Ultra-high-speed laser cladding powder for repairing damaged water injection combination valve, and repairing method

A technology of laser cladding and combined valve, applied in the direction of coating, metal material coating process, etc., can solve the problems of low production efficiency, poor bonding strength, etc., to achieve extended service life, smooth surface, good wear resistance and corrosion resistance performance effect

Inactive Publication Date: 2019-09-17
XIAN UNVERSITY OF ARTS & SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The second object of the present invention is to provide a method for repairing combined valves using laser cladding powder and ultra-high-speed laser cladding technology. Existing problems of poor bonding strength and low production efficiency

Method used

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  • Ultra-high-speed laser cladding powder for repairing damaged water injection combination valve, and repairing method
  • Ultra-high-speed laser cladding powder for repairing damaged water injection combination valve, and repairing method
  • Ultra-high-speed laser cladding powder for repairing damaged water injection combination valve, and repairing method

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Embodiment Construction

[0030] The present invention will be described in detail below in combination with specific embodiments.

[0031] A laser cladding powder of the present invention comprises 20.0-30.0 mass percent of WC reinforced particles, 9.0-13.0 mass percent of Cr, 7-9 mass percent of Fe, 1.0-2.0 mass percent of Si, 0.5- 0.7% by mass of C, 1.0-2.0% by mass of B, and the rest being Ni; the sum of the mass percentages of the above components is 100%.

[0032] Preferably, the particle size of the cladding powder is 25-50 μm.

[0033] Preferably, the sphericity of the cladding powder is >90%.

[0034] The method of using the above-mentioned laser cladding powder and ultra-high-speed laser cladding technology to repair the combined valve is implemented according to the following steps:

[0035] Step 1. Prepare cladding powder; vacuum seal for future use;

[0036] The specific process is as follows:

[0037] First, Ni55 alloy powder and WC powder are sieved through a powder sieve to remove l...

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Abstract

The invention discloses a laser cladding powder which is prepared from the components in percentage by mass: 20.0 to 30.0 percent of WC reinforced particles, 9.0 to 13.0 percent of Cr, 7 to 9 percent of Fe, 1.0 to 2.0 percent of Si, 0.5 to 0.7 percent of C, 1.0 to 2.0 percent of B, and the balance Ni, wherein the sum of the mass percent of the components is 100 percent. The method for repairing the combination valve by adopting the laser cladding powder and an ultra-high-speed laser cladding technology is concretely implemented according to the following steps of (1) preparing the cladding powder; and vacuum sealing for standby use; (2) carrying out preprocessing on the surface of an ineffective oilfield water injection combination valve; and (3) determining a laser cladding technique and technological parameters according to the geometric dimension of the surface of the ineffective oilfield water injection combination valve.

Description

technical field [0001] The invention belongs to the technical field of methods for repairing the failed surface of an oilfield water injection combined valve, in particular to a laser cladding powder, and also relates to a method for repairing the failed surface of an oilfield water injection pump combined valve using the powder and ultra-high-speed laser cladding technology. Background technique [0002] The oil wells in Changqing Oilfield have low formation pressure. During the oil production process, high-pressure water injection is usually used to drive the oil to flow out of the oil well. The water injection pressure is generally 15MPa-25MPa. In addition, there are two types of water injection and sewage injection in the water injection process. Among them, the sewage has high sulfide, hydride, chloride and bacteria, which will corrode the surface of the combined valve. Generally, the material used in petroleum equipment is medium carbon steel, which has poor wear resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00C22C19/05C22C32/00
CPCB22F1/0003C22C19/058C22C32/0052C23C24/103
Inventor 付福兴徐可为戴君刘明霞谢燕翔畅庚榕
Owner XIAN UNVERSITY OF ARTS & SCI
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