Mkuwa
Kugwiritsa ntchito mkuwa ndi mkuwa kunayamba zaka mazana ambiri zapitazo, ndipo masiku ano kumagwiritsidwa ntchito muukadaulo ndi ntchito zina zamakono pomwe kumagwiritsidwabe ntchito ngati zida zachikhalidwe monga zida zoimbira, eyelets zamkuwa, zinthu zokongoletsera, ndi zida zopopera ndi zitseko.
Kodi Mkuwa Umapangidwa ndi Chiyani?
Mkuwa ndi aloyi wopangidwa kuchokera ku kuphatikiza kwa mkuwa ndi zinc kuti apange zinthu zomwe zimagwiritsidwa ntchito m'njira zosiyanasiyana. Kapangidwe ka mkuwa kamapatsa chitsulo malo osungunula oyenera kugwiritsidwa ntchito m'njira zambiri, kuphatikizapo oyenera kulumikiza pogwiritsa ntchito njira yopangira brazing. Malo osungunula a mkuwa ndi otsika kuposa mkuwa pafupifupi madigiri 920 ~ 970 Celsius kutengera kuchuluka kwa Zn yowonjezera. Malo osungunula a mkuwa ndi otsika kuposa a mkuwa chifukwa cha Zn yowonjezera. Ma aloyi a mkuwa amatha kusiyanasiyana mu kapangidwe ka Zn kuyambira 5% (yomwe imadziwikanso kuti Gilding Metals) mpaka kupitirira 40% monga momwe imagwiritsidwira ntchito mu machining brasses. Mawu omwe amagwiritsidwa ntchito kwambiri ndi bronze ya mkuwa, komwe zowonjezera zina za tin zimagwiritsidwa ntchito.
Kodi mkuwa umagwiritsidwa ntchito pa chiyani?
Kapangidwe ka mkuwa ndi kuwonjezera zinc ku mkuwa kumawonjezera mphamvu ndikupereka makhalidwe osiyanasiyana, zomwe zimapangitsa kuti mkuwa ukhale wosiyanasiyana kwambiri. Umagwiritsidwa ntchito chifukwa cha mphamvu zawo, kukana dzimbiri, mawonekedwe ndi mtundu, komanso kusavuta kugwira ntchito ndi kulumikizana. Mkuwa wa single phase alpha, wokhala ndi pafupifupi 37% Zn, ndi wofewa kwambiri komanso wosavuta kugwira ntchito mozizira, wolukidwa ndi wothira. Mkuwa wa dual phase alpha-beta nthawi zambiri umagwiritsidwa ntchito potentha.
Kodi pali zinthu zambiri zopangidwa ndi mkuwa?
Pali mabras ambiri okhala ndi mitundu yosiyanasiyana ndi makhalidwe osiyanasiyana omwe amapangidwira ntchito zinazake malinga ndi kuchuluka kwa zinc. Magawo otsika a kuwonjezera kwa Zn nthawi zambiri amatchedwa Guilding Metal kapena Red Brass. Ngakhale kuti magawidwe apamwamba a Zn ndi ma alloy monga Cartridge Brass, Free Machining Brass, Naval Brass. Mabras awa amtsogolo alinso ndi zinthu zina zowonjezera. Kuwonjezera kwa lead ku brass kwakhala kukugwiritsidwa ntchito kwa zaka zambiri kuthandiza makina a zinthuzo poyambitsa ma chip break points. Popeza chiopsezo ndi zoopsa za lead zadziwika, posachedwapa zasinthidwa ndi zinthu monga silicon ndi bismuth kuti zikhale ndi mawonekedwe ofanana a machining. Izi tsopano zimadziwika kuti ndi mabras otsika kapena lead free.
Kodi zinthu zina zingawonjezedwe?
