Heat treatment method for eliminating low-power segregation of 2Cr11Mo1VNbN blade steel

• Main Authors: WEI ZHENGYAN, ZHENG ZHUANG, SHI PUJI, XU LIWEI
• Format: Patent
• Language: English
• Published: 28.01.2015
• 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 heat treatment method for eliminating low-power segregation of 2Cr11Mo1VNbN blade steel, and belongs to the field of forging. The heat treatment method comprises the following steps: heating up blade steel to 900 DEG C, performing heat preservation uniformly for 4-6 hours, rapidly cooling to 700 DEG C within 10 min, performing heat preservation for 6-8 hours at 700 DEG C, and naturally cooling to room temperature after uniform heat preservation. According to the heat treatment method for eliminating low-power segregation of 2Cr11Mo1VNbN blade steel, the annealing treatment for eliminating stress is performed to obtain a stable sorbite structure, carbide precipitations are completely eliminated, all the low-power segregation defects are completely eliminated, and the passing rate is up to 100%.