Nws pib nrog kev sim ua tsis tiav. Nws nyob hauv 1890. Hauv ib lub zos Pennsylvania me me, tus neeg tsim khoom Edward Goodrich Acheson tau ua ntau qhov kev sim. Nws sim ua kom sov cov pa roj carbon ntau heev kom nws ua rau pob zeb diamond.
Lub hom phiaj ntawm kev sib tsoo yog dab tsi?
Ib qho abrasive yog ib hom khoom siv tawv heev, (nws feem ntau tuaj yeem yog pob zeb). Abrasives yog siv nyob rau hauv ntau hom kev siv hauv tsev, kev lag luam thiab kev siv thev naus laus zis. Abrasives yog siv los ua kom tiav lossis tsim ib daim ntawv ua haujlwmRhaub cov abrasive ntawm cov khoom ua haujlwm ua rau ib feem ntawm cov khoom ua haujlwm raug hnav.
Thaum twg lub log sib tsoo tau tsim?
In 1873 tus neeg ua haujlwm, Sven Pulson, tau tsim lub log uas raug rho tawm haujlwm los ntawm kev sib xyaw ntawm emery hmoov, av nplaum thiab dej. Frank Norton patented lub tswvyim thiab pib tsim Pulson lub sib tsoo log.
Natural abrasive yog dab tsi?
Natural abrasives suav nrog pob zeb diamond, corundum, thiab emery; lawv tshwm sim nyob rau hauv tej yam ntuj tso deposits thiab yuav tsum tau mined thiab ua rau siv nrog me ntsis hloov. Synthetic abrasives, ntawm qhov tod tes, yog cov khoom lag luam ntawm kev ua haujlwm ntawm cov khoom siv raw lossis tshuaj lom neeg ua ntej; Lawv suav nrog silicon carbide, …
Yuav ua li cas ntxhia yuav zoo abrasive?
Minerals nrog hardness txog 6 lossis siab dua ntawm Mohs nplai tuaj yeem suav tias yog qhov tshwm sim ntawm abrasives. TABLE 1. Tej yam tshwm sim abrasives siv xws li xuab zeb (quartz), garnet, emery, corundum, thiab pob zeb diamond.
