. "Nov\u00E9 druhy austenitick\u00FDch manganov\u00FDch ocel\u00ED ve Sl\u00E9v\u00E1rn\u011B Chomutov" . . . "Austenitic manganese steels; Chromium carbides; Surface hardening"@en . "4"^^ . "[9D28811F3F13]" . "P(FR-TI3/637)" . . "2"^^ . "Provazn\u00EDk, Jaroslav" . . "S\u00FDkora, P." . "\u017Di\u017Eka, V." . . . "RIV/68407700:21220/12:00204554!RIV13-MPO-21220___" . "Nov\u00E9 druhy austenitick\u00FDch manganov\u00FDch ocel\u00ED ve Sl\u00E9v\u00E1rn\u011B Chomutov"@cs . . . "Hadfieldova ocel je jedn\u00EDm z nejd\u016Fle\u017Eit\u011Bj\u0161\u00EDch materi\u00E1l\u016F pro aplikace v prost\u0159ed\u00ED s vysok\u00FDmi r\u00E1zy a abraz\u00ED. Vykazuje v\u00FDrazn\u00E9 povrchov\u00E9 zpevn\u011Bn\u00ED p\u0159i r\u00E1zov\u00E9m nam\u00E1h\u00E1n\u00ED. T\u00EDm p\u0159i provozu zlep\u0161uje svou abrazivn\u00ED odolnost a sou\u010Dasn\u011B se projevuje vysokou hou\u017Eevnatost\u00ED. Mezi z\u00E1kladn\u00ED prvky, kter\u00E9 tento materi\u00E1l \u0159ad\u00ED mezi slitiny s austenitickou strukturou, pat\u0159\u00ED Mn (p\u0159ev\u00E1\u017En\u011B 11-14)% s obsahem uhl\u00EDku v rozmez\u00ED 1,0-1,4 %. \u0158e\u0161en\u00EDm v\u00FDzkumn\u00E9 zpr\u00E1vy byl standardn\u00ED sortiment sl\u00E9v\u00E1rny roz\u0161\u00ED\u0159en o dal\u0161\u00ED typy austenitick\u00FDch manganov\u00FDch oceli. Pro tyto materi\u00E1ly je p\u0159i pomal\u00E9m chladnut\u00ED charakteristick\u00E1 tvorba karbid\u016F uhl\u00EDku Fe3C, respektive karbid\u016F chromu, kter\u00E9 se vylu\u010Duj\u00ED po hranic\u00EDch austenitick\u00FDch zrn. P\u0159i procesu oh\u0159evu, do austenitiza\u010Dn\u00EDch teplot, dojde k zp\u011Btn\u00E9mu rozpu\u0161t\u011Bn\u00ED karbid\u016F vznikl\u00FDch p\u0159i tuhnut\u00ED a p\u0159ev\u00E1\u017En\u011B soust\u0159ed\u011Bn\u00FDch po hranic\u00EDch zrn. P\u0159i spr\u00E1vn\u00E9m postupu austenitizace se z\u00EDsk\u00E1 austenitick\u00E1 struktura bez karbid\u016F po hranic\u00EDch zrn. N\u00E1sledn\u00FDm bezprost\u0159edn\u00EDm krokem mus\u00ED b\u00FDt prudk\u00E9 zakalen\u00ED, t\u00EDm zabr\u00E1n\u011Bn\u00ED zp\u011Btn\u00E9 precipitace karbid\u016F a zachycen\u00ED uhl\u00EDku ve form\u011B tuh\u00E9ho roztoku v austenitu. Ve skute\u010Dn\u00FDch provozn\u00EDch podm\u00EDnk\u00E1ch, kdy\u017E u austenitick\u00FDch manganov\u00FDch ocel\u00ED doch\u00E1z\u00ED k opakovan\u00FDm r\u00E1z\u016Fm, se projevuje zpevn\u011Bn\u00ED povrchu do hloubek 0,5 a\u017E 2,5 mm. \u010C\u00EDm razantn\u011Bj\u0161\u00ED je zat\u00ED\u017Een\u00ED v provozu, t\u00EDm hlub\u0161\u00ED je povrchov\u00E9 zpevn\u011Bn\u00ED."@cs . "New Grades of Austenitic Manganese Steels at the Chomutov Foundry J.S.C"@en . "Nov\u00E9 druhy austenitick\u00FDch manganov\u00FDch ocel\u00ED ve Sl\u00E9v\u00E1rn\u011B Chomutov"@cs . "New Grades of Austenitic Manganese Steels at the Chomutov Foundry J.S.C"@en . . "21220" . . "Hadfield steel is one of the most important steels for applications in strong impact and abrasive environments. At impact loading it is subject to extensive surface hardening. Thus in operation it improves it resistance to abrasion and at the same time maintains high ductility. Among basic elements which ranks this material among alloys with an austenitic structure, are Mn (mostly 11-14%) and carbon in the range 1.0-1.4%. By