Coiling zafin jiki tasiri Properties a kan tsiri

Bayan gama mirgina tsiri, sanyaya ruwa a cikin Layer don canza kewayon zafin jikiα an danne sosai.A ƙarƙashin mafi yawan eutectoid ferrite nucleation da girma a cikin zafin jiki na coiling, ana iya la'akari da cikar yanayin sanyi sosai da kama da tsarin canji na isothermal, sabili da haka, yana shafar yanayin zafi a kan microstructure da kaddarorin karfe da aka fahimta azaman tasirin canje-canje a cikin zafin jiki. .Don haka tasirin zafin jiki na murɗawa akan microstructure da kaddarorin ƙarfe yana da matuƙar mahimmanci.Lokacin da yanayin zafi ya yi girma, ƙaƙƙarfan hatsi na ferrite iri ɗaya ne, wanda ya yi ƙasa da ƙasa saboda canjin yanayin sanyi sosai.α, ƙasan abubuwan nucleation, galibi a iyakokin hatsi na firamareγ hatsi, da girma gudun fiye da ferrite azumi saboda.Lokacin da yanayin zafi ya yi ƙasa,α ya karu da adadin nucleation, saurin girma yana rage jinkirin ferrite, girman hatsin ferrite ya zama ƙarami, amma yana ƙoƙarin yada pearlite mai kyau.Tare da raguwar zafin jiki na gyaran ƙwayar ferrite, adadin acicular ferrite ya ƙaru a hankali, yana ƙaruwa abun ciki na pearlite, tazarar lamellar pearlite yana raguwa a hankali.Don haka, tare da ƙananan zafin jiki na coiling, ƙarfin ƙarfin zai ƙaru, yayin da ma'aunin filastik ya ragu kaɗan, wanda shine carbon da ferritic gami abubuwa sabodaγ-α canjin lokaci a ƙananan yanayin zafi da aka samu lokacin da abun ciki na babban exigencies.Lokacin da ƙarshen sanyi sanyi ya yi ƙasa da ƙasa, yawan amfanin ƙasa ya inganta haɓakar haɓakawa, saboda yawancin ƙarni na biyu, musamman ma ma'anar bainite karfe filastik na rashin amfani.

Coiling zazzabi kula da tasiri a kan microstructure

Metallurgical injuna kayan aiki, coiling zafin jiki da kuma gama mirgina zafin jiki, a matsayin tasiri na babban karfe microstructure, shi ne daya daga cikin ƙayyadaddu na gama karfe aiki, inji Properties na muhimman tsari sigogi.Coiling zafin jiki kula da gaske ne samar da zafi-birgima tsiri karfe mirgina sarrafawa sanyaya, da kuma kula da sanyaya bayan mirgina manyan abubuwan da suka shafi ingancin kayayyakin ne farkon sanyaya (sanyi fara zafin jiki ne m karewa zafin jiki) da kuma karshen zafin jiki, sanyaya. gudun da daidaito na sanyaya.Yanayin zafin jiki ya kamata ya kasance ƙasa da 670℃, gabaɗaya 600 ~ 650℃.A cikin wannan jeri na zafin jiki, injin ƙarfe na ƙarfe microstructure ya ƙare, zai iya rage sanyaya da jinkirin sanyaya don rage damuwa na ciki na tsiri shima yana da fa'ida.Coiling zafin jiki ya yi yawa, zai haifar da recrystallization da jinkirin sanyaya bayan coiling samar da nama tara da kuma m hatsi carbides, sakamakon da tabarbarewar na inji Properties da kuma ƙarni na baƙin ƙarfe fata fata, don haka pickling wuya.Idan coiling zafin jiki ya yi ƙasa da ƙasa, yayin da iska mai wuya, da kuma kasancewar saura danniya, sauƙi unwinding, rinjayar ingancin ƙãre tsiri;wani hannun, da coiling zafin jiki bai isa ya sa supersaturated carbonitrides hazo, shafi yi birgima.Don haka, sarrafa zafin jiki na narkar da microstructure na ciki a cikin iyakar da karfe ya ayyana, wani mahimmin ma'auni ne na sarrafa kayan aikin ƙarfe ingancin tsiri.Daban-daban iri da kuma ƙayyadaddun tsiri, ta tip mirgina karewa zafin jiki ne kullum 800℃, sosai daidaitacce silicon karfe karewa zafin jiki ne yawanci 980℃, alhãli kuwa a cikin fiye da 100 m tsawo na karfe fitarwa rollers gudu lokaci na 5 zuwa 158 kawai.Domin a cikin irin wannan gajeren lokaci don rage tsiri zazzabi 200 ~ 350℃, zafi radiation kadai karfe fitarwa rollers da abin nadi zafi zuwa halitta sanyaya hanya ba zai yiwu ba, da fitarwa rollers dole ne sosai Kafa dogon nesa high-inganci ruwa sanyaya nufin ga tsiri, tilasta sanyaya na ruwa surface, da kuma don daidai sarrafa adadin ruwa don saduwa da buƙatun zafin jiki na murɗa.Specific aiwatar coiling zazzabi kula dogara ne a kan karfe injiniyoyi daban-daban halaye na tsiri (kayan, size), da kuma daban-daban jihohi na wannan tsiri batu (zazzabi, gudun), da kwarara ta cikin tsawon da sanyaya Layer (watau bude sanyaya. Adadin taken) na daidaitawa mai ƙarfi na jimlar tsayin tsiri zuwa wani takamaiman wuri daga madaidaicin zafin juyi na ƙarshe na Qian zuwa zafin iska na saurin sanyaya da ake buƙata.