Izici zokufudumeza zensimbi ecishiwe isithando sokushisa sangaphakathi

Isakhiwo sokushisisa ngokushesha insimbi eqinile ihlukile kunensimbi yendabuko eqinile, futhi inqubo yokushisa ibonisa izici ezilandelayo.

Ukwelashwa okufudumele kwesithando sokushisa kwe-induction akufanelekile ukushisa okuphansi kwezinga lokushisa ukuze kutholwe isakhiwo se-martensite esishisayo. Inqubo yendabuko yokushisa ingenziwa ekushiseni okuphezulu (500 ~ 650 ° C), izinga lokushisa eliphakathi (350 ~ 500 ° C) kanye nezinga lokushisa eliphansi (150 ~ 250 ° C). C) Izinhlobo ezintathu zokwelapha zokuthambisa. Isithando sokushisa se-induction sifaneleka kuphela izinga lokushisa eliphezulu kanye nokushisa okuphakathi nendawo, akufanelekanga ukushisa okuphansi. Lokhu kungenxa yokuthi lapho isithando sokushisa sokungeniswa siqhutshwa ekushiseni kwe-150 ~ 250 ° C, kunzima ukuqaphela izinga lokushisa leyunifomu ye-diathermy yezinto zensimbi. Ngenxa yokushisa okuphansi kokushisa, umehluko omncane wokushisa phakathi kwendawo kanye nendawo, kanye nezinga lokudlulisa ukushisa kancane, kuthatha isikhathi eside ukuthi i-diathermy ilinganise izinga lokushisa, okuholela ekugcineni ekunciphiseni kokusebenza kahle kokushisa. Ngakho-ke, ukwelashwa okufudumele kwesithando sokushisa kwe-induction akukwazi ukuthola isakhiwo se-martensite esishisayo, futhi izinga lokushisa lokushisa lingaphezu kwephuzu. Njengamanje, izinga lokushisa elipholile lesithando sokushisa lokungeniswa kocingo lwensimbi yasentwasahlobo lingafinyelela ngaphansi kuka-400°C.

Isithando sokushisa sokungeniswa sinezinga eliphezulu lokushisa lokushisa, izinga elikhulu lokushisa ngokweqile, kanye nesikhathi esifushane sokubamba. Ukuze kusheshiswe ukuguqulwa kwesakhiwo futhi kufinyezwe isikhathi sokubamba, futhi uqaphele inhloso yokushisa, izinga lokushisa lokufudumala lesithando sokushisa lokungeniswa liphakeme kunezinga lokushisa lokushisa elivamile. Ithebula 4-23 libonisa umthelela wokuqhathanisa wenqubo yokushisa yesithando somlilo sokungeniswa ukuze kwandiswe izinga lokushisa elipholile futhi sifinyeze isikhathi sokubamba kanye nenqubo yokushisisa evamile neyokushisa. Idatha ekuThebula 4-23 ibonisa ukuthi ukuze uthole i-35CrM efanayo. Ubulukhuni bensimbi obushisayo, izinga lokushisa elipholileyo lokushisisa lokungeniswa liphakeme ngokulinganayo kunokushisa okungokwesiko kanye nezinga lokushisa elingu-190~250°C. Ukwenyusa izinga lokushisa elishisayo ngokushintshanisa ukunciphisa isikhathi sokubamba sokushisa, kufinyezwe kusuka kuma-1800 kuya ku-40s. Lokhu kubonisa izici zokwelashwa kokushisa okusheshayo ezithandweni zokushisa zokungeniswa. Isizathu sokuthi kungani ukushisa kwesithando sokushisa kwe-induction kungashintshwa ngokushisa ngokuyinhloko ngoba izinga lokushisa liyithonya eliyinhloko lokukhuthaza ukuguqulwa kwesakhiwo. Ukwandisa izinga lokushisa kungasheshisa ukuguqulwa kwesakhiwo, okusebenza kangcono kunokwelula isikhathi sokubamba. Esinye isizathu siwukuthi ukuzinza kwesakhiwo se-martensite yesithando somlilo sokungenisa induction insimbi ecishiwe yimbi kakhulu kunesakhiwo se-martensite sendabuko esicishiwe, futhi kulula ukuguqula.

Ithebula 4-23 Ubudlelwano phakathi kokuqina kanye nezinga lokushisa le-35CrMo elicishiwe futhi liqinile

( 3) Ukuzinza kwesakhiwo sokufudumeza kwesithando somlilo sokungeniswa akukuhle. Ngenxa yokuthi isithando sokushisa sokungenisa i-induction sisebenzisa indlela yokushisa ephezulu ngaphandle kokugcinwa kokushisa, ukuguqulwa kwesakhiwo akwanele, ngakho-ke ukuzinza kwayo akulungile. Le ndlela yokushisa ayikwazi ukusetshenziselwa izinsimbi ezidinga ukusebenza isikhathi eside emazingeni okushisa aphezulu, njengama-low-alloy steels ama-boilers esiteshini samandla.