CuNiSn series alloy and strip billet composition external field horizontal continuous casting preparation method and device

A technology of horizontal continuous casting and external field, which is applied in the field of preparation of CuNiSn elastic copper alloy and strip combination external field horizontal continuous casting, and can solve the problems of easy oxidation of alloy elements, scratches on the inner wall of graphite mold, limited dendrite segregation inhibition ability, etc.

Active Publication Date: 2018-06-22
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the characteristic of the horizontal continuous casting process is that the outer surface of the slab first forms a solidified shell, which limits the reverse segregation of tin elements on the surface of the slab to a certain extent, but the ability to suppress the reverse segregation and dendrite segregation along the casting direction is limited
For dendrite segregation, the existing technology usually adopts alloying means to refine grains and reduce dendrite segregation, such as adding microalloying elements such as Fe, Si, Al, Mn, Cr, Zr, Ti, etc. The research results show that: the above The addition of elements can improve the strength or plasticit

Method used

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  • CuNiSn series alloy and strip billet composition external field horizontal continuous casting preparation method and device
  • CuNiSn series alloy and strip billet composition external field horizontal continuous casting preparation method and device
  • CuNiSn series alloy and strip billet composition external field horizontal continuous casting preparation method and device

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Effect test

Embodiment 1

[0054] A CuNiSn-based elastic alloy strip combined external field horizontal continuous casting equipment, the equipment includes a crystallizer 5, a holding furnace 1, a secondary cooling device 9, and a traction device 10, and a primary water cooling jacket 4 is provided outside the crystallizer 5, The inlet end of the crystallizer 5 extends into the chamber of the holding furnace 1, and the outlet end is provided with a protective atmosphere generating device 6; the protective atmosphere generating device 6 is a nitrogen nozzle 7 arranged on the upper and lower surfaces of the outlet of the crystallizer 5, and the airflow direction of the nozzle 7 faces two Secondary cooling device 9, the nitrogen that nozzle 11 ejects forms air curtain at strip blank 8 periphery; Also be provided with ultrasonic generator 2 in holding furnace 1; A boron nitride ceramic casing with high heat resistance and low ultrasonic attenuation is closed; an electromagnetic induction coil 3 is surrounde...

Embodiment 2

[0056] A method for preparing CuNiSn elastic alloy strip combined external field horizontal continuous casting, comprising the following steps:

[0057] Step 1: Alloy Melting

[0058] The alloy composition (mass percentage) is: Ni: 15wt%; Sn: 8.0wt%; Mn: 0.35wt%; Si: 0.2%; B: 0.06%; Sr: 0.10%; The proportion of the designed CuNiSn elastic alloy components is taken. The alloy components are taken, and the electrolytic copper and nickel are heated to 1400°C in a protective atmosphere. After melting, the furnace temperature is lowered to 1270°C. Then, the Sn, copper-magnesium Alloys, copper-manganese master alloy, copper-cerium master alloy, nickel-boron master alloy, copper-strontium master alloy, copper-vanadium master alloy are respectively added to the melt for melting, adding a slagging agent, stirring and removing slag, and then The surface of the melt is covered with charcoal calcined at 700°C, and the melt is transferred to a holding furnace for heat preservation at 1260...

Embodiment 3

[0077] A method for preparing CuNiSn elastic alloy strip combined external field horizontal continuous casting, comprising the following steps:

[0078] Step 1: Alloy Melting

[0079] The alloy composition (mass percentage) is: Ni: 9.0wt%; Sn: 2.0wt%; Mn: 0.3wt%; Si: 0.2%; B: 0.06%; Sr: 0.10%; V: 0.06; the balance is copper; According to the designed ratio of CuNiSn elastic alloy components, the alloy components are taken, and the electrolytic copper and nickel are heated to 1450°C in a protective atmosphere to melt, and then the furnace temperature is lowered to 1260°C. Then, the Sn, copper-magnesium Master alloys, copper-manganese master alloys, copper-cerium master alloys, nickel-boron master alloys, copper-strontium master alloys, and copper-vanadium master alloys are respectively added to the melt for melting, adding a slagging agent, stirring, and removing slag, Cover the surface of the melt with charcoal that has been calcined at 700°C, and transfer the melt to a holdi...

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Abstract

The invention discloses a CuNiSn series alloy and strip billet composition external field horizontal continuous casting preparation method and device. A CuNiSn series alloy is in a Cu matrix, and meanwhile contains microalloying elements comprising B, Sr and V. The content sum of the microalloying elements comprising B, Sr and V is smaller than or equal to 0.3% of the mass of a CuNiSn series elastic copper alloy matrix. The preparation method comprises the steps of alloy melting and horizontal continuous casting. The technological process of horizontal continuous casting comprises stretching,primary standstill, reverse push, secondary standstill and stretching. The outlet end of a crystallizer of the horizontal continuous casting equipment is provided with a nitrogen nozzle which forms agas curtain on the periphery of a strip billet. An ultrasonic generator sealed by a boron nitride ceramic casing pipe with high heat resistance and low ultrasonic attenuation is further arranged in aheat insulation furnace. The inlet of the crystallizer is annularly sleeved with an electromagnetic induction coil. The prepared CuNiSn series elastic copper alloy has the characteristics of super strength, high stress relaxation resistance and the like, and is applicable to high-performance conductive elastic devices for spaceflight, aviation and microelectronics industry.

Description

technical field [0001] The present invention relates to a kind of CuNiSn system copper alloy and its preparation method and device, in particular to a kind of CuNiSn system elastic copper alloy and the preparation method and device of strip combined external field horizontal continuous casting. The invention belongs to the technical field of high-strength elastic copper alloy and continuous casting preparation. Background technique [0002] Compared with beryllium copper, CuNiSn alloy has many advantages such as low cost, non-toxicity, good corrosion resistance and weldability, high strength and thermal stability at high temperature, etc., and its performance is better than beryllium copper above 250 °C. The series of CuNiSn alloys developed, such as Cu9Ni6Sn series, Cu15Ni8Sn series, Cu9Ni2Sn series and other alloys have been successfully used in sensitive components in relays, potentiometers, switches, connectors and high-precision instrumentation sensors. In the process ...

Claims

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Application Information

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IPC IPC(8): B22D11/045B22D11/18B22D11/22C22C9/06C22C1/03B22D11/115B22D11/114
Inventor 周科朝李周姜业欣肖柱龚深甘雪萍张县委
Owner CENT SOUTH UNIV
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