Common material of die casting mould
The alloy used in die casting is mainly non-ferrous alloy, as for ferrous metal (steel, iron, etc.) due to the problem of mold materials, less use.Aluminum alloy is widely used in nonferrous alloy die casting, followed by zinc alloy.The following is a brief introduction to the casting of non-ferrous metals.
(1) classification of non-ferrous alloy casting blocked shrinkage mixed shrinkage free shrinkage
Lead alloy 0.2-0.3% 0.3-0.4% 0.4-0.5%
Low melting point alloy of tin and zinc 0.3-0.4% 0.4-0.6% 0.6-0.8%
Al-si series 0.3-0.5% 0.5-0.7% 0.7-0.9%
Die-casting non-ferrous alloy aluminum alloy aluminum copper aluminum magnesium series 0.5-0.7% 0.7-0.9% 0.9-1.1%
High melting point aluminum zinc magnesium alloy 0.5-0.7% 0.7-0.9% 0.9-1.1%
(2) recommended casting temperature for all kinds of die casting alloys: average wall thickness of castings 3mm; average wall thickness of castings >3mm; simple structure; complex structure; simple structure; complex structure
Aluminum alloy aluminum silicon is 610-650 ℃, 640-680 ℃, 600-620 ℃, 610-650 ℃
Aluminum bronze is 630-660 ℃, 660-700 ℃, 600-640 ℃, 630-660 ℃
Aluminum and magnesium is 640-680 ℃, 660-700 ℃, 640-670 ℃, 650-690 ℃
Aluminum zinc series 590-620 ℃, 620-660 ℃, 580-620 ℃, 600-650 ℃
Zinc alloy 420-440 ℃, 430-450 ℃, 400-420 ℃, 420-440 ℃
Magnesium alloy 640-680 ℃, 660-700 ℃, 640-670 ℃, 650-690 ℃
Copper alloy ordinary brass 940-910-930 ℃ 980 ℃, 900-930 ℃, 900-950 ℃
Silicon brass 900-920 ℃, 930-970 ℃, 910-940 ℃, 910-940 ℃
- note:
(1)the casting temperature is generally measured by the temperature of the molten metal in the holding furnace.
(2) zinc alloy casting temperature should not exceed 450 ℃, lest the coarse grains.
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