A kind of horizontal continuous casting method of copper alloy

Abstract

The invention discloses a copper alloy horizontal continuous casting method. The method is to carry out horizontal continuous casting of the copper alloy melt in the holding furnace under the side of the holding furnace: at least one multi-channel water-cooled crystallizer is installed under the side of the holding furnace, The multi-channel water-cooled crystallizer is provided with three groups of independent cooling units sequentially along the direction of the billet lead-out, the first group of cooling units is closest to the holding furnace; the temperature of the water inlet of each group of cooling units is lower than 20°C, and the temperature of the three cooling units is controlled. The temperature gradient of the group cooling unit; the outer wall of the water cooling jacket of the first group and the second group cooling unit of the multi-channel water-cooled crystallizer is provided with an electromagnetic induction coil to realize electromagnetic stirring, and a water curtain spray is provided at the outlet of the multi-channel water-cooled crystallizer The cooling device cools the preform to obtain a cast preform in which all alloy elements are in a supersaturated solid solution state. The invention can not only save the high-temperature solid solution link that consumes the most energy in the traditional high-strength and high-conductivity copper alloy preparation process, but also can effectively refine the crystal grains and ensure the high strength of the alloy.

Description

Technical field: [0001] The invention relates to the technical field of nonferrous metal processing, in particular to a method for horizontal continuous casting of copper alloys. Background technique: [0002] As a typical representative of conductor materials, copper alloys are widely used in the field of electrical engineering. With the development of the 5G information age, higher performance requirements are put forward for the key copper alloy conductors used. Taking large-scale integrated circuits as an example, due to the increasingly high level of circuit integration and continuous increase in power density, this requires copper alloys as integrated circuit lead frames to have not only high strength but also high electrical and thermal conductivity, so as to ensure the generation of Lowest possible thermal effect and fast heat dissipation. At the same time, in order to meet the requirements of the semiconductor process, the lead frame copper alloy must also have ex...

AI Technical Summary

Problems solved by technology

However, the existing copper alloy preparation methods introduced into the horizontal continuous casting process cannot obtain a slab in which the alloy elements are in a supersaturated solid solution state in the horizontal continuous casting process, so it is necessary to carry out further high-temperature solution treatment on the slab to make the cast The alloying elements in the slab are in a supersaturated solid solution state, which still needs to be improved in terms of energy saving

The existing continuous extrusion process also generally has the problem of early precipitation and decomposition of supersaturated solid solutions, which affects the strength and electrical conductivity of copper alloys

If you want the material to have a solid solution state before aging, the most direct way is to do a high-temperature solution heat treatment before aging. However, this idea not only consumes high energy, but also leads to the complete loss of the pre-sequence cold rolling hardening effect.

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