Crankshaft yana daya daga cikin mahimman sassa a cikin injin konewa na ciki, kuma rayuwar sabis ɗinsa sau da yawa yana ƙayyade rayuwar sabis na injin konewa na ciki. A cikin 1920, Kamfanin Clark na Amurka ya yi amfani da fasahar tauraruwar induction wanda aka ƙirƙira kwanan nan don hardening mujallar crankshaft, wanda ya inganta juriya na crankshaft, ta haka inganta rayuwar aiki na injin konewa na ciki.

A cikin 'yan shekarun nan, raunin gajiya na crankshaft ya zama mafi shahara, kuma tushen gajiya galibi yana faruwa a kusurwoyi masu zagaye na crankshaft na mujallar haɗin gwiwa. A saboda wannan dalili, masana'antun da yawa sun ba da shawarar buƙatun don inganta ƙarfin gajiya na crankshaft. Makullin inganta ƙarfin gajiyar crankshaft shine ƙara ragowar damuwa na crankshaft fillet. Ƙunƙarar ƙaddamarwa na crankshaft fillet (ciki har da mujallu) ita ce hanyar da aka fi so don samun manyan matsalolin matsawa na> 600MPa don fillet. Wani kamfani na kasar Japan ya gudanar da gwaje-gwajen lankwasawa da yawa akan injin konewa na ciki. Gwajin ya tabbatar da cewa induction taurare crankshaft yana da mafi girman ƙarfin gajiya (996MPa), ƙarfin gajiya mai jujjuyawar crankshaft shine na biyu (890MPa), kuma nitrided crankshaft shine na uku (720MPa). Kamfanonin Amurka ma suna da irin wannan bayanai. Crankshaft fillet quenching gabaɗaya yana amfani da "inductor rabi-biyu" quenching, wanda kuma aka sani da hanyar quenching Elotherm (Elotherm). Shi ne cewa na'urar firikwensin da aka buckled a kan jarida, da crankshaft ne mai zafi da ruwa kashe a lokacin da juyawa (akwai kuma wani hali inda crankshaft jarida ne mai tsanani ga quenching zafin jiki sa'an nan kuma juya zuwa cikin tafkin don sanyaya da quenching). Wannan hanya ba kawai sauƙaƙe shigarwa da fita na firikwensin crankshaft ba, yana sauƙaƙa aikin kayan aikin na'ura mai kashewa, amma kuma yana warware ɓarna ramin mai, ƙarancin nisa na yanki mai taurare, ƙarancin kauri na Layer Layer Matsaloli kamar manyan matsaloli. nakasawa.

Mutanen da ke cikin masana'antar gabaɗaya sun yi imanin cewa hanyar Eluosen quenching babban ci gaba ne a fasahar kashe wutar lantarki ta crankshaft. Bayanai sun nuna cewa ƙaddamar da mujallolin crankshaft na iya haɓaka rayuwar injin zuwa sa'o'i 8000, yayin da ƙaddamar da mujallu da fillet na iya haɓaka rayuwar injin zuwa sa'o'i 10,000. Makullin fasaha wanda dole ne a warware don cimma nasarar fillet shine fasahar rarraba wutar lantarki. Crankshaft "Rabi-juya Inductor" quenching ya ƙunshi fasahohi da yawa, kamar samar da wutar lantarki ta mitar, kayan aikin kashe injina da inductor, da dai sauransu. Hakanan waɗannan fasahohin suna da mahimmanci sosai, amma waɗannan fasahohin an fara magance su a ƙasata a farkon shekarun 1980.

Babu shakka, quenching dumama na crankshaft fillet ya kamata a za'ayi m. Ya kamata a canza ƙarfin dumama na cikin crank da waje na crank, wato ikon da ke cikin crank ya zama babba, ƙarfin waje na crank ya zama ƙarami. Ana kiran wannan fasaha fasahar rarraba wutar lantarki. An kashe kusurwoyin da aka zagaye na manya da kanana crankshafts. Fasahar ita ce samar da wutar lantarki 100% lokacin dumama cikin crank, da kuma 60% (ko 70%) iko lokacin dumama waje na crank, kuma yayin da crankshaft yana juyawa, kusurwa yana ƙaruwa (ko raguwa) da wani adadi kaɗan. kowane 15 ° The iko.