay cables used in Sutong Bridge, Baosteel has established three key technologies based on research of manufacture technology and technical innovation. The three key technologies are： ＂Double Tensioning ＋ limiter die＂ process, ＂dominant process ＋ fine adjustment＂ in integrated optimization technology and ＂three-level control＂ in hot dip galvanization. With these key technologies, Baosteel has produced 1 770 MPa galvanized wires for stay cable, which has high tensile strength, low relaxation and good torsion performances.     

Integration of Radio-Frequency Identification and 4D CAD in Construction Management

In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.     

Consideration of green intelligent steel processes and narrow window stability control technology on steel quality

In order to promote the intelligent transformation and upgrading of the steel industry, intelligent technology features based on the current situation and challenges of the steel industry are discussed in this paper. Based on both domestic and global research, functional analysis, reasonable positioning, and process optimization of each aspect of steel making are expounded. The current state of molten steel quality and implementation under narrow window control is analyzed. A method for maintaining stability in the narrow window control technology of steel quality is proposed, controlled by factors including composition, temperature, time, cleanliness, and consumption(raw material). Important guidance is provided for the future development of a green and intelligent steel manufacturing process.     

钢铁工业逆向供应链服务过程模型

根据钢铁工业逆向供应链流程,分析了钢铁工业逆向供应链及其服务的基本定义和三个服务主体的特征。在此基础上,构建了一种二层级三维度钢铁工业逆向供应链服务过程模型。在服务抽象维、服务组织与协同运作维、服务网络跨级控制与服务增值维等三个维度构成的空间里,完成由服务方案匹配与决策实现的三阶段构成的第一级服务响应以及由服务功能实现的两阶段构成的第二级服务响应过程。探讨了服务过程实现中的服务模块化、服务知识获取与共享、服务模块智能匹配等关键技术。以某钢铁企业废钢逆向供应服务为实际应用案例,验证了模型的可行性。     

钢铁工业智能制造的集成优化

 钢铁工业智能制造的目的，是围绕钢铁流程功能，进行结构优化与程序优化，实现全流程动态有序、协同连续运行和多目标整体优化。介绍了钢厂结构优化和程序优化的主要内容和需要研发的关键技术，包括产品质量闭环管控、一体化计划调度、物质流能量流协同和多工序协调优化。提出了钢铁工业推进智能制造需要突破的一些共性问题和实施路径。     

Intelligent logistics system of steel bar warehouse based on ubiquitous information

Internet of Things and artificial intelligence technology are the key elements of the intelligent construction of iron and steel production warehouse. This paper puts forward a whole set of intelligent scheme for bar warehouse crane for the guidance of metallurgical process engineering, including cluster rapid self-awareness technology of the smart crane, precise self-executing technique of crane with rigid-flexible hybrid structure, multi-body system kinematics model of the smart crane sling and the swing characteristics model at different azimuth, antiswing control technology based on the optimization objective function, the vehicle model recognition system based on lidar, and the clustering crane dynamic scheduling method based on multi-agent reinforcement learning. The complete intelligent logistics system of the bar warehouse has changed the original operation mode of the warehouse area and realized the unmanned operation and intelligent scheduling of the crane,which is of great significance for improving the production efficiency, reducing the production cost, and improving the product quality.     

低碳减排的绿色钢铁冶金技术

 低碳减排是钢铁行业面临的最紧迫问题。回顾了国际钢铁工业环境治理、低碳减排技术研发现状,分析了低碳减排的重要发展趋势。高炉-转炉流程应重点发展以氢代焦为代表的低碳高炉炼铁技术,而特钢系统则应以发展富氢气基竖炉直接还原技术为主。特别指出,基于碳捕集和利用（CCU）思想,利用冶金废气制造化工产品是高炉-转炉流程最彻底、最合理、最可持续的减排方式,应当汇聚冶金、化工、能源、信息等行业的技术力量,实施碳排放趋零的钢铁-化工-能源一体化网络集成项目,即神威CCU项目（SCENWI CCU）,加紧冶金废气的捕集、输送、处理和化工工艺与产品开发。同时,发挥中国优势,基于工业互联网平台,建设冶金-化工-能源三大系统密切结合、协同管控、稳定运行的智能制造网络系统,解决系统的复杂性、动态性、波动性等关键瓶颈问题,支持钢铁行业碳排放问题的彻底解决,促进钢铁行业可持续、高质量发展。     

钢铁厂生产过程制造执行系统

结合钢铁生产过程的特点 ,研究了流程工业MES的体系结构、系统功能 ,提出了具体的实施方案 .在某钢铁企业实际应用 ,实现了节能降耗 ,提高了管理水平 ,产生了较好的经济效益 .     

电站锅炉用耐热钢X10CrAl18板材的研制

介绍采用电弧炉冶炼，加强脱氧操作，减少氧化铝夹杂，研制的X10CrAl18铁素钢体不锈钢，针对该钢晶粒易于粗化的特点，通过采取低温加工的方法，达到了细化晶粒的目的，得到了细晶组织．并通过采用合理的冷轧变形工艺，有效地控制了板材质量钢的塑性得到明显改善．     

一体化生产过程质量保证体系建立和实施

从全面质量管理的观点出发，简述了现代化钢铁企业一体化生产过程质量管理系统的内容，设计原则，相应的支持软件的开发思想和原理，并结合我国钢铁工业的实际情况说明了一体化生产过程质量管理系统的实施策略及意义。