Canje-canje na tsari na sandunan gami na titanium a lokacin zafi mai zafi

Kayan aikin injiniya na titanium, wanda aka fi sani da kayan aikin injiniya, suna da alaƙa da tsabta. Tsabtataccen titanium yana da kyakkyawan machinability, mai kyau elongation da shrinkage, amma ƙananan ƙarfi kuma bai dace da kayan tsarin ba. Titanium mai tsabta na masana'antu ya ƙunshi ƙazanta masu dacewa, yana da ƙarfin ƙarfi da filastik, kuma ya dace da yin kayan gini. Thermal watsin titanium da titanium gami blanks ne low, wanda zai haifar da babban zafin jiki bambanci tsakanin surface Layer da ciki Layer a lokacin zafi extrusion. Lokacin da zafin jiki na extrusion ganga ne 400 digiri, da zazzabi bambanci iya isa 200 ~ 250 digiri. A ƙarƙashin tasirin haɗin gwiwa na ƙarfafa tsotsa da babban bambancin zafin jiki na ɓangaren blank, ƙarfe a saman da tsakiyar blank yana samar da ƙarfi daban-daban da kaddarorin filastik, wanda zai haifar da nakasar da ba ta dace ba yayin aiwatar da extrusion. Yana haifar da ƙarin ƙarin damuwa mai ƙarfi, wanda ya zama tushen fashe da fashe a saman samfuran extruded. The zafi extrusion tsari na titanium da titanium gami kayayyakin ne mafi rikitarwa fiye da na aluminum gami, jan karfe gami da karfe, wanda aka ƙaddara ta musamman jiki da kuma sinadaran Properties na titanium da titanium gami.

Ya zuwa yanzu, dole ne a yi amfani da man shafawa a cikin aikin extrusion na sandunan titanium. Babban dalilin shi ne cewa titanium zai samar da fusible eutectic tare da baƙin ƙarfe tushen ko nickel tushen gami mold kayan a yanayin zafi na 980 digiri da 1030 digiri, game da shi sa mold ya gaji da ƙarfi. Lokacin amfani da man shafawa na graphite, za a iya samun ɓarna mai zurfi a saman samfurin, wanda shine sakamakon aikin machining - titanium sanda da titanium gami sanda mai mannewa ga mold. Lokacin fitar da bayanin martaba tare da mai mai gilashi, zai haifar da sabon nau'in lahani "pitting", wato, fashewa a cikin saman saman samfurin. Bincike ya nuna cewa bayyanar “alamomi” yana faruwa ne saboda ƙarancin ƙarfin wutar lantarki na titanium da titanium, wanda ke sa saman saman billet ɗin ya yi sanyi da ƙarfi sannan kuma robobi ya ragu sosai.

Titanium alloys an rarraba su azaman ƙarancin ƙarfi mai ƙarfi mai ƙarfi, matsakaici-ƙarfi da ƙarfi mai ƙarfi, kuma kewayo daga 200 (ƙananan ƙarfi) zuwa 1300 (ƙarfin ƙarfi) MPa, amma gabaɗaya alloys titanium ana iya ɗaukar alloys masu ƙarfi. . Sun fi ƙarfin ƙarfe na aluminum, waɗanda ake la'akari da su zama matsakaicin ƙarfi, kuma suna iya maye gurbin wasu nau'in ƙarfe a cikin ƙarfin gaba ɗaya. Idan aka kwatanta da saurin raguwar ƙarfin ƙarfe na aluminum a yanayin zafi sama da 150 ° C, wasu alluran titanium na iya ci gaba da ƙarfafa ƙarfi a 600 ° C. Ƙarƙashin ƙarfe na ƙarfe yana da daraja sosai ta masana'antar jirgin sama saboda nauyin haske da ƙarfinsa fiye da yadda ya kamata. aluminum gami, wanda zai iya kula da mafi girma ƙarfi fiye da aluminum a high yanayin zafi. Ganin cewa yawan titanium shine 57% na ƙarfe, takamaiman ƙarfinsa (ƙarfin / nauyi rabo ko ƙarfin / ƙima ana kiransa takamaiman ƙarfi) yana da girma, kuma juriya na lalata, juriya na iskar shaka, da juriya na gajiya suna da ƙarfi. 3/4 na titanium gami da ake amfani da Tsarin kayan wakilta jirgin tsarin gami ana amfani da yafi lalata-resistant gami. Titanium alloy yana da ƙarfi mai ƙarfi da ƙarancin ƙima, kyawawan kaddarorin injina, mai kyau tauri da juriya na lalata. Bugu da ƙari, titanium alloys suna da mummunan aiki na tsari kuma suna da wuya a yanke. A cikin aiki mai zafi, yana da sauƙi don ɗaukar ƙazanta irin su hydrogen, oxynitride da carbon. Hakanan akwai ƙarancin juriya na abrasion da tsarin samarwa mai rikitarwa. An fara samar da titanium masana'antu a shekarar 1948. Bukatar bunkasa masana'antar sufurin jiragen sama ya baiwa masana'antar titanium damar girma a matsakaicin ci gaban shekara na kusan kashi 8%. A halin yanzu, abin da ake samarwa a duniya na kayan da aka sarrafa a duk shekara ya kai fiye da ton 40,000 kusan nau'ikan titanium gami da maki 30. Mafi yadu amfani titanium gami ne Ti-6Al-4V (TC4) 'Ti-5Al-2.5Sn (TA7) da kuma masana'antu tsarki titanium (TA1, TA2 da TA3).

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