Fasassun juzu'i zai shafi ƙimar samfurin da aka gama bayan mirgina.Ƙara lokacin tsaftace billet, duka babban lahani.Yanayin zafin jiki yana raguwa na 700-900 ℃.Dalilin da ya sa ƙananan saman fashe shine 1050-1100 ℃, ɓarna mai jujjuyawa a saman dalilin shine saman billet ta babban sashi yana daidaita damuwa.Niobium nitride a cikin iyakokin hatsi na austenite yana rage karfin dauri, hazo iyakar hatsi.A wannan gaba a cikin sashin lankwasa slab junction arc mara kyau, yana haifar da fashewar ƙasa ƙasa.Tsage-tsalle na tsaye da abun da ke tattare da sinadarai, zazzabi mai sanyaya mold, kayan aikin ƙira, abun da ke tattare da sinadarai na slag, ci gaba da injin madaidaicin tsarin sanyaya na biyu mai alaƙa.Matakan rigakafi masu alaƙa:
1. Sarrafa abun da ke ciki na karfe.Ƙoƙarin hana wC shine 0.12% -0.16% D36 abun ciki na carbon karfe a cikin hanyar sarrafa smelting bisa ga babba iyaka.Zai iya rage tsagewa yadda ya kamata.Yanki mai ɗaukar hankali.
2. Control crystallization zafin jiki m mold zafin jiki, mold zafin jiki canje-canje tasiri hanyar inganta shi ne ƙara mold sanyaya ruwa preheating na'urar.Danne faruwar tsagewar lokacin da yanayi ya canza.Hakanan za'a iya amfani dashi bayan kowane tasha zub da lokaci ba a buɗe lokacin da ruwan zafin jiki ya ƙasa da 20 ℃ mold mold sanyaya ruwa, don tabbatar da cewa zazzabi na simintin gyaran kafa fashion.
3. Daidaita sigogin tsari na crystallization don daidaita yawan ruwa girman girman ƙirar, bisa ga kauri daban-daban na jan karfe.Ta hanyar daidaita adadin ruwa don tabbatar da cewa matakai daban-daban na wannan ƙarfin sanyi iri ɗaya.
4. Don inganta tsarin sanyaya na biyu, inganta yanayin yanayin daidaitawa, ta hanyar inganta tsarin sanyaya na biyu.Hana gallazawar yankin billet, zai fi rage yuwuwar fashe fashe.
5. Tsaftace bayyanar madaidaicin madaidaici da kawar da kusurwar ƙwanƙwasa, hanya ce mai inganci don tsaftace ƙaƙƙarfan tabbacin inganci.Za mu iya inganta ingancin karshe na slab.