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Non-vacuum casting and forming method of chromium zirconium copper alloy plate for continuous casting crystallizer

A continuous casting crystallizer and forming processing technology, which is applied in the field of non-ferrous metal alloy smelting and processing, can solve the problems of low production efficiency, product specification restrictions, high production costs, etc., and achieve the effect of improving production efficiency and reducing costs

Inactive Publication Date: 2013-04-03
江西九星铜业有限公司
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  • Claims
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Problems solved by technology

[0004] In order to overcome the deficiencies in the above-mentioned existing production technology, the object of the present invention is to provide a non-vacuum casting and forming processing method for chromium-zirconium-copper alloy plates for continuous casting crystallizers, which solves the problems of high production cost, low production efficiency, The product specifications are limited by the capacity of the vacuum furnace. After the billet is hot-rolled or hot-forged, solution treated, cold-rolled or cold-forged, and aging precipitation hardening treatment, the copper alloy plate for continuous casting crystallizer with the required performance requirements can be obtained.

Method used

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  • Non-vacuum casting and forming method of chromium zirconium copper alloy plate for continuous casting crystallizer

Examples

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Effect test

Embodiment 1

[0026] In this embodiment, the chemical composition (wt%) of the chromium-zirconium-copper alloy is: Cr 1.0%, Zr 0.45%, Mg 0.02%, rare earth element La 0.05%, and the rest is copper.

[0027] The non-vacuum smelting and processing molding method of the chromium-zirconium copper alloy plate for the continuous casting crystallizer of the present embodiment is carried out according to the following steps:

[0028] 1. First make CuCr and CuZr master alloys from easily oxidized elements such as Cr and Zr, and use them as raw materials added later;

[0029] 2. If figure 1 As shown, select 1.2 tons of standard cathode copper that meets the quality requirements, join in 1.5 tons of intermediate frequency induction furnace, add a sufficient amount of dehydrated borax and glass as covering agent at the same time, here, the weight ratio of dehydrated borax and glass is set to 3: 1. Melt the cathode copper. Among them, the covering agent is covered on the copper melt to avoid direct con...

Embodiment 2

[0031] The difference from Example 1 is that in this example, the chemical composition (wt%) of the chromium-zirconium copper slab is: Cr0.82%, Zr0.015%, Mg0.012%, rare earth element La0.01%, and the rest for copper.

[0032] Among them, the processing rate of hot rolling or hot forging is controlled at 55%; cold rolling or cold forging adopts three-pass small processing rate (processing rate is controlled at 25%); the solution treatment temperature is 850°C, and the aging precipitation hardening temperature is 400°C .

[0033] In the present embodiment, the physical property test value of this plate is: σ b =545MPa, σ s =443MPa, δ=32%, HB=129, conductivity 87% IACS.

Embodiment 3

[0035] The difference from Example 1 is that in this example, the chemical composition (wt%) of the chromium-zirconium copper slab is: Cr0.99%, Zr0.02%, Mg0.01%, rare earth element Ce0.04%, the rest for copper.

[0036] Among them, the processing rate of hot rolling or hot forging is controlled at 65%; cold rolling or cold forging adopts five-pass small processing rate (processing rate is controlled at 30%); the solution treatment temperature is 800°C, and the aging precipitation hardening temperature is 500°C .

[0037] In the present embodiment, the physical property test value of this plate is: σ b =565MPa, σ s =462MPa, δ=30%, HB=132, conductivity 84% IACS.

[0038] The results show that the present invention solves the problems of complex process, high production cost and low production efficiency in the existing vacuum melting and casting process, and the input cost of the non-vacuum melting and casting equipment is only about 1 / 10 of the vacuum furnace melting and cas...

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Abstract

The invention belongs to the field of smelting and processing non-ferrous metal alloys and in particular relates to a non-vacuum casting and forming method of a chromium zirconium copper alloy plate for a continuous casting crystallizer. The method comprises the steps of manufacturing Cr and Zr as intermediate alloys CuCr and CuZr for future use, preparing the alloy casting blank, adding cathode copper, a covering agent and the intermediate alloy CuCr to a sense furnace together, electrifying and melting, then adding the intermediate alloy CuZr, Mg and rare earth metals, heating till melting fully, pouring, and obtaining the alloy casting blank, forming the alloy casting blank by hot rolling or hot forging processing, and finally obtaining the plate for the crystallizer with performance meeting the demand after melting solid, cold rolling or cold forging, precipitating and hardening via aging. The problems of complex process, high production cost and low production efficiency existed in the present vacuum casting process production are solved by the invention. The investment cost of the non-vacuum casting device is only about 1 / 10 that of the vacuum casting device while the production efficiency is more than twice that of the vacuum furnace with the same capacity.

Description

technical field [0001] The invention belongs to the field of smelting and processing of non-ferrous metal alloys, and specifically relates to a non-vacuum smelting and processing method for chromium-zirconium-copper alloy plates for continuous casting crystallizers, which is mainly used in the iron and steel industry for high-strength and high-conductivity chromium-zirconium-copper alloys for continuous casting steel Non-vacuum melting and processing of copper alloy plates for crystallizers. Background technique [0002] At present, the vacuum melting and casting process is generally used in China to produce chrome-zirconium-copper alloy plates. For example: China's invention patent application (application number 01125019.4) discloses a continuous casting mold copper plate material melting and processing molding process, its material composition (%) is: Cr0.55-0.85, Zr0.15-0.25, Mg0. 01-0.02, trace rare earth, the rest is Cu; the material is smelted in a vacuum state, refi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/057C22C1/03C22C9/00C22F1/08B22D21/00
Inventor 李文君刘刚王瑛
Owner 江西九星铜业有限公司
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