Q345wani nau'i ne na ƙananan ƙarfe wanda ake amfani da shi sosai a cikin gadoji, motoci, jiragen ruwa, gine-gine, tasoshin matsa lamba, kayan aiki na musamman, da dai sauransu, inda "Q" yana nufin ƙarfin samar da ƙarfi, kuma 345 yana nufin cewa ƙarfin ƙarfin wannan karfe shine 345MPa.
Gwajin q345 na karfe ya ƙunshi abubuwa biyu: na farko, ko abin da ke cikin ƙarfen ya kai matsayin ƙasa; na biyu, ko ƙarfin yawan amfanin ƙasa, gwajin ƙwanƙwasa, da dai sauransu na ƙarfe ya cika ka'idodi ta hanyar cibiyoyin kwararru. Yana yana da daban-daban gami abun ciki daga q235, wanda shi ne talakawa carbon karfe da q345 ne low gami karfe.
Rarraba kayan Q345
Q345 za a iya raba zuwa Q345A, Q345B, Q345C, Q345D da Q345E bisa ga sa. Abin da suke wakilta shi ne cewa yanayin zafin tasirin ya bambanta. Q345A matakin, babu tasiri; Q345B matakin, 20 digiri na al'ada zazzabi tasiri; Q345C matakin, 0 digiri tasiri; Q345D matakin, -20 digiri tasiri; matakin Q345E, -40 tasiri. A yanayin zafi daban-daban na tasiri, ƙimar tasirin kuma sun bambanta.
daban.
Amfani da kayan Q345
Q345 yana da ingantattun kaddarorin inji, ingantaccen aikin ƙarancin zafin jiki, filastik mai kyau da weldability. Ana amfani da shi azaman matsakaici da ƙananan tasoshin ruwa, tankunan mai, motoci, cranes, injin ma'adinai, tashoshin wutar lantarki, gadoji da sauran tsarin, sassa na inji, tsarin gine-gine, da tsarin gaba ɗaya waɗanda ke ɗaukar nauyi mai ƙarfi. Ƙarfe tsarin sassa, amfani da zafi-birgima ko al'ada yanayi, za a iya amfani da daban-daban Tsarin a cikin sanyi yankunan kasa -40 ° C.