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High-strength homogeneous copper-nickel-tin alloy and preparation method

A technology of tin alloys and alloys, applied in the field of preparing high-strength homogeneous copper-nickel-tin alloys, which can solve problems such as harmful segregation and porosity

Active Publication Date: 2020-03-27
MATERION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Copper-nickel-tin alloys exhibit very high solidification intervals, which lead to unwanted segregation and porosity in conventional molten and cast alloys

Method used

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  • High-strength homogeneous copper-nickel-tin alloy and preparation method
  • High-strength homogeneous copper-nickel-tin alloy and preparation method
  • High-strength homogeneous copper-nickel-tin alloy and preparation method

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Embodiment

[0062] Controlled tensile testing according to ASTM E8, using specimens cast to shape and size for measurement of mechanical properties. Various alloys are cast by pressure assisted casting and homogenization (ie, heat treatment) at temperatures ranging from 5000 psi to 15000 psi and from 1525°F to 1675°F. The sample was then subjected to metastable decomposition at 700°F to 750°F for 1 hour to 5 hours, followed by air cooling. No further machining and surface treatment is carried out. Table 3 lists the properties of these castings.

[0063] table 3.

[0064] performance category sample 0.2% Compensated Yield Strength (psi) Ultimate Tensile Strength (psi) Total elongation, % high strength A 128,300 129,100 7.1 high strength B 126,100 135,600 2.7 high strength C 121,400 128,100 2.9 high elongation D 26,400 60,300 41.4 high elongation E 27,300 65,400 42.4 high elongation F 27,500 65,000 50.4

[0065] ...

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Abstract

The present invention provides a method of making a high strength homogeneous copper-nickel-tin alloy comprising: preparing a molten mixture of copper, nickel and tin; pressure assisted casting the molten mixture to form a casting; and Castings are heat treated. The alloys enable new combinations of properties to be obtained.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application Serial No. 61 / 954,084, filed March 17, 2014, the entire contents of which are incorporated herein by reference. Background technique [0003] The present disclosure relates to a copper-nickel-tin alloy and methods for making the alloy. The alloy is a homogeneous alloy and exhibits high strength and elongation. [0004] Copper-nickel-tin alloys exhibit very high solidification intervals, which lead to unwanted segregation and porosity in conventional molten and cast alloys. In particular, such alloys containing from about 9% to about 15% by weight nickel and from about 6% to about 8% by weight tin exhibit these disadvantages. [0005] It would be desirable to develop new high strength homogeneous copper-nickel-tin alloys and methods for making the alloys. Contents of the invention [0006] The present disclosure relates to copper-nickel-tin alloys ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00
CPCC22F1/08C22F1/002C22C9/06B22D21/025B22D18/00C22C1/02C22F1/057
Inventor W·雷蒙德·克里布弗里茨·格伦辛
Owner MATERION