I-Annealing Engaphelele & Ne-Spheroidizing Annealing Yokusakaza Kwensimbi

Ukufakwa okungaphelele kwe-Metal Castings

Incazelo:

I-annealing engaphelele yi-ainqubo yokwelapha ukushisa for castings steel, okuhlanganisa ukushisisa insimbi ebangeni lokushisa eliphakathi kwe-Ac1 ne-Ac3 (yensimbi ye-hypoeutectoid) noma i-Ac1 ne-Accm (yensimbi ye-hypereutectoid), ukuyipholisa ngesilinganiso sokupholisa esihamba kancane esingaphansi kuka-50 ℃/h ngemva kokuyibamba kuze kube yilapho izinga lokushisa lehla. ngaphansi kuka-500 ℃ bese uyikhipha esithandweni ukuze ipholise umoya. Le nqubo ihlose ukuthola isakhiwo esiseduze nesimo sokulingana.

Izici ze-Austenitization:

Njengoba izinga lokushisa lokushisa lisendaweni yezigaba ezimbili, isakhiwo sensimbi asiguqulwa ngokuphelele sibe yi-austenite. Ingxenye ye-pearlite kuphela eyenza ukuguqulwa kwesigaba kanye ne-recrystallization, iguqule ibe yi-austenite, kuyilapho i-morphology nokusabalalisa kwe-proeutectoid ferrite noma i-cementite ihlala ingashintshiwe.

Isicelo:

I-annealing engaphelele isetshenziswa kakhulu njengendlela yokwelapha ngaphambi kokucisha insimbi ye-hypereutectoid, futhi ukusetshenziswa kwayo kunsimbi ye-hypoeutectoid akuvamile.

 

I-Spheroidizing annealing ye-Metal Castings

Incazelo:

I-Spheroidizing annealing iyinqubo ethile yokwelapha ukushisa okuhloswe ngayo ukwenza ama-carbides ngendlela yensimbi eyindilinga eyizinhlayiya, ngaleyo ndlela kutholwe ukwakheka kwe-pearlite eyimbudumbudu. Eqinisweni, kuwuhlobo oluthile lokudonsa okungaphelele.

Isicelo:

Le nqubo isetshenziselwa ikakhulukazi insimbi ye-eutectoid, insimbi ye-hypereutectoid kanyeingxubevange ithuluzi steel castings, okuhloswe ukunciphisa ubulukhuni bezinto ezibonakalayo, ukuthuthukisa ukusebenza kokusika, ukuqinisekisa ukwakheka okufanayo, ukwandisa ukusebenza kwenqubo yokushisa ukushisa, nokubeka isisekelo esihle senhlangano senqubo yokucisha elandelayo.

Imininingwane yenqubo:

Izinga lokushisa lokushisa lidinga ukulawulwa ngokunembile, ngokuvamile libe phezulu kancane kunezinga lokushisa le-Ac1 ngo-20 kuya ku-30 ​​°C, futhi indlela yokushisisa isithando somlilo iyamukelwa.

Isikhathi sokubamba akufanele sibe side kakhulu, ngokuvamile sigcinwa phakathi kwamahora angu-2 no-4.

Kunezindlela ezihlukahlukene zokupholisa, kodwa ukupholisa isithando somlilo noma ukwelashwa kwe-isothermal yesikhathi eside cishe ku-20 °C ngaphansi kwe-Ar1 kuyindlela evamile.

Isihluthulelo se-spheroidizing annealing siwukuqinisekisa ukuthi inani elanele lamaphoyinti e-carbide angancibilikisiwe agcinwa ku-austenite, okuholela ekusabalaliseni okungalingani kokugxiliswa kwekhabhoni ukuze kuthuthukiswe i-spheroidization yama-carbides.

Ukushisa ezingeni eliphezulu kakhulu lokushisa noma ukubamba isikhathi eside kakhulu kuzobangela inani elikhulu lama-carbides ukuthi lincibilike, kwakheka i-austenite efanayo, kunciphisa umgogodla we-spheroidization futhi kuthinte umphumela we-spheroidization.

Ukuma nobukhulu bezinhlayiya ze-cementite kuthinteka izinga lokupholisa noma izinga lokushisa le-isothermal. Ukupholisa okusheshayo noma izinga lokushisa eliphansi le-isothermal livame ukwakha ama-carbides angenalutho, okuholela ekwandeni kokuqina.