Ukuqhathaniswa kwe-induction heat tempering kanye ne-furnace tempering

Uma kuqhathaniswa nokushisa esithandweni somlilo, ukufudumala kwe-induction tempering kunezinzuzo ezilandelayo:

1) Isikhathi sokushisa sifushane futhi umkhiqizo uphezulu. Izinga lokushisa lokushisa kwe-induction lokushisa okuphansi kwe-tempering yi-4-20T / s, izinga lokushisa lokushisa eliphakathi neliphezulu lokushisa okushisa yi-5-30Y / s, i-cylinder liner isebenzisa amandla okuvama kwamandla, izingcezu ezi-3 ngasikhathi sinye, nokushisa isikhathi se-220Y singama-30-40s.

2) Izici ezizinzile nezingcono zomshini zingatholakala.

Othile wenze izivivinyo ku- ukuqina kokungeniswa, Ukushisa kwe-induction kanye ne-tempering (IH), Ukushisa kwesithando somlilo kanye nokushisa (FH) kwemigoqo yensimbi ye-PC. Amapharamitha wezobuchwepheshe wezincazelo ezimbili zokwelashwa kokushisa akhonjiswa etafuleni.

Izinhlobo ezimbili zokwelashwa kokushisa okucacisiwe kwemingcele yobuchwepheshe

Imiphumela emibili yokuhlolwa ikhombisa ukuthi:

1) Ezindleleni ezimbili zokushisa, ubulukhuni besampula yensimbi yensimbi buyancipha ngokuhambisana nokwanda kwezinga lokushisa lokushisa.

2) Ukuze uthole ubunzima obufanayo bokushisa, amazinga okushisa we-IH yi-100-130 ℃ ephakeme kunaleyo ye-FH. Lo mehluko ungenzela ukusilela okubangelwe yisikhathi esifushane se-IH sokushisa.

I-3) Kusetshenziswa ukuhlaziywa kwe-X-ray diffraction, izingxenyana ezisindayo ze-austenite ezigcinwe ezilinganiswe ngamazinga aphezulu wokushisa wokungenisa kanye namasampuli wokushisa esithandweni jikelele abengu-4.3% no-3%, ngokulandelana, futhi ancipha kancane kancane ngokunyuka kwamazinga okushisa ashubile; kepha Ekushiseni okufanayo kwe-tempering, okuqukethwe okugcinwe kwe-austenite kwesampula se-IH kuphakeme kunalokho kwe-FH. Kumazinga okushisa we-400 ° C, ingxenyenamba yesisindo se-austenite egcinwe ku-FH ingaphansi kuka-1%, kanti endala ingu-2.7%. Lapho ithempelesha yokushisa ingaphansi kuka-600 ℃, ingxenyenamba yesisindo se-austenite egciniwe ngeke ibe ngaphansi kuka-1%. Umehluko kule nqubo yokushisa ngenxa yezindlela ezahlukahlukene zokushisa nakho kungenye yezimpawu zokushisa okungenayo.

I-4) Ubudlelwano phakathi kwendlela yokwelashwa kokushisa nezakhiwo zemishini. Ukuze uqhathanise izakhiwo zemishini yamasampula we-IH ne-FH, ubudlelwano phakathi kwamandla, ubungqingili, ukuqina nobulukhuni obutholwe ekuhlolweni okuhlukahlukene kwemishini kufingqiwe, futhi imiphumela imi kanje:

Amandla we-tensile, amandla we-yield namandla we-shear konke kukhuphuka ngokwanda kobulukhuni (umehluko phakathi kwe-IH ne-FH awumkhulu). Ngaphezu kwalokho, noma ngabe amaphethini wokucindezelwa komthwalo ehlukile, isilinganiso samandla we-shear namandla we-tensile siyahluka cishe ebangeni le-0.6 kuye ku-0.7, ngakho-ke umehluko kumkhuba wezinguquko ezahlukahlukene zamandla ubuye ube mncane kakhulu.

Kunoma ikuphi ukuqina, i-plasticity nobulukhuni besampula le-IH buphakeme kunobo besampula se-FH. Usebenzisa i-IH ukukhulisa isilinganiso sepulasitiki, ubude ngemuva kokuqhekeka ngu-10%, ukuncipha kwendawo ngama-30%, kanti okunye kuphakeme njengokufika ku-70%. Ngakho-ke, uma kuqhathaniswa nesampula le-FH, isampula le-IH linezinhlamvu ezinhle namandla amahle nokuqina. Ngemuva kokushisa okushisa okuphezulu, isampula iqukethe i-austenite egcinwe kakhulu, engathuthukisa ukubumbana nokuqina kwensimbi. ; Lapho ubulukhuni obufanayo bufana, i-IH iyashesha futhi iyashisa ngesikhathi esifushane, ngakho-ke ithempelesha layo lokushisa liphakeme kune-FH.

Ngamafuphi, ukusebenza kwesampula eliphathwe yi-IH kungcono kunalokho kwesampula se-FH. Kumele kuqashelwe ukuthi ngenxa yesikhathi esisheshayo nesifushane se-induction tempering, izinga lokushisa lokushisa liphakeme kakhulu kunokushisa esithandweni nge-100-130 ° C. Uma kuqhathaniswa nokushisa esithandweni somlilo, ukuzithiba kukhuphula izinga lokushisa kakhulu.