Heat treatment process for eliminating banded structure in steel

• Main Authors: YAN MUFU, DAI XINYANG, TU LUHAN, ZHENG HUAIBEI, YANG YING, YAN FUYAO, ZHU LEI, ZHANG YANXIANG
• Format: Patent
• Language: Chinese; English
• Published: 31.01.2023
• Subjects: CHEMISTRY; 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

The invention discloses a heat treatment process for eliminating banded structures in steel and belongs to the technical field of metal heat treatment. The process comprises the following steps: solid solution quenching: heating steel from room temperature to a certain temperature, preserving heat for a period of time, and then quickly cooling; the certain temperature is + 100-150 DEG C of the redissolution temperature of the carbides at the banded structure, and the period of time is the time of complete redissolution of the carbides at the banded structure at the solid solution temperature; the first quenching temperature is 10-20 DEG C lower than the solid solution quenching temperature, and the steel part is rapidly cooled after the core part reaches the temperature; the quenching process is repeated until the set circulating quenching frequency is reached, and the quenching temperature is reduced by 10-20 DEG C compared with the previous quenching temperature every time the quenching frequency is increas