Gabaɗaya magana, don samun mafi girman kaddarorin inji, ya kamata a zaɓi mafi girman zafin jiki na extrusion. Duk da haka, don 6063 gami, lokacin da yawan zafin jiki na gabaɗaya ya fi 540 ° C, kayan aikin injiniya na bayanin martaba ba za su ƙara ƙaruwa ba, kuma lokacin da ya yi ƙasa da 480 ° C, ƙarfin tensile na iya zama rashin cancanta.
Idan zafin zafin extrusion ya yi yawa, kumfa, fashe-fashe, da tarkace saman har ma da burbushi zai bayyana akan samfurin saboda manne da aluminum. Sabili da haka, don samun samfuran da ke da ingancin saman ƙasa, ana amfani da yanayin zafi kaɗan kaɗan.
Kyakkyawan kayan aiki kuma shine mahimmin mahimmanci don haɓaka haɓakar haɓakar haɓakar aluminium, musamman ma manyan manyan guda uku na extruder na aluminium, tanderun dumama sandar aluminum, da tanderun dumama. Bugu da ƙari, abu mafi mahimmanci shine samun kyakkyawan ma'aikacin extrusion.
Binciken Thermal
Sandunan Aluminum da sanduna suna buƙatar a yi zafi kafin fitar da su don isa ga zafin jiki kusa da zafin solvus, ta yadda magnesium a cikin sandar aluminium zai iya narkewa kuma ya gudana daidai a cikin kayan aluminum. Lokacin da aka sanya sandar aluminum a cikin extruder, zafin jiki ba ya canzawa da yawa.
Lokacin da extruder ya fara, babban ƙarfin turawa na sandar cirewa yana tura kayan aluminum mai laushi daga cikin ramin mutuwa, wanda ke haifar da rikici mai yawa, wanda aka canza zuwa zafin jiki, ta yadda yanayin zafin bayanan extruded ya wuce zafin solvus. A wannan lokacin, magnesium yana narkewa kuma yana gudana a kusa, wanda ba shi da kwanciyar hankali.
Lokacin da zafin jiki ya tashi, dole ne kada ya kasance sama da zafin jiki mai ƙarfi, in ba haka ba aluminum zai narke, kuma ba za a iya kafa bayanin martaba ba. Ɗaukar 6000 jerin gami a matsayin misali, aluminium sanda zafin jiki ya kamata a kiyaye tsakanin 400-540 ° C, zai fi dacewa 470-500 ° C.
Idan yanayin zafi ya yi yawa, zai haifar da tsagewa, idan ya yi ƙasa sosai, saurin fitar da iska zai ragu, kuma yawancin rikice-rikicen da ke haifarwa zai zama zafi, yana haifar da zafi. Hawan zafin jiki yana daidai da saurin extrusion da matsa lamba na extrusion.
Ya kamata a kiyaye zafin jiki na kanti tsakanin 550-575 ° C, aƙalla sama da 500-530 ° C, in ba haka ba magnesium a cikin alluran aluminium ba za a iya narkar da shi ba kuma yana shafar kaddarorin ƙarfe. Amma ba dole ba ne ya fi girma fiye da zafin jiki mai ƙarfi, yawan zafin jiki mai yawa zai haifar da tsagewa kuma yana shafar ingancin bayanin martaba.
Ya kamata a daidaita madaidaicin zafin jiki na extrusion na sandar aluminum a hade tare da saurin extrusion domin bambancin zafin jiki na extrusion bai kasance ƙasa da zafin jiki na solvus ba kuma bai fi girma ba. Alloys daban-daban suna da yanayin zafi daban-daban. Alal misali, zafin jiki na 6063 alloy shine 498 ° C, yayin da na 6005 alloy shine 510 ° C.
Gudun tarakta
Gudun tarakta alama ce mai mahimmanci na ingantaccen samarwa. Koyaya, bayanan martaba daban-daban, siffofi, gami, girma, da sauransu na iya shafar saurin tarakta, wanda ba za'a iya haɗa shi gaba ɗaya ba. Masana'antun bayanan extrusion na zamani na yamma na iya cimma saurin tarakta na mita 80 a cikin minti daya.
Ƙimar sandar extrusion wata muhimmiyar alama ce ta yawan aiki. Ana auna shi a cikin millimeters a minti daya kuma saurin sandar extrusion galibi ya fi dogaro fiye da saurin tarakta yayin nazarin ingancin samarwa.
Mold zafin jiki yana da matukar muhimmanci ga ingancin extruded profiles. Ya kamata a kiyaye zafin jiki a kimanin 426 ° C kafin extrusion, in ba haka ba zai iya toshewa ko ma lalata ƙirar. Manufar quenching shine don "daskare" nau'in magnesium mai hadewa, daidaita ma'aunin atom na magnesium mara kyau da kuma hana su daga daidaitawa, don kiyaye ƙarfin bayanin martaba.
Hanyoyi uku masu mahimmanci na kashewa sun haɗa da: sanyaya iska, sanyaya hazo na ruwa, sanyaya tankin ruwa. Nau'in quenching da aka yi amfani da shi ya dogara da saurin extrusion, kauri da abubuwan da ake buƙata na bayanan martaba, musamman ma ƙarfin buƙatun. Nau'in gami shine cikakken nuni na taurin da kaddarorin roba na gami. Ƙungiyoyin Aluminum na Aluminum sun ƙayyade dalla-dalla dalla-dalla ta Ƙungiyar Aluminum ta Amurka, kuma akwai jihohi biyar na asali:
F yana nufin "kamar yadda aka ƙirƙira".
O yana nufin "kayan aikin da aka rufe".
T yana nufin cewa an "mayar da zafi".
W yana nufin kayan an yi maganin zafi mai zafi.
H yana nufin alluran da ba za a iya magance zafi ba waɗanda “an yi aikin sanyi” ko “nauyi mai tauri”.
Zazzabi da lokaci fihirisa biyu ne waɗanda ke buƙatar tsananin kulawa da tsufa na wucin gadi. A cikin tanderun tsufa na wucin gadi, kowane ɓangaren zafin jiki dole ne ya kasance iri ɗaya. Ko da yake ƙananan zafin jiki na iya inganta ƙarfin bayanan martaba, lokacin da ake buƙata zai ƙaru daidai da haka. Don cimma mafi kyawun kaddarorin jiki na ƙarfe, ya zama dole don zaɓar madaidaicin aluminum gami da mafi kyawun nau'in sa, yi amfani da yanayin quenching mai dacewa, sarrafa yanayin tsufa da ya dace da lokacin tsufa don haɓaka yawan amfanin ƙasa, yawan amfanin ƙasa shine wani muhimmin index na samarwa. inganci. Ba shi yiwuwa a iya cimma 100% yawan amfanin ƙasa, saboda butts za su yanke kayan saboda alamar tsinke na tarakta da masu shimfiɗa.
May Jiang ta gyara daga MAT Aluminum
Lokacin aikawa: Juni-05-2023
