Method for casting outstanding shell of brake booster vacuum pump
A technology for boosting vacuum pump and casing, applied in the field of high-quality brake booster vacuum pump casing, can solve the problems of low production efficiency, high production cost, poor wear resistance, etc., to improve alloy yield, improve alloy quality, and reduce production. cost effect
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Embodiment 1
[0033] A casting method of a high-quality brake booster vacuum pump casing, the specific steps are as follows:
[0034] (1) Select shell raw materials and prepare for smelting:
[0035] Select aluminum-silicon alloy as the raw material of the shell, remove the oxide layer on the surface of the aluminum-silicon alloy, and prepare for smelting; clean the coating and oxide layer on the surface of the melting equipment, rapidly raise the temperature of the melting equipment to 300°C, keep it warm for 0.5 hours, and then heat it at 20°C / min The temperature is raised to 450°C at a high speed, and at the same time, the protective coating is evenly sprayed on the surface of the smelting equipment in the same direction, and kept warm for 0.5 hours, and dried for later use; the composition of the silicon-aluminum alloy and the mass percentage of each composition are: Si: 23%, Mg: 4.5%, Cu: 0.5%, Fe: 0.15%, Mn: 1%, Zn: 0.1%, Ti: 0.05%, Cr: 0.25%, and the rest is Al;
[0036] (2) Raw mat...
Embodiment 2
[0048] A casting method of a high-quality brake booster vacuum pump casing, the specific steps are as follows:
[0049] (1) Select shell raw materials and prepare for smelting:
[0050] Select aluminum-silicon alloy as the raw material of the shell, remove the oxide layer on the surface of the aluminum-silicon alloy, and prepare for smelting; clean the coating and oxide layer on the surface of the melting equipment, rapidly raise the temperature of the melting equipment to 320°C, keep it warm for 0.5 hours, and then heat it at 22°C / min The temperature is raised to 500°C at a high speed, and at the same time, the protective coating is evenly sprayed on the surface of the smelting equipment in the same direction, and kept for 0.8 hours, and dried for later use; the composition of the silicon-aluminum alloy and the mass percentage of each composition are: Si: 24%, Mg: 3.2%, Cu: 2.5%, Fe: 0.25%, Mn: 0.6%, Zn: 0.15%, Ti: 0.1%, Cr: 0.2%, and the rest is Al;
[0051] (2) Raw materia...
Embodiment 3
[0063] A casting method of a high-quality brake booster vacuum pump casing, the specific steps are as follows:
[0064] (1) Select shell raw materials and prepare for smelting:
[0065] Select aluminum-silicon alloy as the raw material of the shell, remove the oxide layer on the surface of the aluminum-silicon alloy, and prepare for smelting; clean the coating and oxide layer on the surface of the smelting equipment, quickly raise the temperature of the smelting equipment to 300-350°C, keep it warm for 0.5 hours, and then Raise the temperature to 450-550°C at a rate of 25°C / min, and at the same time spray protective coating evenly on the surface of the smelting equipment in the same direction, keep it warm for 0.5-1 hour, and dry it for later use; the composition of silicon-aluminum alloy and the mass percentage of each composition For: Si: 23-25%, Mg: 2.5-4.5%, Cu: 0.5-4.5%, Fe: 0.15-0.5%, Mn: 0.2-1%, Zn: 0.1-0.25%, Ti: 0.05-0.15% , Cr: 0.05-0.25%, the rest is Al;
[0066] ...
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