A lokacin aikin ƙarfafawar simintin gyare-gyare, gabaɗaya akwai wurare uku akan sashin giciye, wato yanki mai ƙarfi, yanki mai ƙarfi, da wurin ruwa.
Yankin ƙarfafawa shine yankin da "tsatsaki da ruwa ke kasancewa tare" tsakanin yankin ruwa da yanki mai ƙarfi. Faɗinsa ana kiransa faɗin yanki mai ƙarfi. Nisa na yanki mai ƙarfi yana da babban tasiri akan ingancin simintin. Hanyar daɗaɗɗen simintin gyare-gyare ta dogara ne akan faɗin yanki mai ƙarfi da aka gabatar akan ɓangaren giciye na simintin gyare-gyaren, kuma an raba shi zuwa ƙaƙƙarfan Layer-by-Layer, ƙwanƙwasa ƙarfi, da ƙarfi na tsaka-tsaki.
Bari mu dubi halaye na hanyoyin ƙarfafawa kamar su Layer-by-Layer solidification da manna solidification.
Ƙarfafawar Layer-by-Layer: Lokacin da faɗin yanki mai ƙarfi ya kasance kunkuntar sosai, yana cikin hanyar ƙarfafa Layer-by-Layer. Its solidification gaban ne a kai tsaye lamba tare da ruwa karfe. Karfe na kunkuntar solidification zone sun hada da tsaftataccen karafa (taguwar masana'antu, zinc masana'antu, tin masana'antu), eutectic gami (aluminum-silicon alloys, kusa-eutectic gami kamar launin toka simintin ƙarfe), da gami tare da kunkuntar kewayon crystallization (kamar low carbon karfe). , aluminum tagulla, tagulla tare da kananan crystallization kewayon). Abubuwan ƙarfe na sama duk suna cikin hanyar ƙarfafa Layer-by-Layer.
Lokacin da ruwan ya taru ya zama ƙwaƙƙwaran yanayi kuma ya ragu cikin girma, za a iya ci gaba da cika shi da ruwa, kuma yanayin samar da tarwatsawar ƙanƙanta kaɗan ne, amma an bar ramukan ƙanƙantar da hankali a cikin ingantaccen ɓangaren simintin. Kawancen Shrovage mai da hankali suna da sauƙin kawar, don haka kaddarorin shrinkage suna da kyau. Tsage-tsalle na tsaka-tsakin da ke haifar da raguwar hanawa ana samun sauƙin cika su da narkakkar ƙarfe don warkar da tsagewar, don haka simintin gyare-gyare ba su da ɗanɗano mai zafi. Hakanan yana da mafi kyawun ikon cikawa lokacin da ƙarfi ya faru yayin aikin cikawa.
Menene coagulation na manna: Lokacin da yankin coagulation yana da faɗi sosai, yana cikin hanyar manna coagulation. Karfe na faffadan solidification zone sun hada da aluminum gami, magnesium gami (aluminum-tagulla gami, aluminum-magnesium gami, magnesium gami), jan karfe gami (tin tagulla, aluminum tagulla, tagulla tare da fadi da crystallization zazzabi kewayon), baƙin ƙarfe-carbon alloys. (high carbon karfe, ductile baƙin ƙarfe).
Faɗin yanki mai ƙarfi na ƙarfe, yana da wahala don kumfa da haɗawa a cikin narkakkar ƙarfe don yin iyo da cirewa yayin yin simintin, kuma yana da wahalar ciyarwa. Simintin gyare-gyare na da saurin fashewa. Lokacin da tsagewa ya faru tsakanin lu'ulu'u, ba za a iya cika su da ƙarfe mai ruwa don warkar da su ba. Lokacin da irin wannan nau'in gawa ya ƙarfafa yayin aikin cikawa, ikon cika shi ma ba shi da kyau.
Abin da ke tsaka-tsaki mai ƙarfi: Ƙaƙƙarwar da ke tsakanin ƙunƙarar ƙarfi mai ƙarfi da yanki mai faɗi mai ƙarfi ana kiransa tsaka-tsaki mai ƙarfi. Alloys na tsakiyar solidification zone sun hada da carbon karfe, babban manganese karfe, wasu musamman tagulla da farin simintin ƙarfe. Halayen ciyarwarsa, yanayin fasa zafin zafi da ikon cika mold suna tsakanin ƙarfafa Layer-by-Layer solidification da manna hanyoyin ƙarfafawa. The iko da solidification na irin wannan simintin gyaran kafa ne yafi daidaita tsarin sigogi, kafa m zafin jiki gradient a kan giciye sashe na simintin gyaran kafa, rage solidification yankin a kan simintin giciye sashe, da kuma canza solidification yanayin daga pasty solidification zuwa Layer. -ta-Layer ƙarfafa don samun ƙwararrun simintin gyaran kafa.
Lokacin aikawa: Mayu-17-2024
