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Reduction preparation method of copper-based elastic alloy thin strip

An elastic alloy and weight reduction technology, which is applied in the field of reduction preparation of copper-based elastic alloy thin strips, to achieve the effects of reducing cold rolling reduction, reducing costs, and simplifying the process

Inactive Publication Date: 2018-08-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the traditional production process has been unable to solve these inherent contradictions in this respect

Method used

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  • Reduction preparation method of copper-based elastic alloy thin strip
  • Reduction preparation method of copper-based elastic alloy thin strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Smelt copper alloy according to the designed composition to obtain copper alloy melt, its composition contains Ni 9%, Sn 6%, impurity ≤ 0.05%, and the rest is Cu;

[0027] The copper alloy melt enters the tundish through the gate, the superheat is controlled at 15°C, the tundish preheating temperature is 1100°C, and then poured into a twin-roll thin strip casting machine for continuous casting to make a cast strip with a thickness of 2.0mm. The height of the liquid level is controlled at 50mm during casting, and the speed of the continuous casting rod is 35m / min; the casting strip is cooled by spraying water immediately after it comes out of the casting roll, the cooling speed is controlled at 35°C / s, and it is coiled at 400°C; the metallographic structure of the cast strip and Special twin boundary distribution such as figure 1 As shown, the cast strip structure element segregation distribution is as follows figure 2 As shown, it can be seen from the figure that the ...

Embodiment 2

[0031] Method is with embodiment 1, and difference is:

[0032] (1) The composition of the copper alloy melt contains 15% Ni and 8% Sn by mass percentage;

[0033] (2) Control superheat to 25°C, tundish preheating temperature to 1150°C, casting strip thickness to 3.0mm, control liquid level height to 100mm during continuous casting, continuous casting rod speed to 45m / min; control cooling after casting strip comes out of casting roll Speed ​​40℃ / s, coiling at 380℃;

[0034] (3) The total reduction rate of cold rolling is 95%; the thickness of cold rolling strip is 0.15mm;

[0035] (4) The aging treatment temperature is 450°C and the time is 2h. The tensile strength of the copper-based elastic alloy thin strip is 1327MPa, the electrical conductivity is 16.5%IACS, and the elastic specific work is 5.367GPa.

Embodiment 3

[0037] Method is with embodiment 1, and difference is:

[0038] (1) The composition of the copper alloy melt contains 7.5% Ni and 5% Sn by mass percentage;

[0039] (2) Control superheat to 20°C, tundish preheating temperature to 1200°C, casting strip thickness to 1.0mm, control liquid level height to 80mm during continuous casting, continuous casting rod speed to 40m / min; control cooling after casting strip comes out of casting roll Speed ​​45℃ / s, coiling at 350℃;

[0040] (3) The total reduction rate of cold rolling is 85%; the thickness of cold rolling strip is 0.15mm;

[0041] (4) The aging treatment temperature is 380°C and the time is 6h. The tensile strength of the copper-based elastic alloy thin strip is 1050MPa, the electrical conductivity is 18.2%IACS, and the elastic specific work is 4.567GPa.

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Abstract

The invention relates to a reduction preparation method of a copper-based elastic alloy thin strip. The reduction preparation method of the copper-based elastic alloy thin strip is carried out according to the following steps of (1) smelting a copper alloy according to design compositions so as to obtain a copper alloy melt, wherein the compositions contain (in percentage by mass): 7.5 to 15 percent of Ni, 5 to 10 percent of Sn, less than or equal to 0.05 percent of impurities, and the balance Cu; (2) pouring into a tundish, controlling the degree of superheat to be 15 to 40 DEG C, then pouring into a twin roll strip continuous casting for continuously casting, discharging a casting strip out of a casting roller, then water cooling, controlling the cooling speed to be larger than or equalto 35 DEG C / s, and coiling at 250 to 400 DEG C; (3) cold rolling at a single stage, and obtaining a cold rolling strip; and (4) carrying out aging treatment on the cold rolling strip at 350 to 450 DEGC. According to the method provided by the invention, the segregation of the Sn element can be effectively inhibited, the processes such as homogenizing annealing, hot rolling and solution treatmentin a traditional process are omitted, the process is simplified, the cost is reduced, and the resources are saved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for reducing the weight of a copper-based elastic alloy strip. Background technique [0002] As an important functional material, copper-based elastic alloy has high strength and high elasticity, good mechanical properties, excellent electrical and thermal conductivity, corrosion resistance and high temperature resistance, and is used in current-carrying elastic components, electronic power, instrumentation, conductive components, etc be widely used. As a solute atom, Sn dissolves in the lattice with Cu atoms as the solvent to form a solid solution, but because the solubility of Sn element in Cu is limited, and its solubility decreases sharply with the decrease of temperature, when Sn exceeds a certain amount, Sn element will be Serious segregation will occur. On the one hand, the traditional production process includes tedious processes such as long-time...

Claims

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Application Information

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IPC IPC(8): B22D11/06C22C1/02C22C9/06
CPCB22D11/004B22D11/0622C22C1/02C22C9/06
Inventor 曹光明王志国李成刚张元祥陈晨刘振宇王国栋
Owner NORTHEASTERN UNIV
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