Multiplex heat treatment method for Cu-12 percent Fe alloy

Abstract

The invention discloses a multiplex heat treatment method for a Cu-12 percent Fe alloy, which comprises the following steps: putting raw materials of 12 mass percent of industrial pure iron and the balance of electrolytic copper into a vacuum induction furnace, heating to 1,400 DEG C to melt under barometric pressure of lower than 0.1Pa, electromagnetically stirring uniformly, standing for 2 to 3min, degassing, introducing Ar in the furnace to 30kPa, and casting into a rodlike cast ingot with the diameter phi of 20.0mm; and performing heating, heat preservation and water cooling on the cast ingot in a vacuum heat treatment furnace at three stages, heating the cast ingot in the heat treatment furnace in a temperature rise rate of average 10 DEG C / min to the aging temperature, preserving heat and cooling in air. The multiplex heat treatment method has the advantages of simply and flexibly controlling parameters, combining homogenization, solution and aging heat treatment of Cu-12 percent of Fe, effectively eliminating microsegregation, avoiding grain coarsening, making precipitated phase particles uniformly distributed, obviously improving hardness and conductivity, and providing good preparation structures for subsequent fiber composite structure processing.

Description

technical field [0001] The invention relates to a copper-based alloy and its preparation, in particular to a composite heat treatment method for a Cu-12% Fe alloy. Background technique [0002] The strength and conductivity of conductor materials generally have an inverse function relationship, that is, increasing the strength often comes at the cost of a serious loss of conductivity. Therefore, efforts to keep materials with high conductivity or to significantly improve conductivity with only a small sacrifice in strength are currently the focus of developing new conductor materials. The fiber-phase composite strengthened copper alloy prepared by adding immiscible alloy elements into the Cu matrix and then undergoing a strong strain method is considered to be the most promising high-strength and high-conductivity material. At present, conductor wires with better performance than conventional materials have been developed. Among them, alloys such as Cu-Ag and Cu-Nb have a b...

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Problems solved by technology

However, at present, this technology generally directly heats the as-cast structure to a high temperature in the solid solution stage, and does not pay attention to the control of the heating rate, nor considers the influence of the dissolution process of the eutectoid structure of the alloy at 850 ° C, and is also prone to elimination of intragranular segregation Phenomena such as incompleteness, coarsening of grains and uneven size are not conducive to the uniform distribution of solid solution solutes, resulting in unsatisfactory adequacy and uniformity of the precipitation of secondary Fe particles during aging, which affects the heat treatment effect and cannot be fully utilized. The strength and electrical conductivity of the alloy

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