Check valve body aluminum alloy casting method
A kind of check valve, aluminum alloy technology, applied in the contact parts between valve element and valve seat, valve details, control valve and other directions, can solve the problems of low quality qualification rate and low output, and achieve reasonable raw material formula and use Long life and quality improvement effect
Inactive Publication Date: 2015-06-03
ANHUI CHUNHUI INSTR CABLE GROUP
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- Description
- Claims
- Application Information
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Problems solved by technology
This method has problems such as low output and low quality pass rate.
Method used
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Experimental program
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Embodiment Construction
[0021] A method for casting an aluminum alloy for a check valve body, comprising the following steps:
[0022] a. Cast aluminum alloy blanks: the weight percentage of each alloy composition: silicon 2.5-3.1%, magnesium: 0.2-0.6%, iron 0.05-0.13%, manganese 0.15-0.24%, titanium 0.03-0.08%, strontium 0.01-0.03% , 0.05-0.15% chromium, and the balance is aluminum; the temperature of the cast aluminum alloy blank is reduced to 250°C, then heated to 650-760°C, kept for 3-5 hours, cooled to 280-420°C, kept for 4 hours , then heated to 650-760°C, kept for 35 hours, cooled to 400°C at 50°C / hour, and then cooled to 140°C at 20°C / hour;
[0023] b. Machining: Put the aluminum alloy blank into the punching machine for edge trimming and deburring;
[0024] c. Quenching treatment: send the valve body parts into the heat treatment furnace to heat to 550-570 ° C, and keep it warm for 3.5 hours; then cool it with quenching liquid;
[0025] d. Tempering treatment: Send the quenched valve body ...
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Abstract
The invention discloses a check valve body aluminum alloy casting method which includes the following steps: a, an aluminum alloy blank piece is poured: alloy components comprise, by weight, silicon 2.5-3.1%, magnesium 0.2-0.6%, iron 0.05-0.13%, manganese 0.15-0.24%, titanium 0.03-0.08%, strontium 0.01-0.03%, chromium 0.05-0.15%, and the balance aluminum, the temperature of an aluminum alloy blank body in pouring molding is reduced to 250 DEG C, then the aluminum alloy blank body is heated to 650-760 DEG C, thermal insulation is achieved for 3-5 hours, a furnace is cooled to 280-420 DEG C, the thermal insulation is achieved for 4 fours, then the aluminum alloy blank body is heated to 650-760 DEG C, the thermal insulation is achieved for 35 hours, the aluminum alloy blank body is cooled to 400 DEG C at the speed of 50 DEG C per hour, and then the aluminum alloy blank body is cooled to 140 DEG C at the speed of 20 DEG C per hour; and b, machining: the aluminum alloy blank piece is placed into a punch press, edges are scrapped, and debur is conducted. The check valve body aluminum alloy casting method can reduce powdered part forming pressure, reduces mold loss, improves forming density, achieves full alloying of materials in the process of sintering, and improves abrasion-resistance of the materials.
Description
technical field [0001] The invention relates to a method for preparing a valve stem of a check valve, in particular to an aluminum alloy casting method for a valve body of a check valve. Background technique [0002] The check valve has two body cover connection design forms: the first is the body cover bolt connection forged steel check valve, the valve designed according to this connection form, the valve body and the valve cover are connected by bolts, and the wound gasket is sealed. The advantage is that it is easy to maintain; the second type of forged steel check valve with fully welded body cover is designed according to this connection form. The valve body and the valve cover are connected by screws and fully welded. At present, in the manufacture of the check valve industry, the domestic check valve body is made of ordinary high-speed steel, or the valve body is machined from stainless steel. Compared with the powder metallurgy valve body, the processing speed of t...
Claims
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IPC IPC(8): F16K25/00F16K15/00C22C21/02B22D21/04C22F1/043C23F17/00
Inventor 沈必亮
Owner ANHUI CHUNHUI INSTR CABLE GROUP