The half shaft is the main part for transmitting torque in automobiles and tractors. During the working process, the half shaft inevitably has to bear huge friction, so it wears out relatively quickly. For this reason, many manufacturers use medium frequency induction quenching equipment for heat treatment, with good results. Today, we will not talk about the induction hardening process of the half shaft, but we will talk about the determination of its parameters.
Determination of half shaft quenching process parameters:
1. Equipment: medium frequency induction quenching equipment and CNC quenching machine tools.
2. Process parameters
Use medium frequency, continuous heating and quenching cooling method.
Workpiece rotation speed: n=6-10r/min, part moving speed is 204-220mm/min, electrical parameters are detailed in the table below.
|
Project |
Parameter |
|
Treatment parts and areas |
φ50mm, φ54mm and φ55.8mm journals |
|
Medium frequency motor frequency/Hz |
8000 |
|
Medium frequency motor power/KW |
250 |
|
Transformer ratio |
20:1 |
|
No-load voltage/V |
325-350 |
|
Load voltage/V |
325-350 |
|
Load current/A |
220-240 |
|
Power factor |
0.95-1 |
|
Output power/KW |
60-80 |
|
Heating method |
Continuous |
|
Cooling |
Media |
10%-12%AQ-251 |
|
Temperature/°C |
20-40 |
|
Pressure/MPa |
0.04-0.06 |
|
Moving speed/(mm/s) |
5.5±0.5 |
|
Time/s |
Heating |
2.0+0.5 |
|
Intermittent interest |
0.6 |
|
Cooling |
35±5 |
Cooling medium: AQ-251 aqueous solution, concentration 10%-12%.
The quenching temperature is 860℃; the tempering temperature is 200-220℃.
3. The hardness after quenching is 51-56HRC.
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GS-ZP-1200
