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PL129198B1 - Corrosion resistant lead brass - Google Patents

Corrosion resistant lead brass Download PDF

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Publication number
PL129198B1
PL129198B1 PL23004981A PL23004981A PL129198B1 PL 129198 B1 PL129198 B1 PL 129198B1 PL 23004981 A PL23004981 A PL 23004981A PL 23004981 A PL23004981 A PL 23004981A PL 129198 B1 PL129198 B1 PL 129198B1
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PL
Poland
Prior art keywords
lead
arsenic
weight
alloy
corrosion resistant
Prior art date
Application number
PL23004981A
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Polish (pl)
Other versions
PL230049A1 (en
Inventor
Henryk Kleczek
Henryk Orzechowski
Krzysztof Dobrowolski
Jozef Sliwa
Stanislaw Machalica
Original Assignee
Zaklady Hutniczo Przetworcze M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Zaklady Hutniczo Przetworcze M filed Critical Zaklady Hutniczo Przetworcze M
Priority to PL23004981A priority Critical patent/PL129198B1/en
Publication of PL230049A1 publication Critical patent/PL230049A1/xx
Publication of PL129198B1 publication Critical patent/PL129198B1/en

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Description

Przedmiotem wynalazku jest mosiadz olowiowy odporny na korozje. Znajduje on zastosowanie w przemysle armaturowym do wykonywania elementów armatury pracujacych w srodowisku wody mor¬ skiej lub innego medium korozyjnego bedacego w stanie cieklym lub gazowym. Znane sa stopy mosiadzów olowiowych, cynowych i aluminiowych z niewielka zawartoscia olowiu i arsenu, poda¬ tne na obróbke skrawaniem, obróbke plastyczna oraz odporne na korozje. Znany stop zawiera wagowo 60-66 % miedzi, 1-3f5 % olowiu, 1-1,8 % aluminium, 0,02-0,04 # arsenu, reszta cynk.Jednakze znane stopy nie posiadaja wszystkich wymaganych wlasnosci równoczesnie. Znane mosia¬ dze cynowe i aluminiowe sa odporne na korozje jednak nie sa podatne na obróbke skrawaniem.Natomiast znane mosiadze olowiowe wykazuja dobra podatnosc na obróbke skrawaniem ale nie po¬ siadaja odpornosci na korozje. Znany jest równiez stop z patentu szwedzikiego nr 198 579 zawie¬ rajacy wagowo 55-67 # miedzi, 21-44 % cynku, 0,3-^fO % olowiu, 0,1-4,0 % aluminium, 0,1-4 % cyny, 0,01-0,50 % arsenu. Stop ten tez nie spelnia wymaganych wlasnosci.Celem wynalazku jest opracowanie stopu charakteryzujacego sie równoczesnie wysoka odpor¬ noscia na korozje, dobra podatnoscia do obróbki skrawaniem i przeróbki plastycznej. Zalozony cel zostal osiagniety przez opracowanie stopu mosiadzu olowiowego zawierajacego wagowo 60 - - 66 % miedzi, 1-3,5 % olowiu, 0,1-1,5 % aluminium, 0,1-1 % niklu, 0,1-0,25 % arsenu, resz¬ ta cynk.Mosiadz olowiowy wedlug wynalazku topi sie znanymi sposobami w piecach elektrycznych in¬ dukcyjnych i odlewa sie sposobem ciaglym lub pólciaglym. Skladniki stopowe wprowadza sie do plynnej kapieli metalowej stanowiacej stopiony mosiadz, przy czym ilosc zlomów i odpadów we wsadzie nie moze przekraczac 40 % wagowej ilosci wsadu piecowego. Aluminium, nikiel i arsen wprowadza sie do kapieli metalowej w postaci czystej lub stopów wstepnych CuAl, CuNi i CuAs.Arsen jest wtapiany jako ostatni skladnik stopowy przed odlewaniem. Odlany wlewek jest dalej obrabiany plastycznie na goraco poprzez prasowanie wzglednie kucie dla otrzymania pretów lub plaskowników, z których wykonuje sie elementy armatury.|Z_ 129 198- - Mosiadz olowiowy-^edlug—wynalazku-^harakteryzuJe--sie- wysokimi wlasnosciami... an-tykorozyjnyJ mi, podatnoscia do kucia i prasowania na goraco oraz dobra podatnoscia do obróbki skrawaniem Ponadto stop ten jest szczególnie odporny na odcynkowanie, korozje wzerowa i niedzykrystali- czna. Wysoka podatnosc na odksztalcanie plastyczne oraz obróbke wiórowa umozliwiaja wykonywa nie z tego stopu skomplikowanych detali armaturowych takich jak trójniki, zlaczki, kolanka, zawory.- Przyklad I. Mosiadz olowiowy zawiera wagowo 63»5 % miedzi, 1,5 % olowiu, 0,3 % aluminium, 0,1 % niklu, 0,10 % arsenu, reszta cynk. Stop ten otrzymuje sie w ten sposób, ze do stopionego w piecu elektrycznym wsadu zawierajacego miedz, cynk i odpady mosiezne wtapia sie kolejno w temperaturze 1373°K stop wstepny CuAl, CuNi, olów oraz stop wstepny CuAs a na¬ stepnie odlewa sie wlewki. Odlewane wlewki wyciska sie na prasie hydraulicznej w temperatu¬ rze 1013°K na Drety.Przyklad II. Mosiadz olowiowy zawiera wagowo 60 % miedzi, 3,5 % olowiu, 1,5 % a]Lu- minium, 0,9 % niklu, 0,2 % arsenu, reszta cynk. Stop ten otrzymuje sie w ten sposób, ze do stopionego w piecu elektrycznym wsadu zawierajacego miedz, odpady mosiezne wtapia sie kolejn£ w temperaturze 1383°K aluminium, olów, cynk, nikiel oraz arsen, a po wtopieniu odlewa sie wlewki. Odlewane wlewki wyciska sie na prasie hydraulicznej w temperaturze 1040°K.I Zastrzezenie patentowe i i i Mosiadz olowiowy odporny na korozje zawierajacy wagowo 60-66 % miedzi, 1-35 % olowiu, aluminium, arsen, reszta cynk, znamienny tym, ze zawiera wagowo 0,1-1,5 % alu-| minium, 0,1-0,25 % arsenu, 0,1-1 % niklu.Pracowni* Poligraficzna UP PRL. Naklad 100 egz.Cena 100 zl PLThe present invention relates to corrosion-resistant lead brass. It is used in the armature industry for the production of fittings working in the environment of sea water or other corrosive medium being in a liquid or gaseous state. There are known lead, tin and aluminum brass alloys with a low content of lead and arsenic, which are suitable for machining, plastic working and resistant to corrosion. The known alloy contains 60-66% by weight of copper, 1-3-5% lead, 1-1.8% aluminum, 0.02-0.04% arsenic, the rest zinc. However, the known alloys do not have all the required properties at the same time. The known tin and aluminum brasses are corrosion resistant but not machinable. The known lead bras, on the other hand, show good machinability but do not have corrosion resistance. There is also known an alloy from Swedish patent No. 198,579 containing 55-67% by weight of copper, 21-44% zinc, 0.3-4% lead, 0.1-4.0% aluminum, 0.1-4 % tin, 0.01-0.50% arsenic. This alloy also does not meet the required properties. The aim of the invention is to develop an alloy that is characterized by high corrosion resistance, machinability and plastic forming at the same time. The assumed goal was achieved by developing a lead brass alloy containing 60-66% by weight of copper, 1-3.5% of lead, 0.1-1.5% of aluminum, 0.1-1% of nickel, 0.1-0, 25% of arsenic, the rest is zinc. According to the invention, lead brass is melted by known methods in induction electric furnaces and is cast in a continuous or semi-continuous manner. The alloy components are introduced into a liquid metal bath consisting of molten brass, where the amount of scrap and waste in the charge may not exceed 40% by weight of the amount of the furnace charge. Aluminum, nickel and arsenic are introduced into the metal bath in pure form or the CuAl, CuNi and CuAs pre-alloys. Arsenic is fused as the last alloying component before casting. The cast ingot is further processed hot by pressing or forging to obtain rods or flat bars, from which the fittings are made. anti-corrosive, hot forging and hot pressing and good machinability. Moreover, the alloy is particularly resistant to dezincification, peeling and non-intergranular corrosion. High susceptibility to plastic deformation and machining enable the production of complex fittings such as tees, couplings, elbows, valves from this alloy. - Example I. Lead brass contains 63 »5% by weight of copper, 1.5% lead, 0.3 % aluminum, 0.1% nickel, 0.10% arsenic, the rest zinc. This alloy is obtained in such a way that the charge containing copper, zinc and brass waste, melted in an electric furnace, is successively melted at a temperature of 1373 ° K of a preliminary alloy of CuAl, CuNi, lead and a preliminary alloy of CuAs, and ingots are poured stepwise. Cast ingots are extruded on a hydraulic press at a temperature of 1013 ° K into Drety. Example II. Lead brass contains 60% by weight of copper, 3.5% of lead, 1.5% of a] Lu- minium, 0.9% of nickel, 0.2% of arsenic, the rest zinc. This alloy is obtained in such a way that a further aluminum, lead, zinc, nickel and arsenic material is melted into the charge containing copper in an electric furnace, and the ingots are cast after fusing. The cast ingots are pressed on a hydraulic press at a temperature of 1040 ° KI. Claim iii Corrosion-resistant lead brass containing 60-66% by weight of copper, 1-35% lead, aluminum, arsenic, the rest zinc, characterized by the fact that it contains 0.1 by weight -1.5% alu- | minium, 0.1-0.25% arsenic, 0.1-1% nickel. Pracownia * Poligraficzna UP PRL. Mintage 100 copies Price PLN 100 PL

