Thermal treatment method for improving low-temperature impact work of air blower main shaft

A heat treatment method and low-temperature impact technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of low pass rate of heat treatment, high production cost, and inability to guarantee normal production of products, etc.
CN103173604AInactive Publication Date: 2013-06-26ZHONGYUAN SPECIAL STEEL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGYUAN SPECIAL STEEL
Publication Date
2013-06-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of production of air blower main shafts and in particular relates to a thermal treatment method for greatly improving a low-temperature impact toughness value in the mechanical performances of an air blower main shaft material. The thermal treatment method comprises the following steps of: selecting the air blower main shaft made of a 42CrMoA material, feeding the air blower main shaft to a furnace under a quenching temperature of 840 DEG C to 860 DEG C; heating up and equalizing the temperature, discharging the air blower main shaft out of the furnace after keeping the temperature, wherein the tapping temperature is 840 DEG to 860 DEG C; cooling in the air and placing the cooled air blower main shaft in a quenching station; injecting water for immersing and cooling; re-injecting water for immersing and cooling after cooling in the air; soaking in water or spraying for cooling after cooling in the air, repeating the process for 3 times to 6 times; controlling the outlet water temperature of the workpiece after the cooling to 140 DEG C to 160 DEG C; tempering at 590 DEG C to 630 DEG C after the quenching is finished for preserving the heat; cooling in the air to reach the room temperature after carrying out air-cooling and water-cooling alternatively upon tempering and discharging from the furnace, wherein the impact work value at -30 DEG C can be greatly improved relative to the conventional thermal treatment process.
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Description

technical field

[0001] The invention belongs to the technical field of fan main shaft production, and in particular relates to a heat treatment method capable of greatly improving the low-temperature impact toughness value of the mechanical properties of the fan main shaft material. Background technique

[0002] Under the background of vigorously promoting new energy sources in the country, wind power generation has become the focus of public attention. As an important part of wind turbines, fan shafts are also being sought after by major manufacturers. As a member of Bingzhuang Group, our company actively responds to the government's call to enter the field of fan spindle processing. In production, we found that some fan shaft products have very high requirements on the performance of materials, and the wind power machine manufacturers who need these products are often some large multinational companies.

[0003] In order to open up the market for the main shaft of the fa...

Claims

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