Galvanized yeeb nkab
Txoj kev khiav yog:dub raj-alkaline ntxuav-dej ntxuav-pickling-dej yaug-soaking pab-drying-kub dip galvanizing-sab nraud tshuab-sab hauv tshuab-cua txias-dej txias-Passivation-dej yaug-kev soj ntsuam-hnyav-cia.
1, Hom thiab tshuaj muaj pes tsawg leeg
Qib thiab tshuaj muaj pes tsawg leeg ntawm cov hlau rau galvanized steel kav yuav tsum ua raws li qib thiab tshuaj muaj pes tsawg leeg ntawm cov hlau rau cov kav dej dub raws li tau teev tseg hauv GB / T3091.
2, Txoj kev tsim khoom
Txoj kev tsim khoom ntawm cov yeeb nkab dub (qhov cub vuam lossis hluav taws xob vuam) yog xaiv los ntawm cov chaw tsim khoom. Kub-dip galvanizing yog siv rau galvanizing.
3. Xov thiab yeeb nkab sib txuas
(a) Rau galvanized steel kav xa nrog threads, cov xov yuav tsum tau machined tom qab galvanizing. Cov xov yuav tsum ua raws li YB 822 cov cai.
(b) Cov yeeb nkab steel hlau yuav tsum ua raws li YB 238; malleable cam khwb cia hlau yeeb nkab pob qij txha yuav tsum ua raws li YB 230.
4. Cov khoom siv kho tshuab Cov khoom siv ntawm cov kav hlau steel ua ntej galvanizing yuav tsum ua tau raws li qhov yuav tsum tau ua ntawm GB 3091.
5. Uniformity ntawm galvanized txheej Galvanized steel yeeb nkab yuav tsum tau kuaj rau cov uniformity ntawm galvanized txheej. Cov qauv yeeb nkab steel yuav tsum tsis txhob tig liab (tooj liab-plated) tom qab muab tso rau hauv tooj liab sulfate tov rau 5 zaug sib law liag.
6, Txias khoov xeem galvanized steel yeeb nkab nrog lub nominal txoj kab uas hla tsis tshaj 50 hli yuav tsum tau txias khoov xeem. Lub kaum sab xis yog 90 °, thiab lub vojvoog khoov yog 8 npaug ntawm txoj kab uas hla. Tsis muaj qhov muab tub lim thaum lub sijhawm kuaj, thiab qhov vuam ntawm cov qauv yuav tsum muab tso rau sab nraud lossis sab sauv ntawm txoj kev khoov. Tom qab kev sim, yuav tsum tsis txhob muaj kab nrib pleb thiab tev ntawm zinc txheej ntawm cov qauv.
7, Kev ntsuas dej siab Kev ntsuas dej siab yuav tsum tau ua nyob rau hauv lub clarinet, thiab kev ntsuas tam sim no tuaj yeem siv los hloov qhov ntsuas dej. Kev ntsuas siab lossis qhov loj ntawm qhov piv txwv piv rau kev ntsuas tam sim no yuav tsum ua raws li qhov yuav tsum tau ua ntawm GB 3092. Cov khoom siv ntawm cov hlau yog cov cim tseem ceeb los xyuas kom meej qhov kev siv kawg (cov khoom siv tshuab) ntawm cov hlau.
① Tensile zog (σb):Qhov siab tshaj plaws quab yuam (Fb) uas tus qauv dais thaum nws tawg thaum lub sij hawm stretching txheej txheem, muab faib los ntawm kev ntxhov siab (σ) tau los ntawm kev faib cov thawj cross-sectional cheeb tsam (Yog li) ntawm cov qauv, yog hu ua lub zog tensile zog (σb) , chav tsev yog N / mm2 (MPa). Nws sawv cev lub peev xwm siab tshaj plaws ntawm cov khoom siv hlau los tiv thaiv kev puas tsuaj nyob rau hauv tensile quab yuam. Hauv cov mis: Fb-qhov siab tshaj plaws quab yuam uas tus qauv dais thaum nws tawg, N (Newton); Yog li-tus thawj cross-sectional cheeb tsam ntawm tus qauv, mm2.
