Kawm Txog Cov Khoom thiab Kev Siv Cov Hlau Hlau

Jindalai (Shandong) Steel Group Co., Ltd. muaj ntau yam khoom siv tooj dag hauv qhov ntau thiab tsawg kom tau raws li qhov xav tau ntawm txhua qhov haujlwm.
1. Khoom
● Alloy Hom: Binary
● Cov ntsiab lus: Tooj & Zinc
● Ceev: 8.3-8.7 g / cm3
● Melting Point: 1652-1724 ° F (900-940 ° C)
● Moh's Hardness: 3-4

2. Cov yam ntxwv
Cov yam ntxwv ntawm cov tooj dag sib txawv nyob ntawm seb muaj pes tsawg leeg ntawm tooj dag alloy, tshwj xeeb tshaj yog tooj liab-zinc piv. Feem ntau, txawm li cas los xij, tag nrho cov tooj dag muaj nuj nqis rau lawv cov machinability lossis qhov yooj yim uas cov hlau tuaj yeem tsim rau hauv cov duab uas xav tau thiab cov ntaub ntawv thaum tuav lub zog siab.

Thaum muaj qhov sib txawv ntawm cov tooj dag nrog cov ntsiab lus zinc siab thiab qis, tag nrho cov tooj dag yog suav tias yog khoom lag luam thiab cov khoom siv (tsawg zinc brasses ntau dua). Vim nws qhov qis melting point, tooj dag kuj tuaj yeem cam khwb cia kuj yooj yim. Txawm li cas los xij, rau kev siv casting, cov ntsiab lus zinc siab feem ntau yog nyiam.

Cov tooj dag nrog cov ntsiab lus qis zinc tuaj yeem ua haujlwm txias, welded thiab brazed. Cov ntsiab lus tooj liab siab kuj tso cai rau cov hlau los tsim cov txheej txheem tiv thaiv oxide (patina) ntawm nws qhov chaw uas tiv thaiv corrosion ntxiv, yog ib qho khoom muaj txiaj ntsig hauv cov ntawv thov uas nthuav tawm cov hlau kom ya raws thiab huab cua.

Cov hlau muaj ob qho tib si zoo cua sov thiab hluav taws xob conductivity (nws cov hluav taws xob conductivity tuaj yeem yog los ntawm 23% mus rau 44% ntawm cov tooj liab ntshiab), thiab nws hnav thiab ua rau lub txim taws. Zoo li tooj liab, nws cov khoom bacteriostatic tau ua rau nws siv hauv chav da dej thiab chaw kho mob.

Brass yog suav tias yog kev sib txhuam qis thiab tsis muaj hlau nplaum, thaum nws cov khoom siv acoustic tau ua rau nws siv ntau lub suab paj nruag 'brass band'. Cov kws kos duab thiab cov kws tsim vaj tsev muaj txiaj ntsig zoo rau cov hlau zoo nkauj, vim nws tuaj yeem ua rau ntau yam xim, los ntawm cov xim liab sib sib zog nqus mus rau golden daj.

3. Cov ntawv thov
Brass cov khoom muaj txiaj ntsig thiab cov txheeb ze yooj yim ntawm kev tsim khoom tau ua rau nws yog ib qho ntawm cov khoom siv dav tshaj plaws. Kev sau ua tiav cov npe ntawm tag nrho cov kev siv tooj dag yuav yog ib txoj haujlwm loj, tab sis kom tau txais lub tswv yim ntawm kev lag luam thiab cov khoom lag luam uas pom tau tias tooj dag peb tuaj yeem txheeb xyuas thiab xaus qee qhov kev siv kawg raws li qib ntawm tooj dag siv:
● Dawb txiav tooj dag (xws li C38500 lossis 60/40 tooj dag):
● Ceev, bolts, threaded qhov chaw
● Terminals
● Dav hlau
● Kais
● Cov tshuaj txhaj tshuaj

4. Keeb kwm
Copper-zinc alloys tau tsim thaum ntxov li xyoo pua 5 BC hauv Suav teb thiab tau siv dav hauv Central Asia los ntawm 2nd thiab 3rd xyoo pua BC. Cov khoom siv hlau zoo nkauj no, txawm li cas los xij, tuaj yeem raug hu ua 'natural alloys', vim tias tsis muaj pov thawj tias lawv cov neeg tsim khoom paub txog tooj liab thiab zinc. Hloov chaw, nws zoo li cov alloys tau smelted los ntawm zinc-nplua nuj tooj liab ore, ua cov hlau zoo li tooj dag.

Cov ntaub ntawv Greek thiab Roman qhia tias kev npaj siab tsim cov alloys zoo ib yam li niaj hnub tooj dag, siv tooj liab thiab zinc oxide-nplua nuj ore hu ua calamine, tshwm sim nyob ib ncig ntawm lub xyoo pua BC.Calamine tooj dag tau tsim los ntawm kev siv cov txheej txheem cementation, uas yog tooj liab tau yaj hauv ib qho. crucible nrog av smithsonite (los yog calamine) ore.

