具有不同预处理的AISI H11上沉积的TiAlN和CrAlN涂层的摩擦力学行为,Coatings

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具有不同预处理的AISI H11上沉积的TiAlN和CrAlN涂层的摩擦力学行为
Coatings ( IF 3.4 ) Pub Date : 2019-08-15 , DOI: 10.3390/coatings9080519
Wolfgang Tillmann , Diego Grisales , Dominic Stangier , Timo Butzke

在金属加工行业中，不同的过程和应用需要使用定制设计的工具。通常，选择合适的基材材料及其预处理以及保护性涂层对于成型工具，冲模，冲头和涂层零件的性能和使用寿命至关重要。TiAlN和CrAlN涂层已通过直流磁控溅射沉积在热作工具钢AISI H11上。在沉积之前，通过执行三种不同的预处理对钢基底进行修改：退火基底的氮化[Nitr。]，钢的热处理（淬火和双回火）[HT]以及加热后的氮化底物的处理[HT +硝基]。这项研究的目的是获得两种最有希望的三元过渡金属氮化物涂层TiAlN和CrAlN的微结构性能和摩擦力学性能的有价值的信息，这些涂层沉积在具有不同初始性能的AISI H11钢上。在沉积之前对钢进行的不同预处理有利于在针对特定应用的工具的设计和构造过程中进行定制。TiAlN涂层的微观结构，附着力和耐磨性受基材制备的影响很大。相反，CrAlN的结果与底物的制备更无关，并且没有发现高的影响。例如，对于沉积到HT + Nitr上的涂层，TiAlN涂层的附着力从17到43 N不等。基板和HT基板对于HT和HT + Nitr，CrAlN涂层的最低和最高附着力在42和53 N之间变化。分别。同样，CrAlN的磨损系数比TiAlN涂层的磨损系数小十倍，这可能是由于存在六方AlN相以及基体和CrAlN涂层的杨氏模量之间的差异很小。

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Tribomechanical Behaviour of TiAlN and CrAlN Coatings Deposited onto AISI H11 with Different Pre-Treatments

In the metalworking industry, different processes and applications require the utilisation of custom designed tools. The selection of the appropriated substrate material and its pre-treatment as well as the protective coating are of great importance in the performance and life time of forming tools, dies, punches and coated parts in general. TiAlN and CrAlN coatings have been deposited onto the hot work tool steel AISI H11 by means of Direct Current Magnetron Sputtering. Prior to the deposition, the steel substrate was modified by the implementation of three different pre-treatments: nitriding of the annealed substrate [Nitr.], heat treatment of the steel (quenching and double tempering) [HT] and nitridation subsequent to a heat treatment of the substrate [HT + Nitr.]. The purpose of this research is to obtain valuable information on the microstructural properties and tribomechanical behaviour of two of the most promising ternary transition metal nitride coatings, TiAlN and CrAlN, when deposited on the AISI H11 steel with different initial properties. The different pre-treatments performed to the steel prior to the deposition favour the tailoring during the design and construction of tools for specific applications. The microstructure, the adhesion and the wear resistance of TiAlN coatings were highly influenced by the substrate preparation. Contrarily, CrAlN results were more independent of the substrate preparation and no high influences were found. For instance, the adhesion of the TiAlN coating varied from 17 to 43 N for the coating deposited onto the HT + Nitr. substrate and the HT substrate respectively, while the lowest and highest adhesion of the CrAlN coating varied between 42 and 53 N for the HT and the HT + Nitr. respectively. Likewise, the wear coefficient of the CrAlN were ten times smaller than those found for the TiAlN coatings, presumably due to the presence of hex-AlN phases and the small differences on the Young´s Modulus of the substrate and the CrAlN coatings.

更新日期：2019-08-15

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