Method for manufacturing stationary blade ring blank forged piece of F-grade combustion gas turbine

Abstract

The invention relates to a forging technology, in particular to a method for manufacturing a stationary blade ring blank forged piece of an F-grade combustion gas turbine. The method comprises the following steps of: (1) checking raw materials and blanking; (2) heating a steel ingot or a steel blank, cogging and performing forging deformation processing, wherein an initial forging temperature is 1,220 DEG C, and a final forging temperature is 850 DEG C; (3) performing ring rolling on a forged piece, namely controlling the temperature of a forging blank to be between 1,150 and 950 DEG C to perform hole-expanding ring rolling; (4) quenching by using residual heat, namely keeping a ring roller idling, spraying water for cooling so as to quickly cool a forged ring to the temperature of 950 DEG C, hanging the forged ring in a wind field for forced cooling, and cooling the forged ring to a temperature of less than or equal to 150 DEG C within half an hour; (5) performing rough machining; (6) performing tempering thermal treatment; (7) performing ultrasonic detection / magnetic powder detection; (8) testing mechanical performance; and (9) checking a product. The method has the advantages that: a thermal treatment process of quenching and tempering by using the residual heat of the forged piece after a ring is rolled is used, the deformation of the forged piece during the thermal treatment is avoided, the consumption of steel and energy is lowered, manufacturing procedures are reduced, and production efficiency is obviously improved.

Description

technical field [0001] The invention relates to the technical field of forging technology, in particular to a method for manufacturing a blank forging of an F-class gas turbine stationary vane ring. Background technique [0002] The F-class gas turbine 680 unit is a new product developed by the introduction of SIEMENS gas turbine technology in my country. Among them, the stator blade rings made of S235JRG3 and 16Mo3 must withstand complex and alternating loads for a long time in a high-temperature and high-pressure operating environment. The manufacturing process of this part has no precedent in China and can be referred to. [0003] Previously, the main process of the production process of F-class gas turbine stator blade rings was: after the forgings were reamed by ring rolling machine and tempered, rough machining, quenching and tempering heat treatment, secondary rough machining, stress relieving heat treatment, and fine finishing processing, and finally installation. ...

AI Technical Summary

Problems solved by technology

The consequence of this is that the size of the forging is seriously deformed, causing the size of the part to be processed and scrapped, or the margin required for the deformation must be added in advance, which is likely to cause a large amount of technical waste of materials

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