Dab tsi yog qhov zoo ntawm silicon barium calcium inoculant

Piv nrog rau ferrosilicon, nws muaj peev xwm ua kom muaj zog graphitize, nce cov eutectic pawg, txhim kho qhov sib xws ntawm cov qauv thiab hardness ntawm thaj chaw ntawm cov thicknesses sib txawv, thiab maj mam disintegrates. Nrog tib tus nqi ntawm cov khoom ntxiv, lub zog tensile ntawm ferrosilicon nce los ntawm 20-30 N / mm2 piv rau ferrosilica.

Piv nrog rau ferrosilica, lub hardness ntawm casting txawv nyob rau hauv ib tug me me ntau yam thaum tus nqi ntawm additive hloov. Nrog tib tus nqi ntawm cov additives, qhov sib txawv ntawm hardness nyob rau hauv txawv seem ntawm cov kauj ruam xeem chav tsev yog me me, uas ua rau lub deposition ntawm uniform thiab nyias graphite ntawm hom A. Ntxiv barium ferrosilicon rau molten hlau tom qab spheroidization tuaj yeem nce tus naj npawb ntawm graphite. pob, txhim kho roundness, tshem tawm cementite, thiab disperse los yog txo phosphorus eutectic. Nws muaj cov nyhuv spheroidization tsis muaj zog thiab tsis muaj zog pearlite stabilization nyhuv. Cov ntsiab lus barium siab dhau tsis ua rau muaj kev nce ntxiv hauv cov nyhuv, nws yog qhov zoo dua los siv 4-6%. Aluminium kuj tseem ua lub luag haujlwm hauv deoxidation thiab txhawb graphitization.

Ntau dhau ntawm txhuas tuaj yeem yooj yim ua rau tsim cov pores. 1-2% zoo dua. Lub 8-10% manganese nyob rau hauv barium ferrosilicon tuaj yeem txo qhov melting point, nce lub ntiajteb txawj nqus, txhim kho solubility, thiab tsis muaj kev cuam tshuam rau lub zog thiab dawb casting nyiam ntawm graft casting. Txhawm rau txo cov nqi, nws tuaj yeem ua rau tsis muaj manganese. Cov ntsiab lus ntawm silicon ntawm manganese-dawb castings yuav tsum nyob ze rau ntawm qhov txwv. Pseudospecific gravity ntawm barium ferrosilicon yog 3.0-3.3. Lub melting point range yog 1170-1250 degree . Lub solubility yog me ntsis zoo dua li ntawm ferrosilicon. Nws oxidizes yooj yim hauv cov huab cua ntub.

Thaum silicon barium calcium yog siv los ua deoxidizer, nws ntxiv rau cov hlau molten kom ntxiv cov calcium hauv cov hlau molten. Piv nrog rau lwm cov deoxidizers, cov ntsiab lus calcium nce ntxiv. Raws li tuaj yeem pom, barium zoo tiv thaiv calcium hauv molten steel thiab txo cov calcium oxidation, yog li ua tiav lub hom phiaj ntawm calcium ua hauv molten steel.