Za a sami lahani a kowane simintin.Kasancewar waɗannan lahani zai kawo babban haɗari na ɓoye ga ingancin ciki na simintin gyaran kafa.Gyaran walda don kawar da waɗannan lahani a cikin tsarin samarwa kuma zai kawo babban nauyi ga tsarin samarwa..Musamman, kamar yadda bawul ɗin simintin simintin simintin ƙwanƙwasa ne wanda ke fuskantar matsin lamba da zafin jiki, ƙarancin tsarinsa na ciki yana da mahimmanci.Saboda haka, lahani na ciki na simintin gyare-gyare ya zama ƙwaƙƙwaran abin da ke shafar ingancin simintin.
Lalacewar ciki na simintin gyare-gyaren bawul sun haɗa da pores, haɗaɗɗun slag, raguwar porosity da fasa.
Anan zai gabatar da ɗayan manyan lahani --slag inclusions da fasa
(1) Haɗin yashi (slag):
Haɗin yashi (slag), wanda aka fi sani da trachoma, rami ne mara daidaituwa ko mara daidaituwa a cikin simintin gyaran kafa.Ramin yana haɗe da yashi mai gyare-gyare ko ƙoshin ƙarfe, kuma girman ba daidai ba ne.An tattara a wuri ɗaya ko fiye, sau da yawa a cikin ɓangaren sama.
Dalilan hada yashi (slag):
Ana samun haɗaɗɗun Slag saboda tsararren ƙarfe mai hankali yana shiga simintin gyare-gyare tare da narkakkar karfe yayin aikin narkakkar ko zubar da ƙarfe.Haɗin yashi yana faruwa ne sakamakon ƙarancin ƙarancin rami yayin gyare-gyare.Lokacin da aka zuba narkakken ƙarfe a cikin rami, yashin da aka narkar da shi yana wanke yashi da narkakkar kuma ya shiga ciki na simintin.Bugu da ƙari, rashin aiki mara kyau lokacin gyarawa da rufe akwatin, da kuma abin da ya faru na asarar yashi kuma shine dalilin hada yashi.
Hanyoyi don hana haɗa yashi (slag):
①Lokacin da aka narkar da narkakkar karfe, shaye-shaye da slag ya kamata a gaji sosai kamar yadda zai yiwu.Bayan an fitar da narkakken karfen, ya kamata a kwantar da shi a cikin ledar, wanda zai dace da shawagi na shingen karfe.
② Ba a juye buhun narkakkar karfen da ake zubawa gwargwadon iko ba, sai dai buhun tankin shayi ko jakar zubowa kasa, ta yadda za a hana tudun da ke saman narkakken karfen shiga cikin rami da aka narkakkar din. .
③ Yakamata a dauki matakan simintin gyare-gyare lokacin da aka zuba narkakken karfen don rage girman karfen da ke shiga cikin rami tare da narkakkar karfe.
④ Don rage yuwuwar haɗawar yashi, tabbatar da ƙayyadaddun ƙwayar yashi lokacin yin gyare-gyaren, yi hankali kada ku sauke yashi lokacin gyaran ƙirar, kuma busa ramin ƙira mai tsabta kafin rufe akwatin.
(2)Karar:
Mafi yawan tsagawar simintin gyare-gyaren tsagewar zafi ne tare da sifar da ba ta dace ba, masu shiga ko rashin shiga, ci gaba ko tsaka-tsaki, kuma karfen da ke tsaga yana da duhu ko kuma yana da iskar oxygenation.
Akwai dalilai guda biyu na fasa: matsanancin zafin jiki da nakasar fim na ruwa.
Matsanancin zafin jiki shine damuwa da aka samu ta hanyar raguwa da nakasar narkakken ƙarfe a babban zafin jiki.Lokacin da damuwa ya wuce ƙarfin ko ƙayyadaddun nakasar filastik na ƙarfe a wannan zafin jiki, fasa zai faru.Nakasar fim ɗin ruwa shine samuwar fim ɗin ruwa tsakanin hatsi na narkakken ƙarfe yayin ƙarfafawa da crystallization.Tare da ci gaba na ƙarfafawa da crystallization, fim din ruwa ya lalace.Lokacin da adadin nakasawa da saurin nakasawa ya wuce ƙayyadaddun iyaka, fasa yana faruwa.Matsakaicin zafin jiki na haɓakar fashewar zafi yana kusan 1200-1450 ° C.
Abubuwan da ke haifar da tsagewa:
①S da abubuwan P a cikin ƙarfe abubuwa ne masu cutarwa waɗanda ke haifar da tsagewa.Su eutectic tare da baƙin ƙarfe yana rage ƙarfi da filastik na simintin ƙarfe a babban zafin jiki, yana haifar da fasa.
② Haɗin daɗaɗɗen slag da rarrabuwa a cikin ƙarfe yana haɓaka haɓakar damuwa, don haka ƙara haɓakar zafi mai zafi.
③ Mafi girman madaidaicin juzu'i na ƙimar ƙarfe, mafi girman yanayin fashewar thermal.
④ Mafi girman ƙarfin wutar lantarki na ƙarfe na ƙarfe, mafi girma da tashin hankali na farfajiya, mafi kyawun kayan aikin inji mai zafi, da ƙananan yanayin fashewar thermal.
⑤ Tsarin tsari na simintin gyare-gyare ba shi da kyau a cikin ƙirƙira.Alal misali, fillet ɗin ya yi ƙanƙara, bambancin kauri na bango yana da girma, kuma damuwa mai tsanani yana da tsanani, wanda zai haifar da fashewa.
⑥ Ƙaƙƙarfan ƙwayar yashi ya yi yawa sosai, kuma rashin daidaituwa na ainihin yana hana raguwa na simintin gyaran kafa kuma yana ƙaruwa da haɓaka.
⑦ Wasu kamar rashin tsari na zub da hawan, saurin sanyaya saurin simintin gyare-gyare, damuwa mai yawa da ke haifar da yanke zub da jini da maganin zafi zai kuma shafi haɓakar fasa.
Dangane da abubuwan da ke haifar da abubuwan da ke haifar da tsagewar da ke sama, ana iya ɗaukar matakan da suka dace don ragewa da kuma guje wa faruwar lahani.
Dangane da binciken da aka yi a sama na abubuwan da ke haifar da lahani na simintin, nemo matsalolin da ke akwai, kuma a ɗauki matakan inganta daidaitattun, za a iya samun hanyar da za a magance lahanin simintin, wanda ke da fa'ida ga haɓaka ingancin simintin.
Lokacin aikawa: Agusta-11-2022