This paper discusses the problems existing in the process of intelligent construction of copper strip production and puts forward some suggestions.

By analyzing the proton exchange membrane fuel cell products and market, the paper summarizes the key aluminizable products such as hydrogen storage bottle and bipolar plate, and analyzes the technical feasibility of aluminized products. Thus, market-oriented, increase product development and application, and further drive the rapid development of renewable energy.

In this paper, the effect of residual temperature rolling reduction on the interface structure and properties of 1070A/2024 composite sheet is studied by means of metallographic microscopy (OM), scanning electron microscopy (SEM), energy spectrum analysis (EDS), tensile, shear and hardness testing. It is found that the average grain size decreases and the bonding strength of the composite interface increases with the increases of rolling reduction rate. At low residual temperature rolling reduction rate (10%), the improvement of grain structure is not significant, the diffusion of elements in the composite interface region is not high, and the mechanical properties of the composite sheet such as tensile and shear are little improved. At higher pressure rate (25%), the diffusion degree of elements in the composite interface area of the sheet metal increases, but the fine defects in the matrix of the sheet metal increase, which is unfavorable to the tensile properties of the sheet metal, and can not significantly improve the hardness of the composite sheet. At 15% compression rate, the alloy elements at the composite interface have good diffusion, good interface bonding strength, and the best tensile property. Under this parameter, the tensile strength, yield strength, and elongation are 189.7MPa, 222.5MPa, 20.4%, respectively, and the width of the regional element diffusion layer is 7μm.

In this paper, unidirectional thermal compression experiments on as-cast ZK60 magnesium alloy are carried out with Gleeble-1500 thermal simulator at deformation temperature of 250-400℃ and strain rate of 0.001~1s-1. Based on the dynamic material model and Murty instability criterion, the hot working diagram of as-cast ZK60 magnesium alloy is established, and the appropriate hot working process window is determined based on the microstructure analysis. The results show that the instability zones are mainly distributed at 250~320 ℃, 0.1~1s-1, and 350~400 ℃, 0.003~0.056s-1. The causes of instability are local rheology and solute drag effect, respectively. The optimum hot-working parameters of as-cast ZK60 magnesium alloy are 350~400 ℃, 0.3~1s-1 and 330~400 ℃, 0.001~0.003s-1.

In this paper, the single-layer and double-pass friction stir additive manufacturing of 3mm 6005A-T6 aluminum alloy is studied to explore the effect of additive spacing and additive direction of additive tools on the interface migration and the internal quality of additive molding. The results show that when the additive distance is 15mm, the original interface of the substrate metal exists between the two additive zones. With the decrease of the additive distance, the original interface of the substrate metal begins to plasticize and gradually disappear to become an effective additive zone. With the further decrease of the additive distance, the cold lap through defect appears inside the double additive zone. Reverse additive is helpful to eliminate the interface migration problem and cold lap defect caused by the same direction additive, and the effective additive area width is the largest when the forward side is on the outside of the reverse additive mode.

n order to study the influence of beam swing trajectory on laser welding quality of aluminum alloy, this paper takes 2mm thick 5052 aluminum alloy as the object, adopts the control variable method, obtains the weld penetration depth, fusion width and bonding strength under three kinds of beam swing trajectory, and makes a comparative analysis. The results show that the energy input of the circular beam swing mode is distributed more evenly , the outer surface of the weld is beautiful and smooth, the whole is arranged in a circular arc with the shape of fish scale, and the weld has a better width to depth ratio. When the input energy distribution of the beam is more uniform, the evaporation fluctuation of metal elements in the molten pool can be effectively improved, which helps to improve the bonding strength of the weld.

In this paper, the effects of solution aging heat treatment on the microstructure and tensile properties of Ti6246 titanium alloy are studied by means of optical microscope, room temperature tensile property test and scanning electron microscope. The results show that when the aging temperature is determined, the content and volume of the primary α phase in the tissue will decrease gradually with the increase of the solution temperature, and the primary α phase will disappear completely when the solution temperature reaches the single-phase region. The strength of the alloy increases with the increase of solution temperature, while the plasticity decreases with the increase of solution temperature. When the solution temperature is low, the dimple is the main morphology of the tensile fracture. When the solution temperature approaches the phase transition point and reaches the temperature of the single-phase region, the fracture morphology is not dominated by dimple, but by rock-like morphology, accompanied only by a small number of small dimples, and the tear prisms are gradually obvious.

