A kind of manufacturing method of aluminum-copper alloy pipe fittings
A technology of aluminum-copper alloy and manufacturing method, which is applied in the direction of metal extrusion control equipment, manufacturing tools, metal extrusion, etc., can solve the problems of small and uniform grains, and the inability to obtain internal structures, etc., to achieve fine grains, high Production quality index, excellent comprehensive mechanical effect
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Embodiment 1
[0042] This embodiment provides a method for manufacturing an aluminum-copper alloy pipe fitting, comprising the following steps:
[0043] S1: Heating and heat preservation treatment: put the aluminum-copper alloy ingot into a resistance heat treatment furnace, first raise the temperature to 500°C, and then keep it warm for 5 hours; the aluminum-copper weight component ratio of the aluminum-copper alloy ingot is about 99.2-99.5 / 0.8~0.5% WT, the size is 178mm in diameter*600mm in length.
[0044] S2: Extrusion treatment: Extrude the aluminum-copper alloy ingot obtained by heating and heat preservation treatment with a 1800-ton split die extrusion machine to obtain an aluminum-copper alloy tube blank; the vacuum degree is 50Pa, the working zone of the mold is 10mm, The pressing temperature is 300° C., the extrusion speed is 7 m / s, and the extrusion ratio is 5.
[0045] S3: solution treatment: keep the aluminum-copper alloy tube blank at 480°C for 1.1h;
[0046] Cooling treatm...
Embodiment 2～ Embodiment 4
[0050] The manufacturing steps of the aluminum-copper alloy pipe fittings of Examples 2-4 are the same as those of Example 1, the difference lies in the extrusion temperature. The main control parameters and performance conditions corresponding to the aluminum-copper alloy pipe fittings 1-4 manufactured in Examples 1-4 are shown in Table 1.
[0051] The main control parameters and performance comparison of the aluminum-copper alloy pipe fittings 1-4 manufactured by the embodiment 1-4 of table 1
[0052]
[0053] It can be seen from Table 1 that with the increase of the pressing temperature; the grain size of the finished aluminum-copper alloy pipe fittings manufactured based on the 1800-ton split die extrusion machine first becomes thinner and then thickens, and the flaw detection is only performed when the extrusion temperature is Passed at 360°C and 400°C. It shows that the extrusion temperature has a great influence on the grain size and flaw detection of aluminum-coppe...
Embodiment 5
[0055] The manufacturing steps of the aluminum-copper alloy pipe fittings in Embodiment 5 are the same as those in Embodiments 1-4, and the difference lies in the different condition parameters in the manufacturing process.
[0056] S1: Heating and heat preservation treatment: put the aluminum-copper alloy ingot into a resistance heat treatment furnace, first raise the temperature to 480°C, and then keep it warm for 5.8 hours; the aluminum-copper weight component ratio of the aluminum-copper alloy ingot is about 99.2 to 99.5 / 0.8~0.5%WT, the size is 178mm in diameter*600mm in length.
[0057] S2: Extrusion treatment: use a 1500-ton split die extrusion machine to extrude the aluminum-copper alloy ingot obtained from the heating and heat preservation treatment to obtain an aluminum-copper alloy tube blank; the vacuum degree is 50Pa, and the mold working zone is 10mm. The pressing temperature is 400°C, the extrusion speed is 6m / s, and the extrusion ratio is 5.
[0058] S3: solut...
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