SCANIA Leaf Spring

SCANIA Leaf Spring

Automotive leaf springs are also called blade springs.

Round springs are used for suspension springs and motorcycle shock springs in cars and some mini-cars and vans, and the steel grades are 60Si2MnA, 55CrSi (SUP12), 50GrVA and other grades. The car has a total of 4 suspension springs, 2 in front and 2, generally the diameter of the front is slightly smaller than the diameter of the back, and the diameter used by each model is different, and the specification range is 9~16mm.

LZ111-2 microtruck automotive leaf spring rear assembly 4 pieces.

The minivan suspension spring steel plate uses high-grade spring steel plate. It is required to have high strength, long fatigue life, good shock absorption and other properties, so the chemical composition, number and morphological distribution of inclusions, surface quality, decarburization layer, microstructure and mechanical properties of spring steel wire rod are high. Suspension springs require a surface decarburization layer less than 0.5% of the diameter, a polished surface, long fatigue life, strict dimensional tolerances, and defect-free delivery.

Generally, it is difficult to meet user requirements by using the usual thermal processing method. Therefore, the spring for the screw suspension of the car gradually changed from hot forming to cold forming, and after drawing and heat treatment (martensitic structure obtained by quenching and tempering treatment), coil springs were made. The development direction of suspension spring steel plate is to reduce carbon content, reduce decarburization tendency, improve plastic formability and elastic attenuation resistance.