Method for producing Hard Metal Powder and Hard Metal Powder

Juha Lagerbom (Inventor), Marjaana Karhu (Inventor), Hanna-Mari Sinilehto (Inventor), Ulla Kanerva (Inventor)

    Research output: PatentPatent


    The invention relates to a method for producing hard metal powder suitable for manufacturing hard metal products comprising metal carbides and a binder. To provide a method which is easy to carry out and which provides high quality hard metal powder, the method is characterized by the steps of: a) dissolving in water, water soluble raw materials and a binder source to form an aqueous solution, b) drying the aqueous solution to form a precursor powder having the raw materials homogenously distributed throughout the precursor powder, c) decomposing the precursor powder by heating the powder in an inert atmosphere to remove gas evolved in the decomposition of the raw materials, d) grinding the precursor powder and mixing it with a liquid media to produce a suspension, e) spray drying the suspension to agglomerate the precursor powder, and f) heat treating the agglomerated precursor powder to form a hard metal powder containing agglomerates of carbides evenly distributed and bonded to a metallic matrix.

    Patent family as of 14.12.2021
    DE602018015850 D1 20210506 DE201860015850T 20180216      
    EP3582916 A1 20191225 EP20180709060 20180216      
    EP3582916 B1 20210421 EP20180709060 20180216      
    FI128311 B 20200313 FI20170005140 20170217      
    FI20175140 L 20180818 FI20170005140 20170217      
    US2020230702 AA 20200723 US20180486581 20180216      
    WO18150100 A1 20180823 WO2018FI50116 20180216

    Link to current patent family on right 

    Original languageEnglish
    Patent numberEP3582916
    IPCC22C 29/ 10 A I
    Priority date16/02/18
    Publication statusPublished - 25 Dec 2019
    MoE publication typeH1 Granted patent


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