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Method for preparing copper-titanium 50 intermediate alloy through magnetic suspension melting process

A magnetic levitation smelting and intermediate alloy technology, applied in the field of copper alloy preparation, can solve the problems of difficult mixing, volatilization loss of metal elements, deviation of alloy Ti content, etc., and achieve the effect of low gas content, good uniformity and high uniformity

Active Publication Date: 2020-10-13
SIRUI ADVANCED COPPER ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electromagnetic stirring force used by electromagnetic levitation stirring is limited, and the problem of difficult mixing is more likely to occur when preparing an intermediate alloy with a large titanium content. It is often necessary to prolong the melting time to achieve the purpose of mixing evenly, but too long melting time will easily lead to metal elements. Volatilization loss, resulting in large deviation of Ti content in the final alloy

Method used

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  • Method for preparing copper-titanium 50 intermediate alloy through magnetic suspension melting process
  • Method for preparing copper-titanium 50 intermediate alloy through magnetic suspension melting process
  • Method for preparing copper-titanium 50 intermediate alloy through magnetic suspension melting process

Examples

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Effect test

Embodiment 1

[0027] A method for preparing a copper-titanium 50 master alloy using a magnetic levitation smelting process, comprising the following steps:

[0028] (1) Ingredients: Proportion the copper alloy elements according to the weight percentage of 50.5% Ti and Cu as the balance, select and weigh the corresponding raw materials; Ti adopts 0-grade sponge titanium with a purity≧99.7%, and Cu adopts Electrolytic copper plate with purity ≥99.99%;

[0029](2) Alloy smelting pretreatment: The Ti raw material and the Cu raw material are respectively powdered by an electrode induction melting gas atomization system (EIGA method) to obtain Ti powder and Cu powder with a particle size of 150 μm, and the Ti powder and Cu powder After mixing evenly, put it into the crushing chamber of the jet mill, fill in the inert gas to completely isolate the Ti powder and Cu powder from the air, and increase the flow rate of the inert gas to pressurize the Ti powder and Cu powder from two opposite nozzles. ...

Embodiment 2

[0035] A method for preparing a copper-titanium 50 master alloy using a magnetic levitation smelting process, comprising the following steps:

[0036] (1) Batching: according to Ti being 31%-55%, Cu is the weight percent content of surplus to carry out proportioning to copper alloy element, selects and takes by weighing corresponding raw material;

[0037] (2) Magnetic levitation smelting: put the deposited block into the cold crucible of the vacuum magnetic levitation furnace, power on, and vacuumize for about 22min until the vacuum degree reaches 10 -3 Pa, and then rush into argon protection to make the pressure in the furnace reach 0.03MPa. First, increase the power to 110KW at 12KW / min to make the temperature in the furnace reach 1800°C, and heat for 7 minutes until the metal ingot is completely melted and semi-suspended. Under the action of continuous Loren magnetic force, the melt is completely suspended and electromagnetically stirred. , the formed alloy is kept in the...

Embodiment 3

[0042] This example is basically the same as Example 1, except that in step (2) of this example, the Ti raw material and the Cu raw material are respectively powdered by the EIGA method to obtain Ti powder and Cu powder with a particle size of 150 μm. The two metal powders are filled into the product mold for molding, and then the molded compact is sintered in stages. The staged sintering process is first treated at 1380°C for 1 hour, then heated to 1680°C for 1 hour, and sintered copper is obtained after cooling. titanium alloy. Then, the copper-titanium alloy is smelted by magnetic levitation in step (3), and the conditions of other steps are the same as those in Example 1.

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Abstract

The invention discloses a method for preparing a copper-titanium 50 intermediate alloy through a magnetic suspension melting process. The method comprises the following steps that copper alloy elements are matched according to the weight percent content that Ti accounts for 31% to 55%, and the balance is Cu; the metal raw materials are contained in a cold crucible of a vacuum magnetic suspension furnace, powering on is carried out, vacuumizing is carried out, argon is introduced for shielding, power is improved gradiently, the temperature in the furnace is raised, and ingot metal fully melts and is in a half suspended state through joule heat released in the furnace; under the action of continuous long-range magnetic force, the melt is completely suspended, and electromagnetic stirring iscarried out; the formed alloy is continuously kept in a molten state for a period of time, and the alloy ingredients are homogenized; and finally pouring, cooling and outer circle turning are carriedout, and a CuTi50 intermediate alloy bar is obtained. The CuTi50 intermediate alloy prepared through the method has the advantages of being good in uniformity, free of inclusions and oxidation defects, low in gas content and the like, and the method can be used for copper-titanium alloy (the titanium content ranges from 1% to 5%) smelting.

Description

technical field [0001] The invention belongs to the technical field of copper alloy preparation, and in particular relates to a method for preparing a copper-titanium 50 master alloy by using a magnetic levitation smelting process. Background technique [0002] Copper-titanium alloy (1% to 5% Ti content) was developed by the former Soviet Union in the late 1950s. After proper treatment, it has high ductility, elasticity, heat resistance, fatigue resistance, good processing performance and the lowest bending Radius ratio, as well as pulse-free spark performance and good high temperature stress relaxation resistance. Since the beginning of the last century, my country has started the smelting and production process of titanium-copper alloy. According to the production research of Jiangxi Nonferrous Metals Smelter, it uses first-grade sponge titanium and electrolytic copper plates, and uses non-vacuum melting of low-titanium copper alloys. During the production process, depend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C14/00C22C1/02C22C1/03
CPCC22C9/00C22C14/00C22C1/02C22C1/03
Inventor 王沛王群郭创立周斌王文斌苟锁孙君鹏山瑛
Owner SIRUI ADVANCED COPPER ALLOY CO LTD
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