Babbitt yog cov khoom siv dav dav tshaj plaws, muaj npe tom qab kev tsim khoom ntawm American Babbitt, vim nws cov xim dawb, tseem hu ua hlau dawb, nws daim ntawv thov tuaj yeem taug qab mus rau lub sijhawm ntawm Industrial Revolution. Tin-raws li babbitt thiab txhuas-raws li babbitt nrog kev sib txhuam-txo cov khoom yog tib cov ntaub ntawv tsim nyog rau kev sib hloov piv rau qis-hardness shafts. Piv nrog rau lwm cov khoom siv bearing, lawv muaj kev hloov tau zoo dua thiab nias-haum, thiab tau siv dav hauv Marine diesel cav loj, turbines, alternators, thiab lwm yam mining machinery thiab loj rotating machinery.
Cov khoom tseem ceeb ntawm babbitt yog tin, lead, antimony, thiab tooj liab. Ntawm lawv, antimony thiab tooj liab yog siv los txhim kho lub zog thiab hardness ntawm alloy. Babbitt alloys tuaj yeem muab faib ua peb hom: high-tin alloys, high-lead alloys thiab master alloys (hauv cov alloys, ob qho tib si tin thiab txhuas nyob rau hauv ib qho tseem ceeb feem). Nyob rau hauv tag nrho cov no alloy systems, antimony thiab tooj liab ua hauj lwm tseem ceeb alloying thiab hardening ntsiab, thiab lawv cov qauv yog tsim los ntawm ib tug nyuaj, intermetallic compounds dispersed nyob rau hauv ib tug mos matrix.
Lub microstructure yam ntxwv ntawm babbitt yog hais tias lub hard theem hais yog tusyees faib nyob rau hauv lub mos theem matrix, thiab lub mos theem matrix ua rau lub babbitt alloy muaj zoo heev embedding, ua raws li thiab tiv thaiv qaug dab peg, thiab tom qab khiav hauv, cov mos matrix yog nyob rau hauv. lub mos matrix. Lub concave thiab convex nyuaj cov ntsiab lus tsim qhov sib txawv me me ntawm qhov zawv zawg qhov chaw, uas dhau los ua qhov chaw cia roj thiab cov roj lubricating channel, uas yog qhov tsim nyog los txo kev sib txhuam; cov ntsiab lus convex nyuaj ua lub luag haujlwm txhawb nqa thiab muaj txiaj ntsig rau kev coj tus kheej.
Ntxiv nrog rau kev tsim cov zawv zawg bearings, babbitt alloys feem ntau siv los ntawm kev txau lawv cov xov hlau lossis cov hmoov ntawm cov hlau thiab lwm cov substrates los ua cov kabmob bushes vim lawv cov mos mos thiab tsis muaj zog. Txhawm rau tiv thaiv kev sib cais ntawm cov khoom sib cais thiab ua kom zoo cov nplej, ib qho me me ntawm arsenic feem ntau ntxiv.
Raws li lub teb chaws tus qauv, babbitt alloys tau muab faib ua tin-raws li alloys thiab txhuas-raws li alloys. Lub zog thiab hardness ntawm txhuas-raws li alloys yog qis dua cov tin-raws li alloys, thiab corrosion kuj tsis zoo. Yog li ntawd, thaum cov neeg siv khoom siv babbitt alloys, lawv feem ntau xaiv tin-raws li alloys. Cov qib uas nquag siv yog ZChSnSb11-6, ZChSnSb8-4 thiab lwm yam. Txawm hais tias qhov kev ua tau zoo ntawm cov hlau lead-raws li tsis zoo li cov tin-raws li alloy, ntau tus neeg siv khoom tseem xaiv siv nws vim nws siv nyiaj ntau dua. Nws cov qib siv feem ntau yog ZChPbSb16-16-2, ZChPbSb1-16-1 thiab lwm yam.