Shapedirƙiri na musamman mai walƙiya na lu'u-lu'u

Saboda babban ƙarfin makamashi a tsakanin lu'u-lu'u da kuma ƙarfe na gaba ɗaya da gwal, ƙirar lu'u-lu'u ba za a iya shigar da su ta hanyar ƙara girman narkewar ginin ba, tare da rashin haɗin kai mara kyau. A cikin fasahar kere kere ta gargajiya, barbashi mai lu'u-lu'u kawai ya dogara da karfin murƙushewar injiniya da aka haifar ta hanyar lalacewa ta hanyar matrix don inlay a cikin matrix na matrix, amma ba samar da ƙaƙƙarfan haɗin haɗin gwal ko ƙarfe ba, sakamakon haifar da lu'u-lu'u Yana da sauƙi don rarrabewa daga tushe na karfe na matrix a cikin aiki, wanda ya rage rayuwar sabis da matakin aikin kayan aikin lu'u-lu'u. A cikin mafi yawan kayan aikin da ba a cika amfani da su ba, yawan amfani da lu'u-lu'u yana da ƙasa, kuma adadin lu'u-lu'u masu tsada sun ɓace a cikin kwakwalwan ɓoye. Lin Zengdong ya jagoranci aikin amfani da fasahar metallization fasahar lu'u-lu'u don ba da kyakkyawan yanayin lu'u-lu'u tare da sabbin halaye masu kyau, kamar kyakkyawan halayen thermal, kwanciyar hankali mai kyau, haɓaka ƙayyadaddun kayan jikinsa da sinadarai, haɓaka ƙoshin ruwansa zuwa ƙarfe ko maganin gwal, da sauransu.
Hadin gwiwar dutsen lu'u-lu'u ya jawo hankalin masu masana'antar kayan lu'u-lu'u a gida da kasashen waje tun daga shekarun 1970. *** Kodayake an tabbatar da cewa wasu karafa kamar tungsten (ba oxidized ba) na iya samarda WC Layer a saman lu'u-lu'u a ƙaramin zazzabi (kimanin 800 ℃), ana iya samun ƙarfin haɗin gwiwa ta dumama don awa 1 a ƙarƙashin injin sama da sama da 600 ℃ gwargwadon aikin da aka yi amfani da shi don gane yanayin dutsen lu'u-lu'u. Dangane da yanayin karkatar da kayan aikin lu'ulu'u na yau da kullun da aka saba amfani dashi, ba zai yiwu ace za a kafa ƙaramin metallized akan dutsen lu'u-lu'u ba idan aka mai da shi na tsawan mintuna 5 a 900 ℃ a cikin vacuum ko maras matsi. Domin ko ana aiki da kwayar zarra mai ƙarfi (Ti, V, Cr, da dai sauransu) akan wadatar lu'u-lu'u ko ƙaddamarwar ma'amala ta haɗu da haɗin ƙarfe na haɗin gwal da lu'u-lu'u tsari ne na atomic. Dangane da zazzabi da ake amfani da shi don matsi mai zafi da kuma irin wannan ɗan gajeren lokaci, wannan tsari ba shi da ƙima. A karkashin yanayin m lokaci sintering (wani lokacin akwai wani karamin adadin low ƙarfi da low narke aya karfe ko gami ruwa ruwa lokaci), da sinadaran bondding ko ƙarfe bondding karfi na matrix zuwa lu'u-lu'u ne mai rauni sosai ko kuma ba zai samar da kwata.
Tsarin riga na yanayin lu'u-lu'u shine ba babban buri ba, amma ɗayan matakan don fahimtar haɗarin sinadaran ƙarfe ne tare da ƙarfe na matrix. Bayan lu'u-lu'u mai rufi ya zama zunubi a cikin hakoran lu'u lu'u, lu'u lu'u da aka fallasa a sashin yanki mai lalacewa ya lullube rufin, kuma saman ragowar ramuka na da laushi, wanda da alama yana nuna cewa lu'u-lu'u da matrix basu kai matakin sunadaran cak. Sabili da haka, koda an tabbatar da ƙarfe pre metallization na lu'u-lu'u, hanyar gargajiya ta-zamani foda ƙarfe ƙarfe sintering Hanyar ba zai iya gane m hade tsakanin lu'u-lu'u da matrix abu.