Method for machining die casting metal part
A technology for casting metals and workpieces, which is applied in the field of processing die-casting metal parts, can solve problems such as difficult to eliminate peeling, achieve the effect of reducing the occurrence rate of peeling and improving the yield
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[0023] Among them, according to a particularly preferred embodiment of the present invention, the material of the die-casting metal part is a zirconium-based amorphous alloy, the shot used in the shot peening treatment is a zirconium bead, and the Mohs hardness of the zirconium bead is ≥5.5 , the particle size of the zirconium beads can make the zirconium beads pass through a 100-200 mesh screen.
[0024] Wherein, the composition of the zirconium-based amorphous alloy can be various compositions of zirconium-based amorphous alloys, for example, containing 50-70% by weight of Zr, 10-40% by weight of Cu and 1-10% by weight of Ni.
[0025] Wherein, the polishing treatment may include at least one of manual polishing, mechanical polishing and chemical polishing.
[0026] Wherein, the polishing treatment can remove the concave-convex area of the surface due to shot peening to a depth below the concave surface.
[0027] Wherein, the conditions of the sandblasting treatment have n...
Embodiment 1
[0033] The copper-based alloy (composed of Cu 75 mn 21 AL 4 ) die-casting metal parts obtained by die-casting are placed in a shot-peening machine for shot-peening treatment to obtain the workpiece after the shot-peening treatment, wherein the pressure of the shot-peening is 0.5MPa, and the time is 5 minutes, and the shot used for the shot-peening treatment is Zirconium beads with a Mohs hardness of 5.5 and a size capable of passing through a 300-mesh sieve.
[0034] Polishing the shot-peened workpiece to obtain a polished workpiece, wherein, the polishing process removes the concave-convex area on the surface caused by the shot-peening to a depth below the concave surface.
[0035] The polished workpiece is placed in a sandblasting machine for sand blasting to obtain a sand blasted workpiece, wherein the sandblasting pressure is 0.5 MPa, and the time is 3 minutes, and the used sand grains of the sandblasting process are glass beads. Its hardness is 5, and its size is able ...
Embodiment 2
[0051] The zirconium-based amorphous alloy (composed of Zr 55 al l0 Ni 5 Cu 30 ) die-casting metal parts obtained by die-casting are placed in a shot-peening machine for shot-peening treatment to obtain the workpiece after the shot-peening treatment, wherein the pressure of the shot-peening is 0.5MPa, and the time is 5 minutes, and the shot used for the shot-peening treatment is Zirconium beads, Mohs hardness 6, sized to pass through a 150-mesh sieve.
[0052] Polishing the shot-peened workpiece to obtain a polished workpiece, wherein, the polishing process removes the concave-convex area on the surface caused by the shot-peening to a depth below the concave surface. .
[0053] The polished workpiece is placed in a sandblasting machine for sand blasting to obtain a sand blasted workpiece, wherein the blasting pressure is 0.5 MPa and the time is 3 minutes, and the sand used for the blasting process is ceramic sand. Its hardness is 5.5, and its size is able to pass through ...
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