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Method for casting and rolling medium-high strength aluminum alloy sheets and strips
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An aluminum alloy strip, high-strength technology, applied in metal rolling and other directions, can solve problems such as poor solidification and forming performance, poor fluidity of Mg-containing alloys, cold-shock defects, etc., and achieve good application prospects, easy industrialization, and surface quality Good results
Inactive Publication Date: 2012-02-01
NORTHEASTERN UNIV LIAONING
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Problems solved by technology
The solid-liquidus line temperature range of aluminum alloy is wide, and the Mg-containing alloy has poor fluidity and poor solidification and forming properties. During the casting and rolling crystallization process, the surface of the billet is prone to cold shut defects, and the surface quality cannot pass the test; Depending on the level, the roll diameter of ordinary standard casting and rolling mills is as small as Φ600-800mm, and the casting-rolling area is 50-60mm shorter. Under such conditions, casting and rolling cannot be formed.
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Embodiment 1
[0023] The connection relationship between the casting roll, nozzle and graphite plate is as follows figure 1 As shown, the nozzle 8 is in contact with the upper casting roll 1 and the lower casting roll 5 respectively, the upper casting roll 1 is assembled with the upper lubricating device 2, the lower casting roll 5 is assembled with the lower lubricating device 4, and the crucible furnace The aluminum alloy melt 6 is poured out in 7, and enters the casting and rolling area through the nozzle 8, and is cast and rolled into a cast and rolled strip 3.
[0024] The assembly method of the upper and lower lubricating device and the casting roll is as follows: figure 2 As shown, the upper lubricating device 2 and the lower lubricating device 4 share a screw 12, the screw 12 is covered with an upper nut 11 and a lower nut 13, the upper nut 11 is pressed under the upper graphite plate 10, and the lower nut 13 is pressed against the lower graphite plate Above 14, the right end of t...
Embodiment 2
[0029] The structure of the device used in the casting and rolling is the same as in Embodiment 1, except that the length of the casting and rolling zone is 75 mm.
[0030]The 6055 aluminum alloy melt was smelted, and the aluminum alloy melt was cast-rolled by a casting-rolling machine. The casting-rolling method was the same as that in Example 1, except that the casting-rolling speed was 1.1-1.2 m / min to obtain an aluminum alloy plate.
[0031] The surface of the aluminum alloy plate is smooth, without discontinuities such as grooves, and its performance meets the national standards.
Embodiment 3
[0033] The structure of the device used in the casting and rolling is the same as in Embodiment 1, except that the length of the casting and rolling zone is 80 mm.
[0034] The 7075 aluminum alloy melt was smelted, and the aluminum alloy melt was cast-rolled by a casting-rolling machine. The casting-rolling method was the same as that in Example 1, except that the casting-rolling speed was 1.2-1.3 m / min to obtain an aluminum alloy plate.
[0035] The surface of the aluminum alloy plate is smooth, without discontinuities such as grooves, and its performance meets the national standards.
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Abstract
The invention discloses a method for casting and rolling medium-high strength aluminum alloy sheets and strips. The method comprises the following steps of: smelting aluminum alloy melt; and casting and rolling the aluminum alloy melt by using a casting and rolling machine, wherein the casting and rolling nozzle and the casting and the rolling roller are required to be contacted with each other and in a break-in state, and simultaneously a lubricating device and the casting and rolling roller are contacted with each other and in the break-in state for casting and rolling the aluminum alloy melt into medium-high strength aluminum alloy sheets or strips; the length of a casting and rolling area is at least 70 mm, and the casting and rolling speed is 1 to 1.6m / min. By using the method of theinvention, the medium-high strength aluminum alloy sheets and strips which have good surface quality and performance meeting requirements can be obtained on the basis of conventional equipment condition. The method has the characteristics of simple scheme, easy implementation of industrialization and good application prospect.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a casting and rolling method of medium and high strength aluminum alloy plates and strips. Background technique [0002] At present, the blanks used in many aluminum alloy plate or strip products are produced by hot rolling method, but the hot rolling method has many processes, large project investment, high production cost, and slow yield. From an economic point of view, it is suitable for casting and rolling production. 5052 aluminum alloy blank. Relevant data show that the casting and rolling technology in foreign countries is mature, but the development of aluminum alloy casting and rolling technology is still rare in China. The root cause is mainly determined by the characteristics of aluminum alloy itself and the equipment capacity of casting and rolling machines. The solid-liquidus line temperature range of aluminum alloy is wide, and the Mg-containing alloy has poor f...
Claims
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Application Information
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