Q1: Cov kauj ruam tseem ceeb hauv cov kauj ruam ntau lawm ntawm Q390 cov yeeb nkab steel?
Kev tsim cov Q390 steel yeeb tau tsuas yog suav nrog steelmaking, txuas ntxiv casting, dov, kev kho cua sov thiab kuaj xyuas sov thiab kuaj Lub LF + Vd kev ua kom zoo dua ntawm cov txheej txheem steelming kom nruj tswj cov sulfur thiab phosphorus cov ntsiab lus (ob qho tsawg dua lossis sib npaug nrog 0.030%). Electromagnetic stirring yog siv thaum nruam caj ces kom txo qis cais thiab txhim kho cov khoom lag luam hlau. Cov tswj hwm dov thiab tswj txias (TMCP) yog siv nyob rau hauv kub rolling theem los ua kom zoo dua ntawm microstructure thiab cov khoom. Norchizing lossis quenching thiab tempering kev kho yog qhov yuav tsum tau txhim kho kev txhim kho lub zog thiab tawv. Thaum kawg, kev sim ua tsis zoo (UT, MT, thiab lwm yam) thiab cov khoom sib tw tshuab ua yog kom ntseeg tau tias cov khoom lag luam tsim nyog.
Q2: Vim li cas yuav tsum Q390D / e steel yeeb nkab raug?
Kev kho kho ib txwm muaj peev xwm tshem tawm cov kev ntxhov siab uas muaj kev ntxhov siab ntau dua tom qab kub thiab tiv thaiv qis qis-kub brittle baritture. Ib qho kev sib tw ferrite + PETLLIite qauv tuaj yeem tau los ntawm cov cua sov mus rau qhov chaw austenite (880 ~ 920 txias. Li cas los hloov cov nplej (lis loj loj dua li lossis sib npaug rau 8 qib) thiab cuam tshuam cov kev cuam tshuam nyuaj ntawm cov yeeb nkab steel. Piv nrog kub-rolled lub xeev, qhov tsawg-kub cuam tshuam lub zog ntawm Q390D / E tom qab ib txwm muaj siab dua, sib ntsib ntawm -20℃lossis -40 degree. Tsis tas li ntawd, kev coj ua tuaj yeem txhim kho kev ua haujlwm ua thiab vuam kev kawm, thiab txo qhov xav tau ntawm kev kho cua sov tom ntej.
Q3: Cov kev xav tau tshwj xeeb rau kev tsim cov Q390 kav hlau ua dab tsi?
Q390 Welded Steel kav yuav tsum tau submeren vuam cov txheej txheem (xws li submerged arc vuam pom lossis high-zaus vuam HFW) kom txo txoj kev pheej hmoo ntawm cov kab nrib pleb Cov ntaub ntawv vuam yuav tsum sib phim ua kev ua haujlwm ntawm cov hlau siv vuam (xws li H08MN) )nia) raug pom zoo kom txhim kho qis-kub. Tom qab vuam, hauv zos lossis tag nrho kev ua haujlwm ib txwm muaj los tshem tawm cov kev ntxhov siab vuam. Weld yuav tsum raug sim los ntawm Ultrasonic (UT) thiab yog iPhone li (RT) kom ntseeg tau tias tsis muaj qhov tsis xws luag. Rau kev siv kub tsawg, A -20℃lossis -40℃cuam tshuam kom ntseeg tau tias qhov tawv ntawm Weld thiab kub-cuam tshuam cov qauv.
Q4: How to ensure the quality of thick-walled Q390 steel pipes (>50 hli)?
Tuab-walled steel kav yuav tsum tau nruj tus txheej txheem Rolling kom ntseeg tau tias compression piv tau ntau dua los yog sib npaug rau cov tub ntxhais los tiv thaiv cov xoob. Lub sijhawm tuav (2.4min / hli) yuav tsum tau txuas ntxiv thaum ib txwm ua kom ntseeg tau tias cov qauv tseem ceeb yog tag nrho cov kev hloov pauv. Kev sim ultrasonic (U) yuav tsum tau tsom rau kev kuaj xyuas qhov tsis xws luag (xws li suav nrog thiab delamination). Cov cuab yeej kuaj cov cuab yeej yuav tsum tau kuaj ntawm 1/4 ntawm phab ntsa tuab kom ntseeg tau tias niaj hnub ua tau zoo tag nrho. Tsis tas li ntawd, tuab-walled pipes yuav tsum tau mus kuaj cov dej ua ntej tawm hauv lub Hoobkas kom txheeb xyuas lub siab muaj peev xwm.
Q5: Cov Qauv Tseem Ceeb Rau Q390 Cov Kav Hlau?
Cov qauv hauv tsev muaj xws li GB / T 1591 (GB / T 8162 (thiab GB / T 9711 L415M (pipeline kav). Cov Qauv Thoob Ntiaj Teb muaj xws li en 10210 (s355j2h) thiab AVEM A572 GRO60 (kev cuam tshuam ntxiv yuav tsum tau). Cov khoom xa tawm yuav tsum ua raws li CE, PED thiab lwm yam ntawv pov thawj, thiab muab cov ntawv qhia txog kev kub ntxhov tsawg. Cov qauv sib txawv muaj qhov sib txawv me ntsis rau cov tshuaj sib txawv, cov khoom siv neeg siv cov neeg siv tshuab, thiab kuaj cov qauv tsim nyog yuav tsum raug xaiv.
