Detonation Spraying of Cr3C2-NiCr Coatings and Their Properties

被引:0
作者
Vladimir Yu. Ulianitsky
Igor S. Batraev
Denis K. Rybin
Dina V. Dudina
Alexandr A. Shtertser
Arina V. Ukhina
机构
[1] Lavrentyev Institute of Hydrodynamics SB RAS,
[2] Novosibirsk State Technical University,undefined
[3] Institute of Solid State Chemistry and Mechanochemistry SB RAS,undefined
来源
Journal of Thermal Spray Technology | 2022年 / 31卷
关键词
abrasive wear; chromium carbide; detonation spraying; microstructure; residual stress;
D O I
暂无
中图分类号
学科分类号
摘要
Detonation spraying of wear-resistant Cr3C2-NiCr coatings was carried out using a two-fuel 0.61C2H2 + 0.26C3H8 + O2 explosive mixture. The coatings were formed from agglomerated powders containing 10, 20 and 25 wt.% of the nichrome binder. The deposition efficiency was measured. The microstructure, bonding strength, hardness and wear resistance of the coatings were studied as functions of the spraying distance and spraying angle. The coatings of the highest quality had a porosity of less than 0.5%. Irrespective of the binder content, the bonding strength of the coatings was equal to or greater than 150 MPa. In the ASTM G-65 abrasion test, the volume loss of Cr3C2-20NiCr coating was 3.1 mm3/1000 rev. In addition, the level of residual stress was evaluated using the Almen test. The coatings of the highest quality possessed compressive residual stresses. For applications under wear conditions and increased mechanical loads, a coating containing 20% of NiCr binder is recommended. The results of this study can be useful for selecting the modes of the coating deposition on components of complex shape.
引用
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页码:598 / 608
页数:10
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