HYPOTUBE WITH ENHANCED STRENGTH AND DUCTILITY
    49.
    发明申请
    HYPOTUBE WITH ENHANCED STRENGTH AND DUCTILITY 审中-公开
    具有增强强度和强度的HYPOTUBE

    公开(公告)号:US20140378916A1

    公开(公告)日:2014-12-25

    申请号:US13925559

    申请日:2013-06-24

    Inventor: John A. Simpson

    Abstract: Hypotubes for use with intra-corporal medical devices are fabricated from a stainless steel alloy exhibiting a combination of excellent yield strength with improved ductility as compared to cold worked AISI 304 stainless steel, from which hypotubes are typically fabricated. The stainless steel alloy may have: (1) a nitrogen content, a carbon content, or a combined nitrogen and carbon content that is greater than that allowed in AISI 304 stainless steel, providing an increased concentration of interstitial atoms to stabilize dislocations generated by cold work and/or (2) a combined nickel and manganese content that is lower than that allowed in AISI 304 stainless steel to reduce the stability of the austenitic structure, enabling a greater percentage of martensite to be stress-induced by a given level of cold work as compared to AISI 304 SS. Following cold working, the alloy may be heat treated to raise its yield strength by strain aging.

    Abstract translation: 与体内医疗器械一起使用的低管与通常制造海波管的冷加工AISI 304不锈钢相比,由不锈钢合金制成,其具有优异的屈服强度和改进的延展性的组合。 不锈钢合金可能具有:(1)氮含量,碳含量或组合的氮和碳含量大于AISI 304不锈钢中允许的含量,提供间隙原子浓度增加,从而稳定由冷产生的位错 工作和/或(2)低于AISI 304不锈钢中允许的镍和锰的组合,以降低奥氏体结构的稳定性,使得通过给定的冷却水平可以使更大百分比的马氏体受到应力诱导 工作与AISI 304 SS相比。 冷加工后,可以对合金进行热处理,以通过应变老化提高其屈服强度。

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