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Wear-resistant anti-corrosion electric arc spraying cored wire for protecting surface of copper matrix

A powder core wire, arc spraying technology, applied in coating, fusion spraying, metal material coating technology and other directions, can solve the problems of low bonding strength, decreased thermal conductivity of tuyere, poor bonding between reinforcement layer and substrate, etc. Antioxidant properties are improved, bonding strength is improved, and bonding strength is high

Active Publication Date: 2012-07-11
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a wear-resistant and corrosion-resistant electric arc spraying powder core wire material for copper substrate surface protection and a preparation method, which mainly solves the problem of low bonding strength and easy peeling off of the coating in existing spraying to improve the service life of the tuyere small sleeve. The mechanical shock resistance is poor, and the thermal conductivity of the tuyere gradually decreases during use, and the temperature of the tuyere wall continues to rise, which is prone to technical problems of melting loss
The invention improves the surface hardness, high temperature resistance, corrosion resistance and wear resistance of the tuyere small sleeve, and at the same time solves the problem of poor bonding between the strengthening layer and the substrate and reduces the thermal conductivity of the copper substrate

Method used

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  • Wear-resistant anti-corrosion electric arc spraying cored wire for protecting surface of copper matrix

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Experimental program
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Effect test

Embodiment 1

[0017] The outer cladding is made of a copper-aluminum alloy strip with a width of 10mm and a thickness of 0.2mm (the mass percentage of aluminum is 2%) to make a powder core wire material of Ф2mm, and the filling rate of the powder core is 32%. The mass percentages of the medicinal powder components of the core silk material are as follows: metal chromium: 1%; metal zirconium: 0.5%; metal silver: 0.1%; metal copper: 98.4%.

[0018] The powder core wire made according to the above specifications is arc sprayed on the pure copper substrate, and then the sprayed coating formed by heat treatment has a HV hardness of 215, a softening temperature of 805°C, a bonding strength of 60MPa, and a thermal conductivity of 86% of pure copper.

Embodiment 2

[0020] The outer cladding is made of a copper-aluminum alloy strip with a width of 10mm and a thickness of 0.2mm (the mass percentage of aluminum is 2.5%) to make a powder core wire material of Ф2mm, and the filling rate of the powder core is 34%. The mass percentages of the medicinal powder components of the core silk material are as follows: metal chromium: 1.2%; metal zirconium: 0.8%; metal silver: 0.3%; metal copper: 97.7%.

[0021] The powder core wire made according to the above specifications is arc sprayed on the pure copper substrate, and then the spray coating formed by heat treatment has a HV hardness of 229, a softening temperature of 806°C, a bonding strength of 57MPa, and a thermal conductivity of 84% of pure copper.

Embodiment 3

[0023] The outer cladding is made of a copper-aluminum alloy strip with a width of 10mm and a thickness of 0.2mm (the mass percentage of aluminum is 3%) to make a powder core wire material of Ф2mm, and the filling rate of the powder core is 35%. The mass percentages of the ingredients of the powder core wire medicinal powder are as follows: metal chromium: 1.5%; metal zirconium: 1%; metal silver: 0.5%; metal copper: 97%.

[0024] The powder core wire made according to the above specifications is arc sprayed on the pure copper substrate, and then the sprayed coating formed by heat treatment has a HV hardness of 243, a softening temperature of 810°C, a bonding strength of 54MPa, and a thermal conductivity of 82% of pure copper.

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Abstract

The invention relates to a wear-resistant anti-corrosion electric arc spraying cored wire for protecting the surface of a copper matrix and a preparation method and mainly solves the technical problems that in the existing spraying method for prolonging the service life of a tuyere small sleeve, the combination strength is low, a coating is easy to fall off, the mechanical impact resistance is poor and in the using process of the tuyere small sleeve, the heat conduction capacity of a tuyere is gradually reduced, the temperature of the tuyere wall is gradually risen and the melting loss is easy to generate. The invention adopts the technical scheme that the wear-resistant anti-corrosion electric arc spraying cored wire for protecting the surface of the copper matrix is characterized in that a sheath of the cored wire is a copper aluminium alloy belt, wherein the content of aluminium is 2 to 4 percent of mass of the alloy belt; and powder of the cored wire comprises the following ingredients in percentage by mass: 1 to 2 percent of metal chromium, 0.5 to 2 percent of metal zirconium, 0.1 to 1 percent of metal silver and the balance metal copper. The wear-resistant anti-corrosion electric arc spraying cored wire for protecting the surface of the copper matrix is mainly used for the erosion wear resistance of the surface of the tuyere small sleeve of a blast furnace and is low in cost.

Description

technical field [0001] The invention relates to a wear-resistant and corrosion-resistant electric arc spraying powder core wire material for copper substrate surface protection and a preparation method thereof, which is mainly used for ablation and wear resistance on the surface of a small tuyere sleeve of a blast furnace, and has low cost. Background technique [0002] Since the emergence of modern blast furnace ironmaking in the 19th century, the tuyere sleeve has been a key component necessary for blast furnace production. The length of its service life directly affects the safety, low consumption, smooth flow and high efficiency of blast furnace production. For large and medium-sized blast furnaces, each blast furnace has 14 to 40 tuyeres, and its average service life is 2 to 3 months. There are multiple tuyeres on a blast furnace, and a blast furnace replaces tuyeres 6 to 9 times a month on average. There are hundreds of blast furnaces in our country. Due to the freque...

Claims

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Application Information

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IPC IPC(8): C23C4/08C23C4/131
Inventor 宣守蓉韩宏松姚无病金明蔡刚田炜郭志猛罗骥杨薇薇
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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