Automobile steering knuckle forging process
A technology of automobile steering knuckle and process, which is applied in the direction of vehicle parts, railway car body parts, transportation and packaging, etc. It can solve the problems of difficult filling, uneven distribution, and hypertrophy of forgings between forgings, so as to achieve increased strength, low cost, Solve the effect of rough edges
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Embodiment 1
[0026] The process is carried out in eight steps. Firstly, (1) blanking: it is divided into four steps: rough cleansing, impurity removal, fine cleansing and feeding. The tool used in the rough cleansing process is sandpaper, and the material used in the impurity removal process is 35% dilute sulfuric acid, the material used in the fine cleansing process is washed twice with 100ml distilled water, and then (2) preliminary heating: heat to 450°C at a heating rate of 50°C / h and keep it for 30 minutes, then Carry out (3) billet making: including two steps of air filtration and temperature rise, wherein the gas used for air filtration is nitrogen, and the temperature rise process is heated to 490°C at a heating rate of 10°C / h, and kept for 30 minutes, and then carried out ( 4) Subsequent heating: Heating to 520°C at a heating rate of 5°C / h, and keeping it for 20 minutes, and then performing (5) bending and final forging, using a 3T die forging hammer, and then performing (6) hot tr...
Embodiment 2
[0028] Repeat Example 1 according to the same steps as described, the difference is: the material used in the impurity removal process in step (1) is 37.5% dilute sulfuric acid, the material used in the fine cleansing process is 125ml distilled water rinsed 3 times, and the step ( In 2), heat up to 475°C at a heating rate of 55°C / h and keep it for 35 minutes; in step (3) heat up to 500°C at a heating rate of 15°C / h and keep it for 35 minutes, then Carry out (4) subsequent heating: heat to 523°C at a heating rate of 8°C / h, and keep it for 20-40 minutes, adjust the temperature to 533°C in the temperature adjustment process in step (6), and normalize in step (7) Process heating to AC 3 Above 50°C and keep for 2h.
Embodiment 3
[0030] Repeat Example 1 according to the same steps described, the difference is: the material used in the impurity removal process in step (1) is 38% dilute sulfuric acid, the material used in the fine cleansing process is 150ml distilled water rinsed 4 times, the step ( In 2), heat up to 480°C at a heating rate of 60°C / h and keep it for 40 minutes. In step (3), heat up to 510°C at a heating rate of 20°C / h and keep it for 40 minutes. Carry out (4) subsequent heating: heat to 525°C at a heating rate of 10°C / h, and keep it for 40 minutes, adjust the temperature to 535°C in the temperature adjustment process in step (6), and adjust the temperature to 535°C in the normalizing process in step (7) Heat to AC 3 Above 60°C and keep for 4h.
[0031] Test items Example 1 Example 2 Example 3 Standard Premium Compressive strength (MPa) 1500 1620 1340 1360 Coefficient of friction (mm) 0.20 0.28 0.25 0.18 Elastic modulus (MPa) 4.3×10 -- --- 5 4....
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