The Rail and Beam Plant of Baotou Steel continually refines the construction of safety management system, follows the principle of "three responsibility and three must", which combines the actual situation of the enterprise and establishes the comprehensive security system of the enterprise. Regarding the safe production responsibility implementation as the breakthrough point to strengthen the safety management and innovate the safety management method, refining the management step by step, perfecting the supervision and responsibility list content, and making a detailed list of on-site dangerous source completely. Supervise and evaluate the daily class supervision and assessment to improve on-site safety management efficiency, continuously eliminate the unsafe factors and unsafe behavior of people, so that we can promote active safety prevention capacity of our staff and form the safety management into a new mode of whole staff self-management, whole staff supervision, dare to manage and good at management.

The paper introduces the production status of railway steel in key domestic enterprises and the future developing direction of railway steel demand. In combination with the steel variety and the production process status of railway-steel that have been developed by Baotou Steel, it is proposed that Baotou Steel should strengthen the investigation of railway steel market, optimize the product mix of railway steel and further strengthen the countermeasures such as developing and applying new technology and speeding up the relevant product certification, so as to create good economic and social benefits for the enterprise while meeting the railway development demand of the thirteenth Five-Year Plan.

By using the MMS-200 thermal simulation tester in laboratory, the transformation and control of abnormal microstructure during rail heat treatment are studied, the influencing factors of abnormal microstructure transformation are analyzed, so as to avoid the generation of abnormal microstructure during the actual heat treatment.

This paper introduces the characteristics of universal mill, the production process of 60AT2 high speed turnout rail by universal rolling and the basic methods and parameters of pass design. It also briefly analyzes the pass design of asymmetrical section, the design of guide equipment and the pass design of straightening. Finally, the product quality of 60AT2 high speed turnout rail production is summarized and analyzed.

In this paper, the BD2 break down rolling process of railway turnout rail in Rail and Beam Plant of Baotou Steel is simulated through finite element modelling (FEM), and the metal flow deformation in rolling process is analyzed as well. The results indicate that the B and C grooves exhibit larger deformation zone in their rail waists, while uniform deformation could be seen in A groove. The equivalent strain of rail waist is larger than that of rail head and base in each pass of BD2.

In this paper, the pass design of HW175 mm × 175 mm hot rolled H-beam is taken as an example to introduce the HW175 mm × 175 mm hot-rolled H-beam produced by X-H rolling method on the UEU reversible continuous rolling mill, the pass design method of finished rolling mill, the pass system selection and pass design method for break-down mill, selection of billet cross-section, as well as the pass design characteristics of producing HW175 mm × 175 mm hot-rolled H-beam by using special-shaped billet.

In this paper, the HN1 000 mm × 300 mm H-beam that produced by Rail and Beam Plant of Baotou Steel is taken as an example to introduce the pass system selection, billet selection and pass design method in the process of large size H-beam design. It also introduces the characteristics of the HN1 000 × 300 H-beam pass design and expounds the rolling process.

In this paper, the cross-section characteristics of 60TY1 turnout rail are analyzed, the pass system selection and pass design are carried out reasonably according to field equipment conditions. The original technical point of view is proved to be correct by the practical verification. The main production process is introduced, and the dimension control accuracy and mechanical property index of finished products are briefly introduced as well, which provide practical examples for technical exchange.

In this paper, the causes of rolling defects in HN700 mm × 300 mm H-beam are analyzed, and the methods of eliminating rolling defects are put forward. By reducing the rolling defects, the yield of HN700 mm × 300 mm H-beam is improved, and the experience of eliminating rolling defects in HN700 mm × 300 mm H-beam is applied to the H-beam production of other specifications.

The smaller the austenite grain in steel is, the better the mechanical properties of structure are after structural transformation. In this paper, the Gleeble-1500D thermal simulator is used to simulate the heat treatment process of rare earth high Nb steel, and the TEM observation and analysis are carried out on the test pieces to study the effect of rare earth on austenite grain size in different holding time. The results show that: Rare earth can effectively inhibit the austenitic grain growth in heating process and play a role in adjusting the grain stability. In addition, rare earth can reduce the temperature of precipitation phase and promote the dissolution of second-phase particles in austenite.

In view of the problems existing in the production process of No. 22 and No. 25 angle steel, the common guide is self-developed, the sliding guide is changed into rolling guide and the pass design and rolling schedule are optimized to avoid the scratch of angle steel leg, guarantee the size of finished product and effectively improve the quality and output of product.

This paper introduces the characteristics of cantilever type straightening machine, and describes the bending, bending deflection and torsion which are easy to produce in the straightening process. It also gives examples for quantitative analysis and summarizes the effective methods.

Germany SMS flat-vertical compound straightener introduced by Rail and Beam Plant of Baotou Steel produces defects such as straighting mark, torsion and straightening asymmetry of rails in the process of straightening rails. In the paper, it is analyzed the cause of defects formation, that is, roll pass of horizontal straightening roll, roll pass of vertical straightening roll and straightening processing have influence on straightening mark, torsion and straightening asymmetry of rails. Through designing reasonable optimization scheme for straightening pass and adjusting the method, the problem of rail straightening defects is solved.

According to the different requirements and focus of standard detection, the ultrasonic flaw detection of rail base metal is now divided into two types: online detection of production line and in service detection of rail track. The detection of primary defects arising from the rail base metal production and the detection of fatigue defects arising from the length of service time after track laying have many differences in main types and key parts of the detected flaws. Through the combination of online detection and in service detection of rail base metal, study the position of fine flaw detection and improve the flaw detection method as far as possible. Only in this way can maximize guarantee the flaw pick-out rate and flaw detection quality of rail base metal detection.

