The effects of surface morphology for cold rolled automobile steel on the morphology, compactness and phase composition of phosphating film are very important, but there would be inevitably some scratches in such processes as packaging and transportation. The effects of artificial scratches on the surface roughness, morphology of phosphating film and phase composition of cold rolled automobile steel DC04 are analyzed with such test equipment as the surface roughometer, scanning electron microscope and x-ray diffractometer. The results showed that the average value of surface roughness R a was 1.124 μm for mother blank of DC04, average value of peak density R P c was 76.5 cm^-1, R a basically unchanged and R P c decreased slightly after artificial grinding; R a of all samples for DC04 changed a little, but R P c increased slightly compared with those before phosphating; local structure of phosphating film on the surface of sample with artificial scratch was discontinuous, content of incompact zinc phosphate tetrahydrate, Zn₃(PO₄)₂·4H₂O in the phosphating phase was 100%, content of compact zinc ferrous phosphate tetrahydrate, Zn₂Fe(PO₄)₂·4H₂O and value of “P ratio” were zero, so the phosphating effect was poor.

In the paper, the production technology and technological improvement for 500 MPa cold stamping automobile axle housing steel plate are elaborated, the chemical components of Nb, Ti, Cr and Mo as main strengthening elements are designed as well as a series of whole production technology including smelting, continuous casting, heating, rolling and cooling is formulated. The steel plate is with such comprehensive properties as high strength and ductility and toughness, complex cold stamping without cracking as well as small thickness fluctuation on one plate and anisotropy. Its production technology is mature and stable so that the probability of cracking in cold stamping process is greatly reduced, which could meet the technical requirements of automobile axle housing steel and the processing cost is reduced.

With the axle load and transport volume of train increase year by year, it’s necessary to use new type high strength rail to satisfy the operating requirements, prolong the service life of rail and reduce the maintenance of railway. The third generation of rare earth heat-treated rail is successfully developed by Baotou Steel through researching the composition optimization and heat treatment process of rare earth rail. Its tensile strength R_m≥1 300 MPa, percentage elongation after fracture A≥10%, tread hardness HB is 380~430. The experimental study showed that the rare earth was easy to attach to the inclusions in high carbon steel rail so that such inclusions as MnS and Al₂O₃ were modified; simultaneously, the lamellar spacing of pearlite was reduced and austenite grain size was refined by rare earth so as to improve the toughness of high carbon heavy rail steel. The wear resistance and contact fatigue resistance of rail could be significantly improved with new type heat-treated rare earth rail, which is suitable for heavy haul railway and section with small curve.

The smelting and rolling of hot rolled U75V rails with different contents of rare earth Ce are carried out in laboratory. The low temperature impacting property and fracture toughness of the rolled rail are compared and analyzed. The test results showed that the impact toughness of rail at room temperature could increase by about 30%, low temperature impacting property at -60 ℃ could increase by about 60% after add 0.005 6% rare earth Ce into hot rolled U75V rail; the average value of -20 ℃ K_IC of rail increased by about 14% and the average value of -60 ℃ K_IC of rail increased by about 15% so that the addition of rare earth Ce could further improve the low temperature toughness of hot rolled U75V rail.

In this paper, the three dimension(3D) modeling software is used to design the funnel-shaped fossula rotunda at iron notch suitable for large blast furnace, the manufacture method of funnel-shaped fossula rotunda at iron notch for monoblock casting is summarized as well as its technical characteristics and application in 7^# and 8^# blast furnaces of Baotou Steel are introduced. The experiment results showed that the service life of funnel-shaped fossula rotunda for monoblock casting was greatly improved and labor intensity of furnacemen was reduced, which were to the benefit of stable and trouble-free operation of blast furnace.

In the paper, it is summarized the necessities of establishing statistical system for archives by analyzing the current situations and existing problems of archival statistical work in group company as well as elaborated the archives management system in detail from such four aspects as the function design, technical route design, practical application and prospect combining with some experiences of the statistical management of archives in Baotou Steel. The human and material inputs are saved as well as the costs of archives management for group company are reduced through the standardized management and networking applications of statistical system for archives in group company.

The digital analysis system for enterprise finance collects and extracts data from the enterprise resource planning (ERP) information system, yonyou NC system and Internet industry to build the data analysis set of enterprise finance. The financial data is analyzed and mined with the data analysis technology combining with the financial model and financial business; the financial indexes and analysis results are displayed adopting the visual data display technology. The system provides the comprehensive, intuitional and visual analysis means of financial data for the financial staff of enterprise as well as the means of assistant analysis and decision making for operating management finance of manager in enterprise.

In the paper, the realization process and approaches of cost system in company are elaborated in detail by taking Qinghua Co. of Baotou Steel as an example. The accurate cost accounting and efficient cost management are realized with the cross-platform and cross-system modes the first time so that work procedures of cost business personnel are simplified and working efficiency is greatly improved. This mode is convenient, fast, efficient and with specific task allocations, which provides the feasible references for successfully implementing other subsequent information management systems.

With the information construction of iron and steel enterprises, more and more data are generated in each link of logistics for crude fuel in iron and steel enterprises. The process of logistics for crude fuel relates to the safety of inventory for crude fuel and utilization ratio of storage space. In order to further improve the utilization of data, the real-time collection and monitoring of logistics data are particularly important. Therefore, the visual management of logistics process could intuitively show the connection and trend among information. In the paper, the applications of visual data management in logistics management of crude fuel in iron and steel enterprises are discussed by taking the construction of visualization system of logistics for crude fuel of Inner Mongolia Baotou Steel Union Co., Ltd. as an example.

The expense allocation of auxiliary production unit of Inner Mongolia Baotou Steel Union Co., Ltd. is studied in detail. The expenses are allocated to all the units based on their nature and actual services provided. As a result, each unit knows the expenses they bear more clearly, intuitively and transparently, which could provide the reference for auxiliary units to better provide market-oriented services next. At present, this method has been applied to the monthly cost accounting of company and the effects are good so that all units pay more attention to the cost control.