Cov yam ntxwv ntawm cov khoom siv thiab kev siv ntau yam ntawm cov tooj dag muaj zog
Cov tshuaj formula ntawm high-strength tooj dag yog ZCuZn25Al6Fe3Mn3, nrog ib tug tooj liab ntsiab lus ntawm txog 65% thiab ib tug zinc ntsiab lus ntawm txog 24%. Aluminium tuaj yeem txhim kho lub zog, hardness thiab corrosion kuj ntawm tooj dag. Muaj peb hom qauv ntawm chav tsev kub ntawm tooj dag: tooj dag nrog zinc cov ntsiab lus tsawg dua 35%, lub microstructure ntawm chav tsev kub yog tsim los ntawm ib qho kev daws teeb meem, hu ua tooj dag; yog li cov tooj dag muaj zog muaj zog hnav tsis kam, siab zog, siab hardness, thiab muaj zog tshuaj corrosion kuj. Cov cuab yeej cuab tam ntawm kev txiav ua haujlwm kuj zoo heev. High-strength tooj dag feem ntau yog ua los ntawm cov ntawv, strips, tuav, kav, castings, thiab lwm yam.
High-strength tooj dag muaj cov yas zoo thiab muaj peev xwm tiv taus kub thiab txias ua, tab sis nws yog nquag mus rau nruab nrab-kub brittleness thaum kub ua xws li forging. Nws qhov tshwj xeeb kub ntau txawv nrog cov ntsiab lus Zn, feem ntau ntawm 200 thiab 700 degree. Yog li ntawd, qhov kub thaum lub sij hawm ua kub yuav tsum siab tshaj 700 degree.
Cov khoom siv dag zog ntawm cov tooj dag muaj zog sib txawv nrog cov ntsiab lus zinc. Rau tooj dag, raws li cov ntsiab lus zinc nce, σb thiab δ ob qho tib si nce tsis tu ncua. Yog li ntawd, tooj liab-zinc alloys nrog zinc cov ntsiab lus ntawm ntau tshaj 45% tsis muaj nuj nqis. Brinell hardness HB ntawm tus qauv siab zog tooj dag yog ntau dua 200, lub zog compressive yog ntau dua 600MPa, thiab elongation yog ntau dua 10%.
High-strength tooj dag yog dav siv thiab ua rau hauv bearings thiab bushes los ntawm casting. Cov khoom lubricated roj-dawb bearings (xws li cov khoom lubricated bearings) ua los ntawm high-strength tooj dag li matrix yog siv nyob rau hauv Suav teb. High-strength high-strength tooj dag yog siv raws li lub matrix, thiab radially embedded cylindrical polymer fillers yog teem nyob rau hauv ib tug kom zoo li cov ntaub ntawv sib txhuam (feem ntau graphite, molybdenum disulfide, polytetrafluoroethylene, cav roj thiab lwm yam lubricants). Nws superiority feem ntau yog nyob rau hauv hais tias nws ua rau tooj liab alloys thiab non-metallic anti-xeb cov ntaub ntawv muaj lawv tus kheej complementary zoo. Nws muaj peev xwm thauj khoom siab thiab tawg los ntawm kev txwv ntawm cov kabmob dav dav uas tso siab rau cov roj zaj duab xis roj lubrication, paub txog cov roj tsis muaj roj lubrication.
Lub embedded khoom lubricant yog ib qho yooj yim los tsim ib tug lubricating zaj duab xis, uas zoo heev txhim kho nws kev sib txhuam thiab hnav kev ua tau zoo. Nws yog ruaj khov, txhim khu kev qha thiab raug nqi. Piv nrog cov roj tsis muaj roj sib xyaw bearings, nws muaj qhov zoo ntawm kev ua haujlwm zoo, siab precision, muaj zog load-bearing muaj peev xwm thiab zoo hnav tsis kam.
