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 nyob rau hauv chav tsev kub yog tsim los ntawm ib qho kev daws teeb meem, uas yog hu ua tooj dag; Yog li ntawd, high-strength tooj dag muaj zog hnav tsis kam. Kev ua tau zoo, siab zog tooj dag muaj lub zog siab, hardness thiab muaj zog tshuaj corrosion kuj. Mechanical kev ua tau zoo ntawm kev txiav ua kuj zoo heev. High-strength tooj dag feem ntau yog ua los ntawm cov ntawv, strips, rods, kav, cam khwb cia qhov chaw, thiab lwm yam.
High-strength tooj dag muaj zoo plasticity 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 thermal yuav tsum siab tshaj 700 degree.
High-strength tooj dag muaj cov ntsiab lus zinc sib txawv thiab cov khoom sib txawv. Rau tooj dag, raws li cov ntsiab lus zinc nce, ob qho tib si σb thiab δ tseem nce ntxiv. Yog li ntawd, tooj liab-zinc alloys uas muaj ntau tshaj 45% zinc tsis muaj nuj nqis. Standard high-strength tooj dag muaj Brinell hardness HB ntau dua 200, lub zog compressive siab dua 600MPa, thiab elongation ntau dua 10%.
High-strength tooj dag yog dav siv. Nws yog cam khwb cia rau hauv bearing bushes thiab bushings. Nyob rau hauv Suav teb, cov roj lubricated tsis pub bearings (xa mus rau cov khoom siv lubricated bearings) feem ntau yog ua los ntawm cov tooj dag muaj zog ua lub hauv paus. Lawv siv lub zog siab thiab lub zog siab zog tooj dag ua lub hauv paus. , thiab radially embedded nyob rau hauv lub cylindrical polymer muab tub lim raws li cov ntaub ntawv kev sib txhuam (feem ntau graphite, molybdenum disulfide, polytetrafluoroethylene, cav roj thiab lwm yam lubricants), nws superiority mas yog nyob rau hauv nws muaj peev xwm los ua tooj liab alloys thiab non-metals Anti-kev sib txhuam cov ntaub ntawv muaj lawv tus kheej. complementary zoo. Lawv tsis tsuas yog muaj peev xwm thauj khoom siab, tab sis kuj tawg los ntawm cov ciam teb ntawm cov bearings zoo tib yam uas tso siab rau cov roj zaj duab xis roj lubrication, ua tiav cov roj tsis muaj roj.
Lub embedded khoom lubrication tau yooj yim tsim cov zaj duab xis lubricating, uas zoo heev txhim kho nws cov kev sib txhuam thiab hnav kev ua tau zoo, thiab 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.
