The invention discloses low-temperature 1800 MPa grade ultrahigh-strength pure titanium and a preparation method and application thereof.The preparation method comprises the steps of room-temperature forging, low-temperature surface shot blasting, low-temperature forging, alternate low-temperature surface shot blasting treatment and low-temperature forging, the microstructure of the ultrahigh-strength pure titanium is nanometer isometric crystals, and the grain size is 20-80 nm; the tensile strength of the ultrahigh-strength pure titanium at the liquid nitrogen temperature is larger than or equal to 1800 MPa, and the tensile strength at the room temperature is larger than or equal to 1200 MPa. The ultrahigh-strength pure titanium bar or wire is obtained through the simple and mature process, the finished titanium bar or wire is higher in surface hardness and has better wear resistance and expected fatigue durability, and the technical process has the advantages of being low in energy consumption, high in efficiency and capable of achieving industrial production. The pure titanium is expected to widely replace the titanium alloy in the fields of medical implants/medical instruments and aerospace structure materials.

    本发明公开了一种低温1800MPa级超高强度纯钛及其制备方法、应用,制备方法包括室温锻造、低温表面喷丸、低温锻造、交替低温表面喷丸处理和低温锻造,所述超高强度纯钛的微观结构为纳米等轴晶,晶粒尺寸为20~80nm;所述超高强度纯钛在液氮温度下的抗拉强度≥1800MPa,室温下的抗拉强度≥1200MPa。本发明通过简单成熟的工艺得到了超高强度纯钛棒材或丝材,成品钛棒材或丝材表面硬度更高,具有更好的耐磨性和预期的疲劳耐久性,技术工艺具有低能耗,高效率,可工业化生产的特点。有望使纯钛在医疗植入物/医疗器械领域和航天结构材料领域广泛替代钛合金的应用。


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    Title :

    Low-temperature 1800MPa-grade ultrahigh-strength pure titanium as well as preparation method and application thereof


    Additional title:

    一种低温1800MPa级超高强度纯钛及其制备方法、应用


    Contributors:
    HUANG CHONGXIANG (author) / WANG MINGSAI (author) / SU WULI (author) / HE QIONG (author) / GUO FENGJIAO (author)

    Publication date :

    2022-03-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS , Verändern der physikalischen Struktur von Nichteisenmetallen oder Nichteisenlegierungen / A61L Verfahren oder Vorrichtungen zum Sterilisieren von Stoffen oder Gegenständen allgemein , METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL / B64G Raumfahrt , COSMONAUTICS



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