VN (Vanadium Nitride) wear-resisting coating with low abrasion rate and preparation method thereof

Abstract

The invention provides a VN (Vanadium Nitride) wear-resisting coating with a low abrasion rate and a preparation method thereof. The VN wear-resisting coating has height (200) preferred orientation and a V-shaped columnar crystal growth structure; the density of the coating is high and is 5.0g / cm<3>-6.0g / cm<3>; the VN wear-resisting coating with the structure has the characteristics of high rigidity (more than 25Gpa), low abrasion rate (less than 10<-16>m<3> / N*m (order of magnitudes)), low friction coefficient (less than 0.5) and the like, and is suitable for increasing the wear resistance of a workpiece surface in middle temperature (less than 500 DEG C), high pressure, high speed and heavy load stations. The invention further discloses the preparation method of the VN wear-resisting coating.

Description

technical field [0001] The invention belongs to the field of ceramic coating materials, in particular, the invention relates to a VN wear-resistant coating with low wear rate and a preparation method thereof. Background technique [0002] With the development of modern industrial technology, the requirements for the surface properties of various mechanical parts are getting higher and higher. Especially the components working under the conditions of medium temperature, high pressure, high speed and heavy load are often scrapped due to surface wear, which eventually leads to the shutdown or destruction of the entire equipment. At present, there are two commonly used methods to improve the wear resistance of mechanical parts and prolong their service life: one method is to realize the original surface modification through surface hardening, ion implantation, diffusion alloying, etc.; Process methods such as spraying, electroplating, chemical plating and vapor deposition form ...

AI Technical Summary

Problems solved by technology

{"Single layer and multilayer wear resistant coatings of (Ti,Al)N: a review" PalDey et al, "Materials Science and Engineering A", 58-79 (2003) 342}, but the coating preparation process is relatively complicated

Chinese patent CN102555332A discloses a friction-reducing and wear-resistant coating consisting of a surface layer and a bottom layer. The surface layer is a-C:H, and the bottom layer is Cr+W-C:H or Cr+CrN. Not suitable for high temperature (>350°C) friction conditions

2. Use a polymer binder with strong toughness to wrap ceramic particles to prepare wear-resistant coatings. For example, Chinese patent CN1766015A publicly reported that fluoropolymers wrapped ceramic particles such as carbides and nitrides to prepare scratch-resistant, wear-resistant coatings. Grinding coating, but the coating fails due to polymer decomposition under high temperature conditions

3. Introduce self-lubricating materials to reduce the friction coefficient of wear-resistant coatings, such as MoS 2 , graphite, BN, WC / C composite materials, etc., but the wear rate can only be reduced to 10 after optimizing the process -16 m 3 / N m order of magnitude {"Vanadium containing self-adaptive low-friction hard coatings for high temperature applications: a review" Franz et al, "Surface and Coatings Technology", 1-13(2013) 228}

These coatings have complex preparation processes, high equipment requirements, poor repeatability, and harsh conditions, which limit their application in some aspects.

[0005] To sum up, there is still a lack of a wear-resistant material with simple preparation process, high wear resistance, low wear rate and relatively high hardness in this field.

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