R260Mn steel is a kind of heavy rail steel grade which can be used in the production of high speed railway in European Railway Standard, the main technical indexes include:Rm≥880MPa, elongation≥10%, HB hardness range of tread center 260~300, Oxide cleanliness K3≤10. Through the laboratory research, smelting composition range, production technology process and operation points of each operation for R260Mn rail make technical indexes of R260Mn rail for industrial production to meet the contract requirements.

According to the general technical requirements of EU standard for low-alloy high-tensile structural steel S355J0, by using the advanced equipment in Rare Earth Steel Plate Plant of Baotou Steel, through designing reasonable chemical components and developing appropriate production technology, and each quality index of the trial products meet customer requirements. Successfully enter international market through user trial and get the praises from users.

In the paper, it is expounded the influence of the control points for steelmaking raw and auxiliary materials, converter smelting, ladle refining and continuous casting process on the cleanliness of SWRH82B steel, which based on the steelmaking production practice of SWRH82B using billet process of Baotou Steel. Through practice shows that this technology can improve the steel cleanliness of SWRH82B high-carbon hard wire steel and meet the drawing requirements of users.

In the paper, it is introduced production status for hot rolled coil of 22 mm X80 pipeline steel which are trial produced in 2 250 mm hot rolling production line of Baotou Steel. High strength and toughness X80 pipeline steel hot rolled coil with acicular ferrite are produced by using the design of alloying composition of low carbon, high w [Mn+Nb], w [Mo+ Cr+Cu], applying smelting technology of clean steel in Baotou Steel, heating technology of differentiation, constant speed rolling technology and cooling control technology of efficient encryption laminar flow. The strength and toughness index of the coil meets the requirements.

The high strength steel Q550D used in engineering machinery was developed by composition optimization and rolling process optimization in Baotou Steel. The welding performance of Q550D high strength steel was analyzed by the maximum hardness in heat affected zone, the implant test and the Y-slit type cracking test, and the results show that: The highest hardness (HV10) for heat affected zone of Q550D steel plate is 297. The result of implant test shows that under the condition of moderate restraint, Q550D steel plate with 20 mm thickness was welded by HS-70 welding stick, there is no crack without preheating. At the same time, the Y-slit type cracking test shows that under the condition of no preheating to weld Q550D steel plate with 20 mm thickness, the surface crack rate and the cross section crack rate of the two groups of samples are zero.

In order to meet the demand of automobile industry and home appliance industry for ultra low carbon steel deep drawing performance, expand the varieties and improve the quality of steel products, make technical reserves for development and trail production of ultra deep drawing steel in cold rolling production line, Inner Mongolia Rare Earth Steel Plate Co. of Baotou Steel is developing and trail producing hot rolling material of ultra deep drawing steel DC04. By adding alloying element Ti, the interstitial atom content can be controlled to make the steel pure. Using high temperature finish rolling and coiling process to control the precipitation and solid solution of carbides, the deep drawing raw materials with low yield strength and low yield ratio can be obtained to meet the requirements of the downstream process.

In this paper, it introduces the principle of hydrogen decrepitation reaction, the production process, the advantages over traditional process for NdFeB alloy strip, and the factors that can influence it. The effects of hydrogen decrepitation process and traditional process on the properties and structure of the magnets are compared. It expounds and analyzes the importance of the technology of hydrogen decrepitation and jet milling in the current production process of NdFeB magnets.

In order to quantitatively describe the physical elbow erosion of high pressure reinjection pipeline caused by changes of fluid velocity and direction, taking the high pressure reinjection pipeline of NGPD (northwest of Sichuan gas production district) as an example, Fluent software is used to establish a vertical elbow erosion model, the residual strength of corresponding elbow is evaluated and studied by using API579 criterion. The result shows that the maximum erosion rate occurs on the outer wall of elbow pipe. Meanwhile, according to numerical simulation calculation, the control parameters are optimized by the genetic algorithm. In view of the fact that the scale of the pipeline inner wall cannot be measured accurately, a set of relatively complete evaluation and optimization analysis system is established.

Cooling system is a very important part of the electric drive wheel mining truck, this paper aims to introduce a new cooling system for electric drive wheel mining truck, including its structure, principle, cooling airflow, and the design of main generator. It summarizes the advantages of the new cooling system, and provides a new design method for the cooling system of the electric drive wheel mining truck.

Blast furnace pulverized coal injection is an important technology in modern ironmaking process. Improving the level of coal injection is an important technical measure to reduce the coke ratio and production cost of iron and steel enterprises. In this paper, it summarizes the development trend of blast furnace coal injection technology, analyzes the process of automatic control for blast furnace pulverized coal injection, and describes the combination of Schneider Quantum and Xining Special Steel blast furnace new coal injection technology.