Inde, zinthu zina zochepa zosakaniza zimatha kuwonjezeredwa ku mkuwa ndi mkuwa. Zitsanzo zachizolowezi ndi monga momwe tafotokozera pamwambapa, komanso arsenic yolimbana ndi dzimbiri, tin yolimbana ndi dzimbiri komanso dzimbiri.
Mtundu wa Mkuwa
Pamene kuchuluka kwa zinc kukuwonjezeka, mtundu umasintha. Ma alloy otsika a Zn nthawi zambiri amatha kufanana ndi mkuwa, pomwe ma alloy ambiri a zinc amaoneka ngati agolide kapena achikasu.
Kapangidwe ka Mankhwala
AS2738.2 -1984 Mafotokozedwe ena ofanana ndi awa
| Nambala ya UNS | AS Ayi | Dzina Lodziwika | Nambala ya BSI | ISO No | JIS No | Mkuwa % | Zinki % | % ya otsogolera | Ena % |
| C21000 | 210 | 95/5 Gilding Metal | - | CuZn5 | C2100 | 94.0-96.0 | ~ 5 | <0.03 | |
| C22000 | 220 | 90/10 Chitsulo Chopangira Miyala | CZ101 | CuZn10 | C2200 | 89.0-91.0 | ~ 10 | < 0.05 | |
| C23000 | 230 | 85/15 Chitsulo Chopangira Miyala | CZ102 | CuZn15 | C2300 | 84.0-86.0 | ~ 15 | < 0.05 | |
| C24000 | 240 | 80/20 Chitsulo Chopangira Miyala | CZ103 | CuZn20 | C2400 | 78.5-81.5 | ~ 20 | < 0.05 | |
| C26130 | 259 | 70/30 Mkuwa wa Arsenical | CZ126 | CuZn30As | ~C4430 | 69.0-71.0 | ~ 30 | < 0.07 | Arsenic 0.02-0.06 |
| C26000 | 260 | 70/30 Mkuwa | CZ106 | CuZn30 | C2600 | 68.5-71.5 | ~ 30 | < 0.05 | |
| C26800 | 268 | Mkuwa Wachikasu (65/35) | CZ107 | CuZn33 | C2680 | 64.0-68.5 | ~ 33 | < 0.15 | |
| C27000 | 270 | Waya wa 65/35 Waya | CZ107 | CuZn35 | - | 63.0-68.5 | ~ 35 | < 0.10 | |
| C27200 | 272 | 63/37 Mkuwa Wamba | CZ108 | CuZn37 | C2720 | 62.0-65.0 | ~ 37 | < 0.07 | |
| C35600 | 356 | Mkuwa Wosema, 2% Lead | - | CuZn39Pb2 | C3560 | 59.0-64.5 | ~ 39 | 2.0-3.0 | |
| C37000 | 370 | Mkuwa Wosema, 1% Lead | - | CuZn39Pb1 | ~C3710 | 59.0-62.0 | ~ 39 | 0.9-1.4 | |
| C38000 | 380 | Mkuwa wa Gawo | CZ121 | CuZn43Pb3 | - | 55.0-60.0 | ~ 43 | 1.5-3.0 | Aluminiyamu 0.10-0.6 |
| C38500 | 385 | Mkuwa Wodula Waulere | CZ121 | CuZn39Pb3 | - | 56.0-60.0 | ~ 39 | 2.5-4.5 |
Ma Brass nthawi zambiri amagwiritsidwa ntchito pa mawonekedwe awo
| Nambala ya UNS | Dzina Lodziwika | Mtundu |
| C11000 | Mkuwa wa ETP | Pinki Wofewa |
| C21000 | 95/5 Gilding Metal | Brown Wofiira |
| C22000 | 90/10 Chitsulo Chopangira Miyala | Golide Wamkuwa |
| C23000 | 85/15 Chitsulo Chopangira Miyala | Golide Wofiirira |
| C26000 | 70/30 Mkuwa | Golide Wobiriwira |
Chitsulo Chokongoletsera
Chitsulo cha C22000, 90/10 Gilding, chimaphatikiza mtundu wagolide wolemera ndi kuphatikiza kwabwino kwambiri kwa mphamvu, kusinthasintha, ndi kukana dzimbiri kwa ma alloys osavuta a Cu-Zn. Chimapirira mpaka mtundu wa bronze wolemera. Chili ndi luso lojambula lakuya kwambiri, komanso chimalimbana ndi dzimbiri m'malo ovuta komanso m'madzi. Chimagwiritsidwa ntchito popanga zinthu zokongoletsa, zodzikongoletsera, zokongoletsera, zogwirira zitseko, ma escutcheons, ndi zida zam'madzi.
