Q345 ni ibikoresho byuma.Nicyuma gike cyane (C <0.2%), gikoreshwa cyane mubwubatsi, ibiraro, ibinyabiziga, amato, ubwato bwumuvuduko, nibindi Q byerekana imbaraga zumusaruro wibi bikoresho, naho 345 ikurikira bivuga agaciro k'umusaruro wibi ibikoresho, bingana na MPa 345.Kandi umusaruro uzagabanuka hamwe no kwiyongera kwubunini bwibintu.
Q345 ifite imiterere yubukanishi yuzuye, yemewe yubushyuhe buke, plastike nziza nogusudira, kandi ikoreshwa nkibikoresho, ibice byubukanishi, inyubako zubaka, ibice rusange byubatswe byuma, bishyushye cyangwa bisanzwe, birashobora gukoreshwa muburyo butandukanye mukarere gakonje hepfo -40 ° C.
Ibyiciro
Q345 irashobora kugabanywa muri Q345A,Q345B, Q345C, Q345D, Q345E ukurikije amanota.Ibyo bahagarariye ahanini ni ubushyuhe bwo guhungabana.
Urwego Q345A, nta ngaruka;
Urwego Q345B, dogere 20 ingaruka zubushyuhe busanzwe;
Urwego Q345C, ni ingaruka ya dogere 0;
Urwego Q345D, ni -20 impamyabumenyi;
Urwego Q345E, ni -40 ingaruka.
Ku bushyuhe butandukanye, ihungabana ryagaciro naryo riratandukanye.
ibigize imiti
Q345A ： C≤0.20, Mn ≤1.7 ， Si≤0.55 ， P≤0.045 ， S≤0.045 ， V 0.02 ~ 0.15 ；
Q345B ： C≤0.20 ， Mn ≤1.7 ， Si≤0.55 ， P≤0.040 ， S≤0.040 ， V 0.02 ~ 0.15 ；
Q345C ： C≤0.20 ， Mn ≤1.7 ， Si≤0.55 ， P≤0.035 ， S≤0.035 ， V 0.02 ~ 0.15 ， Al≥0.015 ；
Q345D ： C≤0.20 ， Mn ≤1.7 ， Si≤0.55 ， P≤0.030 ， S≤0.030 ， V 0.02 ~ 0.15 ， Al≥0.015 ；
Q345E ： C≤0.20 ， Mn ≤1.7 ， Si≤0.55 ， P≤0.025 ， S≤0.025 ， V 0.02 ~ 0.15 ， Al≥0.015 ；
umurongo wa 16Mn
Q345 ibyuma bisimbuza ibirango bishaje bya 12MnV, 14MnNb, 18Nb, 16MnRE, 16Mn nubundi bwoko bwibyuma, ntabwo bisimbuza ibyuma 16Mn gusa.Kubijyanye nibigize imiti, 16Mn na Q345 nabyo biratandukanye.Icy'ingenzi cyane, hari itandukaniro rinini mubunini bwitsinda ryubunini bwibyuma byombi ukurikije itandukaniro ryimbaraga zumusaruro, kandi ibi byanze bikunze bizatera impinduka mubitekerezo byemewe byibikoresho bifite umubyimba runaka.Ntabwo rero, bidakwiye gukoresha gusa impungenge zemewe za 16Mn ibyuma kuri Q345, ariko imihangayiko yemewe igomba kongera kugenwa ukurikije ubunini bushya bwitsinda ryibyuma.
Ikigereranyo cyibintu nyamukuru bigize ibyuma bya Q345 ahanini ni kimwe nicyuma cya 16Mn, itandukaniro nuko ibice bya trose bivangwa na V, Ti na Nb byongeweho.Umubare muto wa V, Ti, na Nb bivangavanze birashobora gutunganya ibinyampeke, bigatezimbere cyane ubukana bwibyuma, kandi bikazamura cyane imiterere yubukorikori bwuzuye.Niyo mpamvu kandi umubyimba wicyuma gishobora gukorwa nini.Kubwibyo, imiterere yubukanishi yuzuye ya Q345 igomba kuba nziza kurenza ibyuma 16Mn, cyane cyane imikorere yubushyuhe buke ntibiboneka mubyuma 16Mn.Imyitwarire yemewe yicyuma cya Q345 irarenze gato ugereranije nicyuma cya 16Mn.
