Purpose

The effect of cryogenic heat treatment on the mechanical properties of different materials has been frequently investigated by researchers in recent years. The purpose of this paper is to investigate wear behaviour of monolayer, multilayer and nanocomposite coatings after cryogenic heat treatment. It is a first in its field in terms of both the heat treatment used and the coatings examined.

Design/methodology/approach

The aCN/TiAlN, TiAlN and ncTiAlSiN hard coatings deposited on the AISI D2 steel substrate were subjected to cryogenic heat treatment at −145^oC and −196^oC for 24 h and then tempered at 200^oC for 2 h. Then, the samples were subjected to wear tests of 5, 10 and 15 N three different load values. The wear mechanisms occurring on the wear surfaces were determined by scanning electron microscope supported by EDS.

Findings

Oxidation, fatigue and delamination wear mechanisms were realized on the surfaces of the samples subjected to dry sliding wear test. The wear resistance of S1 increased with cryogenic heat treatment. According to the wear test results of the untreated samples, it was found that the samples with lower hardness than the others had higher wear resistance. The wear resistance of S1 and S2 samples was increased by cryogenic heat treatment. The best wear resistance in all parameters was obtained by S1. Oxidation in the S1 was found to have a positive effect on wear resistance. According to EDS results after wear of S2, chromium-rich layer was found on the surface of the material. It is understood that cryogenic heat treatment causes carbide precipitation in the inner structure of the substrate material.

Originality/value

The effect of cryogenic heat treatment on the mechanical properties of different materials has been frequently investigated by researchers in recent years. In this study, wear behaviour of monolayer, multilayer and nanocomposite coatings after cryogenic heat treatment was investigated. It is a first in its field in terms of both the heat treatment used and the coatings examined.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2020-0111/

中文翻译：

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低温处理对硬质涂层干滑动磨损机理的影响

目的

近年来，研究人员经常研究低温热处理对不同材料的机械性能的影响。本文的目的是研究低温热处理后的单层，多层和纳米复合涂层的磨损行为。就所用的热处理和所检查的涂层而言，这是该领域中的首创。

设计/方法/方法

将沉积在AISI D2钢基材上的aCN / TiAlN，TiAlN和ncTiAlSiN硬质涂层在-145 ^o C和-196 ^o C下进行低温热处理24 h，然后在200 ^o C下回火2 h。然后，对样品进行5、10和15 N三种不同载荷值的磨损测试。通过EDS支持的扫描电子显微镜确定在磨损表面上发生的磨损机理。

发现

在经受干滑动磨损测试的样品表面上实现了氧化，疲劳和分层磨损机理。S1的耐磨性随低温热处理而增加。根据未处理样品的磨损测试结果，发现硬度比其他样品低的样品具有较高的耐磨性。S1和S2样品的耐磨性通过低温热处理得以提高。通过S1获得所有参数中的最佳耐磨性。发现S1中的氧化对耐磨性有积极影响。根据S2磨损后的EDS结果，在材料表面发现了富铬层。可以理解的是，低温热处理会在基材的内部结构中引起碳化物沉淀。

创意/价值

近年来，研究人员经常研究低温热处理对不同材料的机械性能的影响。在这项研究中，研究了低温热处理后单层，多层和纳米复合涂层的磨损行为。就所用的热处理和所检查的涂层而言，这是该领域中的首创。

同行评审

本文的同行评审历史记录可在以下网址获得：https://publons.com/publon/10.1108/ILT-03-2020-0111/