This paper mainly introduces new generation rail manufacturing equipment, its process characteristics and automation control level combined with the process characteristics and equipment characteristics of No. 2 universal rolling mill production line in Rail and Beam Plant of Baotou Steel. In view of the superiority of the equipment, through comparative analysis of the finished rail, this paper expounds the promotion of the product quality control and the finished product performance index, and fully affirms the guarantee ability of new generation equipment to product quality.

At present, inspection of rail surface defects mainly depend on the way of artificial vision detection, but this way has many disadvantages, such as fatigable, slow detection and low detection rate. The rail on-line surface defect detection system obtains high definition rail surface images by high-speed and ultrahigh resolution digital image acquisition technology; the location of defects is accurately located by using image processing and detection technology; the defect geometry and gray feature are calculated by using modern artificial intelligence technology to classify and identify the defects.

During the straightening process of H-beam, the rolling reduction of each straightening roll of straightener directly affects the residual stress and bending of H-beam. In order to reduce the residual stress and bending, meeting the national standard, the orthogonal experiment simulation is carried out on straightening process. According to the experiment, the effect of work rolls on the residual stress and bending of H-beam is obtained, and the optimal scheme for rolling reduction during H-beam straightening is found out.

Hydraulic servo system has the characteristics of large power, fast response and high precision, in which the hydraulic roll gap automatic control system, namely AGC system, is the typical representative of hydraulic technique application in all metallurgical equipment. The stability of system back pressure plays the key role in the action of hydraulic cylinder and the precise control of valve in AGC system, and through the transformation for oil supply way of system back pressure, from the valve relief for oil supply to the pump for direct transformation, makes back pressure is more stable in use.

In the paper, the problem of oil leakage in hydraulic system of rail stamping machine is analyzed, and the design defect on L oil tube of hydraulic system is analyzed by combining the site use condition and detailed calculation. The root cause of oil leakage in hydraulic system is found out, and the solution aiming at this defect is put forward: servo valve in hydraulic system is configured with the separate L oil pipeline to ensure that the return pressure of newly added L oil pipeline is basically zero. Thus the problem of oil leakage in hydraulic system of rail stamping machine for many years is solved.

In the paper, it is expounded the rolling mill house problems existing at present stage in Rail and Beam Plant of Baotou Steel after years of operation, and causes of rolling mill house corrosion are analyzed in depth. Through the comparison of various methods for rolling mill house repair, laser cladding technology is used to repair rolling mill house on line, and the operation condition after repair is summarized and evaluated.

The failure causes of numerical control lathe jitter are complicated: lathe jitter caused by external environment influence; lathe jitter caused by workpiece clamping and workpiece material in the workpiece process; lathe jitter caused by lathe equipment defects. Through summarizing the jitter causes and case analysis, common jitter causes and maintenance ideas in maintenance are put forward and the lathe jitter failure of actual site is solved.

Roller is one of the most important large-scale tools in iron and steel production enterprises, and the amount of roll consumption has the direct impact on enterprises costs. Therefore, reducing roll consumption is an important measure for iron and steel production enterprises to reduce costs. In the paper, the influencing factors of roll consumption of rolling mill in Rail and Beam Plant are analyzed and described in detail from the aspects of roller design structure and strength selection, roller processing and assembly technology, roll usage and so on, and improvement measures are put forward.

In order to realize office automation, improve management level, organize production efficiently and orderly, and maximally share plant resources, Rail and Beam Plant in Baotou Steel has constructed LAN. Through the design of LAN, VLAN re-division, firewall configuration and IP address allocation to achieve the isolation between office network and production network, provide the strong guarantee for information construction in Rail and Beam Plant.

In the paper, it is introduced the successful application of ABB medium voltage frequency converter (ACS6000) in Rail and Beam Plant of Baotou Steel, and the main power module unit of ACS6000 SD system is described in detail. Combined with ACS6000 SD medium voltage frequency converter in speed regulation drive control of synchronous motor in large H-beam line finishing mill, the application characteristics of ACS6000 medium voltage frequency converter and direct torque control and other advanced technologies in synchronous motor are described.

The quality of 100-meter heavy rail refers to the high spot or surface wave produced by the instability of the billet tension, and cross-sectional size and tension are closely related. In the micro-tension control system, the main control thought of metal mass flow being equal is put forward, and the micro tension is controlled by the speed synchronization and the head force arm memory method of universal mill.

In the paper, it is expounded the application of frequency converter in crane of Rail and Beam Plant of Baotou Steel, features and functions of frequency converter, and the selection method of frequency converter for hoisting equipment is introduced. Frenquency converter is applied to crane to realize the soft start of crane and to reduce the impact on grid current. It not only reduces the impact on equipment, prolongs the service life of equipment, saves energy and makes speed regulation more safe and reliable, effectively reducing the production cost of enterprises.

The essence of prestressed string method to repair bending of crane main bea is to use the steel strand to transform the steel structural girder into the prestressed string steel structural girder. It has advantages that the elastic strength amplitude of steel can be sufficiently and repeatedly utilized, thereby improving the bearing capacity of structure. Through more than four years practice after repair in Rail and Beam Plant of Baotou Steel, the application of this method is the good solution to solve the problem in bending of crane main bea, and provides technical support for repairing and recycling of bridge crane that exists girder bending defect, saving the cost of maintenance, restoring and enhancing crane performance and ensuring safety production.