Hardness ntawm cov camshafts
Lub hardness ntawm cov camshafts yog lub tshuab tseem ceeb heev cuam tshuam nrog lawv qhov kev ua tau zoo, ruaj, thiab kev nyab xeeb hauv automotive braking tshuab. Raws li qhov tseem ceeb sib xyaw uas hloov kho cov lus tsa suab rau hauv cov kab yuam kom ua rau khau nres tsheb nres, kev sib txhuam, thiab hnav thaum ua haujlwm.
Feem ntau, nres camshafts yog tsim los ntawm high-carbon alloy steels (piv txwv li cov hlau, nrog hardness values ua kom muaj zog thiab tawv. Rau hlau CamShafts, Cov tawv tawv muaj zog yog feem ntau txhim kho los ntawm kev kho cua sov xws li 55-62 hrc (rockwell c nplai) ntawm cov chaw ua haujlwm. Qhov siab heev saum wardness tiv thaiv kev hnav los ntawm kev sib cuag nrog cov khau nres lossis chais.
Hauv kev sib piv, cov tub ntxhais ntawm camshaft yuav tsum tau qis dua (nyob ib ncig ntawm 25-35 HRC) kom muaj kev tiv thaiv nruj, tiv thaiv brittleness thiab muaj peev xwm tawg hauv cov nra hnyav. Rau canile hlau camshafts, Hardness feem ntau ntawm 200-300 HB (brinell nplai), tiav ntawm Pearlitic Matrix tsim, muab kev sib xyaw zoo ntawm machinancient thiab hnav tsis kam.
Hardness ntsuas yog cov kev ua si zoo li rockwell lossis brinell nplai kom ntseeg tau nrog cov qauv kev lag luam (piv txwv li, ees, ISO). Tsim kom zoo ua kom cov camshaft tuaj yeem ua kom tau nyiaj ntau lab uas tsis muaj kev hnav ntau dhau, kev tswj hwm kev ua tau zoo thiab txo cov kev xav tau kev saib xyuas. Kev sib txawv los ntawm kev ua tsis ncaj ncees yuav ua rau thaum ntxov ua tsis tiav, txoj kev nyab xeeb hauv tsheb.
