The invention discloses a short-time high-temperature high-strength cast titanium alloy, which comprises the following components in percentage by mass: 4.0 to 5.0 percent of Al, 2.0 to 3.0 percent of Sn, 3.0 to 6.0 percent of Zr, 0.1 to 1.5 percent of Mo, 0.35 to 0.45 percent of Si, 0.5 to 1.5 percent of W, 0.5 to 2.0 percent of Nb, 0.1 to 0.5 percent of Y, inevitable impurity elements in the titanium alloy with the content of not more than 0.1 percent, and the balance of Ti. A high-vacuum suspension smelting furnace provided with a water-cooled copper crucible is adopted for smelting and pouring, and the tensile strength of the obtained cast high-temperature titanium alloy is not lower than 600 MPa and 500 MPa at the high temperature of 700 DEG C and 750 DEG C respectively; after the isothermal oxidation is performed for 120 hours, the oxidation weight increment does not exceed 0.5 mg/cm < 2 > and 0.9 mg/cm < 2 > respectively. The heat resistance of the high-temperature titanium alloy cast in a short time is improved, and the requirement for the instant high-temperature strength of the high-temperature titanium alloy under the application condition of 700-750 DEG C can be met.

    本发明公开了一种短时用高温高强铸造钛合金,其成分按照质量百分比包括:4.0~5.0%的Al,2.0~3.0%的Sn,3.0~6.0%的Zr,0.1~1.5%的Mo,0.35~0.45%的Si,0.5~1.5%的W,0.5~2.0%的Nb,0.1~0.5%的Y和含量不超过0.1%的钛合金中不可避免的杂质元素,以及余量的Ti。本发明采用安装有水冷铜坩埚的高真空悬浮熔炼炉进行熔炼、浇注,获得的铸造高温钛合金在700℃和750℃高温下,抗拉强度分别不低于600MPa和500MPa;等温氧化120h后,氧化增重分别不超过0.5mg/cm2和0.9mg/cm2。本发明提高了短时铸造高温钛合金的热强性,可以满足其在700℃~750℃应用条件下瞬时高温强度的要求。


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    Title :

    Short-time high-temperature high-strength titanium alloy and preparation method and application thereof


    Additional title:

    一种短时用高温高强钛合金及其制备方法与应用


    Contributors:
    FU BINGUO (author) / WANG CHUNTONG (author) / SHEN JIAFENG (author) / LI GUOLU (author) / WANG YUFENG (author) / DONG TIANSHUN (author) / LI JINGKUN (author) / LIU JINHAI (author)

    Publication date :

    2023-05-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C22C Legierungen , ALLOYS / B22D CASTING OF METALS , Gießen von Metallen / B64C AEROPLANES , Flugzeuge / B64G Raumfahrt , COSMONAUTICS / C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS , Verändern der physikalischen Struktur von Nichteisenmetallen oder Nichteisenlegierungen



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