Xov Xwm - Cov Hlau Kub-Kuav Los Ntawm Cov Hlau: Lub Hauv Paus Tseem Ceeb ntawm Kev Lag Luam

Hauv kev lag luam niaj hnub no, cov hlau kub dov yog cov khoom siv yooj yim, thiab lawv cov qauv sib txawv thiab kev ua tau zoo sib txawv cuam tshuam ncaj qha rau kev txhim kho kev lag luam hauv qab. Cov qauv sib txawv ntawm cov hlau kub dov ua lub luag haujlwm tseem ceeb hauv kev tsim kho, tsheb, lub zog, thiab lwm yam nrog lawv cov tshuaj lom neeg tshwj xeeb thiab cov khoom siv kho tshuab. Cov hauv qab no yuav tsom mus rau kev tshuaj xyuas cov qauv hlau kub dov nrog qhov kev thov siab tshaj plaws hauv kev lag luam thiab lawv qhov sib txawv tseem ceeb.

Lub Zog Tseem Ceeb: Q235B thiab SS400
Q235B yog cov hlau uas siv cov pa roj carbon tsawg tshaj plaws hauv Suav teb, nrog cov ntsiab lus carbon ntawm kwv yees li 0.12% -0.20%, thiab muaj cov khoom yas zoo thiab vuam zoo. Nws lub zog tso zis yog ≥235MPa thiab siv dav hauv cov thav duab tsev, kev txhawb nqa choj thiab cov khoom siv kho tshuab dav dav. Hauv kev lag luam kev tsim kho, I-beams, channel steels thiab lwm yam hlau ua los ntawm Q235B kub-kuav hlau coils suav rau ntau dua 60%, txhawb nqa lub cev pob txha ntawm cov hauv paus hauv nroog.
SS400 yog cov hlau carbon uas siv thoob ntiaj teb nrog lub zog zoo ib yam li Q235B, tab sis kev tswj hwm nruj dua ntawm cov sulfur thiab phosphorus impurities thiab zoo dua qhov chaw. Hauv kev tsim nkoj, SS400 cov kauj kub dov feem ntau siv rau cov khoom siv ntawm lub nkoj. Nws qhov kev tiv thaiv corrosion hauv dej hiav txwv zoo dua li cov hlau carbon ib txwm muaj, ua kom muaj kev nyab xeeb ntawm kev caij nkoj hauv dej hiav txwv.

Cov Neeg Sawv Cev Muaj Zog: Q345B thiab Q960
Q345B yog cov hlau uas tsis muaj zog thiab muaj zog heev uas muaj 1.0% -1.6% manganese ntxiv, thiab lub zog tawm los siab dua 345MPa. Piv nrog Q235B, nws lub zog nce ntxiv li 50%, thaum tswj tau qhov vuam zoo. Hauv kev tsim choj, lub thawv girders ua los ntawm Q345B cov hlau kub dov tuaj yeem txo qhov hnyav los ntawm 20%, txo cov nqi tsim kho. Xyoo 2023, kev tsim choj hauv tsev yuav siv ntau dua 12 lab tons ntawm Q345B cov hlau kub dov, suav txog 45% ntawm tag nrho cov zis ntawm hom no.
Ua tus sawv cev ntawm cov hlau muaj zog heev, Q960 ua tiav lub zog tso zis ntawm ≥960MPa los ntawm kev siv tshuab microalloying (ntxiv vanadium, titanium thiab lwm yam khoom) thiab tswj kev dov thiab tswj cov txheej txheem txias. Hauv kev ua haujlwm ntawm cov tshuab engineering, qhov tuab ntawm lub caj npab crane ua los ntawm Q960 kub-kuav los xij tuaj yeem txo qis dua 6 hli, thiab lub peev xwm thauj khoom tau nce 3 zaug, uas txhawb nqa kev txhim kho qhov sib dua ntawm cov khoom siv xws li excavators thiab cranes.

Kev Ntsuas Tshwj Xeeb: SPHC thiab SAPH340
SPHC yog ib yam khoom zoo tshaj plaws ntawm cov hlau kub dov uas tsis muaj carbon ntau. Los ntawm kev ua kom zoo dua cov txheej txheem dov kom tswj tau qhov loj ntawm cov noob, qhov ntev ncav cuag ntau dua 30%. Hauv kev lag luam khoom siv hauv tsev, SPHC cov kauj dov kub siv los tsim cov tsev compressor tub yees. Nws cov kev ua tau zoo kos duab tob ua kom ntseeg tau tias tus nqi tsim nyog ntawm cov qauv nkhaus nyuaj tshaj 98%. Xyoo 2024, kev siv SPHC cov kauj dov kub hauv kev lag luam khoom siv hauv tsev yuav nce 15% txhua xyoo mus txog 3.2 lab tons.
Ua ib lub tsheb hlau, SAPH340 ua tiav qhov sib npaug ntawm lub zog thiab kev tawv los ntawm kev ntxiv 0.15% -0.25% carbon thiab kab boron. Hauv kev tsim cov roj teeb tsheb tshiab, SAPH340 cov kauj kub dov tuaj yeem tiv taus cov khoom thauj ntau dua 500MPa thiab ua tau raws li qhov yuav tsum tau ua ntawm cov txheej txheem vuam. Xyoo 2023, qhov sib piv ntawm cov kauj kub dov ntawm hom no siv hauv cov tsheb tshiab hauv tsev tau txog 70% ntawm cov khoom siv roj teeb.

Qauv	Lub Zog Tawm (MPa)	Kev ntev (%)	Cov Xwm Txheej Ib Txwm Muaj Rau Daim Ntawv Thov
Q235B	≥235	≥26	Cov qauv tsev, cov tshuab dav dav
Q345B	≥345	≥21	Cov choj, cov hlab ntsha siab
SPHC	≥275	≥30	Cov khoom siv hauv tsev, cov khoom siv hauv tsheb
Q960	≥960	≥12	Cov tshuab engineering, cov khoom siv high-end