Ngokwezimo ezihlukene, izinto zensimbi zishiswa ekushiseni okufanelekile futhi zigcinwe zifudumele, bese zipholile ngezindlela ezahlukene ukuze kushintshwe isakhiwo se-metallographic sensimbi futhi sithole izakhiwo ezidingekayo zesakhiwo. Le nqubo ngokuvamile ibizwa ngokuthi ukwelashwa kokushisa kwensimbi. Yiziphi izinqubo ezintathu ezifakiwe ekwelapheni ukushisa kwamashubhu e-carbon steel?

Ukwelashwa kokushisa kwezinto zensimbi kuhlukaniswe ukwelashwa kokushisa okuphelele, ukwelashwa kokushisa okungaphezulu kanye nokwelashwa kokushisa kwamakhemikhali. Ukwelashwa kokushisa kwamashubhu ensimbi engenamthungo ngokuvamile kusebenzisa ukwelashwa kokushisa sekukonke.

Amapayipi ensimbi kudingeka adlule ezinqubweni eziyisisekelo ezifana nokufudumeza, ukugcinwa kokushisa nokupholisa ngesikhathi sokwelashwa kokushisa. Kulezi zinqubo, amapayipi ensimbi angase abe neziphambeko zekhwalithi. Ukukhubazeka kokwelashwa kwamapayipi ensimbi ikakhulukazi kuhlanganisa isakhiwo esingafanelekile nokusebenza kwamapayipi ensimbi, ubukhulu obungafanelekile, ukuqhekeka kwendawo, imihuzuko, i-oxidation enzima, i-decarburization, ukushisa ngokweqile noma ukushisa ngokweqile, njll.

Inqubo yokuqala yokwelashwa kwe-carbon steel tube ukushisa ukushisa. Kunamazinga okushisa amabili ahlukene: enye iwukushisa ngaphansi kwendawo ebucayi i-Ac1 noma i-Ac3; enye ishisa ngaphezu kwephoyinti elibalulekile i-Ac1 noma i-Ac3. Ngaphansi kwalawa mazinga okushisa amabili okushisa, ukuguqulwa kwesakhiwo sepayipi yensimbi kuhluke ngokuphelele. Ukushisa ngaphansi kwephuzu elibalulekile i-Ac1 noma i-AC3 ngokuyinhloko ukuzinzisa isakhiwo sensimbi nokuqeda ukucindezeleka kwangaphakathi kwepayipi yensimbi; ukushisisa ngenhla kwe-Ac1 noma i-Ac3 ukwenza insimbi ibe yi-austenitize.

Inqubo yesibili yokwelashwa kokushisa kwe-carbon steel tube ukugcinwa kokushisa. Inhloso yayo iwukufanisa izinga lokushisa lokushisa kwepayipi lensimbi ukuze uthole isakhiwo sokushisa esinengqondo.

Inqubo yesithathu yokwelashwa kokushisa kwe-carbon steel tube ukupholisa. Inqubo yokupholisa iyinqubo eyinhloko yokwelashwa kokushisa kwepayipi lensimbi, enquma isakhiwo se-metallographic kanye nezakhiwo zemishini zepayipi lensimbi ngemva kokupholisa. Ekukhiqizeni kwangempela, kunezindlela ezihlukahlukene zokupholisa zamapayipi ensimbi. Izindlela zokupholisa ezisetshenziswa kakhulu zihlanganisa ukupholisa isithando somlilo, ukupholisa umoya, ukupholisa uwoyela, ukupholisa i-polymer, ukupholisa amanzi, njll.