PL74836B2 - - Google Patents

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Publication number
PL74836B2
PL74836B2 PL15321972A PL15321972A PL74836B2 PL 74836 B2 PL74836 B2 PL 74836B2 PL 15321972 A PL15321972 A PL 15321972A PL 15321972 A PL15321972 A PL 15321972A PL 74836 B2 PL74836 B2 PL 74836B2
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Poland
Prior art keywords
cast iron
weight
amount
hulls
chromium
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Application number
PL15321972A
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Polish (pl)
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Priority to PL15321972A priority Critical patent/PL74836B2/pl
Publication of PL74836B2 publication Critical patent/PL74836B2/pl

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  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Pierwszenstwo: 01.02.1972 (P. 153219) Zgloszenie ogloszono: 30.05.1973 Opis patentowy opublikowano: 19.04.1975 74836 KI. 40b,37/04 MKP C22c 37/04 Twórcy wynalazku: Jerzy Jeczalik, Eugeniusz Szulc, Sylwester Kielkow- ski, Józef Prefeta Uprawniony z patentu tymczasowego: Rybnickie Zaklady Naprawcze Przemyslu Weglowego, Niedobczyce (Polska) Niskostopowe zeliwo zwlaszcza do kadlubów górnych i srodkowych podsadzarek pneumatycznych i 2 Przedmiotem wynalazku jest niskostopowe zeli¬ wo zwlaszcza do odlewania kadlubów górnych i srodkowych podsadzarek pneumatycznych, prze¬ znaczonych do podsadzania wyrobisk górniczych skruszona skala plonna o drobnej ziarnosci.Dotychczas znany kadlub górny i srodkowy w podsadzarkach pneumatycznych byly odlewane z zeliwa szarego lub zeliwa sferoidalnego.Zasadnicza wada dotychczas znanych kadlubów górnych i srodkowych podsadzarek pneumatycznych jest ich szybkie zuzycie eksploatacyjne z; uwagi na zbyt mala odpornosc na scieranie, spowodowa¬ ne tarciem pedzonej sprezonym powietrzem skaly plonnej. Powoduje to czeste awarie podsadzarek pneumatycznych oraz konieczne ich postoje dla wymiany zuzytych kadlubów.Celem wynalazku jest zmniejszenie awaryjnosci podsadzarek pneumatycznych przez unikniecie wad materialowych ich kadlubów górnych i srodko¬ wych.Zadaniem wynalazku jest opracowanie odpowied¬ niego stopu zeliwa do odlewania kadlubów gór¬ nych i srodkowych podsadzarek pneumatycznych o duzej odpornosci na scieranie, a spelniajacego cel i wymagania stawiane przez warunki eksploa¬ tacyjne w podziemiach kopaln.Cel ten zostal osiagniety przez opracowanie ni- skostopowego zeliwa zwlaszcza do kadlubów gór¬ nych i srodkowych podsadzarek pneumatycznych, zawierajacego dodatek miedzi w ilosci 1,1—1,35% 10 15 20 25 wagowo, chromu w ilosci 0,9 — 1,4% wagowo, mo¬ libdenu w ilosci 0,25% wagowo, wegla w ilosci 3,1 — 3,3% wagowo, oraz krzemu w ilosci 1,8 — — 2,2% wagowo. Ilosci wagowe miedzi i chromu stanowia stosunek 1,2 : 1.Cenna zaleta niskostopowego zeliwa wedlug wy¬ nalazku jest jego duza odpornosc na scieranie, przez co zwieksza sie znacznie zywotnosc eksploa¬ tacyjna kadlubów górnych i srodkowych, a zatem zmniejszona zostaje awaryjnosc podsadzarek pneu¬ matycznych. Zapewnia to w konsekwencji sprawna i rytmiczna prace ukladu urzadzen do podsadza- dzania wyrobisk górniczych, zatem powaznie zwie¬ ksza wydajnosc pracy.Ponizej podano przyklady receptury zeliwa ni¬ skostopowego wedlug wynalazku, w których za¬ wartosci poszczególnych skladników sa wyrazone w czesciach wagowych.Przy k] miedz chrom molibden - mangan wegiel krzem siarka fosfor zelazo — tad I — 1,2% — 1,0% — 0,25% — 0,8% — 3,2% — 1,9% — 0,1% — 0,6% reszta Przykl miedz chrom molibden mangan wegiel krzem siarka fosfor zelazo — ad II - 1,32% — 1,1% — 0,25% — 0,8% — 3,2% — 2,0% — 0,1% — 0,6% reszta go Sposób wytwarzania zeliwa niskostopowego do 74 83674 836 odlewania kadlubów górnych i srodkowch podsa- dzarek pneumatycznych polega na wytapianiu w piecu lukowym o wylozeniu kwasnym zeliwa o za¬ wartosci 3,1—3,3% wegla, 1,8—2,2% krzemu, 0,7— —1,0% manganu z dodaniem bezposrednio przed spustem zelazochromu, zelazomolibdenu i miedzi w ilosciach zapewniajacych w zeliwie zawartosc 1,1—1,35% miedzi, 0,9—1,4% chromu oraz 0,25% molibdenu. Podczas spustu nalezy zeliwo modyfi¬ kowac 75% zelazokrzemem w ilosci 0,3% plynne¬ go zeliwa. Twardosc Brinella HB otrzymanego ze¬ liwa winna wynosic 240—260 kG/mm2. PL PLPriority: 02/01/1972 (P. 153219) Application announced: 05/30/1973 Patent description was published: 04/19/1975 74836 KI. 40b, 37/04 MKP C22c 37/04 Creators of the invention: Jerzy Jeczalik, Eugeniusz Szulc, Sylwester Kielkowski, Józef Prefeta Authorized by a temporary patent: Rybnickie Zaklady Repairs Przemyslu Weglowego, Niedobczyce (Poland) Low-alloy cast iron, especially for hulls of upper and middle fillers The subject of the invention is low-alloy cast iron, especially for casting upper and middle hulls of pneumatic feeders, intended for backfilling mine workings. Crushed, fine-grained rock. The previously known upper and middle hulls in pneumatic feeders were cast of gray iron or cast iron. The main disadvantage of the previously known upper and middle hulls of pneumatic feeders is their quick wear and tear from; due to too low abrasion resistance caused by the friction of the air-driven yielding scale. This causes frequent failures of pneumatic propellers and the necessary downtime to replace worn hulls. The aim of the invention is to reduce the failure rate of pneumatic propellers by avoiding material defects of their upper and middle hulls. The aim of the invention is to develop a suitable cast iron alloy for casting upper and middle hulls. central pneumatic propellers with high abrasion resistance, and meeting the purpose and requirements of the operating conditions in the mine underground. This goal was achieved by the development of low-alloy cast iron, especially for upper hulls and middle pneumatic propellers, containing copper in the amount of 1.1-1.35 wt% 10 15 20 25 wt%, 0.9-1.4 wt% chromium, 0.25 wt% molybdenum, 3.1-3.3 wt% carbon , and silicon in an amount of 1.8 - - 2.2% by weight. The weight amounts of copper and chromium are a ratio of 1.2: 1. The valuable advantage of low-alloy cast iron according to the invention is its high abrasion resistance, which significantly increases the service life of the upper and middle hulls, and thus reduces the failure rate of pneumatic propellers. mats. As a consequence, this ensures efficient and rhythmic work of the system of devices for backfilling mining excavations, thus significantly increasing the work efficiency. Below are examples of low-alloy cast iron recipes according to the invention, in which the contents of individual components are expressed in parts by weight. k] copper chromium molybdenum - manganese carbon silicon sulfur phosphorus iron - tad I - 1.2% - 1.0% - 0.25% - 0.8% - 3.2% - 1.9% - 0.1% - 0.6% rest Case copper chromium molybdenum manganese carbon silicon sulfur phosphorus iron - ad II - 1.32% - 1.1% - 0.25% - 0.8% - 3.2% - 2.0% - 0.1% - 0.6% of the rest The method of producing low-alloy cast iron for casting of the upper hulls and middle pneumatic feeders consists in smelting in an acid-lined arc furnace of cast iron with a content of 3.1-3.3% carbon, 1.8-2.2% silicon, 0.7-1.0% manganese with the addition of ironochrome, iron molybdenum and copper immediately before tapping in amounts ensuring the content of 1.1-1.35% copper in cast iron, 0, 9-1.4% chromium and 0.25% molybdenum. During the tapping, the cast iron shall be modified with 75% ferrosilicon in the amount of 0.3% of the liquid cast iron. The Brinell hardness (HB) of the cast iron obtained should be 240-260 kg / mm 2. PL PL

