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. Tá gá le pléascadh lámhaigh chun neart tuirse an earraigh a fheabhsú. Is é an trastomhas teilgean ná 0.30.5mm. Nuair a bhíonn instealladh aer comhbhrúite á úsáid agat, is é 0.40.5MPa an brú aeir comhbhrúite; le pléascadh lámhaigh lártheifneoir, is é 70m/s treoluas líneach an diúracáin. Is féidir le saol seirbhíse an earraigh comhbhrú cóireáilte ag pléascadh lámhaigh a bheith níos mó ná dúbailt.
3. Tar éis an t-earrach comhbhrúite athchrystallization annealing a rolladh agus a fhoirmiú, ní mór é a athchriostalú agus a annealed chun toisí geoiméadracha an earraigh a chobhsú agus an dífhoirmiúchán a laghdú le linn múchadh. Is é 550650 céim an teocht annealaithe athchriostalaithe, agus coimeádtar an teocht ar feadh 11.5 uair agus ansin fuaraithear aer. Is féidir méid beag a dhéanamh i bhfoirnéis folctha salainn, agus is féidir foirnéis friotaíochta leanúnach a úsáid chun an t-atmaisféar a rialú i gcainníochtaí móra.
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.
