Aluminum alloy casting process
A casting process and aluminum alloy technology, applied in the field of casting, can solve the problems of difficult quality assurance, unqualified leakage rate, shrinkage, shrinkage and pinholes, etc., to improve the qualification rate, ensure the quality of castings, and reduce production costs. Effect
Active Publication Date: 2018-01-05
宁波方格机械有限公司
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Problems solved by technology
Aluminum alloy (shell, box) castings are key parts for UHV power transmission and transformation equipment. Shrinkage cavities, shrinkage porosity, and pinholes are easily produced during the casting process. The product qualification rate is low and the quality is difficult to guarantee.
70% of casting waste is due to shrinkage porosity and pinholes leading to unqualified leakage rate
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[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0022] Such as figure 1 As shown, the aluminum alloy casting process of the embodiment of the present invention includes the following process steps:
[0023] (1) Alloy smelting: adding a modifier at a temperature of 720-740°C can significantly improve the stability; followed by degassing, the degassing temperature is controlled at 730-740°C; the temperature of the alloy after smelting is 730-735°C;
[0024] (2) Place a movable hole conformal chiller 1 in the inne...
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The invention provides an aluminum alloy casting process. The technical key points are that the process steps comprise alloy smelting, mobile conformal cold iron placing, pouring, post treatment, heat treatment, finished polishing, water pressure and air tight test. According to the aluminum alloy casting process, the mobile conformal cold iron is adopted instead of sand core head, and thus the effect of splat cooling and the effect of sand core supporting and positioning are achieved. When a casting piece is solidified, the mobile conformal cold iron is pulled out from the two sides of the casting piece to be utilized repeatedly; the quality of the casting piece is guaranteed; the pass ratio is increased; production cost is lowered; and the effect that product quality meets technical standard requirements is guaranteed.
Description
technical field [0001] The invention relates to the field of casting, in particular to an aluminum alloy casting process. Background technique [0002] Domestic research on low-pressure casting began in the 1950s. Since it was formally applied to industrial production, its development speed is extremely rapid. At present, domestic automobile and tractor manufacturers have formed specialized low-pressure casting workshops, and this process has also been widely used in shipbuilding, electrical machinery, instrumentation, light industry and national defense industries, and has developed from the earliest production of simple parts to the production of complex parts. In the 1960s, foundry workers in my country's shipbuilding industry system applied this process to casting copper alloy castings with a higher melting point to produce marine rudders, copper sleeves, valve bodies and small propellers. In the 1970s, the low-pressure casting process was used to produce large-scale c...
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IPC IPC(8): C22C1/03B22D18/04C22F1/04
CPCB22D18/04C22C1/026C22C1/03C22F1/04
Inventor 司贵成
Owner 宁波方格机械有限公司