Non-vacuum up-drawing continuous casting production process of copper-chromium-zirconium alloy rod material

Through the non-vacuum casting process, the coating agent, nitrogen and ceramic tube graphite molds are used to solve the problems of low efficiency of vacuum smelting process and uneven material structure, and efficient and uniform preparation of copper chromium zirconium alloy rods is achieved.

CN119702980AInactive Publication Date: 2025-03-28INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202411897652.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-03-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The vacuum smelting process of existing copper-chromium zirconium alloys is low in efficiency and high energy consumption. The prepared ingots are prone to defects such as component segregation and loose tissue, resulting in uneven material structure.

Method used

The non-vacuum over-induction continuous casting process is adopted, and the copper-chromium-zirconium alloy rod with good surface quality is stably and continuously pulled out by adding cover agent and filling nitrogen, adjusting process parameters, and using graphite molds with embedded ceramic tubes.

Benefits of technology

It improves production efficiency, improves the surface quality of copper-chromium zirconium alloy rods, avoids defects such as small cracks and blackening on the surface, and ensures the composition uniformity and tissue uniformity of the material.

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Abstract

The invention provides a non-vacuum up-drawing continuous casting production process of a copper-chromium-zirconium alloy rod material. The non-vacuum up-drawing continuous casting production process specifically comprises the following steps: adding electrolytic copper into a smelting furnace, adding a covering agent, intermittently filling nitrogen into the surface of the covering agent, heating until the covering agent is molten, adding a chromium raw material, and adding a copper-zirconium intermediate alloy; before up-drawing continuous casting, a graphite mold is installed at the bottom of a water-cooling copper sleeve, asbestos and a graphite protective sleeve are installed outside the mold, then the mold is installed on a traction rack, the head of a stainless steel traction rod is connected with a pure copper drawing head and placed into a crystallizer, and a water-cooling system is started after installation is completed; and upward continuous casting is conducted, specifically, a crystallizer is placed below the liquid level of the melt, a traction device is started, and the copper-chromium-zirconium alloy rod is cast according to preset traction parameters. And meanwhile, a servo motor is started, and the pure Cr wire and the pure Zr wire are automatically fed into the copper liquid. The method has the advantages that the graphite die can be prevented from becoming rough due to surface reaction in the pull casting process, the surface of a continuous casting rod material is bright, and the upward continuous casting process is continuously and stably carried out.
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