Single crystal high-temperature alloy DD28 was prepared in a vacuum directional solidification furnace. The salt-coated thermal corrosion performance of the alloy at 900℃ was studied. The corrosion products were analyzed using scanning electron microscopy, energy dispersive spectrometer and X-ray diffraction instrument. The results show that the DD28 alloy has excellent salt coating thermal corrosion performance. The corrosion rate is relatively low at 20 hours, reaches the maximum at 40 hours, and gradually decreases after 40 hours. The corrosion rate of the alloy is relatively low, and the corrosion kinetics curve basically follows the parabolic pattern.The main corrosion products of alloy salt heating corrosion are Al2O3, NiO, Cr2O3, NiS and Ni2SO4. The corrosion products remain basically intact, with only a very small amount of peeling. The corrosion layer can be divided into the outer corrosion layer and the inner corrosion layer. Their thicknesses are 40μm and 60μm respectively. The outer corrosion layer consists of corrosion products such as Al2O3, NiO, Cr2O3, NiS, Ni2SO4 and chlorides, while the inner corrosion layer is caused by internal oxidation and internal sulfidation of the alloy substrate.

Using equipment such as OM, EBSD, and Rockwell hardness tester, the microstructure, mechanical properties and texture evolution laws of the core and edge of the profiles under extrusion temperatures of 350 ℃ and 400 ℃ were analyzed. Studies have shown that under the same extrusion temperature conditions, there are significant differences in the microstructure of the cross-sections of the profile's core and edge. The cross-sections at the core position have equiaxed grains, while those at the edge position form flat-shaped grains. Moreover, the recrystallization ratio at the edge (7.7% - 7.8%) is twice that of the core (3.3% - 3.6%). Under the same extrusion temperature conditions, due to the smaller grain size at the edges of the profiles, the mechanical properties and hardness of the profile edges are higher than those of the core of the profile. When the extrusion temperature increases from 350 ℃ to 400 ℃, it will cause the grain size of the profile to increase, thereby reducing the overall strength of the profile. Texture analysis shows that the core of the profile mainly has A{011}<111> and Copper{112}<111> textures; the metal flow at the edges of the profile is affected by friction, and Copper{112}<111> and S{123}<634> textures account for a larger proportion.

This paper reviews the research progress of pure nickel N6 in terms of its hot processing map, constitutive equation, influencing factors of mechanical properties (annealing temperature and cold rolling reduction), extrusion forming, selective laser melting, and corrosion resistance, and prospects the future research directions of pure nickel N6.

In this paper, the preparation of chromium-coated zirconium alloy by arc ion plating is mainly introduced. Combined with molecular dynamics simulation and micro-dynamic wear tests, the influence of different loads and displacement amplitudes at room temperature on its micro-dynamic wear performance is studied. The results show that as the indentation depth increases, the number of wear atoms, dislocation density, and plastic deformation degree significantly increase, resulting in an increase in the friction coefficient and friction force; increasing the normal load can reduce the friction coefficient, but the wear mechanism changes to a composite wear involving abrasive particles, oxidation and peeling, and an increase in the displacement amplitude significantly aggravates surface roughening and coating peeling, and intensifies the micro-dynamic wear behavior.

This paper conducted a study on the reduction of oxygen content, the improvement of copper purity, and the prevention of grain coarsening in the continuous casting process of copper materials. Firstly, the oxygen-free and high-purity copper casting was carried out through a suction melting furnace - insulation furnace. The effects of melting temperature, coating agent ratio and Ar flow rate on oxygen content and Cu purity in the casting process were analyzed. Secondly, the influence of the casting exit temperature on the grain size of the copper ingot was compared, and the inhibitory effect of this casting process on the grain coarsening of copper materials was investigated. Finally, copper materials with an oxygen content lower than 5 ppm, a Cu purity greater than 99.996%, and an average grain size less than 80 μm were prepared.

The improved production process technology of "horizontal continuous casting of billets - pre-finishing rolling - homogenization annealing - milling - cold rolling - finishing" was adopted to produce tin bronze strip materials. Through theoretical analysis of the roll diameter and roll shape of the roughing mill, rolling pressure, number of rolling passes, rolling deformation rate, tension of the strip during rolling, homogenization annealing, and double-sided milling of the strip, detailed process regulations for pre-finishing rolling, homogenization annealing, and double-sided milling were formulated. The test samples were analyzed and compared using Vickers hardness, tensile test, metallography, and energy consumption calculation methods. It was concluded that after the tin bronze strip material was subjected to 30% pre-finishing rolling process, the surface grain structure was broken into sheet-like structure, and the Sn element was distributed more uniformly in the intergranular region. During the homogenization annealing process, the number of annealing twinning crystals increased significantly, and the internal structure was more uniform. Compared with the traditional process, the total energy consumption of the improved production process was reduced by 3.57 kgce/t, and the total processing energy consumption was decreased.

This paper addresses the situation where samples of sprayed aluminum profiles peel off after being corroded by rainwater. It briefly describes the causes of rainwater corrosion on the surface of aluminum alloys, the corrosion products, and the distribution of their surface microstructures. Through testing methods such as dry adhesion and boiling water adhesion on the profiles after powder spraying, the effect of the coating layer was verified. It compared and analyzed the cleaning effects of alkaline degreasing, acidic degreasing, and chrome passivation. Production control measures were provided to prevent the outflow of non-conforming products from sprayed aluminum profiles after rainwater corrosion, for reference and learning by peers.

The article mainly analyzes the key factors that affect the stability of the aluminum strip cold rolling process from aspects such as production technology and equipment structure configuration. It also briefly introduces similar problems that occurred at the production site, in order to provide reference experiences for the control of cold rolling process stability.

This paper systematically explores the parameter selection and configuration schemes of spectral temperature measurement technology when applied in industrial furnaces. By analyzing the process characteristics of the copper ingot stepwise heating furnace, it proposes a temperature monitoring and optimization scheme based on spectral temperature measurement, and also provides a direction for the intelligent improvement of the equipment.

The article has designed a set of a multi-modal perception-based health monitoring and diagnosis system for aluminum foil rolling machines. By integrating monitoring data from multiple dimensions such as vibration, temperature, and pressure, a complete intelligent diagnosis model covering data acquisition, feature extraction, and fault identification was constructed. The results show that this system can effectively improve the accuracy of abnormal recognition for the rolling machine equipment, providing technical support for the intelligent operation and maintenance of the aluminum processing production line.

In view of the problems existing in the traditional measurement methods of torque loss of the coiler, such as complex operation, large error and low measurement efficiency of a single device, this article proposes an efficient automated parallel measurement method. This method supports one-click start for synchronous measurement of multiple devices. It can automatically adapt measurement parameters according to the winding machine gear and the size of the reel (large/small reel), achieving full unmanned intervention throughout the process. The measurement data is stored in real time in the database (DB), and after linearization processing, it is directly transmitted to the tension control module to form a closed-loop data chain, ensuring that the measurement results are immediately applied to control. This method significantly enhances the measurement efficiency and accuracy, and the entire process of data recording and calculation is fully automated. In addition, this measurement scheme can be extended to measurement of torque loss in uncoiling machines and other rotating equipment, and is suitable for dynamic torque variation scenarios under uniform speed and acceleration and deceleration conditions.

This paper introduces the wastewater treatment process of the Carrousel 2000 oxidation ditch in the non-ferrous metal processing park, and elaborately describes the parameters of each component of this process, in order to better promote and apply this process and the renovation experience.