40cr izici 40cr injongo eyinhloko 40cr indlela yokushisa ukwelashwa

1. Isingeniso ku-40cr: Insimbi engu-40Cr iyinsimbi ye-medium-carbon modulated. I-normalizing ingakhuthaza i-spheroidization yesakhiwo futhi ithuthukise ukusika ukusebenza kokungenalutho ngobulukhuni obungaphansi kuka-160HBS. Ifudumeza ezingeni lokushisa elingu-550 ~ 570 ℃, insimbi inezinto ezingcono kakhulu eziphelele zemishini. Ukuqina kwale nsimbi kungaphezulu kwalokho kwensimbi engu-45, futhi ifanele ukwelashwa kokuqina kwendawo njengokucisha imvamisa ephezulu kanye nokucisha ilangabi.

Okwesibili, izici ezingu-40cr: insimbi ecishiwe ephakathi nendawo, insimbi eshisayo enesihloko esibandayo. Insimbi inenani elilinganiselwe futhi kulula ukuyicubungula. Ngemuva kokwelashwa okufanele kokushisa, izinga elithile lokuqina, ipulasitiki nokumelana nokugqoka kungatholakala. Isigaba esijwayelekile sikhuthaza i-spheroidization yesakhiwo futhi ifanele ukwelashwa kokuqina kwendawo efana nokucisha i-high-frequency kanye nokucisha ilangabi.

Okwesithathu, inhloso eyinhloko ye-40cr: i-half shaft namagiya, ama-shafts, izibungu, ama-spline shafts, imikhono ephezulu kumathuluzi omshini, njll; ngemva kokucisha nokushisa ezingeni lokushisa eliphakathi nendawo, isetshenziselwa ukwakha izingxenye ezimelana nomthwalo ophezulu, umthelela kanye nomsebenzi wejubane eliphakathi nendawo, njengamagiya, umkhono, shaft, shaft main, crankshaft, 182 spindle, 3666 pin, 3769 connecting rod, screw, i-nati, i-valve yokungenisa, njll. Ngaphezu kwalokho, lolu hlobo lwensimbi lufanele ukukhiqiza izingxenye ezihlukahlukene zokudlulisela ezithola ukwelashwa kwe-carbonitriding, njengamagiya nama-shaft anobubanzi obukhulu kanye nokuqina okuhle kwezinga lokushisa eliphansi.

Okune, 40cr ukwakheka kwamakhemikhali:

Ikhabhoni engu-0.37–0.45%, i-silicon 0.17–0.37%, manganese 0.5–0.8, chromium 0.8–1.1%

Ukuqina kwe-Annealing: ngaphansi kuka-207HBS

Ubulukhuni obujwayelekile: ngaphansi kuka-250HBS

Ezinhlanu, 40cr isimo sokulethwa: 40Cr isimo sokulethwa silethwa ngokuphathwa kokushisa (okujwayelekile, ukuthungatha noma ukushisa okuphezulu) noma ngaphandle kokwelashwa kokushisa. Isimo sokulethwa kufanele sikhonjiswe kunkontileka.

Isithupha, ukwelashwa kokushisa okungu-40cr: ukucisha ku-850 ℃, ukupholisa uwoyela; ukushisa ku-520 ℃, ukupholisa amanzi, ukupholisa uwoyela. Ubulukhuni bokucisha ubuso obungu-40Cr yi-HRC52-60, futhi ukucisha ilangabi kungafinyelela ku-HRC48-55.