kugereranya imikorere
Q345Dumuyoboroibikoresho bya mashini:
Imbaraga zingana: 490-675 Imbaraga zitanga umusaruro: ≥345 Kurambura: ≥22
Q345Bumuyoboroibikoresho bya mashini:
Imbaraga zingana: 490-675 Imbaraga zitanga umusaruro: ≥345 Kurambura: ≥21
Q345A imiyoboro yubukorikori idafite uburinganire:
Imbaraga zingana: 490-675 Imbaraga zitanga umusaruro: ≥345 Kurambura: ≥21
Q345C imiyoboro idafite imashini:
Imbaraga zingana: 490-675 Imbaraga zitanga umusaruro: ≥345 Kurambura: ≥22
Q345E imashini idafite imiyoboro:
Imbaraga zingana: 490-675 Imbaraga zitanga umusaruro: ≥345 Kurambura: ≥22
Urukurikirane rw'ibicuruzwa
Q345D ibyuma ugereranije na Q345A, B, C.Ubushyuhe bwikigereranyo cyingufu zubushyuhe buke ni buke.Imikorere myiza.Umubare wibintu byangiza P na S biri munsi yibya Q345A, B na C. Igiciro cyisoko kiri hejuru ya Q345A, B, C.
Ibisobanuro bya Q345D:
Igizwe na Q + umubare + ikimenyetso cyiza cyiza + ikimenyetso cya deoxidation.Umubare wibyuma wabanjirijwe na "Q", ugereranya aho umusaruro wibyuma, naho umubare uri inyuma yerekana agaciro k’umusaruro muri MPa.Kurugero, Q235 yerekana ibyuma byubaka karubone bifite umusaruro (σs) wa 235 MPa.
②Niba bibaye ngombwa, ikimenyetso cyerekana urwego rwiza hamwe nuburyo bwa deoxidation burashobora gushyirwaho inyuma yumubare wibyuma.Ibimenyetso byujuje ubuziranenge ni A, B, C, D.Ikimenyetso cyuburyo bwa Deoxidation: F bisobanura ibyuma bitetse;b bisobanura ibyuma byicwa igice;Z bisobanura ibyuma byishe;TZ bisobanura ibyuma bidasanzwe byiciwe, kandi ibyuma byiciwe ntibishobora gushyirwaho ibimenyetso, ni ukuvuga Z na TZ byombi bishobora kuvaho.Kurugero, Q235-AF bisobanura Icyiciro A Icyuma kibira.
Steel Ibyuma bya karubone kubikorwa byihariye, nkicyuma cyikiraro, ibyuma byo mu nyanja, nibindi, ahanini bikoresha uburyo bwo kwerekana ibyuma byubaka ibyuma, ariko ibaruwa yerekana intego yongewe kumpera yicyuma.
Intangiriro y'ibikoresho
| element | C≤ | Mn | Si≤ | P≤ | S≤ | Al≥ | V | Nb | Ti |
| ibirimo | 0.2 | 1.0-1.6 | 0.55 | 0.035 | 0.035 | 0.015 | 0.02-0.15 | 0.015-0.06 | 0.02-0.2 |
Ibikoresho bya Q345C nuburyo bukurikira (%):
| Igipimo cyimiterere yimashini | Kurambura (%) | Ubushyuhe bwo gupima 0 ℃ | Imbaraga zingana MPa | Gutanga umusaruro MPa≥ |
| agaciro | δ5≥22 | J≥34 | σb （470-650） | σs （324-259） |
Iyo uburebure bwurukuta buri hagati ya 16-35mm, σs≥325Mpa;iyo uburebure bwurukuta buri hagati ya 35-50mm, σs≥295Mpa
2. Ibiranga gusudira biranga Q345
2.1 Kubara karubone ihwanye (Ceq)
Ceq = C + Mn / 6 + Ni / 15 + Cu / 15 + Cr / 5 + Mo / 5 + V / 5
Kubara Ceq = 0.49%, irenga 0.45%, urashobora kubona ko imikorere yo gusudira ibyuma bya Q345 atari byiza cyane, kandi hagomba gushyirwaho ingamba zikomeye zikoranabuhanga mugihe cyo gusudira.
2.2 Ibibazo bikunze kugaragara muri Q345 ibyuma mugihe cyo gusudira
2.2.1 Gukomera gukabije muri zone yibasiwe nubushyuhe
Mugihe cyo gusudira no gukonjesha ibyuma bya Q345, imiterere yazimye-martensite ikorwa byoroshye muri zone yibasiwe nubushyuhe, ibyo bikaba byongera ubukana kandi bikagabanya plastike yakarere kegeranye.Igisubizo ni ibice nyuma yo gusudira.
2.2.2
Ibice byo gusudira ibyuma bya Q345 nibice bikonje.
Igihe cyo kohereza: Werurwe-20-2023