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The aluminum melt degassing of die-cast aluminum alloy is very important to the mechanical properties of the casting. Hydrogen absorption is the main reason for the formation of pinholes in aluminum alloy castings and reduces air tightness and mechanical properties. Therefore, various measures must be taken to strictly control the content of hydrogen and other […]

The difficulty in producing remelting aluminum ingots lies in ripple control. The continuous casting machine adopts chain transmission, which has poor transmission stability and poor impact resistance. During operation, due to vibration and shaking, the molten aluminum in the mold that is not fully solidified will produce ripples. Therefore, the common surface ripple of aluminum […]

Standing slab is a very important process in cast-rolled strip. The quality of the vertical plate and the success of the standing slab are directly related to the quality of the cast-rolled strip. In the standing slab operation, the following issues must be paid attention to: According to the planned thickness of the cast-rolled slab, […]

The slag mixed into the ingot or other non-metallic impurities in the ingot are called non-metallic inclusions, commonly known as slag inclusions. Its fracture features are striped or flake-shaped, and the microstructure features are mostly black linear, massive, and flocculent disordered tissues, with obvious color difference from the matrix. So slag removal is important for […]

The slag mixed into the ingot or other non-metallic inclusions falling into the ingot are called non-metallic inclusions, commonly known as slag inclusions. The macroscopic structure is characterized by no fixed shape, black pits, and no clear boundary with the matrix. The characteristics of non-metallic inclusions can only be clearly revealed after the low-magnification test […]

The pouring system includes a front box, a feed nozzle and an intermediate connecting pipe, which are mostly installed on a bottom plate. There is a fine adjustment mechanism on the bottom plate. When assembling, adjusting this mechanism can make the distance between the feed nozzle and the roll gap reach the expected deviation. The […]

On the surface or inside of the cast-rolled sheet, the defects of metal or metal inclusions that are different from the base metal in the macro or microstructure, and in the ultrasonic inspection will destroy the continuity of the base structure and are an irreparable defect. In severe cases, it will be scrapped. Defects of […]

Single tube blowing method: It is composed of high-pressure N2 (or Ar) gas cylinder, pressure reducing valve, melt-resistant blowing nozzle and desiccant. The single-tube blowing process is to first preheat the blowing nozzle to remove the moisture adsorbed on the surface, and then adjust the pressure relief valve according to the depth of the inserted […]

In order to overcome the shortcomings of the single-pipe blowing method, such as the small area of ​​action and the difficulty of controlling the bubble size, a rotary blow method with a porous blowing head was developed. The structure of the blowing head can be varied, but the purpose is only one, that is, to […]

The quality of the aluminum melt largely determines the quality of the final product. In particular, there are two or more electrolytic aluminum liquids (more hydrogen content, more inclusions) and one less (less active crystal nuclei). If the process is improper, it will cause the cast-rolled coil produced with liquid material ingredients to have more […]