Production method for improving wear resistance of heat-treated steel rail

• Main Authors: ZHENG JIANGUO, WANG JUN, OUYANG MINLU, FEI JUNJIE, DONG MAOSONG, ZHOU JIANHUA, ZHU MIN
• Format: Patent
• Language: Chinese; English
• Published: 17.09.2021
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a production method for improving wear resistance of a heat-treated steel rail. The production method comprises the step of carrying out dynamic accelerated cooling heat treatment on a hot-rolled steel rail head, wherein the initial cooling temperature is controlled to be 720-800 DEG C, a dynamic stage cooling process is adopted, namely the whole rail head cooling process is divided into seven stages, the cooling speed of the first stage is 5-7 DEG C/s, the cooling speed of the second stage is 7-8 DEG C/s, the cooling speed of the third stage is 8-10 DEG C/s, the cooling speed of the fourth stage is 1-2 DEG C/s, the cooling speed of the fifth stage is 4-6 DEG C/s, the cooling speed of the sixth stage is 3-4 DEG C/s, the cooling speed of the seventh stage is 2-3 DEG C/s, when the temperature of the rail head is reduced to 300 DEG C or below, accelerated cooling is stopped, and finally natural cooling is conducted to the room temperature. According to the production method, by reasonably