Semi-continuous metal casting process of novel heat-resistant copper alloy and application of novel heat-resistant copper alloy

Abstract

The invention discloses a semi-continuous metal casting process of a novel heat-resistant copper alloy and application of the novel heat-resistant copper alloy. The copper alloy comprises, by weight, 0.1%-5.0% of Ni, 0.01%-0.5% of Al, 0.01%-2.0% of Si, 0.01%-1.0% of Cr and the balance Cu. The preparation processes of a copper alloy profile include burdening, smelting, hot extrusion, cold drawing and aging treatment. According to the semi-continuous metal casting process of the novel heat-resistant copper alloy and the application of the novel heat-resistant copper alloy, on the basis of a copper alloy material containing Ni and Al, Si and Cr elements are further added, the reasonable ratio of all metal elements is balanced through semi-continuous casting, the performance of a nickel-silicon-copper alloy is improved, the Be-free and Co-free CuNi2SiCrAl high-performance copper alloy is developed and used for replacing beryllium-cobalt-copper series alloys, meanwhile, the raw material cost of the material is greatly reduced, and the copper alloy can be applied to a slot wedge copper alloy part of a steam turbine generator.

Description

technical field [0001] The invention relates to the technical field of copper alloy manufacturing and processing, in particular to a semi-continuous metal casting process of a novel heat-resistant copper alloy and its application. Background technique [0002] With the rapid increase in demand for electricity, the design of large-capacity generator sets has been paid more and more attention. However, some key components, such as the generator rotor slot wedge copper alloy, mainly rely on imports. The generator rotor is the most critical part of the turbogenerator set. The core component, when working, the turbogenerator rotor generates a huge centrifugal force when it runs at high speed, and at the same time, under the action of the magnetic field generated by the rotor current, a large induced current will be generated on the rotor surface. This current passes through the rotor slot wedge copper Alloying will cause it to generate a higher temperature, and cracks will be gen...

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Problems solved by technology

[0002] With the rapid increase in demand for electricity, the design of large-capacity generator sets has been paid more and more attention. However, some key components, such as the generator rotor slot wedge copper alloy, mainly rely on imports. The generator rotor is the most critical part of the turbogenerator set. The core component, when working, the turbogenerator rotor generates a huge centrifugal force when it runs at high speed, and at the same time, under the action of the magnetic field generated by the rotor current, a large induced current will be generated on the rotor surface. This current passes through the rotor slot wedge copper Alloying will cause it to generate a higher temperature, and cracks will be generated under the overlapping effects of shutdown and creep, and may promote the further development of cracks, resulting in the fracture of the slot wedge alloy and causing the slot wedge to fly off, which may not only make the value hundreds of millions of yuan The explosion of the generator set will also cause major casualties

[0003] At present, alloys such as CuCo2BeZr and CuNi2Be, which are widely used in slot wedges, have reached the level of similar imported products in terms of performance, but the Be element is poisonous, and the trace steam generated in the process of melting, casting and heat treatment will have a greater poisonous effect on the human body and the environment. The international community has long called for the development of Be-free alloys to replace Be-containing alloys.

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