PL108292B1 - ABRASION RESISTANT MN-CR-MO CAST STEEL MANGANESE-CHROME-MOLIBDEN STEEL - Google Patents

ABRASION RESISTANT MN-CR-MO CAST STEEL MANGANESE-CHROME-MOLIBDEN STEEL Download PDF

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Publication number
PL108292B1
PL108292B1 PL19169476A PL19169476A PL108292B1 PL 108292 B1 PL108292 B1 PL 108292B1 PL 19169476 A PL19169476 A PL 19169476A PL 19169476 A PL19169476 A PL 19169476A PL 108292 B1 PL108292 B1 PL 108292B1
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Poland
Prior art keywords
steel
cast steel
manganese
molibden
chrome
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Application number
PL19169476A
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Polish (pl)
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PL191694A1 (en
Inventor
Waclaw Sakwa
Stanislaw Jura
Tadeusz Chroszcz
Jozef Czepiel
Ryszard Kowalczyk
Original Assignee
Politechnika Slaska Im Wincent
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 Politechnika Slaska Im Wincent filed Critical Politechnika Slaska Im Wincent
Priority to PL19169476A priority Critical patent/PL108292B1/en
Publication of PL191694A1 publication Critical patent/PL191694A1/en
Publication of PL108292B1 publication Critical patent/PL108292B1/en

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Description

Opis patentowy opublikowano: 16.03.1981 108292 Int. CL2 C22C 38/38 Twórcy wynalazku: Waclaw Sakwa, Stanislaw Jura, Tadeusz Chrószcz, Józef Czepiel, Ryszard Kowalczyk Uprawniony z patentu: Politechnika Slaska im. Wincentego Pstrowskie¬ go, Gliwice (Polska) Staliwo manganowo-chromowo-molibdenowe odporne na scieranie Praedimiotem wynalazku jest staliwo mangano- wo^hromcwo-molibdenowe odporne na scieranie.Znane jest staliwo manganowe odipome na scie¬ ranie o zawartosci wagowej 1,0—"1,4°/o C, 10—14% Mn, 0,5% Si, lub staliwo o zawartosci wagowej 1,0—0.,2% C, 6—8% Mn.-Istnieja równiez odmiany tych staliw zawierajace dodatkowo 0,5—2,0% Mo.Charakterystyczna cecha tych itworzyw jest struktura austenityczna o twardosci okolo 200 HB.Odpornosc na scieranie oraz wzrost twardosci two¬ rzywa te uzyskuja po zgniocie. Dzieki tej zalecie tworzywa te maja szerokie zastosowanie do pracy w warunkach silnego zgniotu {powierzchniowego.Utwardzenie powierzchniowe wzrasta do 400—500 HV. Zakres umocnienia jest jednak niewystarcza¬ jacy i celowym jest uzyskanie wyzszej twardosci, a tym samym odpornosci na scieranie.Staliwo manganowo-chromowo^molibdenowe od¬ porne na scieranie wedlug wynalazku zawiera w procentach wagowych 0,8—.1,41% wegla, 5,0—8,0% manganu, 1,0-^3,5% chromu, 0,5—2,0% molibdenu, 0,3—0,81% krzemu, reszte zelazo.Staliwo mariganowo-chrornowo^molibdenowe we¬ dlug wynalazku posiada strukture austenityczna, jednak ipo przesyceniu posiada wysoka twardosc która po zgniocie dodatkowo wzrasta. Utwardzenie po przesycaniu osiajga glebokosc do 50 mm, co w wystarczajacy sposób podwyzsza odpornosc sta¬ liwa na zuzycie scierne. W porównaniu do staliw 10 15 2 austenitycznych dotychczas stosowanych odpornosc na zuzycie scierne wzrosla 2—3 razy.Przykladowy sklad chemiczny staliwa mangano- wo-chromowo-moli/bdenowego wedlug wynalazku w % wagowych jest nastepujacy: Staliwo I. 1,05% C, 6,2% Mn, 2,1% Or, 0,8% Mo, 0,4% Si, 0,03% S, 0,07% P Staliwo II. 1,22% C, 6,8% Mh, 2,7% Or, 1,1% Mo, 0,4% Si, 0,03% S, 0,07% P Niektóre wlasciwosci mechaniczne sa nastepu¬ jace: Staliwo I Staliwo II 240 HV50 250 HVso twardosc po odlaniu twardosc po przesycaniu z temp. 1050°C udarnosc po odlaniu udarnosc po przesycaniu z temp. 1050°C twardosc po zgniocie 30% staliwa przesyconego 480 HV5o 20 J/cm2 520 HVso 25 J/om2 48 J/cm2 52 J/om2 560 HV50 580 HVso Próba hartownosci wedlug Jominy wykazala, ze tworzywo to utwardza sie przy chlodzeniu i uzy¬ skuje twardosc ok. 50 HRC na glebokosc do 50 mm.Jest to bardzo duza zaleta tego tworzywa ponie¬ waz utwardzenie uzyskuje sie poprzez chlodzenie w wodzie najlepiej z temp. 1323°K (1050°C) oraz przez zgniot powierzchniowy. Dzieki temu najwaz¬ niejsza cecha tego staliwa —¦ odpornosc na scie¬ ranie wzrosla 2—3 razy. 108292108292 3 4 PLThe patent description was published: March 16, 1981 108292 Int. CL2 C22C 38/38 Creators of the invention: Waclaw Sakwa, Stanislaw Jura, Tadeusz Chrószcz, Józef Czepiel, Ryszard Kowalczyk. Authorized by the patent: Politechnika Slaska im. Wincentego Pstrowski, Gliwice (Poland) Manganese-chromium-molybdenum cast steel, abrasion-resistant The prudimiot of the invention is manganese-chromium-molybdenum cast steel, resistant to abrasion. 1.4% C, 10-14% Mn, 0.5% Si, or cast steel with a weight content of 1.0-0., 2% C, 6-8% Mn.-There are also varieties of these cast steels containing additionally 0.5-2.0% Mo. A characteristic feature of these plastics is an austenitic structure with a hardness of about 200 HB. The abrasion resistance and increase in hardness are obtained by these plastics after crushing. Thanks to this advantage, these plastics are widely used to work in strong conditions. The surface hardening increases to 400-500 HV. The extent of the hardening is insufficient, however, and it is expedient to obtain higher hardness, and thus wear resistance. The manganese-chromium-molybdenum abrasion-resistant steel according to the invention contains a percentage by weight 0.8-1.41% carbon, 5.0-8.0% manganese, 1.0- ^ 3.5% chromium, 0.5-2.0% molybdenum, 0.3-0.81% Silicon, residual iron. According to the invention, the marigan-chromium-molybdenum steel has an austenitic structure, but after supersaturation it has a high hardness, which increases additionally after crushing. The hardening after supersaturation reaches a depth of up to 50 mm, which sufficiently increases the permanent wear resistance. Compared to the 10 15 2 austenitic cast steels used so far, the abrasive wear resistance increased 2-3 times. An example chemical composition of manganese-chromium-mole / bdenum cast steel according to the invention in% by weight is as follows: Cast steel I. 1.05% C, 6.2% Mn, 2.1% Or, 0.8% Mo, 0.4% Si, 0.03% S, 0.07% P Cast steel II. 1.22% C, 6.8% Mh, 2.7% Or, 1.1% Mo, 0.4% Si, 0.03% S, 0.07% P Some mechanical properties are as follows: Cast steel I Cast steel II 240 HV50 250 HVso hardness after casting hardness after supersaturation at 1050 ° C impact strength after supersaturation at 1050 ° C hardness after working 30% supersaturated cast steel 480 HV5o 20 J / cm2 520 HVso 25 J / ohm2 48 J / cm2 52 J / cm2 560 HV50 580 HVso The quenchability test according to Jomina showed that the material hardens on cooling and achieves a hardness of approx. 50 HRC up to a depth of 50 mm. This is a very big advantage of this material because hardening is achieved by cooling in water preferably to 1323 K (1050 ° C) and by workmanship. As a result, the most important feature of this cast steel, the abrasion resistance, increased 2-3 times. 108 292 108 292 3 4 GB

