The hot rolling process for thin plate of CSP of Baotou Steel was studied with the thermal simulation test machine in this experiment. The test results showed that the higher the coiling temperature is, the greater the rolling speed is, the higher the finishing temperature is, the bigger the grain size is after rolling; it is better for grain coarsening to distribute the reduction ratio from big to small. The test results provide the experimental evidence for rolling the qualified base material for cold rolling with the CSP technological conditions.

The hot rolled steel strips products with different specifications for H40 welding socket in most domestic markets are designed with the same C-Mn composition system. Further, the production technologies for special specification of each grade of steel strips are worked out through controlled rolling and controlled cooling process so that the hot rolled steel strips with excellent mechanical properties are manufactured.

The protective shed at bottom floss hole of flue collector is one of the necessary safety technical measures in the construction of medium repair of converter. In this paper, such series of process as its functional orientation, design of structural style, modeling of wear-stress as well as analysis and checking calculation is discussed in detail. The purpose is to make its carrying capacity visual and quantitative as well as easy to be mastered for operators so as to create an example of standardized operations for the similar projects in future, which is of great significance for improving the operating efficiency of converter in medium repair and the level of safety protection.

In this paper, it is introduced the classification, mechanism and characteristics of film formation for polyurethane waterproof paint, analyzed such problems as precipitation, film formation, air pockets caused by bad bond with base it and the paint is too thick in the applications of polyurethane waterproof paint as well as proposed the corresponding preventive measures. Moreover, its applications in such fields as civil architecture, subway, railway bridge, water conservancy and hydropower engineering are elaborated. It is pointed out that it must be developed in the direction of green environmental protection, high performance and multifunction in the future.

In this paper, the microstructure and properties of high-strength steel for automobile frame BT610L hot rolled plate and hot rolled pickling plate are compared. The results showed that the grains were refined obviously, the microstructure was the dispersed distribution of a small amount of pearlite on fine ferrite matrix and the grain size was grade of 10.0, the yield strength and tensile strength were increased as well as the elongation was decreased after the pickling process; the impact tests were carried out at different temperatures, the impact toughness value of pickling plate was lower than that of hot rolled plate and their fracture morphologies were both dimple shape fracture.

The enterprise resource planning (ERP) is an advanced information management mode widely applied in modern large manufacturing enterprises. Its functions cover the whole process of productions and operations in enterprises including such as the production planning management, purchasing management, inventory management, cost control, financial management, human resources management and quality management. The cost management system as the primary subsystem of ERP project of Baotou Steel, its purposes are to establish a perfect cost collection system through such related subsystems as the production and marketing, quality, equipment, purchase and salary of ERP system. The objects of cost accounting are refined by the activity-based costing so as to realize the various targets of cost control of Baotou Steel.

In the paper, the harms and causes of the problem that the diesel is not unloading with the emergency braking of locomotive when the valve handle is moved to the position of emergency braking for GKD₂ and DF_7G diesel locomotives are analyzed as well as the corresponding improvement measures are established. The relevant electrical control circuit and corresponding parts are transformed so as to avoid the huge hidden dangers and harms caused by emergency braking of locomotive during normal operations while the diesel is not unloading.

In this article, it is introduced the basic principles and structure of the numerical controlled flame cutting machine as well as mainly analyzed the automatic height adjusting system. This control system is essentially a system of random position and composed of three feedback control loops. The inner loop is negative feedback of current cut-off, the middle loop is voltage feedback and the outer loop is position feedback. The distance between cutting torch of cutting machine and steel plate to be processed is smoothly ensured to be a constant with the system so that the cutting quality is improved and the scrap is reduced.

A large blast furnace needs an overhaul to recover its performances within a generation of furnace life (about 10 years). During this period, several item repairs or medium repairs are needed to eliminate the defects and hidden dangers to ensure the stable and high yield of blast furnace. It is an important part of overhaul or medium repair to replace all or part of the furnace shell. The burn-through furnace shell might be with damping down for rush repair under special circumstances. In this paper, it is mainly introduced how to complete the proceeding tasks fast and efficiently as well as the technical essentials of replacing furnace shell in item repairs and medium repairs so as to achieve the standardized operations.

In the paper, the weldability of Q890D is studied with different welding experimental parameters. The reasonable welding and post-weld heat treatment processes are worked out through comparing the comprehensive mechanical properties and microscopic metallographic structure of welded joints so that their properties can meet the requirements of using product. Moreover, the deposition efficiency, formability of weld bead and change of spatter amount with different process parameters are studied, the sensitivity of welding cold cracks, mechanical properties of deposited metal for welding material and content of diffusible hydrogen for Q890D are tested.