Thaum kub kub, zinc tam sim no nyob rau hauv xws li ore hloov mus rau vapor thiab permeates tooj liab, yog li ua ib tug kuj ntshiab tooj dag nrog 17-30% zinc ntsiab lus. Txoj kev siv tooj dag no tau siv ze li ntawm 2000 xyoo mus txog rau thaum xyoo pua 19th. Tsis ntev tom qab cov neeg Loos tau tshawb pom yuav ua li cas los tsim cov tooj dag, cov hlau tau raug siv rau nyiaj npib hauv thaj chaw ntawm cov tebchaws Turkey niaj hnub no. Tsis ntev no qhov no tau nthuav dav thoob plaws tebchaws Loos.

5. Hom
'Brass' yog lub ntsiab lus dav dav uas hais txog ntau yam ntawm tooj liab-zinc alloys. Qhov tseeb, muaj ntau dua 60 ntau hom tooj dag tau teev tseg los ntawm EN (European Norm) Cov Qauv. Cov alloys no tuaj yeem muaj ntau yam sib txawv nyob ntawm cov khoom xav tau rau ib daim ntawv thov tshwj xeeb.

6. Ntau lawm
Brass feem ntau yog tsim los ntawm tooj liab seem thiab zinc ingots. Cov khib nyiab tooj liab raug xaiv raws li nws cov impurities, raws li qee cov ntsiab lus ntxiv yog xav tau txhawm rau tsim cov qib pes tsawg ntawm tooj dag xav tau.
Vim tias zinc pib boils thiab vaporizes ntawm 1665 ° F (907 ° C), hauv qab tooj liab melting point 1981 ° F (1083 ° C), tooj liab yuav tsum tau yaj ua ntej. Thaum melted, zinc yog ntxiv ntawm qhov sib piv uas tsim nyog rau qib ntawm tooj dag raug tsim. Txawm hais tias qee qhov nyiaj pub dawb tseem ua rau zinc poob rau vaporization.

Nyob rau ntawm lub sijhawm no, lwm yam hlau ntxiv, xws li txhuas, txhuas, silicon lossis arsenic, ntxiv rau qhov sib xyaw kom tsim tau cov alloy uas xav tau. Thaum lub molten alloy npaj txhij, nws yog poured rau hauv pwm qhov twg nws solidifies rau hauv loj slabs los yog billets. Billets - feem ntau ntawm alpha-beta tooj dag - tuaj yeem ncaj qha mus rau hauv cov xov hlau, cov kav dej, thiab cov raj ntawm kub extrusion, uas cuam tshuam rau kev thawb cov hlau rhuab los ntawm kev tuag, lossis kub forging.

Yog tias tsis yog extruded los yog forged, cov billets yog tom qab reheated thiab pub los ntawm steel rollers (tus txheej txheem hu ua kub dov). Qhov tshwm sim yog slabs nrog lub thickness tsawg tshaj li ib nrab nti (<13mm). Tom qab txias, cov tooj dag yog ces noj los ntawm lub tshuab milling, los yog scalper, uas txiav ib txheej nyias ntawm cov hlau thiaj li yuav tshem tawm deg casting thiab oxide.

Nyob rau hauv cov pa cua los tiv thaiv oxidization, cov hlau yog rhuab thiab dov dua, ib tug txheej txheem hu ua annealing ua ntej nws yuav dov dua nyob rau hauv txias txias (txias dov) rau nplooj ntawv ntawm txog 0.1 "(2.5mm) tuab. Cov txheej txheem txias dov deforms cov qauv hauv cov khoom siv ntawm cov tooj dag, uas ua rau cov hlau muaj zog thiab nyuaj dua cov kauj ruam no tuaj yeem rov ua dua kom txog rau thaum qhov xav tau thickness los yog hardness tiav.

Thaum kawg, cov nplooj ntawv yog sawed thiab sheared los tsim qhov dav thiab ntev xav tau. Tag nrho cov ntawv, cam khwb cia, forged, thiab extruded tooj dag cov ntaub ntawv yog muab tshuaj da dej, feem ntau, ib tug ua los ntawm hydrochloric thiab sulfuric acid, kom tshem tawm cov dub tooj liab oxide nplai thiab tarnish.

Jindalai cov ntaub ntawv tooj dag thiab coils nyob rau hauv thickness ntawm 0.05 mus rau 50mm, thiab nyob rau hauv annealed, quarter nyuaj, ib nrab nyuaj, thiab tag nrho cov tempers nyuaj. Lwm cov tempers thiab alloys kuj muaj. Xa koj cov lus nug thiab peb yuav zoo siab los sab laj koj tus kws tshaj lij.

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