High-carbon steel track bushing

• Main Authors: KISE MICHAEL T, RECKER ROGER L, GILL, STEVEN, E, LAHOD CHANDRASEKHAR R, PICKRILL, RICHARD, J
• Format: Patent
• Language: Chinese; English
• Published: 29.04.2022
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

An example bushing (204) has three portions along a radial direction thereof, including an inner portion (410) closest to a central bore of the bushing (204), an outer portion (404) farthest from the central bore, and a core portion (406) between the inner portion (410) and the outer portion (404). The core portion (406) has a hardness less than a hardness of the inner portion (410) or the outer portion (404) of the liner (204). The liner (204) may be formed using high-carbon steel, which in some cases may be a spheroidal cementite crystal structure. A rough liner may be formed using high carbon steel followed by a direct hardening process and an induction hardening process on the inner surface (412) closest to the central bore of the liner (204). Induction hardening on the inner surface (412) may harden the outer portion (404) while tempering the core portion (406) of the liner (204). 示例性衬套(204)具有沿着其径向方向的三个部分，包括最靠近衬套(204)的中心孔的内部部分(410)、最远离中心孔的外部部分(404)以及在内部部分(410)与外部部分(404)之间的芯部分(406)。芯部分(406)具有的硬度小于衬套(204)的