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Method for producing high-strength copper alloy large-sized cast ingot by vacuum melting

A vacuum smelting and copper alloy technology, applied in the field of vacuum smelting to produce high-strength copper alloy large-scale ingots, can solve the problems of Sn segregation ingots, shrinkage porosity or shrinkage cavities, etc., to reduce inclusions, improve strength, and increase dispersion strengthening effect of effect

Active Publication Date: 2020-04-17
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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  • Method for producing high-strength copper alloy large-sized cast ingot by vacuum melting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this embodiment, a method for producing high-strength copper alloy large-scale ingots by vacuum smelting is obtained by the following method:

[0032] (1) Ingredients: the raw materials used and their proportioning ratio are shown in Table 1,

[0033] Table 1

[0034] 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％

[0035] (2) Mold drying: put the cast iron mold into a drying furnace and heat it to 900°C, and dry it for 1 hour;

[0036] (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

[0045] In this embodiment, a method for producing high-strength copper alloy large-scale ingots by vacuum smelting is obtained by the following method:

[0046] (1) Ingredients: the raw materials used and their proportioning ratio are shown in Table 2,

[0047] Table 2

[0048] 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％

[0049] (2) Mold drying: put the cast iron mold into a drying furnace and heat it to 800°C, and dry it for 2 hours;

[0050](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...

Embodiment 3

[0060] In this embodiment, a method for producing high-strength copper alloy large-scale ingots by vacuum smelting is obtained by the following method:

[0061] (1) Ingredients: the raw materials used and their proportioning ratio are shown in Table 3,

[0062] table 3

[0063] 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％

[0064] (2) Mold drying: put the cast iron mold into a drying furnace and heat it to 700°C, and dry it for 4 hours;

[0065] (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 specifically relates to a method for producing a high-strength copper alloy large-sized cast ingot by vacuum melting. The high-strength copper alloy large-sized cast ingot is characterized by comprising the following components according to mass percent: 14 to 16% of nickel, 7 to 9% of tin, 0 to 0.2% of niobium, 0 to0.8% of manganese and the balance of copper and other impurities. The method comprises the following steps of preparing, drying a mold, charging a furnace, vacuumizing, smelting, discharging, insulating and cooling. The method has the advantages that niobium and manganese elements are added on the basis of copper-nickel-tin alloy, so that the dispersion strengthening effect of the alloy is increased, and the strength of the alloy is increased; compared with a continuous casting process, the alloy produced by adopting a vacuum induction smelting process has the advantages of high purity and inclusion reduction; and the upper half insulating and lower half cooling process is adopted on the mold and the cast ingot, so that the defects of shrinkage porosity and shrinkage cavities are avoided or reduced, the cast ingot cooling speed is increased, and the segregation defect is reduced.

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 Applications(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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