echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Coatings News > Paints and Coatings Market > Influence of the particle size of the bottom layer powder on the performance of chromium carbide-nickel-chromium-aluminum-yttrium coating

    Influence of the particle size of the bottom layer powder on the performance of chromium carbide-nickel-chromium-aluminum-yttrium coating

    • Last Update: 2021-05-07
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

    The partial surface of a certain intermediate diffusion casing part needs to be sprayed with a chromium carbide-nickel-chromium-aluminum-yttrium coating to improve its wear resistance.
    Two kinds of nickel-chromium-aluminum-yttrium powders with particle sizes (53~106μm and 23~53μm) are used as the coating.
    Layer the bottom layer, and use the explosive spray method to spray the bottom layer and the surface layer.
    Use the scanning electron microscope (SEM), microhardness tester and electronic tensile testing machine to spray the metallographic structure and composition of the coating prepared by spraying the bottom powder of different particle sizes.
    The composition, hardness and bonding strength are analyzed and compared.

    The results show that the performance of chromium carbide-nickel-chromium-aluminum-yttrium coatings prepared by two kinds of nickel-chromium-aluminum-yttrium powders can meet the technical requirements.
    In contrast, the thickness uniformity of the nickel-chromium-aluminum-yttrium bottom layer prepared by the finer particle size powders It is better, and the content of unmelted particles and interface pollution is slightly lower, and the bottom bulge formed after spraying of the coarser particle size powder will produce a shielding effect, which affects the interface combination between the bottom layer and the surface layer, which is expressed as a coarse particle size powder The bonding strength of the prepared coating is 39.
    7MPa and the hardness is 598.
    1HV; while the bonding strength of the coating prepared by the fine particle powder is 58.
    7MPa and the hardness is 615.
    9HV.


    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent Echemi's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.