Hitachi had nine patents in 3D printing during Q2 2024. The patent filed by Hitachi Ltd in Q2 2024 is for a fluid contact member with improved corrosion resistance. It includes a fluid contact portion made of a cobalt-based alloy phase with a dendrite structure and a compound phase containing chromium carbide. The spacing between secondary arms in the dendrite is 5 µm or less, with a preference for 3 µm or less, and the compound phase is discontinuously formed in the arm space. GlobalData’s report on Hitachi gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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Hitachi had no grants in 3D printing as a theme in Q2 2024.
Recent Patents
Application: Fluid contact member and method of manufacturing fluid contact member (Patent ID: US20240200679A1)
The patent filed by Hitachi Ltd. describes a fluid contact member with improved corrosion resistance. The fluid contact member includes a cobalt-based alloy phase with a dendrite and a compound phase containing chromium carbide. The average interval between adjacent secondary arms of the dendrite is 5 µm or less, with a preference for 3 µm or less. The compound phase is discontinuously formed in the dendrite arm space, enhancing the corrosion resistance of the fluid contact member.
The method of manufacturing the fluid contact member involves melting a raw material containing cobalt, chromium, and carbon on a substrate while controlling the heat input amount and supply amount of the raw material. The melting process can be carried out using additive manufacturing techniques with powder or wire rod raw materials. Lamination molding is performed at specific temperature ranges during the melting step, followed by a cooling step to control heat dissipation. Additionally, a heat treatment step is included in the manufacturing process to further enhance the properties of the fluid contact member. These manufacturing steps contribute to the improved corrosion resistance of the fluid contact member described in the patent.
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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.
GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