②Yield point (σs):Rau cov khoom siv hlau uas muaj qhov tshwm sim tshwm sim, qhov kev ntxhov siab uas cov qauv tuaj yeem txuas ntxiv mus ntxiv yam tsis muaj zog ntxiv thaum lub sijhawm ncab yog hu ua qhov taw tes tawm. Yog tias lub zog poob qis, cov ntsiab lus sab saud thiab qis dua yuav tsum tau paub qhov txawv. Chav tsev ntawm qhov taw tes tawm yog N / mm2 (MPa). Upper Yield Point (σsu): Qhov siab tshaj plaws kev ntxhov siab ua ntej cov qauv yields thiab lub zog poob rau thawj zaug; Lower Yield Point (σsl): Qhov tsawg kawg nkaus kev ntxhov siab nyob rau hauv lub sij hawm tawm los thaum lub sij hawm thawj zaug tsis tau muab coj los rau hauv tus account. Qhov twg: Fs--yield quab yuam (tsis tu ncua) thaum lub sij hawm tensile txheej txheem ntawm tus qauv, N (Newton) Yog li -- qhov qub ntu ntu ntawm cov qauv, mm2.
③ Elongation tom qab tawg:(σ) Hauv qhov ntsuas tensile, qhov feem pua ntawm qhov ntev ntawm qhov ntsuas qhov ntev tau nce tom qab tus qauv tawg mus rau qhov ntsuas qhov ntev yog hu ua elongation. Qhia los ntawm σ, chav tsev yog %. Hauv cov qauv: L1- qhov ntsuas qhov ntev ntawm cov qauv tom qab tawg, hauv mm; L0- qhov ntsuas qhov ntev ntawm tus qauv, hauv mm.
④ Txo thaj tsam:(ψ) Hauv kev sim tensile, qhov feem pua ntawm qhov kev txo qis tshaj plaws ntawm qhov chaw hla ntu ntawm qhov txo txoj kab uas hla ntawm cov qauv tom qab cov qauv tawg mus rau qhov qub ntu ntu yog hu ua qhov txo qis ntawm cheeb tsam. Qhia hauv ψ, chav tsev yog %. Nyob rau hauv cov mis: S0- thawj qhov chaw hla ntu ntawm cov qauv, mm2; S1-qhov tsawg kawg nkaus qhov chaw hla ntawm qhov txo txoj kab uas hla ntawm tus qauv tom qab nws tawg, mm2.
⑤ Hardness Index:Lub peev xwm ntawm cov ntaub ntawv hlau los tiv thaiv qhov indentation ntawm cov khoom tawv ntawm qhov chaw hu ua hardness. Raws li cov kev sim sib txawv thiab cov peev txheej ntawm daim ntawv thov, hardness tuaj yeem muab faib ua Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, micro hardness thiab kub hardness. Muaj peb cov kav dej uas nquag siv: Brinell, Rockwell, thiab Vickers hardness.
Brinell hardness (HB):Siv lub pob steel los yog cemented carbide pob nrog ib txoj kab uas hla los nias nws mus rau saum npoo ntawm cov qauv nrog lub zog ntsuas (F), tshem tawm qhov kev xeem quab yuam tom qab lub sijhawm tuav, thiab ntsuas qhov indentation txoj kab uas hla ntawm qhov chaw. qauv (L). Tus nqi ntawm Brinell hardness yog qhov quotient tau los ntawm kev faib cov kev sim quab yuam los ntawm qhov chaw ntawm lub ntsej muag kheej kheej ntawm qhov indentation. Qhia hauv HBS (steel ball), chav tsev yog N / mm2 (MPa).
