Zifukwa kuuma kwa kulowetsedwa anaumitsa mbali sizikukwaniritsa zofunikira zaukadaulo

1. Kutentha kozimitsa sikokwanira

Ndiko kuti, kutentha sikukwanira ndipo kutentha kwa austenitizing sikumafika. Kwa sing’anga mpweya structural zitsulo, pali undissolved ferrite mu austenite, ndipo pali undissolved ferrite mu dongosolo kuzimitsidwa kupatula martensite, ndi kuzimitsidwa pamwamba pa workpiece nthawi zambiri buluu. Zitha kuwonekanso kuchokera pamawonekedwe a induction zolimba kuti malo ozizimitsidwa bwino ndi beige, ndipo pamwamba pawotentha kwambiri ndi oyera.

2. Kuzizira kosakwanira

Ndiye kuti, kuziziritsa kumakhala kotsika kwambiri kuposa kuzizira kofunikira. Mu dongosolo lozimitsidwa, kuwonjezera pa gawo la martensite, palinso tortenite, ndipo kuchuluka kwa tortenite kumachepetsa kuuma. Nthawi zambiri zimachitika pamene ndende ya quenching sing’anga, kutentha, kuthamanga kusintha ndi madzi jekeseni dzenje watsekedwa.

3. Kutentha kodziletsa ndikokwera kwambiri

Vuto la kutentha kwambiri kwadzidzidzi kumachitika pozimitsa shaft, yomwe nthawi zambiri imachitika pozimitsa shaft yopingasa kapena kuzimitsa kwa shaft yoyima. Pamene m’lifupi la jet yamadzimadzi ndi lalifupi, kutentha pamwamba kumadutsa mwamsanga jet yamadzimadzi ndipo sikumazizira gawo lozimitsira mokwanira, ndipo kutuluka kwa madzi kumatsekedwa ndi masitepe (gawo lalikulu la mainchesi lili pamwamba, gawo laling’ono laling’ono). ili pansi), ndipo gawo lozimitsidwa silingapitirize kukhazikika. Chotsatira chake, kutentha kwadzidzidzi komwe kumawonekera nthawi zambiri kumawonedwa ndikuzindikiridwa pamtunda wozimitsidwa.

4. Malo ofewa kapena lamba wakuda wozungulira

Mawanga ofewa ndi midadada pamalo ozimitsidwa nthawi zambiri amakhala akuda, ndipo lamba wakuda wozungulira ndi vuto lodziwika bwino pakusanthula ziwalo zozimitsidwa. Gulu lakuda ili limatchedwanso gulu lofewa, ndipo nthawi zambiri limapangidwa ndi tortite. Njira yothetsera vutoli ndikupopera madziwo mofanana, ndipo kuonjezera kuthamanga kwa makina ogwira ntchito kungathenso kuchepetsa phula la lamba wakuda, koma chofunika kwambiri ndi chakuti mapangidwe a sprayer amadzimadzi amayenera kupangitsa kuti kutentha kuzikhala bwino mofanana. Mabowo otsekeka a jet nthawi zambiri amakhala chimodzi mwazomwe zimayambitsa mawanga ofewa.

5. Chikoka cha zinthu mankhwala zikuchokera

Kuchepetsa kwa zinthu, makamaka zomwe zili mu kaboni, ndi chimodzi mwazinthu zomwe zimachepetsa kuuma. Ngati ndi kotheka, zomwe zasankhidwa kaboni zingagwiritsidwe ntchito pazinthu zofunika, kotero kuti malire apamwamba ndi otsika a w (C) akhoza kuchepetsedwa mpaka 0.05%.

6. Kukonzekera kutentha mankhwala

Kusintha kwa njira yozimitsira ndi kutenthetsa, ndipo khungu lakuda la zinthu zozunguliridwa limakhalabe pamtunda wozimitsira ndi zifukwa zomwe kuuma kwa mbali zowuma za induction sikukwaniritsa zofunikira zaumisiri.

7. Kuwotcha pamwamba ndi decarbonization

Nthawi zambiri zimachitika pamwamba pa zipangizo zozizira. Chifukwa chake, mutatha kuzimitsa mipiringidzo iyi, wosanjikiza wakunja ukhoza kudulidwa ndi 0.5mm musanawume. Ngati kuuma kwa pamwamba kuli kochepa, kuuma kwamkati kwamkati kumakhala kokwera kuposa pamwamba, kusonyeza kuti pali mpweya wa carbon-depleted kapena decarburized layer. (kupatulapo ma geometries apadera monga cam lobes, nsonga zamagiya).

8. Minofu ya riboni yachikale

Chomangira chomangirira m’mapangidwe oyambirira a gawo lozimitsidwa chidzatsogolera kuuma kosakwanira pambuyo pozimitsa. Pali ferrite yosasunthika muzitsulo zomangika, zomwe sizingasungunuke panthawi ya austenitization, ndipo kuuma pambuyo pozimitsa kuyenera kukhala kosakwanira, ndipo mapangidwe a banded ndi ovuta kuthetsa ngakhale kutentha kwa kutentha kukuwonjezeka.