Carburizing direct quenching process for large-scale wind power gear/gear shaft

A technology for wind power and gears, which is applied in the field of carburizing and direct quenching process of large wind power gears/pinion shafts. It can solve problems such as the inability to meet large-scale and high-efficiency production requirements, long equipment working hours, and complicated routes, and achieve cost reduction. The effect of reduced length and reduced amount of retained austenite

Inactive Publication Date: 2012-03-28
天津市祥威传动设备有限公司
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  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the route of the traditional carburizing process is very complicated, which requires lon

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  • Carburizing direct quenching process for large-scale wind power gear/gear shaft
  • Carburizing direct quenching process for large-scale wind power gear/gear shaft
  • Carburizing direct quenching process for large-scale wind power gear/gear shaft

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[0016] The present invention will be described in further detail below with reference to the drawings and specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0017] A carburizing and direct quenching process for large-scale wind power gears / pinions, the process steps are:

[0018] (1) Strong infiltration: carry out strong infiltration in a carburizing furnace, the temperature of the infiltration is 910-970℃, the time is 8-72 hours, and the C1 is 0.9-1.2%C;

[0019] (2) Diffusion: Diffusion in the carburizing furnace, the diffusion temperature is: 910-970℃, the time is 2-8 hours, and the C2 is: 0.65-0.9%C

[0020] (3) Low temperature heat preservation: heat preservation in the carburizing furnace, the heat preservation temperature is: 620-700℃, and the time is 2-8 hours;

[0021] (4) Heat preservation before oil extraction: heat preservation temperature: 810-850℃, time is 2-8 hours,

[00...

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Abstract

The invention relates to a carburizing direct quenching process for a large-scale wind power gear/gear shaft. The process comprises the following steps of: (1) carburizing at the temperature of between 910 and 970 DEG C for 8 to 72 hours, wherein C1 is 0.9 to 1.2 percent C; (2) diffusing at the temperature of between 910 and 970 DEG C for 2 to 8 hours, wherein C2 is 0.65 to 0.9 percent C; (3) keeping temperature at low temperature of between 620 and 700 DEG C for 2 to 8 hours; (4) keeping the temperature at the temperature of between 810 and 850 DEG C for 2 to 8 hours before oil extraction; (5) performing the oil extraction, namely moving workpieces from a carburizing furnace to a quenching furnace for quenching; and (6) tempering in a tempering furnace at the temperature of between 150 and 200 DEG C for 4 to 48 hours. In the carburizing direct quenching process for the large-scale wind power gear/gear shaft, a process of direct tapping and quenching after carburizing is adopted, the intermediate temperature heat-preserving phase after the carburizing is added, the time of the process is reduced by about one third, the cost is reduced by about one half, the length of martensite of the workpieces can be reduced, and the number of residual austenite can be reduced obviously.

Description

technical field [0001] The invention relates to the technical field of large-scale gearbox production of wind power equipment, in particular to a carburizing direct quenching process of large wind power gears / pinion shafts. Background technique [0002] At present, there are many types of carburizing processes for large gears / pinion shafts, and the process flow is complicated. For example, the carburizing process of traditional large gears / pinions mostly needs to go through steps such as strong infiltration, diffusion, slow cooling, oil quenching, and tempering, that is: after carburizing, it is slowly cooled to room temperature, and then heated to the quenching temperature to be quenched. Some also increase the normalizing sequence before quenching. It can be seen that the route of the traditional carburizing process is very complicated, which requires long hours of equipment and high cost, and cannot meet the needs of large-scale and high-efficiency production. Contents...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C8/20C21D9/32C21D1/18
Inventor 檀永健林全忠王磊
Owner 天津市祥威传动设备有限公司
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