Halayen zafin karfe a ciki shigowa dumama tanderu

Tsarin dumama mai taurin karfe mai sauri ya bambanta da ƙarfe na gargajiya na gargajiya, kuma tsarin zafin jiki yana nuna halaye masu zuwa.

Maganin zafin jiki na induction dumama tanderun bai dace da ƙarancin zafin jiki don samun tsarin martensite mai zafi ba. A gargajiya tempering tsari za a iya za’ayi a high zafin jiki (500 ~ 650 ° C), matsakaicin zafin jiki (350 ~ 500 ° C) da ƙananan zafin jiki (150 ~ 250 ° C). C) Nau’u uku na maganin zafin rai. Induction dumama tanderun ya dace da babban zafin jiki da matsakaicin zafin jiki, bai dace da ƙarancin zafin jiki ba. Wannan saboda lokacin da aka aiwatar da tanderun dumama induction a zafin jiki na 150 ~ 250 ° C, yana da wuya a gane yanayin zafin jiki na diathermy na kayan ƙarfe. Saboda ƙananan zafin jiki na zafi, ƙananan yanayin zafi tsakanin farfajiya da tsakiya, da kuma jinkirin canja wurin zafi, yana ɗaukar lokaci mai tsawo don diathermy don daidaita yanayin zafi, wanda a ƙarshe yana haifar da raguwa a cikin aikin zafi. Sabili da haka, maganin zafin jiki na induction dumama tanderun ba zai iya samun tsarin martensite mai zafi ba, kuma zafin jiki yana sama da ma’ana. A halin yanzu, zafin jiki na induction dumama tanderun don waya karfen bazara na iya kaiwa ƙasa da 400 ° C.

Tanderun dumama shigar da wutar lantarki yana da babban zafin jiki, babban matakin zafi, da ɗan gajeren lokacin riƙewa. Don haɓaka canjin tsarin da kuma rage lokacin riƙewa, da kuma fahimtar manufar zafin jiki, zafin jiki na induction dumama tanderun yana da girma fiye da yanayin zafi na dumama na gargajiya. Tebur 4-23 yana nuna tasirin kwatancen tsarin zafin jiki na induction dumama tanderun don ƙara yawan zafin jiki da rage lokacin riƙewa da tsarin dumama da zafin jiki na gargajiya. Bayanan da ke cikin Tebur 4-23 sun nuna cewa don samun 35CrM iri ɗaya. Ƙaƙƙarfan zafin ƙarfe, zafin jiki na dumama shigar da shi daidai ya fi na gargajiya dumama da zafin jiki ta 190 ~ 250 ° C. Ƙara yawan zafin jiki don musanya don rage lokacin riƙewa, ya rage daga 1800s zuwa 40s. Wannan yana nuna halayen saurin jiyya na zafi a cikin induction dumama tanderun. Dalilin da yasa za’a iya canza zafin tanderun dumama induction ta yanayin zafi shine galibi saboda zafin jiki shine babban ƙarfin motsa jiki don haɓaka canjin tsarin. Ƙara yawan zafin jiki zai iya hanzarta canza tsarin, wanda ya fi tasiri fiye da tsawaita lokacin riƙewa. Wani dalili shi ne cewa kwanciyar hankali na tsarin martensite na induction dumama tanderun da aka kashe karfe ya fi na gargajiya quenched martensite tsarin, kuma yana da sauƙin canzawa.

Table 4-23 Dangantakar da ke tsakanin taurin da zafin jiki na 35CrMo karfe quenched da tempered

(3) Kwanciyar hankali na tsarin zafin wuta na induction dumama tanderun ba shi da kyau. Saboda induction dumama tanderu yana amfani da hanyar zafi mai zafi ba tare da adana zafi ba, canjin tsarin bai isa ba, don haka kwanciyar hankalinsa ba shi da kyau. Ba za a iya amfani da wannan hanyar zafin ba don karafa da ke buƙatar aiki na dogon lokaci a yanayin zafi mai zafi, kamar ƙananan ƙarfe don tukunyar wutar lantarki.