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An iron-based amorphous powder for wear-resistant and corrosion-resistant coatings and its preparation method

An iron-based amorphous and powder technology, applied in the coating, metal material coating process, etc., can solve the problems of large interface dilution rate of argon arc surfacing coating, low bonding strength, thermal deformation of the base material, etc., and achieve high Wear-resistant and corrosion-resistant characteristics, low preparation cost, long wear-resistant and corrosion-resistant life

Inactive Publication Date: 2015-12-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional Fe-based coating preparation research mainly adopts methods such as thermal spraying and argon arc surfacing. The coatings prepared by thermal spraying technologies such as supersonic flame spraying and arc spraying are thin in thickness and high in internal porosity. It is mechanically bonded, and the bonding strength is low; when the coating is thick, it will crack and separate from the substrate, and the coating will fall off easily under high temperature erosion and alternating thermal stress, which still cannot meet the protection requirements of wear resistance and corrosion resistance under harsh working conditions. Requirements: The interface dilution rate of the argon arc surfacing coating is relatively large, and the thermal deformation of the base material is serious

Method used

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  • An iron-based amorphous powder for wear-resistant and corrosion-resistant coatings and its preparation method
  • An iron-based amorphous powder for wear-resistant and corrosion-resistant coatings and its preparation method
  • An iron-based amorphous powder for wear-resistant and corrosion-resistant coatings and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation of wear-resistant and corrosion-resistant cladding layer on the surface of oil drill pipe

[0030] 1. Preparation of mixed powder

[0031] 1. Preparation of powder raw materials

[0032] The weight percent composition of the iron-based amorphous powder is represented by the following general formula:

[0033] Fe a Cr b Ni c Si d B e Mn f C g Mo h Nb i Cu j Co k Re l (The subscript is weight percentage), wherein Re represents rare earth element Ce or Y, and the weight percentage range of the powder raw material is as follows, wherein b: 30wt.%, c: 10wt.%, d: 3.5wt.%, e: 8wt.%, f: 3wt.%, g: 3wt.%, h: 8wt.%, i: 1wt.%, Re is Ce, content l is 0.5wt.%, iron powder content a is the balance.

[0034] The mesh number of each raw material is 100-400. In order to reduce the melting point, cost and volatility, etc., some raw materials are selected as intermediate alloy powder.

[0035] 2. Preparation process of mixed powder

[0036] (1) accord...

Embodiment 2

[0046] Example 2: Preparation of iron-based amorphous cladding layer on the outer surface of the economizer tube

[0047] 1. Preparation of mixed powder

[0048] 1. Preparation of powder raw materials

[0049] The weight percent composition of the iron-based amorphous powder is represented by the following general formula:

[0050] Fe a Cr b Ni c Si d B e Mn f C g Mo h Nb i Cu j Co k Re l (the subscript is weight percent), wherein Re represents rare earth element Ce or Y, and the weight percent range of the powder raw material is as follows, wherein b: 20wt.%, c: 12wt.%, d: 2.5wt.%, e: 7wt.%, f: 2wt.%, h: 10wt.%, j: 1wt.%, k: 5wt.%, Re is Y, content l is 1wt.%, iron powder content a is the balance.

[0051] The mesh number of each raw material is 100-400. In order to reduce the melting point, cost and volatility, etc., some raw materials are selected as intermediate alloy powder.

[0052] 2. Preparation process of mixed powder

[0053] (1) according to the vari...

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Abstract

The invention discloses iron-based amorphous powder for wear-resisting and corrosion-resisting coating and a preparation method thereof, and belongs to the technical field of surface engineering. Iron-based amorphous alloy coating adopts iron as a main component, and also comprises amorphous phase (in at least 30 percent by volume), and the representation formula of all elements in percentage by weight is FeaCrbNicSidBeMnfCgMohNbiCujCokRel. The powder is prepared through direct ball-milling mixing in proportion of all components according to the required weight ratio. The powder can be used for not only laser cladding but also thermal spraying technology, mixed powder is melt by high-energy density laser beams, an iron-based amorphous or amorphous composite cladding layer is formed on the outer surface of a matrix, the cladding layer has the characteristics of higher wear and collision resistance, the dilution rate is low, the wear-resisting and collision-resisting service lives of a petroleum drill rod, an air compressor screw rod, a roller, a water-cooled wall pipe and an economizer pipe are remarkably prolonged, the process is simpler, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and particularly relates to an iron-based amorphous powder used for wear-resistant and corrosion-resistant coatings and a preparation method thereof. Specifically, it provides an iron-based amorphous powder material for laser cladding and a method for preparing a wear-resistant and corrosion-resistant coating for thermal power, oil drilling, marine, steel and nuclear power wear-resistant and corrosion-resistant surface treatment. Background technique [0002] The erosion and corrosion phenomenon of economizer pipes below 250 degrees in flue gas, soot and sulfuric acid vapor is very serious. When the temperature of the metal wall on the heating surface of the boiler tail is lower than the condensation point of sulfuric acid vapor, sulfuric acid droplets will adhere to its surface, causing severe acid dew point corrosion. It is so serious that the exhaust gas temperature is increased o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04C23C24/10
Inventor 王永田薛志勇宝志坚徐钢古凌云汪洋蒋润森
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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