The robot has wide application scenarios in industrial field. In this article, the advantages and disadvantages and applicable scenes for inspection robots with different structures are discussed; structure and such key technologies as motion control of self-propelled orbit type inspection robot are mainly studied; frame structure, such modules of constituting inspection robot as main control system, control device of motion and walking, signal pickup assembly of vision and sensor, power management (charging device), wireless communication system and auxiliary functions and hardware design of corresponding modules are introduced; motion control method with proportion integration differentiation (PID) control technology of inspection robots and motion control optimization method of inspection robot with the technology of artificial neural network are studied; detection method of motion track for inspection robot based on radio frequency identification (RFID) technology is discussed; applications of inspection robot in industrial field are briefly introduced finally. The movement velocity and stability of inspection robot are improved so that its movement process is effectively optimized with the technologies and methods described in the paper, which could provide the technical support for applications of inspection robot in industrial field.

The intelligent steelmaking system for converter integrating neural network and artificial intelligence deep learning technology is developed by taking the 1^# converter of Baotou Steel as research object aiming at such problems as dependence of manual experiences, low intelligence as well as insufficient stability of production efficiency and quality of liquid steel for traditional converter steelmaking. The real-time judgment of converting state, accurate prediction of end point carbon and temperature as well as intelligent collaborative regulation and control of oxygen supply-oxygen lance position are realized by integrating such multi-source heterogeneous data as vision of flame at converter mouth, flue gas analysis and audio testing as well as establishing the dual-drive model of “mechanism-data” combining with such algorithms as the CNN, Bi-LSTM and reinforcement learning. The industrial tests showed that the dual hit rates of end point carbon and temperature for converter were increased to over 90%, smelting cycle of converter was shortened by 2 min as well as cost per ton of steel was reduced by CNY 1~2 Yuan with the system so that the transformation of converter operations from “experience driven” to “data driven” is effectively promoted.

In this article, the increase of ore types blended under the current condition of proportion of iron concentrate in sintering of Baotou Steel is researched as well as optimal ore blending scheme is proposed through comprehensive evaluation of sinter from such aspects as the chemical composition, size composition and metallurgical performances. The research results showed that the quality indexes of sinter in scheme 4 (45% self-produce iron concentrate+31% Mac fines+11%FMG mixed ore fines+5% high-silicon Brazilian rough ore fines+4% Indian ore fines+3% limonite) reached optimal values, solid fuel consumption was decreased by 3.46 kg/t compared with that of benchmark scheme, finished product rate was increased by 3.09 percentage point, drum strength was increased by 2.54 percentage point and average particle size was increased by 0.37 mm so that this scheme was preferred.

In the paper, it is proposed the method of detecting such problems as tearing, surface tears, edge damages and foreign matters of materials for travelling belt adopting 3D vision technology in such industries as mining and metallurgy, elaborated the technical principles and detection algorithms of detecting surface defects for travelling belt based on 3D vision technology as well as described the design and installation way of visual image acquisition device suitable for dusty working environment. The detection system of surface deterioration trend and tearing for travelling belt is suitable for such operation environments of transporting large-scale bulk material as steel metallurgy and ports. It has been in operations in steel enterprises for two years, during which the surface tears of travelling belt are detected timely and accurately so that further expansion of faults is avoided and good effects are achieved.

In this paper, the microstructure, microtexture and macrotexture of DC04 deep drawing automobile steel in different process states are studied, transverse and longitudinal yield strength, tensile property, percentage elongation after fracture, n value and r value as well as which in direction of 45° of the test steel with thickness of 0.6~2.0 mm are with statistical analysis. The results indicated that the fluctuation of transverse and longitudinal tensile property, n value and r value and which in direction of 45° of the test steel with thickness of 0.6~1.0 mm was great as well as proportion of cracked parts was 79.7%; the stability of such properties as transverse and longitudinal tensile property, n value and r value and which in direction of 45° of the test steel with thickness of 1.2~2.0 mm was improved as well as proportion of cracked parts was 20.3%. The microstructure of as-hot-rolled test steel is mainly equiaxed crystal ferrite, surface layer is with deformation textures {001}<110>, {112}<110> and {554}<225>, subsurface layer is with deformation texture {111}<112> as well as the core is mainly with rotating cubic texture {001}<110>; the microstructure of acid-rolled test steel is mainly fibrous ferrite, main textures are α texture {112}<110>, γ texture {111}<110> and λ texture {001}<110>; the microstructure of annealed test steel and finished product is mainly recrystallized ferrite, annealed test steel is composed of stronger γ texture ({111}<112> and {111}<110>) and α texture, finished product is mainly composed of γ texture {111}<112>. The macrotexture of test steel with good formability is γ texture ({111}<110> and {111}<112>) as well as intensity is around 10; the macrotexture of test steel with poorer formability is mainly {100}<011> and {112}<110>, intensities are 9.00 and 8.54 respectively as well as proportion of macrotexture {111}<110> favorable to deep drawing is smaller.

