In this paper, the fluctuation of impact energy for Q690 steel plate with large thickness of 80 mm are analyzed. The low temperature impact tests of samples taken from different positions of plate thickness are carried out as well as their fracture and microstructure are compared and analyzed with scanning electron microscopy and metallographic microscope. The differences of impact energy at different positions of plate thickness are great, which are 14.9 J in the center, 27.2 J at the quarter part and 95.4 J near the surface. The corresponding microstructures are coarse tempered bainite and a small amount of tempered sorbite structure with orientation of martensite in the center, tempered sorbite and bainite structures with orientation of martensite at the quarter part as well as fine tempered sorbite structure with orientation of martensite near the surface. The analysis results showed that the main cause for fluctuation of impact energy was the differences of microstructure and grain size. The experiment showed that the higher the proportion of bainite in microstructure, the larger the grain size and the lower the corresponding impact energy. Based on the CCT(continuous cooling transformation) curves of Q690 steel, it is analyzed and judged that insufficient cooling during quenching process causes insufficient cooling speed from the quarter part to the center of steel plate due to the larger thickness specification of Q690 steel plate so that the whole martensitic structure could not be obtained after quenching, microstructure in the direction of plate thickness is uneven, especially different proportions of bainite structure appear at the quarter part and in the center of plate thickness, which cause the fluctuation of impact energy. The uniformity of microstructure for Q690 steel plate with large thickness specification is improved so that the impact energy and its stability are improved by optimizing on-site quenching and tempering process.

The scientific research innovation management system of Baotou Steel, taking the Management Methods for Scientific Research Projects of Baotou Steel as business framework, covers such five modules as declaration management of scientific research projects, contract management, acceptance management, result management and expense management. As a result, the on line management of the whole process from project approval, accreditation, acceptance and concluding project to results declaration after completing project for scientific research projects of Baotou Steel is realized as well as expense budgets and actual performances of scientific research projects could be controlled according to organization, project and time.

The deformation characteristics in rolling process are analyzed through calculating the changes of temperature, strain and external dimensions during the deformation process of H beam with bilinear hardened material model by taking HW300×300 as the typical case. The calculations are with the thinking of all process and calculation method of thermodynamic couple, process temperature is used as deformation temperature of rolled piece as well as the effects of uneven temperature of cross section are taken into full consideration so that the calculation results are more close to actual situations, which provide the reliable basis for process optimization. The calculation results showed that there was necking near the trigonum on waist of H beam due to inhomogeneous deformation, local deformation at flange end would cause precision of flange width to change as well as rolling deformation work would transform into heat energy so that internal temperature of rolled pieces would rise.

The applications of rare earth elements in steel materials play an important role in optimizing their performances. In the paper, it is introduced a type of reinforced wear resistant steel with rare earth TiC particle is prepared by taking rare earth element Ce as main additive as well as systematically discussed the effects of finish cooling temperature on its microstructure and wear resistance. The microstructure analysis indicated that the Ce element could effectively refine the TiC particle with long strip and chain shape in as-cast structure during solidification process as well as the content of retained austenite could be reduced with finish cooling temperature decreased during rolling process. The abrasion test showed that the microalloying TiC particle with rare earth element Ce could effectively prevent abrasion so that the wear resistance of plate could be improved.

The exploration for effects of rare earth (RE) on phase transformation of Fe-based alloy is significant in the development process of advanced high strength steel containing RE. In the paper, the effects of La and Ce on martensite phase transformation of steel are studied from such two aspects as driving force and minimum energy path (MEP) using first principles calculations. The calculations of formation energy revealed that the stability of fcc-Fe was increased and stability of bcc-Fe was decreased through substitution of RE for part of Fe atom so that the driving force of martensite phase transformation was decreased. Meanwhile, the analysis on generalized solid-state nudged elastic band method indicated that there would be an additional energy barrier when phase transformation went on to the FM state with ratio c/a of 1.14 along Bain transformation path in the system containing RE, which was related to the sudden decrease of magnetic moment caused by the hybridization between atomic orbital of RE and nearby atomic orbital of Fe.

