Heat treatment method and system for slender rolling mold

• Main Authors: CHENG YAHUI, SHI HONGRUI, YAN HUIHUI, CAO JINWEN, ZHANG JIAN, ZHANG WEN, MA GUIBIAO, LUO QIANQIAN, LI HUAILIN
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2023
• 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 method and system for a slender rolling die, and the method is used for zirconium alloy rolling, and comprises the following steps: carrying out staged heating and heat preservation treatment on the rolling die in a vacuum state, and keeping the heat preservation temperature of the final stage at 1100-1150 DEG C; performing staged gas quenching treatment on the rolling mold subjected to heating and heat preservation treatment, wherein the final quenching air pressure is 0.7-0.85 Mpa; and carrying out cold treatment and tempering treatment on the rolling mold subjected to gas quenching treatment. The rolling die is subjected to staged heating and heat preservation treatment, staged gas quenching treatment, cold treatment, tempering treatment and the like in a vacuum gas quenching and nitrogen protection mode, so that the structural stress of the rolling die and deformation caused by thermal stress are relieved, and it is guaranteed that all working faces of the rolling