Application of PAG quenching liquid in quenching and tempering process of wind power main shaft of more than 20t

A wind power spindle and quenching liquid technology, applied in the direction of quenching agent, manufacturing tools, furnaces, etc., can solve the problems of high quenching cost, poor labor environment, unfavorable environmental protection, etc., and achieve low comprehensive cost, long effective life, and oxidative degradation. Effects of low aging rates

Pending Publication Date: 2022-05-06
TONGYU HEAVY IND
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Problems solved by technology

The ideal quenching medium has a strong cooling capacity in the high temperature zone and a moderate cooling rate in the low temperature zone, which can not only ensure the performance of the workpiece, but also reduce the risk of quenching cracking, but it is difficult to have a quenching medium that can reach or approach the ideal Cooling properties of the cooling medium
The traditional quenc

Method used

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  • Application of PAG quenching liquid in quenching and tempering process of wind power main shaft of more than 20t
  • Application of PAG quenching liquid in quenching and tempering process of wind power main shaft of more than 20t
  • Application of PAG quenching liquid in quenching and tempering process of wind power main shaft of more than 20t

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[0016] Example

[0017] The properties and concentration of the selected PAG quenchant are shown in Table 1.

[0018] name concentration Temperature (℃ / s) V / max(℃ / s) V / 300(℃ / s) PAG 5％-9％ 30 ≥190 ≤80

[0019] Table 1

[0020] The material of the main shaft selected for commissioning is 34crnimo6, and the quenching and tempering weight is 20.1t. Its mechanical properties are shown in Table 2 below. The quenching and tempering dimensions and sampling are shown in Table 2 Figure 2 As shown in.

[0021]

[0022] Table II

[0023] The commissioning process flow of the application is: quenching heating and insulation stage, quenching cooling stage and tempering stage, among which the operations of quenching heating and insulation stage and tempering stage are as follows: Figure 3 As shown in.

[0024] In the quenching and cooling stage, PAG quenching liquid is used for single liquid quenching. During quenching, the control points are as follows:

[0025] 1. T...

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Abstract

According to the application of the PAG quenching liquid in the quenching and tempering process of the wind power main shaft of 20 t or above, a using method comprises the following steps that a workpiece is fed into the PAG quenching liquid after being discharged from a furnace, the cooling time is controlled to be 9.5-11 min/100 mm, the initial liquid temperature of the PAG quenching liquid is controlled to be 15-40 DEG C, and the liquid temperature is controlled to be 15-50 DEG C in the quenching process. The PAG quenching agent used in the invention has the advantages of unique inverse solubility, adjustable concentration, good thermal stability, no deterioration after long-term use, long effective life, no toxicity, no smoke, no flame, health, environmental protection, low comprehensive cost and the like, and the cooling speed of the PAG quenching medium can be realized by adjusting solution concentration, quenching temperature and stirring. The PAG quenching agent is relatively low in oxidative degradability and aging rate, good in hydrolytic stability and relatively high in process adaptability, the optimal concentration and the quenching cooling process of the PAG quenching agent used in the quenching and tempering process of the wind power main shaft of 20 t or above are found through the mode of using the PAG quenching agent and adjusting the concentration and the flow speed of quenching liquid, and the PAG quenching agent has the advantages of being low in energy consumption, low in cost and the like. Therefore, the problems of environmental pollution, high energy consumption and the like caused by a traditional quenching process are avoided.

Description

technical field [0001] The invention relates to the field of preparation of wind power main shafts of more than 20 tons, specifically the application of PAG quenching liquid in the quenching and tempering process of wind power main shafts of more than 20 tons. Background technique [0002] In the heat treatment industry, the quenching medium can be divided into: water, oil, organic polymer quenching agent. The ideal quenching medium has a strong cooling capacity in the high temperature zone and a moderate cooling rate in the low temperature zone, which can not only ensure the performance of the workpiece, but also reduce the risk of quenching cracking, but it is difficult to have a quenching medium that can reach or approach the ideal Cooling properties of the cooling medium. The traditional quenching and tempering cooling of the spindle adopts the cooling method of water quenching and oil cooling double liquid quenching, which can meet the quenching requirements of convent...

Claims

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Application Information

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IPC IPC(8): C21D9/28C21D1/56
CPCC21D9/28C21D1/56
Inventor 杨后雷沈元国刘少斌刘崇鲁李福强
Owner TONGYU HEAVY IND
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