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April 20, 2026
KYLT die casting factory daily work: Aluminum die-cast gearbox after shot blasting treatment and ready for painting
Shot blasting is a common and critical pretreatment process in the surface treatment of aluminum alloy die castings, mainly used to clean the surface, improve adhesion, and enhance the bonding performance of subsequent coatings or electroplating.
Effectively remove oxide scale, oil stains, residual release agents, and small burrs on the surface of die-casting parts, providing a clean substrate for subsequent treatments such as spraying, anodizing, and electroplating.
By using high-speed steel balls or glass beads to impact, a uniform micro rough structure (anchor pattern) is formed on the surface of aluminum parts, significantly improving the bonding strength of coatings or electrophoresis.
Can achieve matte or matte effect, meeting decorative needs; At the same time, it helps to seal surface micropores, reduce stress concentration, and improve the fatigue and corrosion resistance of parts.
In some processes, shot peening can also play a role in stress relief and surface strengthening, especially suitable for structurally complex automotive and aerospace die-casting parts.
Abrasive selection: Aluminum alloys should use non-ferrous abrasives with moderate hardness, such as glass beads, ceramic sand, or brown corundum, to avoid introducing iron pollution.
Particle size range: commonly used 80 # -320 #, the larger the value, the finer the sand particles, and the smoother the surface.
Spray pressure: controlled at 0.2-0.4 MPa, excessive pressure may cause deformation of the workpiece.
Spray angle and distance: It is recommended to form a 45 ° -75 ° angle between the nozzle and the workpiece, with a distance of 100-300 mm, to ensure uniform processing.
More information about aluminum and zinc alloy die casting, or to get a free quote, please contact: cnkylt@aliyun.com
