C28000 tooj liab khoom yog dab tsi

1. Cov khoom siv dab tsi yog C28000?

C28000 yog asiab - zoo zoo daj tooj dag alloy(UNS lub npe) yog cov tooj liab-zinc (Cu-Zn) alloy tsev neeg, dav lees paub rau nws qhov zoo tshaj plaws ntawm kev sib npaug ntawm ductility, machinability, corrosion resistance, and cost{2}}effectiveness. Nws yog feem ntau teev nyob rau hauv cov qauv thoob ntiaj teb xws li ASTM B111 (rod / bar), ASTM B134 (daim ntawv / phaj), thiab EN 12164 (tus qauv European), ua rau nws muaj ntau yam khoom siv rau kev lag luam thiab kev lag luam.

Cov yam ntxwv ntawm cov khoom tseem ceeb:

Alloy Qeb: Nruab nrab-zinc tooj dag (zinc cov ntsiab lus ~ 33-37%), cais raws li "Muntz hlau" nyob rau hauv qee cov ntsiab lus hauv cheeb tsam (txawm hais tias Muntz hlau feem ntau yog hais txog ntau dua -zinc variants, C28000 yog ib qho kev xaiv nruab nrab nrov).

Core Properties:

Ductility: Zoo heev formability rau dabtsi yog khoov, stamping, thiab sib sib zog nqus daim duab, haum rau complex -zoo li tus Cheebtsam.

Machinability: Superior to low-zinc brasses (piv txwv li, C23000 liab tooj dag), ua kom zoo tig, milling, thiab drilling.

Corrosion Resistance: Zoo tiv thaiv atmospheric corrosion, dej tshiab, thiab tshuaj me me; haum rau kev siv sab hauv tsev thiab sab nraum zoov (tsis txhob raug dej ntsev ntev ntev tshwj tsis yog muaj kev tiv thaiv).

Weldability: Tau tshaj brazing thiab soldering; arc vuam tsis pom zoo vim zinc evaporation.

Tej kev siv:

Cov kav dej & HVAC: Fittings, li qub, kav, thiab connectors.

Hardware & Fasteners: Txiv ntseej, bolts, screws, thiab cov khoom siv kho kom zoo nkauj.

Hluav taws xob: Terminals, connectors, thiab hloov Cheebtsam.

Industrial: Machinery qhov chaw, iav, thiab ntsuas vaj tse.

2. Cov tshuaj muaj pes tsawg leeg ntawm C28000 yog dab tsi?

Cov tshuaj muaj pes tsawg leeg ntawm C28000 yog nruj me ntsis tswj los ntawm thoob ntiaj teb cov qauv los xyuas kom meej kev ua tau zoo. Hauv qab no yog cov ncauj lus kom ntxaws muaj pes tsawg leeg (feem pua nce) rau ASTM B111 thiab UNS specifications:

Element	Yam tsawg kawg nkaus	Cov ntsiab lus siab kawg	Sau ntawv
Copper (Cu)	63.0%	66.0%	Cov khoom tseem ceeb muab ductility thiab corrosion kuj.
Zinc (Zn)	33.0%	37.0%	Txhim khu lub zog thiab machinability; balanced ratio rau kev ua tau zoo.
Lead (Pb)	0.05%	0.35%	Txheeb ntxiv los txhim kho machinability (dawb-txiav sib txawv muaj nrog Pb siab dua yog tias xav tau).
Hlau (Fe)	-	0.10%	Kev tswj nruj nruj kom tsis txhob brittleness thiab tswj cov khoom ruaj khov.
Nickel (Ni)	-	0.50%	Tso cai kab impurity; tsis txhob txwm siab ntxiv.
Tin (Sn)	-	0.25%	Me impurity; tej zaum yuav ntxiv me me los txhim kho corrosion kuj.
Tag nrho cov impurities	-	0.50%	Tag nrho cov ntsiab lus (tsis suav Cu, Zn, thiab Pb) yuav tsum tsis pub tshaj 0.50%.

3. Qhov Hardness ntawm C28000 yog dab tsi?

Lub hardness ntawm C28000 feem ntau yog txiav txim los ntawm nwstemper (txheej txheem txheej txheem)-annealed, txias-ua haujlwm, lossis cua sov- kho. Hauv qab no yog cov nqi hardness ib txwm ( ntsuas los ntawm Brinell Hardness (HB) lossis Rockwell Hardness (HRB)) rau kev npau taws, ua raws li cov qauv kev lag luam:

Temper Designation	Txoj kev ua	Brinell Hardness (HB)	Rockwell Hardness (HRB)	Cov khoom tseem ceeb
Kev sib xyaw ua ke (ASTM O)	Cov cua sov rau 600-650 ° C, tuav rau 1-2 teev, thiab txias txias kom txo tau cov kev ntxhov siab sab hauv.	60-80 HB	50-70 PAB	Lub xeev softest; Maximum ductility rau kev sib sau / stamping.
Ib nrab -Hard (ASTM H01)	Kev ua haujlwm txias ib nrab (15-25% txo qis hauv cheeb tsam hla ntu) tom qab annealing.	90-110 HB	75-85 PAB	Sib npaug zog thiab ductility; dav dav -cov ntaub ntawv siv.
Hard (ASTM H02)	Kev ua haujlwm txias txias (25-35% txo) tom qab annealing.	120-140 HB	88-95 IB	Lub zog siab rau cov khoom siv thiab cov fasteners.
Ntxiv -Hard (ASTM H04)	Severe cold working (>35% txo) tom qab annealing.	150-170 HB	96-100 IB	Qhov siab tshaj plaws hardness; ductility tsawg kawg nkaus rau siab -cov ntsiab lus kev ntxhov siab.