Ekyuma kya Manganese (High Manganese Steel)
The commonly used high manganese steel in China brand and its scope of application are: ZGMn13-1 (C 1.10%~1.50%) for low impact parts, ZGMn13-2 (C1.00%~1.40%) for ordinary parts, ZGMn13-3 (C0.90%~1.30%) for complex parts, ZGMn13-4 (C0.90%~1.20%) ku bitundu ebikosa ennyo. Ebirimu manganese mu bika by’ebyuma ebina waggulu biri 11.0%~14.0%.
Mu kiseera ky’okukyukakyuka okw’ennyogovu okw’omugugu gw’okukuba, ekyuma kinywezebwa olw’okweyongera okunene okwa density y’okuseeseetula, okutuusa okuseeseetula, okusengejja kwa pulagi okuseeseetula, n’enkolagana ya atomu z’okuseeseetula ne atomu ezisengejja. Eno nsonga nkulu nnyo ekola ku kukakanyaza. Ensonga endala enkulu eri nti amaanyi g’ensobi za layeri ga manganese autenite aga waggulu ga wansi, era gatera okutuuma ensobi mu kukyukakyuka mu kiseera ky’okukyukakyuka, bwe kityo ne kitondekawo embeera z’okutondebwa kwa ε martensite n’okukola okukyukakyuka (deformation twin). High density dislocation, dislocation deposition and entanglement kiyinza okutera okulabibwa mu deformation hardening layer of conventional high manganese steel.ε okulabika kwa martensite ne deformed twin kifuula ekyuma ekizibu okuvunda, naddala kubanga ekyo eky’oluvannyuma kikulu nnyo. Ensonga ezo waggulu zifuula ekyuma ekikaluba eky’ekyuma kya manganese ekiwanvu okunywezebwa okutuuka ku ddaala erya waggulu, era obukaluba bulongooseddwa nnyo.
Ekyuma kya manganese eky’ekika ekya waggulu kyangu okukaluba, n’olwekyo kizibu okukola, ebitundu ebisinga obungi eby’okusuula, omuwendo omutono ennyo ogw’okulongoosa enkola y’okujingirira. Omutindo gw'okusuula (casting performance) ogw'ekyuma kya waggulu-Manganese kisinga. Ekifo ky’ekyuma ekisaanuuka kitono (nga 14 ()()℃), ekiseera eky’ebbugumu eky’amazzi n’olunyiriri olugumu eky’ekyuma kitono (nga 50℃), obutambuzi bw’ebbugumu obw’ekyuma buba wansi, kale liquidity esaanuuse nnungi, nnyangu okuyiwa okubumba. Omugerageranyo gw’okugaziwa kwa waya ogw’ekyuma kya manganese eky’ekika ekya waggulu gukubisaamu emirundi 1.5 ogw’ekyuma ekirongoofu ate emirundi 2 egy’ekyuma kya kaboni. N’olwekyo, okukendeera kw’obunene n’okukendeera kwa waya biba binene mu kiseera ky’okusuula, ekitera okunyigirizibwa n’okukutuka.
Okusobola okulongoosa enkola y’ekyuma kya manganese eky’amaanyi, okunoonyereza kungi kukoleddwa ku kukola aloyaling, microalloying, carbon ne manganese content adjustment ne precipitation reinforcement treatment, era zikozesebwa mu nkola y’okufulumya. Endabika y’ekyuma kya manganese ekya mesostatic austenitic esobola okukendeeza ennyo ku kaboni ne manganese mu kyuma n’okulongoosa okukyukakyuka n’okunyweza sipiidi y’ekyuma, ekiyinza okukozesebwa ku mbeera y’okukola ey’omugugu ogw’amaanyi ogw’amaanyi n’ogwa wansi, nga guno gwe nkulaakulana empya ey’ekyuma kya manganese eky’amaanyi.
(2) Tewali kyuma kya magineeti. Ekyuma eky’ekika kino kirimu ebitundu ebisukka mu 17% ebya manganese, era okutwalira awamu kaboni ali wansi wa 1.0%, era kitera okukozesebwa mu mulimu gw’emmotoka okukola empeta ezikuuma. Densite y’ekyuma eky’ekika kino eri nga 7.87~7.98g/cm3. Olw’obungi bwa kaboni ne manganese, obutambuzi bw’ebbugumu obw’ekyuma buba bubi. Obutambuzi bw’ebbugumu buba 12.979W/ (m℃), nga 1 / 3 ku kyuma kya kaboni. Olw’okuba ekyuma kibeera kya austenitic tissue era nga tekirina magineeti, magnetic conductivity yaayo μ eba 1.003 ku 1.03 (h/m).
