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Corrosion-resistant nickel-base alloy overlay welding powder

A nickel-based alloy, alloy powder technology, applied in welding medium, welding equipment, metal processing equipment and other directions, can solve problems such as poor effect, and achieve the effect of improving service life and good workmanship

Active Publication Date: 2015-04-01
TIANJIN ZHUJIN METAL SURFACE ENG MATERIALTECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Corrosion-resistant nickel-based alloys have many patents in the world, such as Hastelloy C276, Inconel 625, etc., which are used in drilling tools for oil and gas wells with high sulfur content in my country, but the effect is still not good

Method used

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  • Corrosion-resistant nickel-base alloy overlay welding powder
  • Corrosion-resistant nickel-base alloy overlay welding powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A corrosion-resistant nickel-based alloy surfacing powder, calculated in % by weight, is composed of the following components:

[0017] Cr 20 Mo 10 Co 6 Zr 0.5 RE 0.5 Mn 1 Si 2

[0018] B 1.5 Ni balance Impurity content 0.05

Embodiment 2

[0020] A corrosion-resistant nickel-based alloy surfacing powder, calculated in % by weight, is composed of the following components:

[0021] Cr 24 Mo 12 Co 7 Zr 0.8 RE 0.8 Mn 1.2 Si 2.3

[0022] B 1.8 Ni balance Impurity content 0.05

Embodiment 3

[0024] A corrosion-resistant nickel-based alloy surfacing powder, calculated in % by weight, is composed of the following components:

[0025] Cr 28 Mo 14 Co 8 Zr l RE 1 Mn 1.5 Si 2.5

[0026] B 2 Ni balance Impurity content 0.05

[0027] In Examples 1, 2 and 3, Ni:Co is 5:1-10:1; Cr:Mo is 2:1; in the process of making alloy powder, Mn, Zr and RE are added one by one in this order.

[0028] The corrosion-resistant nickel-based alloy surfacing powder of the invention is prepared by smelting in an induction heating furnace and a high-purity nitrogen atomization method. The powder morphology is silver-gray, and the spherical particle powder has good fluidity (14s / 50g) and high bulk density (4.6g / cm2). 3 ), the oxygen content is ≤500PPM, and the preferable particle size range is 212-20μm.

[0029] The comparison test results of Example 2 of the corrosion-resistant nickel-based alloy surfacing powder of the present invention and Hastelloy C276 and Inconel 625 alloys in the same ...

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Abstract

The invention provides a corrosion-resistant nickel-base alloy overlay welding powder which comprises the following components in percentage by weight: 20-28% of Cr, 10-14% of Mo, 6-8% of Co, 1-1.5% of Mn, 0.5-1% of Zr, 0.5-1% of Re, 2-2.5% of Si, 1.5-2% of B, at most 0.05% of impurity and the balance of Ni. Due to the adoption of the technical scheme, the strong corrosion resistance of the prepared nickel-base alloy overlay welding powder is much better than that of any existing other alloy powder in the patent at home and abroad; and the corrosion-resistant nickel-base alloy overlay welding powder is suitable for plasma arc overlay welding, has favorable laser cladding processibility, completely satisfies the requirement of corrosion resistance for sulfur-containing high oil gas well drilling tools, and greatly prolongs the service life of the drilling tool.

Description

technical field [0001] The invention belongs to the technical field of metal alloy powder for surface coating, in particular to a corrosion-resistant nickel-based alloy surfacing powder. Background technique [0002] In the existing environment of sulfide-containing oil and gas wells, the drilling tools are very prone to sulfide stress corrosion. With the increase of the concentration of NaCl in the drilling fluid and other acidic substances, the corrosion rate will be significantly accelerated, and the H 2 S, CO 2 The corrosion of drilling tools by , molten salt, etc. is mutually promoting. Corrosion-resistant nickel-based alloys have many patents in the world, such as Hastelloy C276, Inconel 625, etc., which are used in drilling tools for oil and gas wells with high sulfur content in my country, but the effect is still poor. In order to prolong the service life of the drilling tool, the anti-corrosion coating material on the surface of the drilling tool developed by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03B23K35/32
Inventor 钱铸
Owner TIANJIN ZHUJIN METAL SURFACE ENG MATERIALTECH DEV
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