1.How los tswj hwm cov alloy muaj pes tsawg leeg los tswj cov duab ntawm zinc paj?
Daim Ntawv Thov Ib Tsaus ntawm Cov Hmoov
Mechanism ntawm kev nqis tes ua: txhuas yog insoluble hauv cov khoom zinc, faib cov khaub noom sib xyaw ua ke ntawm cov siv lead ua ke
Bidirectional Cov Cai ntawm Aluminium:
Cov yeeb yaj kiab paj me me: Thaum cov ntsiab lus txhuas yog 0.1% ~ 0.2%, al₂o₃ zaj duab xis yog tsim ntawm Crystal tus nqi ntawm Crystal Nuclei los ua 1 ~ 5 hli nruab nrab zinc paj.
Refining nyhuv ntawm kab ntsiab lus
Ntxiv cov tshuaj pleev ib ce thiab bismuth: hauv cov txheej txheem txhuas, 0.05% ~ 02% ~ 001% ~ 0.01% ~ 0.01% ~ 0.01% ~ 0.01% ~ 0.01% ~ 0.01% ~ 0.01% ~ 1 hli (cov paj me me).
Synergistic nyhuv ntawm npib tsib xee thiab magnesium: ib qho me me ntawm Ni (0.01%) lossis haum rau high-xaus zinc paj-dawb txheej.
2.YHow qhov kev hloov pauv yuav cuam tshuam spangle hom?
Kev ua kom txias sai (zinc paj / tsis muaj cua daj cua dub) muaj cov cua txias Qhov nce nyob rau hauv supercooling ua rau ib tug xov tooj ntawm crystal nuclei, tab sis lub sijhawm kev loj hlob luv luv, xws li cov khoom siv siv me me).
Dej txias / pos huab cua txias: tshuaj tsuag dej los yog dej txias dua nyob rau hauv cov ntaub ntawv flasystal thiab tau txais ib qho zinc paj dawb (cov khoom siv tsheb, cov khoom siv kho mob).
Kev Txias Txias (Loj Zinc Paj Ntaub): Cua Txias / Cua Txias lossis Cua Txias Ntawm Tus Nqi ntawm 5 ~ 10mm Cov Qauv Loj (Cov Hlau Steel, Pipelines).
3.Yog li cas txias txias txias muaj nyob rau qhov loj ntawm zinc paj?
Txoj kev tswj hwm tsis tau: Cov theoretical solidification ntawm Zinc yog 419.5 degree. Hauv kev tsim khoom tiag tiag, qhov ntsuas kub ntawm cov hlau phaj xav tau tswj hwm ntawm 410 ~ 417℃(undercooling 2 ~ 9 degree):
Siab undercooling (xws li 9 degree): Ntau txoj kev loj hlob, kev loj hlob sai, yooj yim rau daim ntawv zoo zinc paj;
Tsawg undercooling (xws li 2 degree): tsawg dua crystal nuclei, kev loj hlob qeeb, ua cov coarse zinc paj.
4.How yog tom qab ua cov tsos thiab kev ua tau zoo ntawm zinc spangles?
Daim tawv-dhau dov (flattening kho)
Cov txheej txheem tsis: Tom qab galvanizing, cov hlau yog dov nrog ib qho kev txo qis ntawm 1% ~ 3% los ntawm lub ntsej muag zoo nkauj thiab plooj rau cov cheeb tsam los ntawm 50%.
Daim Ntawv Thov Kev Ua Yeeb Yam: Cov khoom siv hluav taws xob hauv tsev, txhim kho lub tsev zoo nkauj, txhim kho cov kev sib dhos hauv qab, thiab txhim kho cov kev sib xyaw ua ke ntawm cov tshuaj tsuag lossis luam ntawv.
Alloying Annealing Kho
Txheej txheem tsis: Tom qab Galvanizing, kub rau 450 ~ kom sov nyob rau hauv ib txheej rauv thiab kom sov rau cov hlau substrate los ua ib qho FE-ZN Alloy Txheej.
Cov nyhuv: cov zinc caj ces ploj mus tag nrho, qhov saum npoo yog uniform nyiaj-grey, thiab corrosion kuj yog txhim kho. Nws yog qhov haum rau scenes nrog siab corrosion Kuj yuav tsum muaj xws li Chassis Chassis thiab Fasteners.
Deg passivation kev kho mob
Chromate Passivation: Hauv cov txheej txheem ib txwm muaj, ib txheej passivation yog tsim nyob rau saum npoo ntawm zinc txheej los sau cov khoob ntawm zinc thiab tsis muaj zog pom cov qauv.
Cov txheej txheem Chromium-Dawb Passusation: Cov txheej txheem phooj ywg zoo ib puag ncig siv cov khoom lag luam, Titanium Xirconium ntsev thiab lwm yam kev kho mob. Txawm hais tias nws tsis muaj cov nyhuv ncaj qha rau qhov loj ntawm zinc paj, nws tuaj yeem txhim kho cov kev sib txawv saum npoo thiab yog qhov haum rau cov hluav taws xob sib xyaw.
5.Qhov dab tsi yog cov ua thiab cov kev daws teeb meem rau kev tsis sib luag Zinc Loj?
Cause: kev hloov pauv ntawm zinc kua muaj composition (xws li cov ntsiab lus zoo hauv qee thaj chaw) thiab txhaws ntawm lub zuaj cua txias hauv cheeb tsam txias.
Kev daws: Kev tshuaj xyuas lub sijhawm tiag tiag ntawm zinc