Domin inganta surface taurin da sa juriya nabututu rectangular, ana iya sarrafa wasu daga cikin saman, watau fuskar harshen wuta mai tsafta, mai tsayi, tsaka-tsaki mai tauri da wasu magunguna da makamantansu.Gabaɗaya high, matsakaicin mita taurin mafi yawan, ana mai zafi a zazzabi na 850-950.℃.Idan aka ba da ƙarancin thermal conductivity, don haka dumama gudun ba da sauri, in ba haka ba zai narke da wasu lahani quenching fasa.Bukatun tauraruwar shigar da bututu Rectangular tana daidaita ƙungiyar matrix galibi pearlite ne.Ruwan fesa mai sanyaya ko maganin ruwa na polyvinyl barasa, zazzabi mai zafi a cikin kewayon 200-400℃, Tauri 40-50HRC, taurin da kuma sa juriya don tabbatar da Rectangular bututu surface.

Maganin zafi na bututun rectangular shima yana da fa'idodi guda uku masu zuwa:

(A) Babban kwanciyar hankali don madaidaicin bututu na rectangular, wanda ke buƙatar madaidaicin madaidaicin, dole ne ya kula da kwanciyar hankali, saboda sakamakon makaranta madaidaiciya a cikin iska, ƙimar sanyaya yana jinkirin, don haka rawar austenite ya daidaita zai ƙara yawan adadin da aka riƙe. austenite nama rectangular bututu, dole ne ya zama sanyi magani;

(B) Rage quenching murdiya saboda elongated square da rectangular tube, don haka taurare tsari sauƙi maras kyau, shi dole ne a tsananin sarrafawa nakasawa, zafi magani ne mai muhimmanci mataki a cikin quenching tsari, da yin amfani da filastik a supercooled austenite dace jeri, wanda shi ne. Mahimmin mataki don tabbatar da daidaiton ƙimar su, wanda ya kamata ya zama zafi mai kashewa ko sanyaya zafi daidaitawa wani lokaci yayin da ya kamata a rataye dumama a kan dumama, don rage naƙasa taurin mai, don babban jirgin ƙasa mai jagora, don rage nakasawa. na gas nitriding ko plasma nitriding, da dai sauransu;

(C) High taurin main square da rectangular tube jure lamba gajiya lodi, dole ne ya sami babban taurin, sabili da haka ya kamata a hardening, ko hardening ko sinadaran zafi magani, bi da tempering tsari.