Cov txheej txheej saum npoo ntawm cov ntsia hlau yog ib qho tseem ceeb raws li cov khoom siv ntsia hlau nws tus kheej. Screw threads yog tsim los ntawm kev txiav los yog tsim cov txheej txheem machining, thiab cov txheej txheem saum npoo muab cov txheej txheem tseem ceeb ntawm kev tiv thaiv rau cov ntsia hlau shank thiab xov.
Txog qhov kawg, cov ntsia hlau tau txais txiaj ntsig zoo los ntawm ntau yam ntawm cov txheej txheem txheej txheej uas tau tsim los rau txhua daim ntawv thov ntsia hlau txhawm rau muab kev pom zoo corrosion thiab kev tiv thaiv tawg.
Nyob rau hauv ib lub ntsiab lus, cov txheej txheej saum npoo yog siv rau cov ntsia hlau kom nce qhov chaw tiv thaiv thiab tiv thaiv cov ntsia hlau los ntawm kev ua tsis tiav ntxov vim corrosion los yog tawg.
Yog li, dab tsi yog txoj kev kho cov ntsia hlau feem ntau? Cov hauv qab no yog cov txheej txheem kev kho cov ntsia hlau feem ntau:
1. Zinc plating
Txoj kev kho saum npoo feem ntau rauNtsia hlau yog electro galvanizing. Nws tsis tsuas yog pheej yig xwb, tab sis kuj muaj qhov zoo nkauj zoo nkauj. Electroplating muaj nyob rau hauv dub thiab ntsuab ntsuab. Txawm li cas los xij, ib qho tsis zoo ntawm electro galvanizing yog tias nws cov kev ua haujlwm tiv thaiv corrosion yog qhov dav, thiab nws muaj qhov qis tshaj plaws los tiv thaiv corrosion ntawm ib qho plating (txheej) txheej. Feem ntau, cov ntsia hlau tom qab electro galvanizing tuaj yeem dhau qhov nruab nrab ntsev tshuaj tsuag tsis pub dhau 72 teev, thiab tus neeg saib xyuas tshwj xeeb kuj tseem siv, kom cov tshuaj ntsev ntsev tom qab electro galvanizing tuaj yeem kav ntev dua 200 teev, tab sis nws kim dua. , raug nqi 5-8 npaug ntau npaum li cov galvanizing.
2. Chromium plating
Cov chromium txheej ntawm cov ntsia hlau fasteners yog ruaj khov nyob rau hauv ib puag ncig, tsis yooj yim hloov xim los yog poob luster, muaj ib tug siab hardness, thiab yog resistant rau hnav. Txawm hais tias chromium txheej feem ntau yog siv los ua cov txheej zoo nkauj ntawm cov fasteners, nws tsis tshua muaj siv hauv kev lag luam uas yuav tsum muaj kev tiv thaiv corrosion siab. Vim hais tias zoo chrome plated fasteners yog kim li stainless hlau, lawv yuav tsum tsuas yog siv thaum lub zog ntawm stainless hlau tsis txaus. Txhawm rau txhim kho chromium plating corrosion kuj, tooj liab thiab npib tsib xee yuav tsum tau plated ua ntej chromium plating. Txawm hais tias chromium txheej tuaj yeem tiv taus qhov kub ntawm 1200 degrees Fahrenheit (650 degrees Celsius), nws raug kev txom nyem los ntawm tib qhov teeb meem hydrogen embrittlement li galvanizing.
3. Nyiaj thiab npib tsib xee plating rau saum npoo
Silver txheej rau cov ntsia hlau fastenersua hauj lwm raws li ib tug khoom lubricant rau fasteners nrog rau txoj kev tiv thaiv corrosion. Vim yog tus nqi, cov ntsia hlau feem ntau tsis siv, thiab qee zaus cov bolts me me kuj yog nyiaj plated. Txawm hais tias nws tarnishes hauv huab cua, nyiaj tseem ua haujlwm ntawm 1600 degrees Fahrenheit. Txhawm rau ua haujlwm hauv qhov kub thiab txias fasteners thiab tiv thaiv cov ntsia hlau oxidation, cov neeg siv lawv cov kub tsis kam thiab lubricating zoo. Fasteners feem ntau yog npib tsib xee-plated ntawm qhov chaw uas muaj kev ua haujlwm siab thiab tiv thaiv corrosion. Piv txwv li, lub tsheb roj teeb lub davhlau ya nyob twg tuaj.
4.Screw nto khoDacromet
Kev kho deg ntawmDacromet rau cov ntsia hlau fastenerstsis muaj hydrogen embrittlement, thiab torque preload tsis tu ncua ua tau zoo heev. Txawm li cas los, nws pollutes tiag. Yog tias tsis suav nrog cov teeb meem nrog chromium thiab kev tiv thaiv ib puag ncig, nws yog qhov tsim nyog tshaj plaws rau lub zog siab fasteners uas muaj zog tiv thaiv corrosion.
5. Nto phosphating
Txawm hais tias phosphorating tsis tshua kim dua li galvanizing, nws muaj kev tiv thaiv tsawg dua corrosion.Ntsia hlau fastenersyuav tsum tau oiled tom qab phosphating vim hais tias cov roj kev ua tau zoo muaj ntau yam ua rau corrosion kuj ntawm cov fasteners. Siv cov tshuaj tiv thaiv kab mob dav dav tom qab phosphating, thiab cov tshuaj tsuag ntsev tsuas yog siv sijhawm li 10 mus rau 20 teev.Cov ntsia hlau fastener tuaj yeem siv sijhawm 72-96 teev yog tias cov roj siv tshuaj tiv thaiv siab heev, tab sis tus nqi yog 2-3 zaug siab dua cov roj phosphating. Vim tias lawv cov torque thiab pre-tightening quab yuam muaj kev ua tau zoo zoo ib yam, feem ntau ntawm cov ntsia hlau ntsia hlau yog kho los ntawm phosphating + oiling. Nws nquag ua haujlwm nyob rau hauv lub tsev lag luam vim tias nws yuav ua tau raws li qhov xav tau ntawm fastening xav tau thaum lub sij hawm sib dhos ntawm cov khoom thiab cov khoom. Tshwj xeeb tshaj yog thaum txuas qee qhov tseem ceeb, qee cov ntsia hlau siv phosphating, uas tuaj yeem tiv thaiv qhov teeb meem ntawm hydrogen embrittlement. Yog li ntawd, nyob rau hauv kev lag luam teb, screwwith ib qib siab tshaj 10.9 feem ntau phosphated.
Post lub sij hawm: Feb-15-2023