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Cladded articles and applications thereof

A technology of cladding and products, applied in the direction of layered products, metal layered products, coatings, etc., can solve the problem of hindered use of wear-resistant surfacing alloys

Active Publication Date: 2017-12-05
KENNAMETAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These defects can hinder the use of hardfacing alloys with high hardness and high wear resistance

Method used

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  • Cladded articles and applications thereof
  • Cladded articles and applications thereof
  • Cladded articles and applications thereof

Examples

Experimental program
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Effect test

example 1

[0051] Example 1 - Clad Frac Valve

[0052]Clad frac valves were prepared according to the following procedure. The nominal composition is 18-20 wt% chromium, 8-10 wt% tungsten, 12-15 wt% nickel, 1.5-2.5 wt% boron, 1-3 wt% iron, 2-4 wt% silicon, 0-1 A -325 mesh infiltrated cobalt powder alloy of wt % manganese, 0.5-2 wt % carbon and the balance cobalt is mixed and blended with 6 vol % PTFE. The resulting powder mixture is machined to trap the alloy particles in a cloth-like flexible sheet.

[0053] The nominal composition is 27-31 wt% chromium, 8-10 wt% tungsten, 0-3 wt% nickel, 1-2 wt% silicon, 0-1 wt% manganese, 0-3 wt% iron, 1-2 A -325 mesh base cobalt powder alloy of wt % carbon with the balance cobalt was mixed and blended with 6 vol % PTFE. The resulting powder mixture is machined to trap the alloy particles in a cloth-like flexible sheet.

[0054] A cloth-like flexible sheet comprising a matrix cobalt powder alloy is attached to the wear surface of the frac valve,...

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Abstract

The invention discloses cladded articles and applications thereof. In one aspect, composite articles are described herein employing cobalt-based alloy claddings exhibiting high hardness and wear resistance while maintaining desirable integrity and adhesion to surfaces of metallic substrates. A composite article, in some embodiments, comprises a metallic substrate and a composite cladding metallurgically bonded to one or more surfaces of the metallic substrate, the composite cladding including cobalt-based alloy having a chromium gradient, wherein chromium content increases in a direction from the composite cladding surface to an interface of the composite cladding with the metallic substrate.

Description

technical field [0001] The present application relates to clad articles of manufacture and, in particular, to frac valves having a cladding of a composite alloy metallurgically bonded thereto. Background technique [0002] Cladding is often applied to equipment subjected to harsh environments or operating conditions to maximize the life of the equipment. Various cladding types and configurations are offered depending on the failure mode to be suppressed. For example, wear-resistant, erosion-resistant, and corrosion-resistant claddings have been developed for metal substrates. In addition, metal or alloy cladding can be applied to the metal substrate by a variety of techniques including welding overlay, plasma transferred arc, thermal spray, laser cladding, infrared cladding, induction cladding, or sintering. [0003] A significant problem encountered in cladding applications is premature failure or degradation of the cladding. Cladding of metal substrates can fail due to ...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/07B22F1/052B22F1/107
CPCC22C19/07C23C24/103B22F1/052B22F1/107E21B43/26B22F2007/066B22F5/10B22F2207/01B22F7/08B32B15/01B22F7/008B22F7/04B22F2007/045B22F2301/15B22F2302/10B22F2302/45B22F2304/10E21B34/06
Inventor D.伯洛托斯J.浮士德M.迈耶Q.郑
Owner KENNAMETAL INC