Titanium alloy high-emperature oxidation-resistant fretting-wear-resistant coating material, coating and preparation method of coating

A technology of high temperature oxidation resistance and fretting wear resistance, applied in metal material coating process, coating, fusion spraying and other directions, can solve the problems of micro-cracks, exceeding, affecting the service life of blades, engine safety, etc.

Active Publication Date: 2015-02-18
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of metal-ceramic composition has several technical benefits: it solves issues with existing coatings used for Titanum alloys due to their lower temperatures at which they tend to wear out faster than other metals like iron; this results in improved durability over time without requiring frequent maintenance.

Problems solved by technology

This patented technical problem addressed during this patents describes how damage can occur when exposed metal surfaces come into direct contact due to high temperatures caused by these factors like airflow over rotors (rotations) that rotate at speeds between 70-1080 rpm). These types of impact cause cracks and failures in the materials commonly found inside engines' coolant system components called tunnels.

Method used

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  • Titanium alloy high-emperature oxidation-resistant fretting-wear-resistant coating material, coating and preparation method of coating
  • Titanium alloy high-emperature oxidation-resistant fretting-wear-resistant coating material, coating and preparation method of coating

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Embodiment Construction

[0018] Process route of the present invention is as shown in accompanying drawing. Weigh and mix h-BN, MCrAlYX and binder, then thermal spray, and pass the inspection to obtain the product.

[0019] The h-BN powder is a commercially available product, and the MCrAlYX powder is prepared by a known method (such as mechanical mixing or atomization).

[0020] Preparation of MCrAlYX / BN Coating

[0021] Add 0-5% binder to h-BN and MCrAlYX, mix thoroughly and uniformly, prepare coating by thermal spraying method, obtain high temperature oxidation resistant anti-fretting wear coating after passing the test. The supersonic flame spraying process is: the oxygen flow rate is 20-30L / min, the kerosene is 800-950L / h, the spraying distance is 300-400mm, and the powder feeding amount is 60-150g / min; the atmospheric plasma spraying process parameters are: power 25-40kw , spray distance 110-150mm, powder feeding rate 30-60g / min, main air flow 45-70L / min.

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Abstract

The invention discloses a titanium alloy high-temperature oxidation-resistant fretting-wear-resistant coating material, a coating and a preparation method of the coating. The titanium alloy high-temperature oxidation-resistant fretting-wear-resistant coating material contains hexagonal boron nitride (h-BN), MCrAlYX alloy powder and a binding agent and is composed of 5-30% of hexagonal boron nitride, 0-5% of a binding agent and the balance of MCrAlYX, wherein M is Co, Ni, Fe or alloy thereof, and X is one or combination of more than one of alloy elements such as Ti, Hf, Ta, Nb, Re, Ti and Si. In the preparation method of the coating, high velocity oxy fuel spraying or atmospheric plasma spraying is adopted. The highest use temperature of the coating can reach 1100 DEG C, and the coating can be applied to protection for tenon-mortise structure connecting parts of titanium alloy and high-temperature alloy parts of a fan, a compressor blade, a turbine blade and the like of an aircraft engine, a ground combustion gas turbine and the like.

Description

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Claims

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Application Information

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Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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