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Self-fluxing nickel base alloy powder for repairing valve seats and welding technology thereof

A nickel-based self-melting and welding process technology, applied in the field of remanufacturing, can solve problems such as waste of resources, achieve the effects of prolonging service life, excellent wear resistance, and improving surface properties

Active Publication Date: 2017-11-10
安徽鼎恒再制造产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the daily use of the valve seat, a certain degree of wear and corrosion will occur over time. When the above situation is serious, it needs to be replaced in time to prevent the impact on the entire circuit. However, the replaced valve seat Due to the lack of appropriate recycling methods, a large amount of resources are wasted after being discarded. Therefore, there is an urgent need for a method for recycling and remanufacturing the valve seat.

Method used

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  • Self-fluxing nickel base alloy powder for repairing valve seats and welding technology thereof
  • Self-fluxing nickel base alloy powder for repairing valve seats and welding technology thereof
  • Self-fluxing nickel base alloy powder for repairing valve seats and welding technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Nickel-based self-fluxing alloy powder for valve seat repair, including the following components in mass percentage:

[0015]

[0016] The titanium carbide powder includes the following components in mass percentage: Fe is 0.05%, C is 25%, and Ti is the balance.

[0017] The ferrochromium nitride powder includes the following components in mass percentage: 62% of Cr, 7% of N, 0.03% of C, 1% of Si, 0.05% of P, 0.02% of S, and the balance of Fe.

[0018] The rare earth ferrosilicon alloy includes the following components in mass percentage: Y is 18%, LaCe is 16%, Si is 17%, and Fe is the balance.

[0019] A welding process of nickel-based self-fluxing alloy powder for valve seat repair, the process steps are: spray welding nickel-based self-fluxing alloy powder on the surface of a workpiece to form a welding layer by using an oxygen-acetylene one-step spray welding process.

[0020] If the nickel-based self-fluxing alloy powder has moisture absorption, or the storage ...

Embodiment 2

[0023] Nickel-based self-fluxing alloy powder for valve seat repair, including the following components in mass percentage:

[0024]

[0025] The titanium carbide powder includes the following components in mass percentage: Fe is 0.1%, C is 19%, and Ti is the balance.

[0026] The ferrochromium nitride powder includes the following components in mass percentage: 58% of Cr, 3% of N, 0.2% of C, 3% of Si, 0.01% of P, 0.05% of S, and the balance of Fe.

[0027] The rare earth ferrosilicon alloy includes the following components in mass percentage: Y is 23%, LaCe is 10%, Si is 13%, and Fe is the balance.

[0028] The welding process of nickel-based self-fluxing alloy powder for valve seat repair, the process steps are the same as in Example 1.

Embodiment 3

[0030] Nickel-based self-fluxing alloy powder for valve seat repair, including the following components in mass percentage:

[0031]

[0032] The titanium carbide powder includes the following components in mass percentage: Fe is 0.08%, C is 23%, and Ti is the balance.

[0033] The ferrochromium nitride powder includes the following components in mass percentage: 60% of Cr, 4% of N, 0.1% of C, 2% of Si, 0.03% of P, 0.03% of S, and the balance of Fe.

[0034] The rare earth ferrosilicon alloy includes the following components in mass percentage: Y is 21%, LaCe is 14%, Si is 15%, and Fe is the balance.

[0035] A welding process of nickel-based self-fluxing alloy powder for valve seat repair, the process steps are: spray welding nickel-based self-fluxing alloy powder on the surface of a workpiece to form a welding layer by using an oxygen-acetylene two-step spray welding process.

[0036] If the nickel-based self-fluxing alloy powder has moisture absorption, or the storage p...

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Abstract

The invention relates to a self-fluxing nickel base alloy powder for repairing a valve seat and awelding technology of self-fluxing nickel base alloy powder for repairing the valve seat. The self-fluxing nickel base alloy powder for repairing valve seat is prepared from, by mass, 2-3% of titanium carbide powder, 0.5-1% of activated carbon powder; 5-6% of nitrogen containing ferrochromium powder, 2-3% of water mist iron powder, 6-7% of rare earth ferrosilicon alloy and the balance nickel powder. The self-fluxing nickel base alloy powder has low melting point and good self-fluxing nature. Therefore, the self-fluxing nickel base alloy powder is suitable for spray welding hard face alloy. The spray welding layer has good abrasive resisting property, good corrosion resisting property, good heat resisting property and good oxidation resisting property. A welding layer is formed on the surface of a workpiece by an oxygen-acetylene one-step or two-step method for spray welding. Apart from achieving the restoring of the size of a valve seat, the surface properties of the valve seat are also further improved. Therefore, the service life of the valve seat is extended.

Description

technical field [0001] The invention relates to the technical field of remanufacturing, in particular to nickel-based self-fluxing alloy powder for valve seat repair and its welding process. Background technique [0002] The valve seat is a detachable surface part in the valve, which is used to support the fully closed position of the valve core and constitute a sealing pair. Generally, the seat diameter is the maximum flow diameter of the valve. In the daily use of the valve seat, a certain degree of wear and corrosion will occur over time. When the above situation is serious, it needs to be replaced in time to prevent the impact on the entire circuit. However, the replaced valve seat A large amount of resources are wasted after being discarded due to failure to adopt a suitable recycling method. Therefore, there is an urgent need for a method for recycling and remanufacturing the valve seat. Contents of the invention [0003] In order to solve the deficiencies in the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K5/18B23K10/02B23K35/30B23P6/00
CPCB23K5/18B23K10/027B23K35/3033B23P6/00
Inventor 程敬卿薛卫昌周乾坤
Owner 安徽鼎恒再制造产业技术研究院有限公司
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