Automobile transmission gear and heat treatment process thereof
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A technology for automobile gearboxes and gears, applied in heat treatment furnaces, heat treatment equipment, belts/chains/gears, etc., which can solve problems such as starting jitter, gear wear, and gear impact.
Active Publication Date: 2016-12-14
SUZHOU LIDE PRECISION IND
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Summary
Abstract
Description
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Problems solved by technology
In addition to the normal wear and tear of the gears, the quality of the lubricating oil, poor lubrication conditions, improper driving operation, and improper gnawing positions of the gear assemblies during maintenance will all cause gear impacts, poor gear teeth gnawing, and starting vibrations. etc. will accelerate the wear and damage of the gear
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Effect test
Embodiment 1
[0068] The mass percentage composition of the automobile transmission gear of this embodiment is: C: 0.79%, Cr: 0.78%, Si: 0.22%, Mn: 0.68%, Zn: 1.35%, Cu: 1.26%, Ag: 0.15%, Au : 0.07%, Pt: 0.04%, Ni: 3.46%, W: 0.59%, Mo: 0.01%, Nd: 0.01%, Ce: 0.03%, Eu: 0.02%, Lu: 0.02%, Ti: 4.89%, Als : 0.018%, S≤0.005%, P≤0.007%, N≤0.007%, talcum powder: 0.23%, magnesiumoxide: 0.21%, the balance is Fe;
[0069] Its heat treatment process is:
[0070] (1) Heating: Heat the gear of the automobile gearbox to 620°C and keep it warm for 35 minutes;
[0071] (2) Cooling: Use air cooling to accelerate the cooling of the automotive gearbox gear to 445 °C at a cooling rate of 11 °C / s, and then air cool to room temperature;
[0072] (3) One-time tempering: heat the gear of the automobile gearbox to 550°C and temper for 45 minutes, wait for 22 seconds to make the temperature of the gear of the automobile gearbox uniform, and then accelerate cooling to 429°C at a cooling rate of 29°C / s, and then air...
Embodiment 2
[0087] The mass percentage composition of the automobile gearbox gear of this embodiment is: C: 0.85%, Cr: 1.13%, Si: 0.24%, Mn: 0.83%, Zn: 1.55%, Cu: 1.36%, Ag: 0.15%, Au : 0.08%, Pt: 0.06%, Ni: 3.58%, W: 0.65%, Mo: 0.01%, Nd: 0.03%, Ce: 0.04%, Eu: 0.04%, Lu: 0.03%, Ti: 5.13%, Als : 0.035%, S≤0.005%, P≤0.007%, N≤0.007%, talcum powder: 0.26%, magnesiumoxide: 0.24%, the balance is Fe;
[0088] Its heat treatment process is:
[0089] (1) Heating: Heat the gear of the automobile gearbox to 625°C and keep it warm for 40 minutes;
[0090] (2) Cooling: Use air cooling to accelerate the cooling of the automotive gearbox gear to 450 °C at a cooling rate of 13 °C / s, and then air cool to room temperature;
[0091] (3) One-time tempering: After heating the gear of the automobile gearbox to 557°C and tempering for 47 minutes, wait for 25 seconds to make the temperature of the gear of the automobile gearbox uniform, and then accelerate cooling to 432°C at a cooling rate of 35°C / s, and t...
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Abstract
The invention relates to an automobile transmission gear. Constituents of the automobile transmission gear comprise C, Cr, Si, Mn, Zn, Cu, Ag, Au, Pt, Ni, W, Mo, Nd, Ce, Eu, Lu, Ti, Als, S, P, N, talcum powder, magnesiumoxide and the balance Fe. Anti-rust performance and abrasion resistance of the automobile transmission gear are improved, and meanwhile, impacttoughness and fatigue strength of the gear are not reduced; in addition, the service life of the automobile transmission gear can be prolonged; and meanwhile, the automobile transmission gear can have the antistatic property, the heat absorption and insulation properties and surface water repellency.
Description
technical field [0001] The invention relates to an automobile transmission gear and a heat treatment process thereof, belonging to the technical field of automobile accessories. Background technique [0002] The gearbox mainly refers to the gearbox of the car. It is divided into manual and automatic. The manual transmission is mainly composed of gears and shafts, and the variable speed and torque are generated through different gear combinations; while the automatic transmission AT is composed of a hydraulic torque converter, a planetary gear and a hydraulic controlsystem. Variable speed and torque are achieved through hydraulic transmission and gear combination. However, whether it is a manual transmission or an automatic transmission, transmission gears are required. [0003] Transmission gears often work at high speeds, high loads, and constant alternation of speeds and loads. In addition to the normal wear and tear of the gears, the quality of the lubricating oil, po...
Claims
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Application Information
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