A cikin masana'antar mirgina karfe, naɗaɗɗen da ake amfani da su a cikin mirgina sanyi da layukan mirgina masu zafi sune mahimman abubuwan haɗin gwiwa. Saboda matakai daban-daban da yanayin amfani na biyun, akwai kuma bambance-bambance masu mahimmanci a cikin zaɓin kayan nadi. Za mu bincika dalla-dalla bambance-bambancen zaɓin kayan aiki tsakanin nadi da aka yi amfani da su a cikin mirgina sanyi da layukan mirgina masu zafi.
Da fari dai, akwai babban bambanci a yanayin zafin aiki tsakanin naɗaɗɗen layin sanyi da naɗaɗɗen layi mai zafi. Ana yin layukan mirgina masu zafi a yanayin zafi mai zafi kuma yawanci suna buƙatar jure yanayin zafi har zuwa 1200 ℃. Sabili da haka, kayan nadi na layin mirgina mai zafi dole ne ya sami kyakkyawan aiki mai zafi da juriya na thermal. Abubuwan gama gari sun haɗa da babban simintin simintin gyare-gyare na chromium, ƙarfe mai sauri, da ƙarfe mai jure zafi. Wadannan kayan ba kawai suna kula da ƙarfi da taurin kai a yanayin zafi ba, har ma suna tsayayya da iskar shaka da lalata mai zafi, ta haka ne ke ƙara rayuwar sabis na rolls.
Akasin haka, ana yin layukan mirgina sanyi a ko kusa da zafin jiki, don haka rolls ɗin baya buƙatar jure yanayin zafi. Duk da haka, a lokacin sanyi mirgina tsari, saboda high bukatun ga surface ingancin da takardar karfe, da surface taurin da lalacewa juriya na Rolls ne musamman muhimmanci. Cold Rolling Line Rolls yawanci ana yin su ne da kayan aiki irin su kayan aiki na ƙarfe, kayan aikin carbon, ko ƙarfe mai chrome plated. Wadannan kayan suna da tsayin daka da juriya, wanda zai iya tabbatar da cewa ba'a iya sawa saman rolls ɗin cikin sauƙi yayin amfani mai ƙarfi na dogon lokaci, don haka tabbatar da ingancin samfurin.
Abu na biyu, nauyi da matsa lamba na rolls a kan jujjuyawar sanyi da layukan mirgina masu zafi ma sun bambanta. Layin mirgina mai zafi yana buƙatar damfara ƙananan ƙarfe na ƙarfe mai zafin jiki a cikin ƙayyadaddun ƙayyadaddun faranti na ƙarfe, kuma rolls ɗin suna buƙatar tsayayya da babban matsin lamba da tasiri, don haka ana buƙatar kayan don samun ƙarfi da ƙarfi mai kyau. Layin mirgina sanyi, saboda ana aiwatar da shi a ƙananan yanayin zafi, galibi yana ɗaukar ƙarfi mai ƙarfi da juzu'i akan nadi. Don haka, zaɓin kayan aikin nadi mai sanyi ya fi mai da hankali kan juriya da gajiyarsu.
Bugu da kari, tsarin samar da na'urorin yin birgima na sanyi yakan ƙunshi ƙarin hanyoyin jiyya na ƙasa, kamar plating na chrome, quenching, da sauransu, don ƙara haɓaka taurin saman su da juriya. Koyaya, saboda aiki a cikin yanayin zafi mai zafi, waɗannan hanyoyin jiyya na saman ba su dace da jujjuyawar layi mai zafi ba. Madadin haka, ana haɓaka aikin su ta hanyar haɗaɗɗun gami da tsarin kula da zafi na kayan kanta.
In summary, there are significant differences in the material selection of rolls for cold rolling and hot rolling lines, mainly reflected in the different requirements for working temperature, load, pressure, and surface quality. Hot rolling line roll materials need to have excellent high-temperature performance and thermal fatigue resistance, while cold rolling line roll materials emphasize high hardness and high wear resistance. Understanding and correctly selecting suitable roll materials is of great significance for ensuring the stability of the rolling process and product quality. As always, we sincerely appreciate your support and business. Please do not hesitate to contact ssophie@welongchina.com if you have any questions or concerns. We look forward to continuing our partnership with you.
Lokacin aikawa: Jul-01-2024
