Nkag siab qhov roughness Ra
2023-05-18
ib·
Lub tswvyim ntawm nto roughness
Deg roughness hais txog qhov tsis sib xws ntawm lub tshuab ua haujlwm nrog cov khoob me me thiab cov ncov me me thiab hav. Qhov kev ncua deb (yoj nrug) ntawm nws ob lub ncov lossis kwj ha yog me me (hauv qab 1 hli), uas belongs rau micro geometric duab yuam kev.Tshwj xeeb, nws hais txog qhov siab thiab qhov sib nrug S ntawm qhov me me ncov hav Z. Feem ntau muab faib los ntawm S:
S <1mm yog qhov roughness ntawm qhov chaw;
1 ≤ S ≤ 10mm yog lub waviness;
S＞ 10mm yog nyob rau hauv daim ntawv ntawm f.
二·Qhov cuam tshuam loj ntawm qhov roughness ntawm qhov chaw
Muaj feem xyuam rau hnav tsis kam. Qhov rougher ntawm qhov chaw, qhov me me ntawm qhov chaw sib cuag zoo ntawm qhov chaw mating, qhov siab dua, qhov kev sib txhuam ntau dua, thiab qhov hnav sai dua.
Muaj feem xyuam rau stability ntawm qhov haum. Rau kev tshem tawm haum, qhov rougher ntawm qhov chaw, qhov hnyav dua nws yog hnav, ua rau maj mam nce hauv kev tshem tawm thaum lub sijhawm ua haujlwm; Rau kev cuam tshuam haum, vim hais tias cov micro convex peaks yog nyem tiaj tus thaum lub sij hawm sib dhos, qhov cuam tshuam tiag tiag raug txo qis thiab kev sib txuas lub zog raug txo.
Ua rau qaug zog. Muaj cov troughs loj rau ntawm qhov chaw ntxhib, uas, zoo li cov ntse ntse thiab cov kab nrib pleb, yog qhov nkag siab rau kev ntxhov siab thiab yog li cuam tshuam rau lub zog qaug zog ntawm qhov chaw.
Muaj feem xyuam rau corrosion. Rough nto ntawm qhov chaw tuaj yeem yooj yim ua rau cov roj corrosive lossis cov kua dej nkag mus rau hauv cov txheej txheem ntawm cov hlau los ntawm kev siv cov grooves rau ntawm qhov chaw, ua rau muaj qhov corrosion.
Muaj feem xyuam rau kev ua haujlwm sealing. Cov chaw ntxhib tsis tuaj yeem haum nruj ua ke, thiab cov pa roj los yog kua xau los ntawm qhov khoob ntawm qhov chaw sib cuag.
Muaj feem cuam tshuam rau qhov tawv nqaij. Kev sib cuag nruj yog lub peev xwm ntawm qhov sib koom ua ke ntawm cov khoom tiv thaiv kom tiv thaiv kev sib cuag deformation nyob rau hauv cov rog sab nraud. Lub rigidity ntawm lub tshuab feem ntau nyob ntawm qhov kev sib cuag nruj ntawm ntau qhov chaw.
Muaj feem xyuam rau qhov ntsuas qhov tseeb. Qhov saum npoo roughness ntawm ob qhov ntsuas qhov saum npoo ntawm ib feem thiab qhov ntsuas qhov saum npoo ntawm cov cuab yeej ntsuas ncaj qha cuam tshuam rau qhov ntsuas qhov tseeb, tshwj xeeb tshaj yog hauv kev ntsuas qhov tseeb.
Tsis tas li ntawd, nto roughness muaj qhov sib txawv ntawm qhov cuam tshuam ntawm txheej txheej, thermal conductivity thiab tiv thaiv kev tiv thaiv, kev xav thiab hluav taws xob, tsis kam ua kua thiab roj ntws, thiab cov dej ntws tam sim no ntawm cov khoom siv ntawm cov khoom.
