Lalacewar Material na Ƙarfe-Ƙaƙƙarfan Ƙarfe da Ƙunƙasa Porosity

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 ɗaya daga cikin manyan lahani ---- Pores da raguwar porosity

(1)Pores:

Gas ne ke haifar da pores, saman ramin yana da santsi, kuma ana yin shi a ciki ko kusa da saman simintin, kuma siffar galibin madauwari ne ko murabba'i.

Babban tushen iskar gas da ke haifar da pores sune:

①The nitrogen da hydrogen narkar da a cikin karfe suna kunshe ne a cikin karfe a lokacin da solidification na simintin gyaran kafa, forming rufaffiyar madauwari ko m bango na ciki tare da karfe haske pores.

② Danshi ko abubuwa masu canzawa a cikin kayan ƙirar za su zama gas saboda dumama, samar da pores tare da bangon ciki mai launin ruwan kasa.

③ A lokacin aikin zubar da karfe, saboda rashin kwanciyar hankali, iska yana shiga don samar da pores.

Yadda za a hana lahani na Pores:

①A cikin narkewa, yi amfani da ɗanyen kayan ƙarfe kaɗan ko babu tsatsa kamar yadda zai yiwu, da gasa da bushe kayan aikin da ladle.

②A fitar da narkakkar karfe da zafi mai zafi sannan a zuba shi da zafi kadan, sannan a kwantar da narkakken karfen yadda ya kamata domin saukaka shawagi da iskar gas.

③ Zane-zanen tsari na mai jujjuyawar ya kamata ya kara matsa lamba kan narkakken karfe don gujewa shigar da iskar gas, da kuma kafa hanyar iskar gas ta wucin gadi don shayar da hankali.

④ Kayan gyaran gyare-gyare ya kamata ya kula da abun ciki na ruwa da samar da iskar gas, ƙara yawan iska, kuma ya kamata a yi gasa da yashi da yashi da kuma bushe kamar yadda zai yiwu.

(2)Kogon raguwa (sakowa):

Yana da madaidaicin madauwari ko katsewa ko rami mara daidaituwa (kogon) a cikin simintin gyare-gyare (musamman a wurin haɗin gwiwa mai zafi), tare da ƙaƙƙarfan saman ciki da launi mai duhu.Hatsin suna da yawa, galibi dendrites, kuma suna taruwa a wuri ɗaya ko fiye, kuma zubar da ruwa yana da sauƙin faruwa yayin gwajin ruwa.

Dalili na raguwar rami (sako da):

ƙarar yana raguwa lokacin da ƙarfe ya ƙarfafa daga yanayin ruwa zuwa wani m yanayi.Ƙunƙarar rami na simintin ƙarfe yana haifar da asali ta rashin kulawa mara kyau na tsari mai ƙarfi na jeri, wanda ƙila ya faru ta hanyar saitin hawan da ba daidai ba, babban zafin narkakken ƙarfe na zubowa, da ƙaƙƙarfan ƙarafa.

Hanyoyi don hana raguwar cavities ( sako-sako):

① A kimiyyance zana tsarin simintin gyare-gyare ta yadda karfen narkakkar zai iya dagewa bi da bi, kuma kashi na farko da aka samu ya kamata a kara shi da narkakken karfe.

② Daidai kuma a hankali saita masu tashi, tallafi, da ƙarfe na ciki da na waje don tabbatar da ƙarfafa jeri.

③Lokacin da ake zuba narkakkar karfe, a karshe zuba daga saman mashin yana da amfani wajen tabbatar da zafin jiki da ciyar da narkakkar karfen, da kuma rage yawan ramukan raguwa.

④ Dangane da saurin zubewa, ƙarar saurin zubewa ya fi dacewa ga ƙarfafa jeri fiye da zubar da sauri.

⑤Kada yawan zafin jiki ya yi yawa.Ana fitar da narkakkarfan a yanayin zafi mai zafi kuma ana zubawa bayan an kwantar da shi, wanda zai taimaka wajen rage raguwar kogo.