Method for preparing Zr-2.5Nb alloy rod with uniform small structure phase

• Main Authors: LIU XIANGHONG, SHANG JINJIN, WANG XIAOLIANG, FENG YONG, ZHENG NIANQING, LAI YUNJIN, DU YUXUAN, LEI JINWEN, HE YONGSHENG, ZHANG XIAOYUAN, LI SHAOQIANG
• Format: Patent
• Language: English
• Published: 11.11.2015
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for preparing a Zr-2.5Nb alloy rod with a uniform small structure phase. The Zr-2.5Nb alloy rod with the uniform small structure phase is obtained through the following steps of carrying out cogging and upsetting and rolling on a Zr-2.5Nb alloy ingot, carrying out intermediate forging and high-temperature water quenching through the short-term melting-down warm-keeping and forging technology, and carrying out low-temperature forging and finished product forging through the short-term melting-down warm-keeping and forging technology; the deformation is required to be not smaller than 30%. The structure evenness of blank can be improved, and the hydrogen absorption phenomenon in high-temperature long-time heat preservation of the blank is restrained; through high-temperature water quenching, the blank structure can be recrystallized, microstructure evolution is achieved, and a wide and thick grain boundary is eliminated; through frequent upsetting, rolling and forging, the blank structure can be made uniform, and therefore the Zr alloy rod with the uniform small structure is prepared, and the method is suitable for large-scale industrial production.