Water wiping device for casting hard aluminum alloy

Abstract

The invention relates to the technical field of water wiping devices for casting hard aluminum alloy cast ingots, in particular to a water wiping device for casting hard aluminum alloy. According to the water wiping device for casting the hard aluminum alloy, the water wiping device is arranged below a crystallizer, water wiping rings with the shape of openings identical to that of the section of a cast ingot are arranged, and the water wiping device comprises a fixing device, a water wiping device frame, the water wiping rings and drainage openings. One end of the fixing device is connected with the outer wall of the water wiping device frame, and the other end of the fixing device is provided and connected with the crystallizer. The water wiping rings are arranged at the bottom end of the water wiping device frame, and the drainage openings are formed in the side wall of the water wiping device frame. The integral type water wiping device frame and the high temperature resisting fluororubber water wiping rings are adopted, the water sealing performance is increased, it is guaranteed that in the casting process, after the cast ingot passes through the water wiping device, cooling water cannot be leaked out of clearances to flow to the surface of the iron casting, and local supercooling of the cast ingot cannot occur, the probability that the cast ingot is cracked can be greatly lowered, the casting success rate of hard aluminum and superhard aluminum alloy slab ingots or round ingots is improved, and the water wiping device is suitable for casting the hard aluminum alloy cast ingot of the large specification.

Description

technical field [0001] The invention relates to a wiper technology for casting hard aluminum alloy ingots, belonging to the technical field of aluminum alloy casting. Background technique [0002] Al-Zn-Mg-Cu series aluminum alloy is an ultra-high-strength aluminum alloy with high strength, toughness and stress corrosion resistance. It has extremely high comprehensive performance and is suitable for aviation, aerospace and other fields. However, the high-strength Al-Zn-Mg-Cu aluminum alloy ingot has a complex composition, high degree of alloying, a wide crystallization temperature range, poor high and low temperature plasticity, and a high tendency to crack in the ingot. Difficult to form and thus have a high tendency to form hot and cold cracks. [0003] In the direct water-cooling semi-continuous casting of highly alloyed Al-Zn-Mg-Cu superhard aluminum alloy ingots, during the crystallization and solidification cooling process of the ingots, the solidification shrinkage w...

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Problems solved by technology

[0004] A water retaining plate technology has also been proposed in China. For example, Chinese patent 200810023941.1 discloses a design method of a water retaining device for hard aluminum alloy semi-continuous casting. Poor, it is easy to make the cooling water leak and splash on the surface of the ingot at the lower part of the water baffle, causing local overcooling of the ingot and increasing the local internal stress of the ingot, resulting in cracking of the ingot

Moreover, the current domestic water barrier technology can only be applied to the casting of small-sized ingots, and can only be used experimentally for the production of hard alloy flat ingots with a size of 180mm×360mm, and for industrial production of large-sized hard aluminum alloy castings. There is no relevant report on the wiper technology for ingot casting

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