In the paper, the study on effect laws of ore proportioning structure on quality of pellet is carried out aiming at such problems as low strength and high reduction swelling rate of manufactured pellet caused by high contents of such harmful elements as K, Na, F and S in iron ore concentrate of Bayan Obo. The study results showed that the pellet could be promoted to be fully oxidized, compressive strength of pellet could be improved and reduction swelling of pellet could be restrained by adding high silicon hematite and high magnesium magnetite with low contents of sulfur and alkali metal. The compressive strength of pellet could be significantly increased to 2 380 N and reduction swelling rate could be reduced to 13.2% with the scheme of optimizing ore proportioning that 52% iron ore concentrate of Bayan Obo+32% high silicon and low sulfur magnetite concentrate+8% high silicon hematite concentrate+8% high silicon high magnesium magnetite concentrate, which could provide the theoretical support and technical path for preparing high quality pellet with iron ore concentrate of Bayan Obo.

The endurance bending strength of gear for reducer is checked as well as it is deduced that it is seriously lower under the impact load of billet to work roll table so as to cause the problems of frequent gear tooth break and locating key cutting based on structure of reducer for work roll table of CCS rolling mill combining with causes of billet impacting work roll table and its impact load.Under the original working conditions, reasonable structure of reducer for work roll table is obtained by using the locating key with double keyways after quenching and tempering, increasing length and height of output shaft for reducer, changing size of base for reducer as well as increasing such parameters as maximum output torque and input power. After the optimization, endurance bending strength of tooth root and contact fatigue strength of tooth surface for reducer could meet the requirements of on-site working conditions.

The occurrence state and change rules of stock for rare earth in high carbon medium manganese steel as well as effects of rare earth on sulfide inclusions, oxide inclusions, microstructure, hardening efficiency of static compression and impact wear property are systematically studied through metallographic observation, 30% static compression, impact wear test and theoretical analysis. The study results showed that the content of solid solution rare earth for high carbon medium manganese steel could not be increased by adding a large amount of rare earth and it remained below 0.003 5%. The hardening efficiency of 30% static compression at room temperature for high carbon medium manganese steel is improved by adding rare earth, which is increased from 63.25% without rare earth to 78.57% ~88.37% with rare earth. The impact wear resistance of high carbon medium manganese steel is improved. The relative wear resistance is increased by 1.010 0~1.893 0 times with impact load of 2 J and it is increased by 1.391 3~1.822 8 times with impact load of 5 J. The optimal amount of rare earth added into high carbon medium manganese steel is 0.20%~0.25% under the experimental conditions.

In this paper, the surface corrosion resistance of non-passivated galvanized steel strip DX51D+Z is studied with 24 h neutral salt spray test as well as the influences of such factors as amount of greasing on surface, standing time and surface treatment methods on formation of white rust on surface are investigated. The study results showed that the amount of greasing on surface and standing time after greasing were the main factors influencing corrosion resistance of non-passivated galvanized steel strip DX51D+Z. The corrosion resistance of non-passivated galvanized steel strip DX51D+Z could be effectively improved by optimizing such surface treatment processes as combining greasing in production line with manual greasing and controlling standing time after greasing within 96 h, which could meet the acceptance target of area of white rust on surface ≤5% after 24 h neutral salt spray test.

As a kind of revolutionary steel material, Zn-Al-Mg coated steel is gradually becoming the ideal substitute of traditional galvanized steel sheet and Al-Zn alloy coated steel sheet due to its excellent corrosion resistance and edge trimming protection effect as well as good formability and surface appearance. In this paper, it is reviewed the chemical composition system, effects of various elements, current status of research and development at home and abroad as well as patents and researches on application technologies for Zn-Al-Mg coated steel. Moreover, it is mainly sorted out and compared the composition design, microstructure characteristics and performance features of Zn-Al-Mg coated products of different systems in Japan, Europe and China. Finally, the future development trend of Zn-Al-Mg coated steel is expected to provide references for further research and development and applications of this material.