Zoben fistan yana ɗaya daga cikin mahimman sassan injin. Abubuwan da ke cikin zoben piston ya kamata su sami ƙarfin da ya dace, tauri, elasticity da juriya ga gajiya, kyakkyawan juriya na lalacewa, juriya mai zafi da juriya na lalata. Tare da haɓaka injunan zamani zuwa babban gudu, babban nauyi, da ƙarancin hayaƙi, yayin da buƙatun kayan zoben piston ke ƙaruwa da girma, jiyya na saman kuma yana ƙarƙashin buƙatu mafi girma. Ana ƙara sabbin fasahohin kula da zafi ko kuma ana amfani da su a cikin maganin zafi na zoben piston, irin su ion nitriding, tukwane na sama, nanotechnology, da sauransu.

Piston zobe immersion yumbu magani fasaha ce mai ƙarancin zafin jiki mai ƙarancin zafin jiki (PCVD a takaice). Fim ɗin yumbu tare da kauri na ɗimbin micrometers ana girma a saman saman ƙarfe na ƙarfe. A daidai lokacin da yumbu ya shiga cikin saman ƙarfe, ions na ƙarfe kuma suna shiga yumbura Fim ɗin ya shiga ciki kuma ya haifar da yadawa ta hanyoyi biyu, ya zama "fim ɗin haɗin gwiwar cermet". Musamman ma, tsarin zai iya haɓaka kayan yumbu mai haɗe da ƙarfe a kan ƙaramin ƙarfe wanda ke da wahala ga kayan semiconductor kamar chromium don yaduwa a ciki.

Wannan "karfe yumbu composite film" yana da wadannan halaye:

1. Girma a ƙananan zafin jiki a ƙasa da 300 ℃ ba tare da wani mummunan tasiri a kan zoben piston ba;

2. Ƙarfe a saman zoben piston yana jujjuyawa ta hanyoyi biyu tare da boron nitride da cubic silicon nitride a cikin yanayin plasma mara kyau, yana samar da kayan aiki tare da gradient gradient, don haka an haɗa shi da ƙarfi;

3. Saboda yumbu na bakin ciki fim da karfe samar da wani oblique gradient aiki abu, shi ba kawai taka rawa a da tabbaci bonding da mika mulki Layer, amma kuma canza ƙarfin yumbu bond baki, inganta lankwasawa juriya, da muhimmanci inganta surface. taurin da taurin zobe;

4. Better high zafin jiki lalacewa juriya;

5. Ingantaccen ƙarfin antioxidant.

Saboda fim ɗin yumbu yana da aikin sa mai da kansa, zoben piston da aka haɗa da zoben piston yumbu zai iya rage ƙimar juzu'in injin ta 17% 30%, kuma adadin lalacewa tsakaninsa da nau'in gogayya yana raguwa da 2/ /5 1/2, kuma ana iya rage shi sosai. Jijjiga inji da hayaniya. A lokaci guda, saboda kyakkyawan aikin rufewa tsakanin fim ɗin yumbu da injin silinda, matsakaicin yayyan iska na piston shima ya ragu da 9.4%, kuma ana iya ƙara ƙarfin injin da 4.8% 13.3%. Kuma ajiye man fetur 2.2% 22.7%, man inji 30% 50%.