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A method for producing high-strength copper alloy large-scale ingots by vacuum melting

A technology for vacuum smelting and copper alloys, which is used in the field of vacuum smelting to produce large-scale ingots of high-strength copper alloys. Effect

Active Publication Date: 2021-08-06
江苏隆达超合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve or avoid the serious Sn segregation problem and the shrinkage porosity or shrinkage defects of the ingot when the smelting and casting method is used to produce the ingot, and to provide a vacuum smelting method to produce high-strength copper. Alloy Large Size Ingot Casting Method

Method used

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  • A method for producing high-strength copper alloy large-scale ingots by vacuum melting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this embodiment, a method for producing high-strength copper alloy large-scale ingots by vacuum smelting is obtained by the following method:

[0027] (1) Ingredients: the raw materials used and their proportioning ratio are shown in Table 1,

[0028] Table 1

[0029] Element Grade standard mass percentage Electrolytic copper Cu99.95 GB / T467-2010 76.30％ Electrolytic nickel Ni99.95 GB / T6515-2010 14.00％ Tin ingots Sn99.95 GB / T 728-2010 9.00％ Niobium bar Nb1 GB / T 14842-2010 0.10％ Electrolytic manganese JMn98 GB / T 2774-2010 0.60％

[0030] (2) Mold drying: put the cast iron mold into a drying furnace and heat it to 900°C, and dry it for 1 hour;

[0031] (3) Furnace loading: First load tin ingots, cut and pave the entire bottom of the crucible, add electrolytic nickel above the tin ingots, add niobium in the middle of the crucible, and finally add electrolytic copper, electrolytic manganese is added fro...

Embodiment 2

[0040] In this embodiment, a method for producing high-strength copper alloy large-scale ingots by vacuum smelting is obtained by the following method:

[0041] (1) Ingredients: the raw materials used and their proportioning ratio are shown in Table 2,

[0042] Table 2

[0043] Element Grade standard mass percentage Electrolytic copper Cu99.95 GB / T467-2010 76.60％ Electrolytic nickel Ni99.95 GB / T6515-2010 15.00％ Tin ingots Sn99.95 GB / T 728-2010 8.00％ Niobium bar Nb1 GB / T14842-2007 0.20％ Electrolytic manganese JMn98 GB / T 2774-2008 0.20％

[0044] (2) Mold drying: put the cast iron mold into a drying furnace and heat it to 800°C, and dry it for 2 hours;

[0045] (3) Furnace loading: First load tin ingots, cut and pave the entire bottom of the crucible, add electrolytic nickel above the tin ingots, add niobium in the middle of the crucible, and finally add electrolytic copper, electrolytic manganese is added fro...

Embodiment 3

[0055] In this embodiment, a method for producing high-strength copper alloy large-scale ingots by vacuum smelting is obtained by the following method:

[0056] (1) Ingredients: the raw materials used and their proportioning ratio are shown in Table 3,

[0057] table 3

[0058] Element Grade standard mass percentage Electrolytic copper Cu99.95 GB / T467-2010 76.45％ Electrolytic nickel Ni99.96 GB / T6515-2010 16％ Tin ingots Sn99.97 GB / T 728-2010 7％ Niobium bar Nb1 GB / T14842-2007 0.15％ Electrolytic manganese JMn98 GB / T 2774-2008 0.40％

[0059] (2) Mold drying: put the cast iron mold into a drying furnace and heat it to 700°C, and dry it for 4 hours;

[0060] (3) Furnace loading: First load tin ingots, cut and pave the entire bottom of the crucible, add electrolytic nickel above the tin ingots, add niobium in the middle of the crucible, and finally add electrolytic copper, electrolytic manganese is added from the ...

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Abstract

The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a method for producing high-strength copper alloy large-scale ingots by vacuum melting. The present invention is characterized in that it contains the following components and mass percentages: 14-16% nickel, 7-9% tin, 0-0.2% niobium, 0-0.8% manganese, and the balance is copper and other impurities. The invention comprises the following steps: batching, casting mold drying, furnace loading, vacuuming, smelting, furnace removal, heat preservation and cooling. The advantages are: niobium and manganese are added to the copper-nickel-tin alloy, which increases the dispersion strengthening effect of the alloy and is conducive to improving the strength of the alloy; the alloy produced by the vacuum induction melting process is higher in purity than the continuous casting process, and the inclusions Reduction; the mold and the ingot adopt the process of keeping the upper half warm and the second half cooling, which avoids or reduces shrinkage porosity and shrinkage cavity defects, and ensures faster cooling of the ingot, thereby reducing segregation defects.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a method for producing high-strength copper alloy large-scale ingots by vacuum melting. Background technique [0002] Copper-nickel-tin alloys have the characteristics of high strength, elasticity, certain conductivity, excellent corrosion resistance and friction performance, high temperature stress resistance, non-toxicity, and low cost. Among them, Cu-15Ni-8Sn alloys are used After a large deformation heat treatment, due to the decomposition of phases, a periodic amplitude-modulated structure is formed in the alloy, and an ultra-high-strength copper alloy with a tensile strength of 1400 MPa can be obtained, thereby replacing Cu-Be alloys, which has broad application prospects and is therefore very popular. Big attention. [0003] At present, most of the patents on copper-nickel-tin alloys involve the design of components and the production of ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C1/02B22D7/00
CPCB22D7/005C22C1/02C22C9/06
Inventor 高鑫浦海涌李淑苹周向东郑晓飞曾秋婷
Owner 江苏隆达超合金股份有限公司
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