Piston nplhaib yog ib qho tseem ceeb ntawm lub cav. Cov khoom ntawm lub nplhaib piston yuav tsum muaj lub zog tsim nyog, hardness, elasticity thiab qaug zog tsis kam, zoo heev hnav tsis kam, kub tsis kam thiab corrosion kuj. Nrog rau kev txhim kho cov tshuab niaj hnub mus rau kev kub ceev, siab load, thiab qis emissions, thaum lub sij hawm yuav tsum tau rau piston nplhaib cov ntaub ntawv tau dhau los ua siab dua thiab siab dua, kev kho deg kuj yuav tsum tau siab dua. Ntau thiab ntau dua tshiab kev kho cua sov technologies tau los yog siv nyob rau hauv lub tshav kub kev kho mob ntawm piston rings, xws li ion nitriding, nto ceramics, nanotechnology, thiab lwm yam. Cov kab lus no feem ntau yog qhia txog infiltration ceramic kho ntawm piston nplhaib.

Piston nplhaib immersion ceramic kev kho mob yog ib tug low-temperature plasma tshuaj vapor deposition technology (PCVD luv luv). Ib zaj duab xis ceramic nrog lub thickness ntawm ob peb micrometers yog zus nyob rau saum npoo ntawm cov hlau substrate. Nyob rau tib lub sij hawm thaum cov ceramic nkag mus rau hauv cov hlau nto, cov hlau ions kuj nkag mus rau hauv ceramic Cov zaj duab xis nkag mus rau hauv thiab ua ob txoj kev diffusion, dhau los ua "cermet composite film". Tshwj xeeb, cov txheej txheem tuaj yeem loj hlob cov hlau sib xyaw ceramic rau ntawm cov hlau substrate uas nyuaj rau cov khoom siv semiconductor xws li chromium kom diffuse rau hauv.

Qhov no "metal ceramic composite film" muaj cov yam ntxwv hauv qab no:

1. Loj hlob ntawm qhov kub qis dua 300 ℃ tsis muaj kev cuam tshuam rau lub nplhaib piston;

2. Cov hlau nyob rau saum npoo ntawm lub nplhaib piston undergoes ob txoj kev diffusion nrog boron nitride thiab cubic silicon nitride nyob rau hauv lub tshuab nqus tsev plasma lub xeev, tsim ib tug haumxeeb khoom nrog ib tug gradient gradient, yog li ntawd nws yog ruaj khov ua ke;

3. Vim hais tias cov ceramic nyias zaj duab xis thiab hlau tsim ib oblique gradient functional khoom, nws tsis tsuas plays lub luag hauj lwm nyob rau hauv khov kho cov kev hloov txheej txheem, tab sis kuj hloov lub zog ntawm ceramic daim ntawv cog lus ntug, txhim kho qhov khoov kuj, thiab ho txhim kho qhov chaw. hardness thiab toughness ntawm lub nplhaib;

4. Zoo dua kub hnav tsis kam;

5. Enhanced antioxidant muaj peev xwm.

Vim tias cov yeeb yaj kiab ceramic muaj qhov ua haujlwm ntawm nws tus kheej, lub nplhaib piston impregnated nrog ceramic piston nplhaib tuaj yeem txo qhov kev sib txhuam coefficient ntawm lub cav los ntawm 17% 30%, thiab tus nqi hnav ntawm nws thiab kev sib txhuam khub yog txo los ntawm 2 / /5 1/2, thiab nws tuaj yeem txo qis. Cav vibration thiab suab nrov. Nyob rau tib lub sijhawm, vim qhov kev sib khi zoo ntawm cov yeeb yaj kiab ceramic thiab lub cav lub tog raj kheej liner, qhov nruab nrab ntawm cov pa tawm ntawm lub piston kuj tau txo qis los ntawm 9.4%, thiab lub cav fais fab tuaj yeem nce 4.8% 13.3%. Thiab txuag roj 2.2% 22.7%, roj cav 30% 50%.