The invention discloses a fatigue strengthening method for a laser additive train axle and a remanufactured axle, and the method comprises the following steps: carrying out laser additive repair treatment on a damaged part of a train axle to be repaired to obtain a train axle with a cladding layer; the cladding layer is subjected to heat treatment, and a heat-treated cladding layer is obtained; and the cladding layer subjected to heat treatment is subjected to ultrasonic impact treatment, then heat treatment and grinding treatment are conducted, and the repaired train axle is obtained. According to the method, laser additive repair, composite directional ultrasonic impact and heat treatment technologies are combined, so that the size recovery of the damaged part of the axle is realized, the defects and stress of the additive repair part of the axle are reduced, the anti-fatigue performance of the axle is improved, the problems of defects such as pores and incomplete fusion of the axle can be solved, residual tensile stress is converted into residual compressive stress, and the service life of the axle is prolonged. The surface crack diffusion is inhibited, the surface grain structure is refined, and the fatigue performance and the surface fretting fatigue resistance of the whole axle are improved.

    本发明公开了一种激光增材列车车轴的疲劳强化方法及再制造车轴,所述方法包括,将待修复列车车轴的损伤部位进行激光增材修复处理,得到带有熔覆层的列车车轴;将所述熔覆层进行热处理,得到热处理的熔覆层;将所述热处理的熔覆层进行超声冲击处理,随后热处理和磨削处理得到修复后的列车车轴。本发明结合激光增材修复,复合定向超声冲击和热处理技术,在实现车轴损伤部位的尺寸恢复的同时,减少车轴增材修复部位的缺陷和应力,提升其抗疲劳性能,可以解决修复车轴孔隙、未熔合等缺陷问题,将残余拉应力转变为残余压应力,抑制表面裂纹扩散,将表面晶粒组织细化,提升整体车轴的疲劳性能和表面抗微动疲劳性能。


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    Title :

    Fatigue strengthening laser additive train axle repairing method and remanufactured axle


    Additional title:

    一种疲劳强化的激光增材列车车轴修复方法及再制造车轴


    Contributors:
    ZOU JIANFENG (author) / ZHU HONGBIN (author) / YUAN NING (author) / WANG XINGTAO (author) / CHEN WENXING (author) / ZHAO ANLIN (author) / LIU JUNXIANG (author) / LYU YA (author) / LIU XING (author) / XU YONG (author)

    Publication date :

    2024-03-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B22F Verarbeiten von Metallpulver , WORKING METALLIC POWDER / B33Y ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING , Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern / B60B VEHICLE WHEELS , Räder für Fahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / C23C Beschichten metallischer Werkstoffe , COATING METALLIC MATERIAL



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