Processing technology for gearbox gear

A processing technology and gearbox technology, which is applied in the processing technology field of marine gears, can solve problems such as low hardness, insufficient toughness, and low motion accuracy, and achieve the goals of reducing carburizing temperature and quenching temperature, prolonging carburizing time, and reducing noise Effect

Inactive Publication Date: 2015-07-08
SUZHOU LU LU SHUN ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a marine low-carbon steel gear processing technology with high motion precision, high load, high surface hardness and good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example one:

[0024] The heat treatment methods for carburizing and quenching of transmission gears include:

[0025] A. Carburizing step, put the gear into the material basket, and then put it into the sealed box-type multi-purpose heating furnace. The heating furnace is raised from room temperature to 900±5°C for carburizing, and the carburizing time is 3 to 4 hours; this embodiment Among them, the heating furnace was raised from room temperature to 900°C, and the carburizing time was 3 hours and 40 minutes. The carburizing is divided into an initial stage, a strong infiltration stage and a diffusion stage; among them: the carbon potential CP of the initial stage of carburizing is 0.95±0.03C%, 9-11 minutes;

[0026] The carbon potential CP of the intense carburizing stage is 1.06±0.03C%, 170-190 minutes; the carbon potential CP of the diffusion stage of carburizing is 0.85±0.03C%, 25-35 minutes; in this example, The carbon potential CP of the initial stage is 0.95C%, 10 m...

Example Embodiment

[0031] Embodiment two:

[0032] The heat treatment methods for carburizing and quenching of transmission gears include:

[0033] A. Carburizing step, put the gear into the material basket, and then put it into the sealed box-type multi-purpose heating furnace. The heating furnace is raised from room temperature to 900±5°C for carburizing, and the carburizing time is 3 to 4 hours; this embodiment Among them, the heating furnace was raised from room temperature to 900°C, and the carburizing time was 3 hours and 40 minutes. After heating up to 900±5℃, pass methanol and propane into the heating furnace and start carburizing. The carburizing is divided into initial stage, strong infiltration stage and diffusion stage; among them: the carbon potential CP in the initial stage of carburizing is 0.95±0.03C%, 9-11 minutes;

[0034] The carbon potential CP of the intense carburizing stage is 1.06±0.03C%, 170-190 minutes; the carbon potential CP of the diffusion stage of carburizing is 0.85±0...

Example Embodiment

[0041] Embodiment three:

[0042] The heat treatment methods for carburizing and quenching of transmission gears include:

[0043] A. Carburizing step, put the gear into the material basket, and then put it into the sealed box-type multi-purpose heating furnace. The heating furnace is raised from room temperature to 900±5°C for carburizing, and the carburizing time is 3 to 4 hours; this embodiment Among them, the heating furnace was raised from room temperature to 900°C, and the carburizing time was 3 hours and 40 minutes. After heating up to 900±5℃, pass methanol and propane into the heating furnace and start carburizing. The carburizing is divided into initial stage, strong infiltration stage and diffusion stage; among them: the carbon potential CP in the initial stage of carburizing is 0.95±0.03C%, 9-11 minutes;

[0044] The carbon potential CP of the intense carburizing stage is 1.06±0.03C%, 170-190 minutes; the carbon potential CP of the diffusion stage of carburizing is 0.8...

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PUM

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Abstract

The invention relates to a processing method for a gear, especially to a processing technology for a gearbox gear. The processing technology comprises the following steps: step 1, blanking and forging so as to obtain a cylindrical blank; step 2, homogenization treatment of components of the forged blank and drilling of a center hole through lathing; step 3, gear hobbing out of the cylindrical blank via a hobbing machine; step 4, carbonization of a workpiece; step 5, cooling and quenching after carbonization; and step 6, machining of the workpiece so as to form the gear. The processing technology provided by the invention has the following beneficial effects: a, carburizing temperature and quenching temperature are reduced, carburizing time is not prolonged, and energy consumption is reduced; b, generation of a black structure is prevented, a uniform carburizing layer is obtained, the microstructure of the carburizing layer having undergone carbonization and quenching is improved, an optimal metallographic structure is obtained, and thus, surface hardness, wear resistance and fatigue resistance of the gear are obviously improved; and c, deformation is reduced, gear processing and assembling dimension precision of the gear is improved, gear transmission balance is enhanced, noise is reduced, and the service life of the gear is prolonged.

Description

technical field [0001] The invention relates to a gear processing method, in particular to a high-power and high-toughness marine gear processing technology. Background technique [0002] Gearbox gear is one of the most technically demanding components. During the operation of the gears, the gears meshing with each other [0003] There are both rolling and sliding between the tooth surfaces, and the gears are also subjected to pulse stress and alternating bending stress. Therefore, the gears are required to undergo heat treatment to have good hardness, wear resistance, fatigue resistance, high dimensional accuracy, and smooth operation. Medium to low noise performance. [0004] Carburizing and quenching and carbonitriding are the most important heat treatment methods for surface strengthening of gearbox gears. In the existing carburizing and quenching, the carburizing temperature is usually 920-940°C, and the carburizing carburizing potential CP is usually 1.0-1.2C%, in or...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C8/26B23P15/14
Inventor 陈丽丽
Owner SUZHOU LU LU SHUN ELECTRICAL EQUIP
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