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Abrasive-wear-resistant rare-earth-containing Ni-Cr-Fe alloy powder material and application thereof

A powder material and ferroalloy technology, which is applied in the field of rare earth-containing nickel-chromium-iron alloy powder materials, can solve the problems of high nickel content of precious metals, easy peeling of hard phases, and aggravated wear, so as to achieve uniform distribution, improve comprehensive performance, and reduce alloy cost effect

Inactive Publication Date: 2016-11-09
LANZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rare earth-containing nickel-chromium-iron alloy powder material and its application for wear-resistant grain wear, aiming to solve the problem of high nickel content and high cost of the existing nickel-based alloy precious metal, and the high cost of Ni-based alloys. The hard phase of the coating structure is easy to peel off during the abrasive wear process, causing the problem of aggravated wear

Method used

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  • Abrasive-wear-resistant rare-earth-containing Ni-Cr-Fe alloy powder material and application thereof

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preparation example Construction

[0024] The application of the rare earth-containing nickel-chromium-iron alloy powder material used for wear-resistant grain wear in the embodiment of the present invention is the preparation of wear-resistant coating; as figure 1 As shown, the preparation method of the wear-resistant coating of the embodiment of the present invention comprises the following steps:

[0025] S101: Substrate surface pretreatment, use a steel wire brush dipped in acetone or gasoline to clean the surface of the substrate, remove oil and rust spots, and make the surface clean and free of dirt; sandblast and roughen the surface of the substrate 45# steel;

[0026] S102: Add a small amount of organic binder, mix the alloy powder evenly, coat it on the workpiece substrate, and then dry it (heating in a muffle furnace, natural air drying or infrared heating) to form an alloy powder with a certain strength thin shell;

[0027] S103: Then use the SPH-F2000 type oxygen-acetylene flame spraying torch to c...

Embodiment 1

[0030] In the embodiment of the present invention, ingredients are first prepared according to the determined chemical composition of the alloy, and the prepared materials are melted into molten metal in an induction furnace, and necessary refining treatment is carried out to obtain qualified molten metal. The alloy powder is prepared by an atomization method, and the powder is subjected to precipitation, drying, powder sieving, and inspection procedures to obtain qualified powder materials.

[0031] The SPH-F2000 oxygen-acetylene flame spraying torch produced by Shanghai Spraying Machinery Factory is used. The alloy powder is evenly coated on the end face of the 45# steel sample after cleaning, degreasing and sandblasting (20-40 mesh corundum sand) by the spray melting method. The thickness of the spray melting layer is 0.8~1.2mm. The interface with 45# steel is a metallurgical bond.

[0032] The technological process of spray melting mainly includes: base material surface p...

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Abstract

The invention discloses an abrasive-wear-resistant rare-earth-containing Ni-Cr-Fe alloy powder material and application thereof. The abrasive-wear-resistant rare-earth-containing Ni-Cr-Fe alloy powder material comprises the following components in percentage by weight: 2.0%-3.0% of C, 3.0%-4.0% of B, 2.5%-3.5% of Si, 18%-20% of Ni, 16%-18% of Cr, 0.3%-0.5% of Ce and Fe in balancing amount. Rear earth is added into the powder material, so that the performance of the powder material is improved, and the content of a precious metal in powder material is reduced to lower the cost of the powder material; owing to the addition of rear earth, the hard phase in a coating structure is distributed uniformly, the binding force between the coating structure and a matrix is enhanced, the coating structure is hindered from stripping during an abrasive wear process, and the abrasive-wear resistance of the coating structure is improved; and problems about surface protection and workpiece repair of large-scale equipment and key parts are solved, the cost is saved, and economic benefits are created.

Description

technical field [0001] The invention belongs to the technical field of nickel-chromium-iron alloy powder, and in particular relates to a rare-earth-containing nickel-chromium-iron alloy powder material for abrasive wear resistance and an application thereof. Background technique [0002] At present, Ni-based, Co-based and Fe-based self-fluxing alloy coatings are widely used in material surface protection and workpiece repair, especially in the maintenance of large imported equipment and the replacement of key components, such as mud pumps for oil drilling equipment It has obvious economic and social benefits such as the cylinder liner of the hydraulic power plant, the runner of the water turbine in the hydropower plant, the liner of the coal mill in the thermal power plant, the main shaft of the large-scale pump, and the wear-resistant parts of various screw conveying devices and propellers in the machinery industry. Ni-based self-fluxing alloys have excellent wear resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C23C4/129C22C38/54C22C38/56
CPCB22F1/0003C22C38/005C22C38/54C22C38/56
Inventor 张振宇梁补女
Owner LANZHOU INST OF TECH
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