Heat treatment method and device for FV520 (B) steel for centrifugal compressor impeller

• Main Authors: ZHU BINHAI, DAI LINTONG, HE HONGJUN
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• 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 relates to a heat treatment method and device for FV520 (B) steel for a centrifugal compressor impeller, and the method comprises the following steps: after rough machining of a material, carrying out solid solution aging treatment; the solid solution aging treatment comprises the following steps: placing a roughly machined part in a heat preservation barrel, charging, filling argon, gradually heating to 1050 +/-10 DEG C after filling for a certain time, preserving heat for 1 hour, discharging the heat preservation barrel out of the furnace, and uncovering; and after the temperature is lowered to 400 DEG C, the inflation amount is reduced, the temperature is lowered to 200 DEG C or below, argon inflation is stopped, and cooling is conducted to the normal temperature. Aging treatment is carried out, specifically, the heat preservation barrel in which the workpiece is placed is loaded in a furnace, argon is introduced, after filling is carried out for a certain time, the temperature is gradually i