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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

Inactive Publication Date: 2013-11-27
SHANDONG LAIWU JINLEI WIND POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the uneven composition and shortcomings of the existing wind power main shaft after heat treatment, the invention provides a heat treatment method for the wind power main shaft after forging. The wind power main shaft after the heat treatment of the invention has uniform composition, good mechanical properties and good impact resistance advantage

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

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Embodiment Construction

[0028] Related technical contents not mentioned below can adopt or learn from the prior art.

[0029]

[0030]

[0031] Above-mentioned embodiment is tested, and data is as follows:

[0032]

[0033] It can be seen that the heat-treated wind power main shaft of the present invention has the advantages of uniform composition, good mechanical properties, and good impact resistance. It can be seen from the experimental data that the comprehensive mechanical properties are significantly improved compared with the original ones, and the values ​​are very stable, which is indeed very good. It improves the problems of structure segregation and unevenness, and refines the grains, which plays a fundamental role.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/28C21D1/28
Inventor 伊廷雷
Owner SHANDONG LAIWU JINLEI WIND POWER TECH
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