Q235 Q345 H Beam Steel

1, Cov yam ntxwv sib txawv.

Q235 elemental ntsiab lus A, B, C, D cov ntsiab lus sulfur hauv kev txiav txim qis; A thiab B muaj cov ntsiab lus phosphorus tib yam, C muaj cov ntsiab lus phosphorus siab tshaj plaws thib ob, D muaj cov ntsiab lus phosphorus tsawg tshaj plaws.

Txoj kev deoxidation cim:

F qhia tias boiling steel.

b qhia tias semi-sedated steel.

Z qhia tau hais tias cov hlau sedimented.

TZ qhia tias tshwj xeeb sedation steel.

Sedation steel tej zaum yuav tsis raug cim cim, uas yog, Z thiab TZ tsis tuaj yeem cim. Piv txwv li, Q235-AF qhia tias qib A boiling steel.

Tshwj xeeb lub hom phiaj carbon steel, xws li choj hlau, marine steel, thiab lwm yam, yeej siv cov carbon structural steel, tab sis nyob rau hauv cov hlau tooj ntawm qhov kawg ntawm cov ntawv ntxiv qhia txog kev siv.

Q345: Feem ntau siv nruab nrab carbon tempered structural steel. Cov hlau txias plasticity feem ntau, annealing, annealing tshaj qhov tempering kom zoo dua me ntsis, nrog lub zog ntau dua thiab zoo dua machinability, tom qab kev kho cua sov tsim nyog tuaj yeem tau txais tom qab qee qib ntawm toughness, plasticity thiab hnav tsis kam, cov khoom siv yooj yim.

Q345A, B, C, D, E tag nrho muaj Nb Tsawg dua lossis sib npaug rau 0.07, V Less dua lossis sib npaug rau 0.15, Ti Less dua lossis sib npaug 0.20, Cr Tsawg dua lossis sib npaug rau 0.30, Ni Less dua lossis sib npaug rau 0.012, Mo Less dua lossis sib npaug 0.10

Normalizing tuaj yeem txhim kho qhov kev ua haujlwm ntawm hardness tsawg dua 160HBS dawb paug. Cov hlau yog tempered, nws cov cuab yeej siv tau zoo los ua kom zoo dua lwm qhov nruab nrab carbon structural steel, tab sis steel hardenability yog tsawg, qhov tseem ceeb quenching txoj kab uas hla hauv dej yog 12 ~ 17mm, dej quenching nyiam ntawm kev tawg. Thaum txoj kab uas hla ntau dua 80mm, tom qab tempering lossis normalizing, nws cov khoom siv kho tshuab zoo sib xws, rau cov pwm nruab nrab thiab me me tom qab kev kho cua sov tuaj yeem tau txais lub zog ntau dua thiab tawv, thiab qhov loj, nws tsim nyog rau normalize cov kev kho mob, yog li cov hlau no. feem ntau yog siv nyob rau hauv lub xeev ntawm tempering los yog normalizing.

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