Some aluminum profiles have surface cracks. What cause the cracks? There must be many people want to know it. Kaixin Aluminum will tell you below.
Aluminum extrusion temperature is too high, the tensile strength of the metal surface decreased, cracks occur under the action of friction.
Friction subjected the surface of the metal to additional stresses, when the adhesion stress is greater than the tensile strength of the surface metal will produce cracks.
When the extrusion speed of aluminum profile is too fast, the additional stress on the metal surface will cause the profile to crack.
Solution: strictly control the aluminum extrusion process parameters to ensure a reasonable export speed and export temperature.