3 Aluminum alloy material processing technology of bicycle frame
For the processing of bicycle frame aluminum alloy materials, the choice of technology should pay attention to the influence of related process parameters on frame hardness, tensile strength, elongation, etc.
3.1 Process parameters and frame hardness
Through the adjustment of the solution temperature, time, effective temperature, and effective time, the influence of the four factors on the hardness of the frame is analyzed, and it is found that the solution temperature and time have the most significant effect on the hardness of the material.
When the mass fraction of Mg is 0.8-1.2%, Si is 0.4-0.8%, Cu is 0.15-0.4%, Cr is 0.04-0.35%, Mn and Ti<0.15%, the solution temperature is controlled at 510℃, water The quenching time is controlled at 3h, and then kept at 170℃ for 4h and air-cooled. At this time, the hardness of the frame can reach the highest.
3.2 Process parameters and tensile strength
Through the adjustment of solution temperature, time, effective temperature and effective time, the influence of four factors on the tensile strength of the frame is analyzed, and it is found that the influence of solution temperature and aging temperature on the tensile strength of the material is the most significant.
When the mass fraction of Mg is 0.8-1.2%, Si is 0.4-0.8%, Cu is 0.15-0.4%, Cr is 0.04-0.35%, Mn and Ti<0.15%, the solution temperature is controlled at 510℃, The water quenching time is controlled at 3h, and then it is kept at 170℃ for 4h and air-cooled. At this time, the tensile strength of the frame can reach the highest.
3.3 Process parameters and elongation
By adjusting the solution temperature, time, effective temperature, and effective time, the influence of four factors on the elongation of the frame is analyzed, and it is found that the aging time and the solid solution temperature have the most significant effect on the elongation of the material.
When the mass fraction of each element in the frame aluminum alloy material, as well as the solution temperature, heat preservation water quenching time, air cooling time, etc., are the same as the above parameters, the elongation of the frame can also reach the highest. in conclusion:
In aluminum alloy materials, the increase in Si, Cu, and Mn content can effectively enhance the strength of the frame. The Si mass fraction is controlled at 0.4-0.8%, the Cu mass fraction is controlled at 0.15-0.4%, and the solution temperature is controlled at 510℃ , The heat preservation water quenching time is controlled at 3h, and the heat preservation is 4h air cooling at 170℃ can maximize the strength, hardness, tensile strength and elongation of the aluminum alloy material. The use of this processing technology can effectively enhance the performance of the bicycle , Extend its service life.
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