The steel for the traveling wheel comprises the following main chemical components in percentage by weight: 0.41 to 0.45 percent of C, 0.27 to 0.37 percent of Si, 0.65 to 0.80 percent of Mn, 1.10 to 1.30 percent of Cr, 1.30 to 1.45 percent of Ni, 0.15 to 0.25 percent of Mo and 0.025 to 0.035 percent of Nb. According to the invention, the Nb and N elements are added to form a second-phase alloy carbonitride, and a heat treatment process of step increasing water quenching and tempering is matched, so that the heat treatment performance of the traveling wheel is improved. Grains are obviously refined; the performance of the travelling wheel is improved; the tensile strength is 1300-1400 MPa, the yield strength is 1100-1200 MPa, the ductility is larger than or equal to 17%, the rim tread hardness is 360-400 HB, and the hardening depth reaches 30 mm or above.

    本发明公开了一种走轮用钢、走轮及其热处理方法和生产方法,所述走轮用钢的主要化学成分及重量百分比为:C 0.41~0.45%,Si 0.27~0.37%,Mn0.65~0.80%,Cr 1.10~1.30%,Ni 1.30~1.45%,Mo 0.15~0.25%,Nb 0.025~0.035%,本发明利用Nb、N元素的加入,形成第二相合金碳氮化物,配合阶梯递增水量淬火和回火的热处理工艺,显著细化晶粒并改善走轮性能;其抗拉强度为1300~1400MPa,屈服强度为1100~1200MPa、延伸率≥17%,轮辋踏面硬度为360‑400HB,淬硬深度达到30mm以上。


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    Title :

    Steel for traveling wheel, traveling wheel and heat treatment method and production method of traveling wheel


    Additional title:

    一种走轮用钢、走轮及其热处理方法和生产方法


    Contributors:
    CHEN GANG (author) / WU ZHIYANG (author) / GONG YANHUA (author) / GUO XINCHUN (author) / WANG WENDONG (author) / ZHANG YONG (author) / HUANG XIAOQING (author) / TAO YINGLONG (author) / YANG XIAODONG (author)

    Publication date :

    2025-03-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C22C Legierungen , ALLOYS / B66C Krane , CRANES / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS



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