Method for performing heat treatment on wind power main shaft after forging

A post-forging heat treatment and wind power spindle technology, which is applied in the field of heat treatment and can solve problems such as uneven composition of wind power spindles
CN103409606AInactive Publication Date: 2013-11-27SHANDONG LAIWU JINLEI WIND POWER TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG LAIWU JINLEI WIND POWER TECH
Publication Date
2013-11-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for performing heat treatment on a wind power main shaft after forging. The method is characterized by adopting twice normalizing and once tempering, wherein normalizing for the first time is carried out, namely, performing heat preservation on a forge piece at 960+ / -5 DEG C for 14 hours, and cooling to 280 to 320 DEG C and preserving heat for 12 hours; normalizing for the second time is carried out, namely, heating to 880+ / -5 DEG C and preserving heat for 8 hours, and cooling to 280 to 320 DEG C and preserving heat for 12 hours; tempering is carried out, namely, heating to 650+ / -5 DEG C and preserving heat for 20 hours, and cooling to 250 DEG C and discharging out of a furnace. By adopting the method for performing heat treatment after forging, the wind power main shaft has the advantages of uniform components, tiny grain crystals, good mechanical properties and good impact-resistant effect.
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Description

technical field

[0001] The invention relates to a heat treatment method, in particular to a post-forging heat treatment method for a high-temperature wind power main shaft with secondary normalizing and primary tempering. Background technique

[0002] The wind power main shaft is an indispensable key component of the wind turbine, with strict performance requirements, the surface strength is greater than 800MPa, the impact energy (-40°C) is greater than 45J, the grain size is greater than 6, free ferrite, pearlite, etc. are not allowed .

[0003] In the prior art, after the heat treatment, the mechanical properties of the wind power main shaft are always found to be unsatisfactory during the modulation process. The analysis mainly shows that the composition of the material is uneven, the segregation is serious, and the grains are not fine enough, which affects the mechanical properties. , especially shocks. Contents of the invention

[0004] In order to overco...

Claims

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