Manufacturing method of valve forged piece for ultra-supercritical turbine and valve forged piece

An ultra-supercritical and steam turbine technology, which is applied to mechanical equipment, engine components, valve devices, etc., can solve the problems of high waste rate, coarse grain, and affecting high-end steam turbines, and achieve the effect of improving the yield
CN106480253AInactive Publication Date: 2017-03-08SHANGHAI TENGHUI FORGING +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI TENGHUI FORGING
Publication Date
2017-03-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a manufacturing method of an FB2 valve forged piece for an ultra-supercritical turbine. The method comprises the following steps of smelting, forging, valve forged piece heat treatment, machining and heat treatment. The invention further discloses a valve forged piece manufactured by the adoption of the manufacturing method of the FB2 valve forged piece for the ultra-supercritical turbine. According to the manufacturing method, operation is reasonable, effective boron is contained, hardenability of the forged piece reaches the standard, the grain size of the final forged piece is larger than or equal to the grade 3, and according to the manufacturing method of the FB2 valve forged piece for the 625 DEG C ultra-supercritical turbine and the FB2 valve forged piece, the situation that Y-shaped cracks appear in the center of the forged piece is avoided.
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Description

technical field

[0001] The invention relates to a method for manufacturing a FB2 valve forging (valve seat, valve disc, valve stem, ring) for a steam turbine of a million-kilowatt class ultra-supercritical generating set with a heat-resistant temperature of 625°C and the valve forging. Background technique

[0002] CO 2 The environmental problems caused by emissions are increasingly concerned by the world, and the development and adoption of ultra-supercritical technology is currently the key to reducing CO 2 An important and proven measure of emissions. my country's primary energy is dominated by coal and will not change in a relatively long period of time. Environmental protection has become a new impetus for the development and adoption of supercritical units in my country. The temperature parameters of super (super) critical units that are already in operation or in the design and construction stage are mostly 566-600 °C, and the pressure is divided into three levels: ...

Claims

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