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Preparation method for inconel alloy based self-lubricating corrosion and wear resistant coating

A corrosion-resistant and wear-resistant nickel-chromium alloy technology, applied in metal material coating process, coating, fusion spraying, etc., can solve the problem of poor wear resistance and corrosion resistance, large coating pores, and restrictions on supersonic flame spraying metal Problems such as the application range of alloy coatings, to achieve the effect of expanding the application range and improving the surface hardness

Inactive Publication Date: 2012-04-25
ANHUI TIANYI HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal pores of the coating after thermal spraying are relatively large, the structure is not uniform enough, and the wear resistance and corrosion resistance are relatively poor.
Restricts the application range of supersonic flame spraying metal alloy coating engineering

Method used

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  • Preparation method for inconel alloy based self-lubricating corrosion and wear resistant coating
  • Preparation method for inconel alloy based self-lubricating corrosion and wear resistant coating
  • Preparation method for inconel alloy based self-lubricating corrosion and wear resistant coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the nickel-chromium alloy-based self-lubricating corrosion-resistant and wear-resistant coating in this embodiment includes the following steps: (1) Spraying Ni-based diamond-like alloy powder on the substrate by supersonic flame spraying to obtain an initial coating;

[0030] In the Ni-based diamond-like alloy powder, by mass percentage, Ni 50%, Cr 20%, W 11%, Mo 11%, Cu 5% and Al 3%, the particle size of the Ni-based diamond-like alloy powder is 30 μm.

[0031] Before supersonic flame spraying, the substrate was cleaned with acetone for 5 minutes, and then Al with a particle size of 50 mesh 2 o 3 sandblasting;

[0032] In this embodiment, JK3000 type supersonic flame spraying is selected, and the main combustion gas O 2 The flow rate is 34SCCM, SCCM is standard cubic meters per minute, auxiliary combustion gas H 2 The flow rate is 57SCCM. The main combustion gas and auxiliary combustion gas are mixed with Ni-based diamond-like alloy powder...

Embodiment 2

[0049] In this example, the Ni-based diamond-like alloy powder contains 40% Ni, 30% Cr, 15% W, 8% Mo, 4% Cu and 3% Al by mass percentage, and the particle size of the powder is 45 μm.

[0050] In this embodiment, JK3000 type supersonic flame spraying is selected, and the main combustion gas O 2 The flow rate is 20SCCM, the auxiliary combustion gas H 2 The flow rate is 70SCCM. The main combustion gas and auxiliary combustion gas are mixed with Ni-based diamond-like alloy powder in the combustion chamber and sprayed onto the surface of the substrate. The injection distance is 10inch, the powder feeding rate is 50g / min, the combustion chamber pressure is 5bar, and the deposition rate It is 3 μm / min, and the initial coating thickness after spraying is 250 μm.

[0051] Laser beam scanning uses CO with a power of 4kW, a circular spot diameter of 4mm, and a scanning speed of 300mm / min. 2 continuous wave laser beam. The overlapping rate of two adjacent laser beams is 10%.

[0052]...

Embodiment 3

[0054] In this embodiment, the Ni-based diamond-like alloy powder contains 55% Ni, 15% Cr, 10% W, 9% Mo, 9% Cu and 2% Al by mass percentage, and the particle size of the powder is 15 μm.

[0055] In this embodiment, JK3000 type supersonic flame spraying is selected, and the main combustion gas O 2 The flow rate is 50SCCM, the auxiliary combustion gas H 2 The flow rate is 40SCCM, the main combustion gas and auxiliary combustion gas are mixed with Ni-based diamond-like alloy powder in the combustion chamber and sprayed onto the surface of the substrate, the injection distance is 5 inches, the powder feeding rate is 30g / min, the combustion chamber pressure is 10bar, and the deposition rate It is 7 μm / min, and the initial coating thickness after spraying is 350 μm.

[0056] Laser beam scanning uses a laser beam with a power of 4kW and an elliptical spot size of 5mm×4mm to move along the direction of the long diameter (5mm) at a scanning speed of V=600mm / min, and the overlapping r...

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Abstract

The invention discloses a preparation method for an inconel alloy based self-lubricating corrosion and wear resistant coating. The method comprises the steps of: spraying Ni-based diamond alloy powder on a matrix so as to obtain a primary coating; scanning the primary coating with a laser beam so as to obtain a final coating. In the invention, through laser scanning treatment, a dense antifriction lubricating oxide film is formed on the coating surface of an inconel alloy workpiece, and the coating is dense and is closely combined with the matrix interface. The method of the invention meets the service demand of the coating in a high wearing and corrosive medium, and the laser scanning treatment also greatly improves its surface hardness. The method of the invention broadens the engineering application scope of thermal spraying coatings, and provides a new method for developing cogeneric high-end products.

Description

technical field [0001] The invention relates to a method for preparing a coating on the surface of a workpiece, in particular to a method for preparing a nickel-chromium alloy-based self-lubricating corrosion-resistant and wear-resistant coating. Background technique [0002] Nickel-chromium (Inconel) alloy is a precipitation hardening alloy, which has high creep rupture strength at high temperatures above 700 °C, and is used in gas turbines, rocket engines, spacecraft, pumps and tools. This alloy was chosen as the base material due to its stable thermal properties (such as heat distortion) and high hardness at moderate temperatures during the HVOF process. [0003] Thermal spray protective coatings are widely used industrially in petrochemical plants, roll paper processing, packaging machine components, pump parts (impellers, seals, valve bodies, sliding bearings), hydraulic machinery (pistons, rods), coastal and offshore facilities etc. Coatings are required in many indu...

Claims

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Application Information

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IPC IPC(8): C23C4/08C23C4/18C22C19/05C23C4/129
Inventor 张世宏邰召勤
Owner ANHUI TIANYI HEAVY IND
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