Dacromet Bolt Manufacturing Process Analysis

Ntxiv rau cov khaub thuas galvanizing (electrogalvanizing) thiab kub -dip galvanizing, muaj lwm txheej txheej txheej txheej nrog corrosion tsis tshua muaj siab rau bolts-Dacromet kho. Keeb kwm los ntawm txawv teb chaws, Dacromet yog ib qho tshiab txheej txheej txheej txheej txheem rau bolts, uas nws cov ntsev tshuaj tsuag lub sij hawm deb tshaj li ntawm electrogalvanizing: txheem - khoDacromet boltstuaj yeem tiv taus cov tshuaj tsuag ntsev rau ntau pua teev, thiab cov uas muaj kev kho tshwj xeeb tuaj yeem tshaj 1,000 teev- qhov kev ua tau zoo uas electrogalvanizing tsis sib xws.

Nyob rau hauv thaum ntxov hnub, ntau daim ntawv thov scenarios nyob rau hauv Tuam Tshoj yuav tsum tau bolts nrog siab corrosion kuj. Electrogalvanized bolts feem ntau ua tsis tau raws li tus qauv tsim; Thaum kub -dip galvanizing muaj qee yam kev tiv thaiv corrosion, nws cov txheej tuab (vim cov txheej txheem cov yam ntxwv) nyiam ua rau cov xov precision puas, ua rau muaj teeb meem hauv cov txiv ntoo txuam. Dacromet kev kho mob zoo kawg nkaus ua tiav qhov sib txawv no: nws qhov kev tiv thaiv corrosion yog kwv yees li 10 npaug ntawm qhov zoo tib yam galvanizing, thiab cov txheej txheem kev kho mob tsis ua kom puas cov xov, tso cai rau kev sib txuam nrog.cov txiv ntoo pa. Nws kuj tsis muaj hydrogen embrittlement txaus ntshai thiab tuaj yeem tiv taus qhov kub thiab txias (feem ntau haum rau qhov chaw ua haujlwm hauv qab 300 degree). Yog li ntawd, feem ntau bolts siv hauv tsheb, maus taus thiab lwm yam kev thauj mus los tam sim no tau txais kev kho Dacromet.

Cov txheej txheem Dacromet tau tsim nyob rau hauv Tebchaws Europe hauv nruab nrab - xyoo pua 20th. Lub sijhawm ntawd, qee thaj chaw nyob sab Europe muaj huab cua txias thiab av noo, thiab cov tshuaj chloride ions hauv huab cua (xws li tshuaj tsuag ntsev) yooj yim corroded hlau substrates sai, ua rau muaj kev puas tsuaj loj rau cov cuab yeej thauj mus los. Cov kws tshawb fawb thiaj li tsim cov dej-raws li txheej uas muaj zinc hmoov, txhuas hmoov thiab chromate ua cov khoom tseem ceeb. Tom qab siv cov txheej txheem no rau saum npoo hlau, nws tsim cov zinc kaw- txhuas-chromium composite los tiv thaiv- txheej txheej corrosion los ntawm siab - qhov kub thiab txias. Hauv xyoo tom ntej no, cov txheej txheem no tau muab tso rau hauv kev yuav khoom ntawm Asmeskas cov tub rog thiab tau siv los ua kev tiv thaiv hauv tebchaws -theem tiv thaiv kev siv tshuab rau hnub no. Tom qab xyoo ntawm txoj kev loj hlob, Dacromet tau muaj kev vam meej thiab tau siv dav hauv ntau yam xws li hluav taws xob, kev tsim kho, tsheb, thiab tshuab engineering.

Cov txheej txheem kho ntawm Dacromet bolts yog txawv kiag li los ntawm txias galvanizing (electrogalvanizing). Nws cov txheej txheem tseem ceeb yog txheej txheej - ci curing es tsis yog electrolytic deposition: ua ntej, kom huv si huv si thiab qhuav cov roj stains thiab oxide scale ntawm lub ntsia liaj qhov rooj; ces uniformly siv Dacromet txheej (muaj zinc hmoov, txhuas hmoov, binder, thiab lwm yam) rau lub ntsia liaj qhov rooj nto (los ntawm dipping, txau, los yog lwm txoj kev); Tom ntej no, xa cov bolts coated rau hauv qhov cub ntawm 180-250℃rau ci rau 20-40 feeb, tso cai rau cov tshuaj tiv thaiv ntawm cov khoom nyob rau hauv txheej los ua ib tug ntom composite anti-corrosion txheej. Tom qab cov txheej txheem tiav lawm, cov bolts tsis tas yuav polishing ntxiv, ci ntsa iab, passivation lossis lwm yam kev kho mob, thiab lawv tsis xav tau cov txheej txheem hydrogen. Tsis tas li ntawd, txheej txheej tsis muaj cov hlau hnyav hnyav (dacromet ib txwm muaj chromate, thiab chrome-dawb ib puag ncig tus phooj ywg Dacromet yog tam sim no muaj), ua rau nws yog ib qho ntawm cov kev kho mob tseem ceeb rau kev xa tawm bolts.

Dacromet bolts muaj qhov zoo tshaj plaws: piv nrogelectrogalvanized bolts, lawv tsis tsuas yog muaj kev txhim kho corrosion kuj zoo dua, tab sis kuj muaj cov txheej txheem ntau dua (feem ntau 5-15 microns) thiab muaj zog adhesion. Txawm hais tias kev sib txhuam me ntsis tshwm sim thaum lub sij hawm thauj mus los lossis kev teeb tsa, cov txheej txheem tsis yooj yim rau tev tawm kom nthuav tawm cov substrate, zam qhov tsim ntawm qhib cov ntsiab lus corrosion. Piv nrog kub-dip galvanizing, Dacromet txheej yog nyias thiab sib xws. Thaum kho cov txiv ntseej, nws yuav tsis ua rau cov xov sab hauv yuav tsum tau ua kom tiav vim cov txheej txheej ntau dhau, ua kom lub cev muaj zog thiab kev teeb tsa ntawm cov txiv ntseej thiab bolts yam tsis tas yuav tsum tau kho tapping tom ntej.