Zamkuwa zachikasu
C26000, 70/30 Brass ndi C26130, Arsenical brass, ali ndi ductility yabwino kwambiri komanso mphamvu, ndipo ndi mabrass omwe amagwiritsidwa ntchito kwambiri. Arsenical brass ili ndi arsenic yaying'ono yowonjezera, yomwe imawonjezera kwambiri kukana dzimbiri m'madzi, koma mwanjira ina imafanana kwambiri. Ma alloy awa ali ndi mtundu wachikasu wowala womwe nthawi zambiri umagwirizana ndi mkuwa. Ali ndi kuphatikiza kwabwino kwa mphamvu ndi ductility mu Cu-Zn alloys, kuphatikiza ndi kukana dzimbiri kwabwino. C26000 imagwiritsidwa ntchito popanga zomangamanga, zotengera ndi mawonekedwe okokedwa ndi kupota, ma terminal amagetsi ndi zolumikizira, zogwirira zitseko, ndi zida zama plumber. C26130 imagwiritsidwa ntchito popanga machubu ndi zolumikizira zomwe zimakumana ndi madzi, kuphatikiza madzi akumwa.
C26800, Yellow brass, ndi single phase alpha brass yokhala ndi mkuwa wochepa kwambiri. Imagwiritsidwa ntchito pomwe mawonekedwe ake ozama komanso mtengo wotsika amapereka mwayi. Tinthu ta beta phase tikamalumikizidwa, timachepetsa kulimba kwa ductility ndi kukana dzimbiri.
Ma Brass okhala ndi zinthu zina
C35600 ndi C37000, mkuwa wolembera, ndi mkuwa wa alpha-beta wa 60/40 wokhala ndi milingo yosiyanasiyana ya lead yowonjezeredwa kuti ipereke mawonekedwe osavuta opangira. Amagwiritsidwa ntchito kwambiri pa mbale zojambulidwa ndi ma plaque, zida zomangira, ndi magiya. Siziyenera kugwiritsidwa ntchito pa ntchito yojambulidwa ndi asidi, yomwe mkuwa wa alpha wa gawo limodzi uyenera kugwiritsidwa ntchito.
C38000, Section brass, ndi lead alpha/beta brass yotha kuchotsedwa mosavuta yokhala ndi aluminiyamu yaying'ono, yomwe imapereka mtundu wowala wagolide. Lead imapereka mawonekedwe odulira omasuka. C38000 imapezeka ngati ndodo zotulutsidwa, njira, ma flat ndi ma angles, zomwe nthawi zambiri zimagwiritsidwa ntchito mu hardware yomanga.
C38500, mkuwa wodula, ndi mtundu wabwino kwambiri wa mkuwa wa 60/40, wokhala ndi mawonekedwe abwino kwambiri odulira momasuka. Umagwiritsidwa ntchito popanga zinthu zambiri zamkuwa komwe kumafunika mphamvu zambiri komanso nthawi yayitali ya zida, komanso komwe sikufunika kuzizira kwambiri pambuyo pa makina.
Mndandanda wa Zogulitsa Zamkuwa
● Fomu Yogulitsa
● Zinthu zozungulira zosalala
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Nthawi yotumizira: Disembala-19-2022
