ASTM A128 Standard ye standard specification for high manganese steel castings, ekisaanira okukola ebika eby’enjawulo eby’ebyuma ebiwanvu ebya manganese, omuli lining plate for gravel breaker, jaw plate for jaw crusher, hammer head for hammer crusher, etc. bino ebisuuliddwa ebiseera ebisinga byetaaga okuba okwambala, okukosebwa, n’okwambala okuziyiza okusisinkana okusisinkana okukkakkanya, n’okuzimba ebirala, n’ebirala eby’amakolero.
ASTM A128 Omutindo gulaga ekirungo kya kemiko, eby’obutonde eby’ebyuma, enteekateeka y’ebyuma, obugumu n’okukola kw’okukwata kw’ebyuma bya manganese ebingi. Mu byo, eddagala erikolebwa kye kimu ku bintu ebikulu okukakasa okuziyiza okwambala okulungi n’okuziyiza okukuba kw’ebyuma ebiwanvu ebya manganese. Okusinziira ku mutindo, ebitundu ebikulu eby’eddagala eby’ekyuma kya manganese eky’amaanyi mulimu kaboni (C), manganese (MN), silikoni (SI), phosphorus (p), sulfur (S) ne chromium (CR), era ebirimu manganese bitera okuba wakati wa 11% ne 14%. Okugatta ku ekyo, omutindo gwetaaga enteekateeka y’ebyuma n’obunene bwa kirisitaalo ya casting okugezesebwa okukakasa nti okwambala obulungi okuziyiza n’okuziyiza okukuba.
Mu ngeri y’ebyuma, omutindo gwa ASTM A128 gwetaaga okugezesebwa, obukaluba n’okukubwa ku manganese steel castings enkulu. Okuyita mu bigezo bino, ebipimo by’omutindo gw’amaanyi g’okusika, amaanyi g’amakungula, okuwanvuwa, obukaluba n’okukaluba kw’okukuba bisobola okwekenneenya okukakasa nti bisobola okugumira okukosebwa okunene n’okwambala nga bakozesa.
Ng’oggyeeko obutonde bw’eddagala n’obutonde bw’ebyuma, emitendera gya ASTM A128 era gyalaga ebyetaago by’enkola y’okulongoosa ebbugumu n’omutindo gw’okungulu ogw’ebyuma ebikuba ebyuma ebya waggulu-Manganese. Enkola y’okulongoosa ebbugumu esobola okulongoosa ensengeka y’ekitongole n’enkola y’okusuula, n’okulongoosa obuziyiza bwayo obw’okwambala n’okuziyiza okukuba. Ebyetaagisa ku mutindo gw’okungulu mulimu obukaluba ku ngulu, obulema n’oluwuzi lwa okisayidi okukakasa nti okusuula kuyinza okukuuma embeera ennungi ey’okungulu ng’okozesa.
Okutwaliza awamu, omutindo gwa ASTM A128 gutereeza nnyo era ne gukebera omulimu n’omutindo gw’ebyuma ebikuba ebyuma ebya manganese okukakasa nti bisobola okutuukiriza ebisaanyizo by’okukozesa mu kusima, okuzimba n’ennimiro endala ez’amakolero. Nga ogoberera omutindo guno, high-MANnganese steel castings with good wear resistance and impact resistance esobola okukolebwa, ekiwa omusingo ogwesigika okukulaakulanya n’okukozesa amakolero agakwatagana.
