Qhov twg yog 70% Cu thiab 30% Zn

1. Cov alloy twg yog 70% Cu thiab 30% Zn?

Cov alloy muaj li ntawm 70% tooj liab (Cu) thiab 30% zinc (Zn) yogtooj dag-cov tooj liab sib txawv-raws li tsev neeg alloy txhais los ntawm nws tsuas yog tso siab rau tooj liab thiab zinc ua cov khoom tseem ceeb. Tsis zoo li bronze (tooj liab- tin) lossis tooj liab-nickel (tooj liab-nickel), tooj dag tus kheej yog khi rau tooj liab-zinc ua ke, thiab qhov sib piv 70/30 no sib haum rau ib qho ntawm cov qib tooj dag siv thoob plaws ntiaj teb.

Tsim nyog raws liC26000nyob rau hauv lub Unified Numbering System (UNS) los yog "cartridge tooj dag" nyob rau hauv kev lag luam terminology, no alloy yog khoom plig rau nws cov khoom sib npaug. 70% Cu cov ntsiab lus khaws cia zoo ductility thiab corrosion kuj, thaum lub 30% Zn ntxiv txhim khu lub zog thiab machinability yam tsis muaj kev cuam tshuam kev ua haujlwm. Nws tsis yog ib qho tshwj xeeb alloy tab sis tus qauv coj mus muag qib, siv thoob plaws kev lag luam rau cov ntawv thov uas xav tau ob qho tib si formability thiab nruab nrab lub zog.

Key context: Brass alloys are categorized by their zinc content-low-zinc brass (≤30% Zn) like C26000 is ductile and easy to cold-work, while high-zinc brass (>30% Zn) nyuaj dua tab sis nkig ntau dua. Qhov 70/30 piv no zaum ntawm qhov zoo tshaj plaws rau versatility, piav qhia nws cov koob meej.

2. Cov tshuaj muaj pes tsawg leeg ntawm CUZN30 yog dab tsi?

CUZN30 yog tus qauv tooj dag, nrog rau nws cov npe muab cov ntsiab lus tseeb: "CU" (tooj liab), "ZN" (zinc), thiab "30" (nominal 30% zinc ntsiab lus). Nws cov tshuaj muaj pes tsawg leeg yog nruj tswj hwm los ntawm cov qauv thoob ntiaj teb (xws li DIN EN 12164, ASTM B111, UNS C26000) kom ntseeg tau tias kev ua haujlwm zoo ib yam. Hauv qab no yog cov ncauj lus kom ntxaws, kev lag luam- tau txais cov khoom xyaw:

Copper (Cu)68.0–71.0% (nominal 70%). Qhov no yog lub hauv paus tseem ceeb, tsim cov alloy lub hauv paus thiab ua rau corrosion kuj thiab ductility.

Zinc (Zn)29.0–32.0% (nominal 30%). Lub ntsiab alloying tseem ceeb, nws boosts lub zog, hardness, thiab machinability piv rau ntshiab tooj liab.

Minor Impurities (Qhov siab tshaj plaws):

Lead (Pb): 0.05% (kom paub meej ductility thiab tsis txhob brittleness; qee qhov qis - txhuas variants tej zaum yuav muaj kev txwv nruj dua).

Hlau (Fe): 0.05% (tiv thaiv kev tsim cov txheej txheem nyuaj, brittle intermetallic).

Nickel (Ni): 0.10% (cov lej raug zam tab sis tsis txhob txwm ntxiv).

Tin (Sn): 0.05% ( khaws cia qis kom tsis txhob muaj kev cuam tshuam corrosion nyob rau hauv dej hiav txwv los yog qhov chaw ntub dej).

Tag nrho lwm yam kab kawm: 0.30% (ntxiv ntawm tag nrho cov tsis muaj npe impurities, piv txwv li, txhuas, manganese, lossis silicon).

Cov lus ceeb toom tseem ceeb: CUZN30 yog tshuaj zoo ib yam rau C26000 (70/30 tooj dag)- qhov sib txawv tsuas yog cov lus pom zoo hauv cheeb tsam (xws li, "CUZN30" yog ib txwm nyob hauv cov qauv European, thaum "C26000" yog siv hauv North America). Cov kev sib xyaw ua ke yog ze li zoo ib yam thoob plaws cov qauv, ua kom muaj kev sib hloov hauv cov khoom siv thoob ntiaj teb.

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3. Lub hardness ntawm CUZN30 yog dab tsi?

Lub hardness ntawm CUZN30 tsis yog tus nqi ruaj khov - nws txawv txav raws li cov hlau alloy.npau taws(piv txwv li, nws cov kev kho cua sov lossis cov neeg kho tshuab ua haujlwm yav dhau los). Hardness yog ntsuas los ntawm kev ntsuas tus qauv, nrog Brinell Hardness (HB) thiab Rockwell B (HRB) yog qhov feem ntau siv rau tooj dag. Hauv qab no yog cov hardness ntau yam rau CUZN30 nyob rau hauv nws peb lub ntsiab tempers, raws li ASTM B111 thiab DIN EN 12164 tus qauv:

- Nthuav (Soft) Temper (H00/H01)

Brinell Hardness (HB): 60–80 (kuaj nrog 500 kg load thiab 10 mm pob).

Rockwell IB (HRB): 50–65.

Cov ntsiab lus: Annealing suav nrog cua sov cov hlau mus rau ~ 600-700℃thiab txias maj mam, uas txo cov kev ntxhov siab sab hauv thiab rov ua kom ductility. Qhov no temper yog mos thiab heev formable, zoo tagnrho rau daim ntaub ntawv xws li kos duab, dabtsi yog khoov, los yog sib sib zog nqus stamping (xws li, cartridge casings, daim hlau qhov chaw).

- Ib nrab- Nyuaj (Cold-Ua Haujlwm) Kub (H02)

Brinell Hardness (HB): 100–120.

Rockwell IB (HRB): 75–85.

Cov ntsiab lus: Ua tiav los ntawm kev ua haujlwm txias txias (piv txwv li, dov, kos duab) yam tsis muaj annealing. Qhov kev npau taws no sib npaug ductility thiab lub zog, haum rau kev siv dav dav - lub hom phiaj xws li fasteners, li qub, thiab cov khoom siv hluav taws xob.

- Puv-Huaj (High txias-Ua haujlwm) Kub (H04)

Brinell Hardness (HB): 140–160.

Rockwell IB (HRB): 90–95.

Cov ntsiab lus: Ua los ntawm kev ua haujlwm txias txias (Ntau dua lossis sib npaug li 50% txo qis hauv qhov hla -sectional cheeb tsam) yam tsis muaj annealing. Qhov no temper muaj lub siab tshaj plaws hardness thiab lub zog tab sis txo ductility, siv rau qhov chaw uas yuav tsum tau rigidity (xws li, springs, clips, precision Cheebtsam).

Cov alloy yog 70% Cu thiab 30% Zn