investigations carried out within the scope of the project the standard assortment of the foundry was extended with further grades of austenitic manganese steels. The characteristic of these materials during slow cooling is formation of iron carbides Fe3C and/or chromium carbides, precitated along the boundaries of the austinite grains. During heating, up to austenitization temperatures, carbides created during solidification and mostly concentrated along grain boundaries are dissolved. By a correct austenitization procedure an austenitic structure can be obtained without any carbides along grain boundaries. The immediate subsequent step must be rapid quenching which prevents retroprecipitation of carbides and capturs carbon in the form of a solid solution in the austenite. In real operating conditins, when austenitic manganese steels are subject to repeated impacts, surface hardening appears to depth of 0.5 up to 2.5mm. The stronger are the impacts the deeper is the surface hardening."@en . . "RIV/68407700:21220/12:00204554" . . . "Hadfieldova ocel je jedn\u00EDm z nejd\u016Fle\u017Eit\u011Bj\u0161\u00EDch materi\u00E1l\u016F pro aplikace v prost\u0159ed\u00ED s vysok\u00FDmi r\u00E1zy a abraz\u00ED. Vykazuje v\u00FDrazn\u00E9 povrchov\u00E9 zpevn\u011Bn\u00ED p\u0159i r\u00E1zov\u00E9m nam\u00E1h\u00E1n\u00ED. T\u00EDm p\u0159i provozu zlep\u0161uje svou abrazivn\u00ED odolnost a sou\u010Dasn\u011B se projevuje vysokou hou\u017Eevnatost\u00ED. Mezi z\u00E1kladn\u00ED prvky, kter\u00E9 tento materi\u00E1l \u0159ad\u00ED mezi slitiny s austenitickou strukturou, pat\u0159\u00ED Mn (p\u0159ev\u00E1\u017En\u011B 11-14)% s obsahem uhl\u00EDku v rozmez\u00ED 1,0-1,4 %. \u0158e\u0161en\u00EDm v\u00FDzkumn\u00E9 zpr\u00E1vy byl standardn\u00ED sortiment sl\u00E9v\u00E1rny roz\u0161\u00ED\u0159en o dal\u0161\u00ED typy austenitick\u00FDch manganov\u00FDch oceli. Pro tyto materi\u00E1ly je p\u0159i pomal\u00E9m chladnut\u00ED charakteristick\u00E1 tvorba karbid\u016F uhl\u00EDku Fe3C, respektive karbid\u016F chromu, kter\u00E9 se vylu\u010Duj\u00ED po hranic\u00EDch austenitick\u00FDch zrn. P\u0159i procesu oh\u0159evu, do austenitiza\u010Dn\u00EDch teplot, dojde k zp\u011Btn\u00E9mu rozpu\u0161t\u011Bn\u00ED karbid\u016F vznikl\u00FDch p\u0159i tuhnut\u00ED a p\u0159ev\u00E1\u017En\u011B soust\u0159ed\u011Bn\u00FDch po hranic\u00EDch zrn. P\u0159i spr\u00E1vn\u00E9m postupu austenitizace se z\u00EDsk\u00E1 austenitick\u00E1 struktura bez karbid\u016F po hranic\u00EDch zrn. N\u00E1sledn\u00FDm bezprost\u0159edn\u00EDm krokem mus\u00ED b\u00FDt prudk\u00E9 zakalen\u00ED, t\u00EDm zabr\u00E1n\u011Bn\u00ED zp\u011Btn\u00E9 precipitace karbid\u016F a zachycen\u00ED uhl\u00EDku ve form\u011B tuh\u00E9ho roztoku v austenitu. Ve skute\u010Dn\u00FDch provozn\u00EDch podm\u00EDnk\u00E1ch, kdy\u017E u austenitick\u00FDch manganov\u00FDch ocel\u00ED doch\u00E1z\u00ED k opakovan\u00FDm r\u00E1z\u016Fm, se projevuje zpevn\u011Bn\u00ED povrchu do hloubek 0,5 a\u017E 2,5 mm. \u010C\u00EDm razantn\u011Bj\u0161\u00ED je zat\u00ED\u017Een\u00ED v provozu, t\u00EDm hlub\u0161\u00ED je povrchov\u00E9 zpevn\u011Bn\u00ED." . "Nov\u00E9 druhy austenitick\u00FDch manganov\u00FDch ocel\u00ED ve Sl\u00E9v\u00E1rn\u011B Chomutov" . . . "154638" . "Mores, Anton\u00EDn" . .