Claims (1)

Zastrzezenie patentowe i i i Mosiadz olowiowy odporny na korozje zawierajacy wagowo 60-66 % miedzi, 1. -35 % olowiu, aluminium, arsen, reszta cynk, znamienny tym, ze zawiera wagowo 0,1-1,5 % alu-| minium, 0,1-0,25 % arsenu, 0,1-1 % niklu. Pracowni* Poligraficzna UP PRL. Naklad 100 egz. Cena 100 zl PLClaim i i i Corrosion resistant lead brass containing 60-66% by weight of copper, 1. -35% by weight of lead, aluminum, arsenic, the remainder zinc, characterized by the fact that it contains 0.1-1.5% by weight of alumina. minium, 0.1-0.25% arsenic, 0.1-1% nickel. Pracownia * Poligraficzna UP PRL. Mintage 100 copies. Price PLN 100 PL
PL23004981A 1981-03-06 1981-03-06 Corrosion resistant lead brass PL129198B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL23004981A PL129198B1 (en) 1981-03-06 1981-03-06 Corrosion resistant lead brass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL23004981A PL129198B1 (en) 1981-03-06 1981-03-06 Corrosion resistant lead brass

Publications (2)

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PL230049A1 PL230049A1 (en) 1982-09-13
PL129198B1 true PL129198B1 (en) 1984-04-30

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PL230049A1 (en) 1982-09-13

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