1. Quenching When quenching and heating in a salt bath furnace, the springs should be evenly bundled with iron wires, or the springs should be heated on the mandrel. When heating, ensure that the surface of the spring is oxidized and decarburized. Salt baths should be carefully deoxygenated. It can also be heated in a box-type furnace with a controlled atmosphere. The heating temperature is 850 degree C ± 10 degree C, and the temperature is kept for 1015 minutes, and the quenching oil is cooled through the furnace.
2. Pjeskarenje je potrebno da bi se poboljšala zamorna čvrstoća opruge. Prečnik projektila je 0.30.5 mm. Kada se koristi ubrizgavanje komprimiranog zraka, tlak komprimiranog zraka je 0,40,5 MPa; sa centrifugalnim mlazom, linearna brzina projektila je 70m/s. Vek trajanja kompresijske opruge tretirane sačmarenjem može se više nego udvostručiti.
3. Nakon što je kompresiona opruga za rekristalizacijsko žarenje valjana i formirana, ona se mora rekristalizirati i žariti kako bi se stabilizirale geometrijske dimenzije opruge i smanjila deformacija tijekom gašenja. Temperatura rekristalizacijskog žarenja je 550650 stepeni, a temperatura se održava 11,5h, a zatim se hladi zrakom{4}}. Mala količina se može izvesti u peći sa slanom kupkom, a peć sa kontinuiranim otporom može se koristiti za kontrolu atmosfere u velikim količinama.
4. Tempering can be carried out twice after tempering and quenching. Correction and tempering should be carried out first. The temperature of correction and tempering should generally be lower than the final tempering temperature by about 20 degree , and the temperature should be kept for 10-15 minutes. The final tempering is then carried out, and after the spring size is corrected, the spring is mounted on the tempering jig for final tempering. The tempering fixture should ensure that the pitch and free length of the spring meet the requirements. The tempering temperature is 420 degree ±10 degree , the temperature is kept for 3035min, and the furnace is water-cooled.