In this paper, the influence of the length and offset distance of stir needle on the cold lap defects and mechanical properties of 6005A-T6 aluminum alloy welded seam in friction stir welding is studied. The results show that there are cold lap defects on the back side of the weld, which extend to the weld core. With the increase of the length of the mixing needle, the cold lap defects are relatively straight at the beginning, and then began to extend upward. At the same time, with the increase of the length of the stirring needle, the heat loss of the joint strength increases, and the tensile strength decreases. The research on the offset distance of the mixing head shows that the mixing head can only be offset by a certain distance on the forward side. If the distance is too large, the upward extension distance of the cold lap defect will increase, and the mechanical properties of the joint will be reduced.

In this paper, the pulsating current vacuum brazing process of GH4169 thin-wall structure is proposed, and the brazing experiment platform is set up. The finite element analysis software is used to simulate the surface temperature field of thin plate during current loading, and it is verified by experiments. By means of theoretical deduction and data fitting, the rule of temperature rise in the welding area and the calculation formula of brazing temperature in the state of heat balance are proved. The brazing temperature and initial heating rate can be calculated by giving the parameters of the power supply. The results show that the process can ensure the uniformity and controllability of the temperature in the welding area, and can realize the brazing of thin-walled structures.

In this paper, starting from the structure of the mould, the integral mould is used to replace the original independent mould, which greatly improves the heat resistance and deformation resistance of the mould. At the same time, the water channel of the crystallizer is improved to avoid the problems of uneven microstructure and poor wall thickness uniformity caused by the uneven water flow caused by the “short circuit” of cooling water. The average life of graphite mold is increased from 55.9h to 117.6h, the wall thickness deviation of billet is reduced from 1.05mm to 0.27mm, and the equiaxial crystal rate of billet is increased from 30% to 80%.

In this paper, the key factors affecting the engineering production of wide ZK61M magnesium alloy plate are studied. In view of the poor plasticity of ZK61M magnesium alloy and the easy cracking characteristics of wide plate processing, the near-isothermal multi-direction forging at uniform annealing temperature is used to improve its processing plasticity, by adding secondary heating during the process of wide plate rolling the uniformity of structure and properties are ensured. Mechanical properties are improved by temperature-controlled rolling and artificial aging. Research shows that temperature should be heated to 400~ 420 ℃ and held for a long time during the process of forging, rapid cooling after two times of upsetting and multi direction forging could significantly improve the plasticity of the billet. The rolling temperature should be in range of 370～400 ℃ at the beginning, the structure and performance uniformity can be obtained by the addition of secondary heating procedure when total rolling rate reaches 70%. Keep final rolling temperature in range of 300～330 ℃, artificial-aging at 170 ℃ for 12 h.

Based on the observation of the fracture morphology of C51100 tin phosphorus in the process of rough rolling and the composition of the fracture position, the cause and mechanism of the fracture defect are analyzed and studied. The results show that by controlling impurity elements, horizontal continuous casting process, milling and rough rolling, and adopting electromagnetic assisted casting technology in horizontal continuous casting, the phenomenon of crystal breaking can be reduced, and the yield of the product can be greatly improved.

This paper analyzes and discusses the hardness related quality problems in the production of radiator profiles.Through the standard control of composition, process and production operation, the hardness compliance and uniformity of profiles meet the requirements of customers.

This paper analyzes the main problems existing in the use of aluminum belt stitching machine, develops and designs an improved aluminum belt stitching machine, introduces its control points, improvement measures, working process, and designs the main components.

By using PI Vision to build an online monitoring system of heating furnace fan, real-time collection of fan bearing vibration and temperature data information, automatic storage of equipment status data, trend analysis, to achieve predictive health management of aluminum ingot heating furnace fan.