The SS steel grade rail with 60E1 cross section is manufactured with small batch production by comparing the rails with 60E1 and 115RE cross sections, optimizing chemical composition, adopting narrow composition control, increasing C content, controlling contents of Mn and Cr as well as optimizing rolling process. The rail performances could reach R_p0.2≥512 MPa,R_m≥982 MPa,A≥10% and tread hardness (HB) ≥310. The small batch industrial production practices prove that the production process of SS steel grade rail with 60E1 cross section is trouble free and its performances are stable, which could meet the user needs so that it can be produced with incremental quantity.

The 5×××series aluminum alloy belongs to Al-Mg alloy system and Mg is its main element, which is a type of wrought aluminum alloy. The 5××× series aluminum alloy is with better corrosion resistance and is often as rust-proof aluminum alloy, which is widely used in the field of off-shore building. It is also with such advantages as light weight and high strength as well as is also widely used in the fields of automobile parts manufacturing and ship structure making. In this paper,the research progress for the effects of alloying elements and heat treatment process on comprehensive properties of 5××× series aluminum alloy in recent years is summarized as well as the effects of rare earth elements on microstructure and properties of 5××× series aluminum alloy are mainly analyzed, which provide the theoretical guidance for subsequent research and development of 5××× series aluminum alloy with higher comprehensive mechanical properties.

The transformations of scientific and technical achievements for colleges and universities play an important role in supporting and promoting the national economic construction and social development as well as the transformations of scientific and technical achievements for colleges and universities in western ethnic minority region are with its own development characteristics. In the paper, the transformations of scientific and technical achievements for metallurgy universities in western ethnic minority region are analyzed from multiple perspectives such as the quantity, amount of money, subject distribution and cycle of achievement transformation based on the data of achievement transformation for a university in western ethnic minority region in 2020-2022, which could provide references for transformations and applications of scientific and technical achievements in western ethnic minority region.

In this paper, it is introduced the online accelerated cooling process test of a type of hot rolled C-Mn seamless steel pipe in 460 production line of Baotou Steel Pipe Co., Ltd.. The test results showed that the effects of online accelerated cooling process on microstructure and properties of test steel were significant, generation of proeutectoid ferrite in two phase region could be restrained by online controlled cooling so that the matrix grains were refined as well as grain size was increased from level 6.5 under non controlled cooling conditions to level 8 and the banded structure of steel was improved. The mechanical properties and impact properties of steel pipe are significantly improved, the yield strength could reach 300~345 MPa, tensile strength could reach 485~545 MPa, average value of longitudinal impact energy at room temperature could reach 102 J, average value of longitudinal impact energy at 0 ℃ could reach 86 J and average value of longitudinal impact energy at -20 ℃ could reach 60 J.

The effects of MgO on rheological property of blast furnace slag of Baotou Steel are analyzed by preparing slag specimen with pure chemical reagent under N₂ atmosphere based on the 4^# blast furnace slag of Baotou Steel under laboratory conditions and crude fuel conditions of blast furnace ironmaking production of Baotou Steel. Moreover, the effects of MgO on melting property and enthalpy of blast furnace slag of Baotou Steel are also explored. The results showed that the MgO content of slag was increased from 8.00% to 13.00%, melting temperature of blast furnace slag of Baotou Steel was on the rise, viscosity and viscous flow activation energy showed a trend of first decreasing and then increasing, fluidity and thermal stability of slag became first good and then poor under experimental conditions. In addition, the characteristic temperature of melting property for blast furnace slag of Baotou Steel shows a trend of first decreasing and then increasing as well as enthalpy of slag shows a trend of increasing with the increase of MgO content of slags, which show that the heat storage capacity of slag in blast furnace hearth is enhanced. The MgO content of blast furnace slag of Baotou Steel is suggested to be controlled at 10.00% by comprehensively considering the experimental study results, relevant theoretical calculations and control level of MgO content of existing blast furnace slag of Baotou Steel.