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Heat treatment process for 42CrMo wind power spindle

A wind power spindle and process technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., to achieve the effects of improving comprehensive mechanical properties, fully austenitizing, and increasing quenching temperature

Inactive Publication Date: 2015-01-28
TONGYU HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardenability of this material is limited, and the performance is difficult to meet the requirements

Method used

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  • Heat treatment process for 42CrMo wind power spindle
  • Heat treatment process for 42CrMo wind power spindle
  • Heat treatment process for 42CrMo wind power spindle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Such as image 3 As shown, a heat treatment process for a 42CrMo wind power main shaft, the specific steps are,

[0020] Heat the wind power main shaft with a temperature below 400°C to 650°C-660°C at a speed of below 60°C / h, keep it warm for 5 hours, then heat it to temperature T at a speed of below 80°C / h, keep it warm for more than 14 hours, and cool it with water for 80 minutes to wind power Spindle temperature is below 300°C, heated to 300°C-330°C, kept for 5h, then heated to 620°C-640°C at a speed of less than 60°C / h, kept at a temperature of more than 22h, and then air-cooled to 300°C at a speed of less than 30°C / h Below ℃, T=860℃~880℃, specifically, T=860℃, 870℃ or 880℃.

[0021] figure 2 The existing heat treatment process of 42CrMo wind power main shaft is shown.

[0022] Due to reasons such as low quenching temperature and short water cooling time, the existing process cannot meet the mechanical property requirements. The invention increases the quenchin...

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Abstract

The invention provides a heat treatment process for a 42CrMo wind power spindle. The heat treatment process comprises the following concrete steps: heating the wind power spindle with the temperature of less than 400 DEG C to 650-660 DEG C at the speed of less than 60 DEG C / h, keeping the temperature for 5 hours, heating to the temperature T at the speed of less than 80 DEG C / h, keeping the temperature for more than 14 hours, cooling by water for 80 minutes until the temperature of the wind power spindle is less than 300 DEG C, heating to 300-330 DEG C, keeping the temperature for 5 hours, heating to 620-640 DEG C at the speed of less than 60 DEG C / h, keeping the temperature for more than 22 hours, and cooling by air to less than 300 DEG C at the speed of less than 30 DEG C / h, wherein T is 860-880 DEG C. According to the heat treatment process, the quenching temperature is increased to be 860-880 DEG C, a workpiece is fully austenitized, the depth of a hardening layer is increased, the water-cooling time is prolonged to be 80 minutes to increase the cooling speed of the wind power spindle, a lower bainite or martensite structure is obtained, and the comprehensive mechanical property of the spindle is improved.

Description

technical field [0001] The invention relates to the technical field of wind power equipment manufacturing, in particular to a heat treatment process for a 42CrMo wind power main shaft. Background technique [0002] In recent years, with the continuous development of the heavy industry, the requirements for the performance of forgings have become higher and higher. The sampling position of some large forgings has gradually developed from the outer skin to sampling at R / 3 from the outer circle, or even deeper. The main shaft of wind power is an important part of wind power generation equipment. The main materials are 42CrMo and 34CrNiMo6, and the heat treatment uses quenching and tempering process. For a MW-level wind power spindle made of 42CrMo by a foreign company, the diameter of the sampling location is greater than 500mm, and the distance between the sample and any heat-treated surface is not less than 80mm. The hardenability of this material is limited, and the perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/28C21D6/00
Inventor 司兴奎刘殿山呙文武颜廷勇李潜
Owner TONGYU HEAVY IND
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