Claims (1)

1. Zastrzezenie patentowe Niskostopowe zeliwo zwlaszcza do kadlubów gór¬ nych i srodkowych podsadzarek pneumatycznych, znamienne tym, ze zelazo zawiera dodatek miedzi w ilosci 1,1 do 1,25% wagowo, chromu w ilosci 0,9 do 1,4% wagowo, molibdenu w ilosci 0,25% wagowo, wegla w ilosci 3,1 do 3,3% wagowo oraz krzemu w ilosci 1,8 do 2,2% wagowo, przy czym ilosci wagowe miedzi i chromu stanowia stosunek 1,2 :1. Patent claim Low-alloy cast iron, especially for the upper and middle hulls of pneumatic propellers, characterized by the fact that the iron contains copper in the amount of 1.1 to 1.25% by weight, chromium in the amount of 0.9 to 1.4% by weight, molybdenum in the amount of 0.25% by weight, carbon in the amount of 3.1 to 3.3% by weight and silicon in the amount of 1.8 to 2.2% by weight, with the amounts of copper and chromium being the ratio of 1.2: 1. W.D.Kart. C/1503/74, 120+15, A4 Cena 10 zl PL PL1. W.D. Card. C / 1503/74, 120 + 15, A4 Price PLN 10 PL PL
PL15321972A 1972-02-01 1972-02-01 PL74836B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15321972A PL74836B2 (en) 1972-02-01 1972-02-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL15321972A PL74836B2 (en) 1972-02-01 1972-02-01

Publications (1)

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PL74836B2 true PL74836B2 (en) 1974-12-31

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