Claims (1)

1. Zastrzezenie patentowe w procentach wagowych 0,8—1,4% wegla, 5,0— —8,0% mamigaou, 1,0—3,5% chromu, 05—2,0% mo- Staliwo mangainowo-ichroimowo^molibdeinowe od- litadenu, 0,3—0,8% krzemu, reszte zailazo. porne na scieranie, znamienne tym, ze zawiera 5 Drukarnia Narodowa, Zaklad Nr 6, 358/80 Cena 45 zl PL1. Claim in weight percent 0.8-1.4% carbon, 5.0-8.0% mamigaou, 1.0-3.5% chromium, 05-2.0% mangain-ichroim cast steel Molybdeine, lithadene, 0.3-0.8% silicon, the rest of the poison. resistant to abrasion, characterized by the fact that it contains 5 National Printing House, Plant No. 6, 358/80 Price PLN 45 PL
PL19169476A 1976-08-06 1976-08-06 ABRASION RESISTANT MN-CR-MO CAST STEEL MANGANESE-CHROME-MOLIBDEN STEEL PL108292B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19169476A PL108292B1 (en) 1976-08-06 1976-08-06 ABRASION RESISTANT MN-CR-MO CAST STEEL MANGANESE-CHROME-MOLIBDEN STEEL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL19169476A PL108292B1 (en) 1976-08-06 1976-08-06 ABRASION RESISTANT MN-CR-MO CAST STEEL MANGANESE-CHROME-MOLIBDEN STEEL

Publications (2)

Publication Number Publication Date
PL191694A1 PL191694A1 (en) 1978-02-13
PL108292B1 true PL108292B1 (en) 1980-03-31

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PL19169476A PL108292B1 (en) 1976-08-06 1976-08-06 ABRASION RESISTANT MN-CR-MO CAST STEEL MANGANESE-CHROME-MOLIBDEN STEEL

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PL191694A1 (en) 1978-02-13

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