I-Sinter iyaqina ku-MIM

Yini i-Sinter Hardening?

Ukuqina kwe-Sinter kuyinqubo ekhiqiza ukuguqulwa kwe-martensite phakathi nesigaba sokupholisa somjikelezo we-sintering.

Yilokho ukushisa nokushisa kwe-powder metallurgy materials kuhlanganiswe ibe inqubo eyodwa, ukuze inqubo yokukhiqiza impahla iphumelele futhi izinzuzo zezomnotho zithuthukiswe.

Izici zokuqina kwe-sinter:

1) Ipulasitiki yensimbi ithuthukiswa kakhulu.Esikhathini esedlule, ama-alloys asekelwe ku-nickel ayengakhiwa kuphela ngokusakazwa kodwa angakwazi ukwakhiwa ngokufojitha angabuye akheke nge-sinter hardening die forging, ngaleyo ndlela andise izinhlobo zezinsimbi ezifohlwayo.

2) Ukumelana ne-deformation yensimbi kuncane kakhulu.Ngokuvamile, ingcindezi ephelele ye-sinter-hardening die forging iyingxenyana eyodwa kuphela kwengxenye eyodwa kwezishumi yaleyo ye-die forging evamile.Ngakho-ke, i-die forging emikhulu ingenziwa kumishini ene-tonnage encane.

I-3) Ukunemba okuphezulu kokucubungula i-Sintering ukuqina kokwenza ukucubungula kungathola izingxenye ezinodonga oluncane ezinosayizi oqondile, ukuma okuyinkimbinkimbi, ukwakheka okusanhlamvu okufanayo, izakhiwo ezifanayo zemishini, isibonelelo esincane somshini, futhi singasetshenziswa ngisho nangaphandle kokusika.Ngakho-ke, ukwakheka kwe-sinter-hardening kuyindlela entsha yokufeza ukusika okuncane nokunemba nokunemba.

Izinto ezinomthelela wokuqina kwe-sinter ikakhulukazi zifaka:Izakhi ze-alloying, izinga lokupholisa, ukuminyana, okuqukethwe kwekhabhoni.

Izinga lokupholisa lokuqiniswa kwe-sinter ngu-2~5℃/s, futhi izinga lokupholisa lishesha ngokwanele ukubangela ukuguqulwa kwesigaba se-martensite kokubalulekile.Ngakho-ke, ukusetshenziswa kwenqubo yokuqina kwe-sinter kungasindisa inqubo yokungcwaba elandelayo.

Ukukhetha Okubalulekile:
Ukuqina kwe-sinter kudinga impushana ekhethekile.Ngokuvamile, kunezinhlobo ezimbili zensimbi-based powder metallurgy materials, okuyilezi:

1) I-Elemental powder exutshwe impushana, okungukuthi, i-powder exubile eyenziwe nge-elemental powder exutshwe ne-iron powder ehlanzekile.Okuvame ukusetshenziswa kakhulu i-alloying element powders yi-graphite powder, i-copper powder kanye ne-nickel powder.Ukusabalalisa ngokwengxenye noma ukwelashwa okunamathelayo kungasetshenziswa ukuhlanganisa impushana yethusi kanye nempushana ye-nickel ezinhlayiyeni eziyimpushana yensimbi.

I-2) Yimpushana yensimbi ephansi esetshenziswa kakhulu ekuqiniseni i-sinter.Ekulungiseni lezi zimpushana zensimbi ezine-alloy ephansi, izakhi ze-alloying manganese, i-molybdenum, i-nickel ne-chromium zengezwa.Uma kubhekwa iqiniso lokuthi izakhi ze-alloying zincibilika ensimbi, ukuqina kwezinto ezibonakalayo kuyanda, futhi i-microstructure yezinto ezibonakalayo emva kokugcoba ifana.