This paper focused on the problem of grain control in the preparation process of high-performance and high-purity copper sputtering targets, and conducted a comparative study on the effects of different hot rolling process on the microstructure and properties. Based on the systematic analysis of the entire continuous hot rolling and segmented temperature-controlled rolling two process routes, the regulatory mechanism of thermodynamic path planning on the microstructure evolution was revealed. Compared with the continuous hot rolling process, the segmented process of hot rolling and warm rolling was adopted, which achieved the synergistic effect of fine grains and dislocation strengthening, and obtained a uniform fine-grained microstructure of 62.24μm and an excellent hardness of 89HV. This provided important process optimization directions and theoretical basis for industrial target materials.

In this paper, by using the industrial frequency core-type induction furnace for melting, the research and application practice of controlling the process, melt purification and deoxidation techniques during the melting process are carried out. As a result, the engineering production of high-purity oxygen-free copper ingots without vacuum conditions is achieved. Ingots with a copper content of ≥99.99wt% and an oxygen content of ≤3ppm , with qualified quality, are produced.

By analyzing the current situation of the deep well casting industry for aluminum processing, this paper deeply explores the key risk points in its safety production, and proposes corresponding control paths from two aspects: process equipment improvement and personnel operation management enhancement. The aim is to provide reference and inspiration for the safe and sustainable development of the industry.

This research focused on four core aspects: the design of copper-nickel-tin alloy composition, the optimization of horizontal continuous casting process parameters, the regulation of subsequent heat treatment, and the characterization of microstructure and properties. Through experimental methods such as vacuum induction melting, metallographic analysis, and mechanical property testing, the optimal combination of process parameters is selected. The results show that the copper-nickel-tin strip material prepared after optimization has an ultimate tensile strength of 650 MPa and a conductivity of 35% IACS, full meeting the application standards for high-end lead frames. The research has refined an innovative technical path of “component-process-structure-performance” coordinated regulation, providing theoretical and experimental support for the domestic production and industrialization of this type of material.

This paper discusses the production process configuration of the aluminum alloy continuous heat treatment production line, and elaborated describes the process configuration principles and characteristics of the continuous heat treatment production line under different application scenarios. It has guiding significance for the selection of process configuration for the continuous heat treatment production line in project construction.

In response to the problem of performance degradation and cost increase in 2xxx aluminum alloy oil drilling rods during downhole operations, this study employed the orthogonal experimental method to investigate the key process parameters of hard anodization. The effects of gradient voltage（12V→19V/22V/25V/28V）, temperature (-3~6 ℃), and time (60~120 min) on the performance of the film layer after surface treatment are explored. In response to the problems such as oxidation and burn damage that occurred during the conventional processing of 2xxx aluminum alloy oil drilling rods, an innovative control strategy of "maximum voltage duration percentage of 15%" was proposed. This resulted in the optimal parameter combination of a voltage of 19V, a temperature of (6±1)℃, and a duration of (80±5) minutes.This scheme significantly enhances the performance of the film layer, reducing the wear loss of the surface by over 40%. The hardness can reach up to 420HV, significantly improving the surface morphology. It provides an effective solution for reducing the wear of the drill pipe and lowering the operation and maintenance costs.

This paper takes the 1650mm aluminum strip hot rolling electric drive screw-down device of a certain domestic factory as the research object. In response to the problems such as insufficient screw-down speed and long inter-pass time in the original system, a comprehensive renovation plan involving mechanical, hydraulic and electrical systems is proposed. By enhancing the motor power, optimizing the lubrication method, and adopting servo valve control for the balance system, the average pressing speed was increased from 6mm/s to 12mm/s, and the inter-pass time was shortened to 3.5 seconds. This significantly improved the rolling efficiency. It provides a theoretical basis and engineering reference for the upgrade of similar equipment.

This paper analyzes the causes and hazards of hydraulic system shock, and proposes measures for suppressing the shock and optimizing the buffering. Combined with design examples, the design scheme of the high-pressure hydraulic system for the aluminum strip hot rolling machine has been improved and optimized, effectively solving the problem of hydraulic system shock. The stability and reliability of the system have been significantly enhanced, and the service life of the equipment has been prolonged.

