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Cobalt-chromium-palladium-based brazing alloys

A brazing and alloying technology, applied in molybdenum, multi-component alloys containing cobalt, palladium, chromium, boron and silicon, tungsten, nickel, so that the boron diffusion problem in it is practical, and it can solve the problems of inapplicability and achieve Anti-oxidation, anti-penetration, high temperature strength effect

Inactive Publication Date: 2001-09-05
METGLAS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] For the above reasons, none of the existing alloys are suitable for brazing parts to be used in turbine engines and supersonic space structures, because these parts work in high temperature, high oxidation and high stress environment

Method used

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  • Cobalt-chromium-palladium-based brazing alloys
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  • Cobalt-chromium-palladium-based brazing alloys

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Embodiment 1

[0043] Alloy strips with a width of about 2.54-200 mm (about 0.1-8 inches) and a thickness of about 13-76 microns (0.0005-0.003 inches) can be prepared by combining the components shown in Table 2 The melt is continuously deposited onto a rapidly rotating copper cooling wheel (approximately 3000-6000 ft / min surface speed) using an overpressure of argon gas. A uniform metastable alloy ribbon with a roughly glassy structure can be obtained. The liquidus and solidus temperatures of the alloy ribbons shown in Table 2 can be determined by differential thermal analysis (DTA) techniques. The individual samples are heated next to each other at a uniform rate with an inert reference material, and the temperature difference between the individual samples is measured and expressed as a function of temperature. Thus, draw a thermal phase diagram (the relationship between heating energy change and temperature), from which the temperature of the melting start point and end point can be rea...

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Abstract

This invention relates to brazing metals composed of cobalt-chromium-palladium-based alloys containing transition metals such as cobalt, nickel, tungsten, molybdenum and certain metalloids; and more particularly to multicomponent alloys containing cobalt, chromium, palladium, nickel, tungsten, molybdenum, boron, and silicon, which are especially useful for brazing metals at high temperatures to produce high strength, high oxidation and high temperature and corrosion-resistant brazements. Alloys of the present invention have a composition represented by the formula: CraNibWcPddSieBfCObal. (plus incidental impurities), where the subscripts 'a', 'b', 'c', 'd', 'e' and 'f' are in atomic percent and 'a' is in the range of about 15 and about 22, 'b' is between about 0 and about 20, 'c' is in the range of about 1 to about 5, 'd' is between about 1 and about 10, 'e' is in the range of about 5 and about 12, and 'f' is between about 5 to about 12 and 'bal' is the balance amount to total 100 percent.

Description

Background of the invention [0001] 1. field of invention [0002] The present invention relates to a brazing metal whose composition is a cobalt-chromium-palladium-based alloy containing transition metals such as cobalt, nickel, tungsten, molybdenum and certain non-metallic elements; , palladium, nickel, tungsten, molybdenum, boron and silicon multi-component alloys, these components are especially beneficial for brazing metals to produce high strength, high oxidation resistance, high temperature resistance and corrosion resistance brazing at high temperature. The chemical formula of alloy composition of the present invention is: [0003] Cr a Ni b W c PD d Si e B f co bal .(plus occasional impurities), where the subscripts "a", "b", "c", "d", "e" and "f" are atomic percent, and the value of "a" is about 15-22," The b" value is about 0-20, the "c" value is about 1-5, the "d" value is about 1-10, the "e" value is about 5-12, and the "f" value is about ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K35/02B23K35/30C22C45/04
CPCB23K35/0244B23K35/0233B23K35/3046C22C45/04
Inventor A·拉宾金
Owner METGLAS INC