CHROMIUM-BASED OXIDATION-RESISTANT COATINGS FOR THE PROTECTION OF ENGINE VALVES IN AUTOMOTIVE VEHICLES

被引：13
|
作者：
Drozdz, Monika [1 ]
Kyziol, Karol [1 ]
Grzesik, Zbigniew [1 ]
机构：
[1] AGH Univ Sci & Technol, Fac Mat Sci & Technol, Dept Phys Chem & Modelling, Al A Mickiewicza 30, PL-30059 Krakow, Poland
来源：
MATERIALI IN TEHNOLOGIJE | 2017年 / 51卷 / 04期
关键词：
valve steels; chromium layer; oxidation; isothermal conditions; thermal shocks; EXHAUST VALVES; CORROSION;
D O I：
10.17222/mit.2016.151
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of a thin chromium layer (1 mu m) sputter-deposited on the surfaces of four valve steels (X33CrNiMn23-8, X50CrMnNiNbN21-9, X53CrMnNiN20-8 and X55CrMnNiN20-8) was studied at 900 degrees C under isothermal and thermal-shock conditions. It was determined that the oxidation resistance of coated steels is much better than that of uncoated ones. This situation is a result of the formation of highly protective Cr2O3 scales on the surfaces of coated materials. It was also demonstrated that a positive effect of a chromium addition on the oxidation resistance of the investigated steels is observed during a much longer period than the lifetime of a chromium coating.
引用
收藏
页码：603 / 607
页数：5
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