This paper discusses the mechanism of the deviation in the gap of the high-precision plate and strip, copper strip rough rolling mill, and analyzes the key factors influencing the gap deviation based on actual typical cases. This has certain guiding significance for the investigation and resolution of the gap deviation problem.

This paper mainly introduces the characteristics, applications, and existing issues of the automatic stacking device for existing aluminum plate and strip hot rolling mills. It focuses on elaborating the key features of the new automatic plate stacking machine, the process flow, and the structural characteristics of each major equipment. Additionally, basen on the on-site usage situation, it proposes the subsequent improvement directions.

In response to the problems of axial displacement of the rolls and surface scratches that may occur when disassembling the bearing seat in the existing fully automatic multi-station roll disassembly and assembly device, this paper proposes an optimized design scheme that changes the supporting structure from supporting the roll surface to supporting the shaft neck. This scheme directly supports the shaft neck area, avoiding the possible surface damage caused by supporting the roll surface. At the same time, the shaft neck structure is utilized to achieve axial positioning, effectively preventing the axial displacement of the rolls during the disassembly process due to the overly tight bearing seat. This supporting frame is also movable and adjustable, facilitating the support of multiple types of rolls. The optimized structure ensures the disassembly accuracy while further enhancing the safety and reliability of the equipment.

In order to further reduce the gas consumption of the aluminum ingot heating furnace, this paper studies two traditional combustion systems with fixed air-fuel ratio and flow ratio. It compares the differences between the two air-fuel ratio control methods and analyzes the reasons for the imprecision of the air-fuel ratio. In response to the drawbacks of the traditional combustion system, the TPS technology that can solve the problem of inaccurate air-fuel ratio caused by the increase in the temperature of the auxiliary combustion air was found. The TPS system was introduced into the original combustion system of the aluminum ingot heating furnace for technical transformation. After the transformation, a significant energy-saving effect of 8% in gas consumption was achieved, and the stability of the combustion system was also improved.

This paper presents the development path and system construction of intelligent operation and maintenance of nonferrous metal equipment under the policy-driven framework. Based on national plans and international standards, it outlines the four evolutionary stages of intelligent operation maintenance from prevention maintenance to AI-driven operation and maintenance. It proposes a technical architecture consisting of four layers: perception, edge, platform, and application. Combined with industry practices, it analyzes its comprehensive value in terms of cost reduction and efficiency improvement, safety enhancement, and management optimization, and looks forward to the future direction of deep integration of generative AI.

This paper focuses on the construction methods of the digital twin system for aluminum rolling mills and proposes a four-layer system architecture that includes physical perception, digital models, data fusion, and intelligent applications. Based on this architecture, it particularly analyzes the crucial role of mechanical three-dimensional modeling within it, and, in combination with the structural characteristics of aluminum rolling mills, elaborates on the modular and parametric mechanical modeling methods for digital twin. This architecture can provide systematic design and technical references for the simulation analysis of the rolling process, optimization of process parameters, and assessment of extreme conditions, and is conducive to promoting the digital and intelligent transformation and lean operation of aluminum rolling lines.

This paper proposes an innovative idea of using aluminum slag instead of traditional bauxite to produce ceramic sand, aiming to achieve the harmless treatment and resource utilization of hazardous waste, while reducing the raw material cost and resource dependence of ceramic sand. It also has significant environmental benefits and economic value. The article systematically reviews the physicochemical properties and environmental hazards of aluminum slag, the traditional production processes and performance requirements of ceramic sand, the core technical routes for preparing aluminum slag-based ceramic sand, the technical and economic aspects, and the overall environmental impact throughout the process. It also deeply analyzes the current technical bottlenecks and future development directions, with the aim of providing theoretical references and technical paths for the high-value utilization of solid waste in the aluminum industry and the green and sustainable development of the foundry industry.

This paper mainly introduces the experimental research on the application of the process for recovering cadmium resources from soot ash through acid leaching and displacement, as well as the process control during the production application. Lead and cadmium are enriched and recovered. The test results showed that the leaching rate of cadmium is over 70%. By replacing the leaching solution with zinc powder, sponge cadmium containing over 80% cadmium is produced. At the same time, based on the test situation, the key points and solutions to be noted when applying this process to actual production are analyzed.