Y20 Dawb Txiav Hlau Bar

Cov txheej txheem tsim khoom ntawm Y20 steel bar feem ntau suav nrog cov kauj ruam hauv qab no:

 

Raw khoom npaj:

Xaiv cov khoom siv them nqi: Xaiv cov khoom siv raw uas ua tau raws li cov qauv, xws li hlau ore, coke, thiab cov hlau seem. Qhov zoo thiab tshuaj muaj pes tsawg leeg ntawm cov ntaub ntawv raw yog qhov tseem ceeb rau kev ua haujlwm ntawm cov hlau tom ntej. Lawv yuav tsum tau soj ntsuam nruj me ntsis thiab tshuaj xyuas kom ntseeg tau tias cov ntsiab lus ntawm impurity cov ntsiab lus xws li sulfur thiab phosphorus nyob rau hauv qhov kev teev tseg, thiab cov ntsiab lus ntawm cov ntsiab lus tseem ceeb xws li carbon, silicon, thiab manganese ua tau raws li qhov xav tau ntawm Y20 steel.

Kev suav nyiaj: Muab xam qhov feem ntawm ntau yam raw khoom kom raug raws li lub hom phiaj muaj pes tsawg leeg ntawm Y20 steel. Qhov tseeb ntawm lub nra ncaj qha cuam tshuam rau cov tshuaj lom neeg ntawm cov hlau molten thiab kev ua haujlwm ntawm qhov kawg steel bar.

Melting:

Blast furnace melting los yog hluav taws xob rauv melting: Ntxiv cov ntaub ntawv raw khoom npaj rau hauv qhov cub tawg lossis hluav taws xob rauv rau melting. Blast furnace melting siv qhov kub siab uas tsim los ntawm coke combustion los txo cov hlau ore rau hauv cov hlau molten thiab ntxiv ib qho tsim nyog ntawm cov khoom seem hlau los kho qhov muaj pes tsawg leeg. Hluav taws xob rauv melting melts raw cov ntaub ntawv xws li seem hlau los ntawm hluav taws xob lub zog. Thaum lub sij hawm melting txheej txheem, tsis xws li melting kub, lub sij hawm, thiab cua yuav tsum tau nruj me ntsis tswj los xyuas kom meej qhov zoo ntawm cov hlau molten.

Kev kho kom zoo: Ua kom cov hlau molten tom qab melting kom tshem tawm impurities thiab gases thiab txhim kho cov purity ntawm cov hlau molten. Cov txheej txheem refining muaj xws li lub tshuab nqus tsev refining thiab argon tshuab refining. Thaum lub sij hawm refining txheej txheem, tus nqi ntxiv ntawm refining agents thiab refining lub sij hawm yuav tsum tau precisely tswj kom lub refining nyhuv.

Ingot casting:

Kev npaj pwm: Xaiv ib qho pwm tsim nyog. Cov khoom siv thiab cov qauv ntawm cov pwm yuav tsum muaj peev xwm tiv taus qhov kub thiab txias ntawm cov hlau molten thiab xyuas kom meej cov duab thiab qhov tseeb ntawm qhov ingot. Cov pwm yuav tsum tau preheated los tiv thaiv cov kab nrib pleb thiab lwm yam tsis xws luag nyob rau hauv lub ingot vim yog kub ntau sib txawv thaum lub molten hlau yog poured.

Ncuav: Muab cov hlau ua kom zoo zoo rau hauv lub preheated ingot pwm rau casting. Thaum lub sij hawm pouring txheej txheem, tus nqi ntws thiab pouring kub ntawm cov hlau molten yuav tsum tau tswj kom ntseeg tau tias cov hlau molten muaj peev xwm tusyees sau pwm thiab tsis txhob muaj xws li shrinkage kab noj hniav thiab porosity.

Txias: Tom qab pouring, cia lub ingot txias lawm nyob rau hauv pwm los yog siv ib tug tsim nyog txoj kev txias. Tus nqi cua txias muaj ib qho tseem ceeb cuam tshuam rau lub microstructure thiab cov khoom ntawm lub ingot thiab yuav tsum tau tswj raws li cov yam ntxwv thiab cov kev cai ntawm qib steel.

Rolling:

Kub dov: Ua kom sov lub ingot mus rau qhov ntsuas kub uas tsim nyog (feem ntau siab dua 1000 degree) thiab tom qab ntawd yob nws los ntawm cov yob ntawm lub tshuab dov. Kub dov tuaj yeem rhuav tshem cov qauv casting ntawm lub ingot, kho cov nplej ntawm cov hlau, thiab tshem tawm cov kev ua haujlwm tsis zoo, ua rau cov qauv hlau ntom ntom thiab txhim kho nws cov khoom siv kho tshuab. Thaum lub sij hawm kub dov txheej txheem, tsis xws li dov kub, dov ceev, thiab txo yuav tsum tau tswj kom tau txais steel tuav nrog rau qhov yuav tsum tau qhov ntev thiab cov khoom.

Cold rolling (yeem): Rau qee qhov Y20 steel tuav nrog cov kev xav tau siab rau qhov raug thiab qhov zoo ntawm qhov chaw, yuav tsum tau ua kom txias txias. Txias dov yog txheej txheem dov nyob rau hauv chav tsev kub tom qab pickling lub kub dov steel bar kom tshem tawm cov oxide nplai. Txias dov tuaj yeem txhim kho qhov tseeb qhov tseeb thiab qhov zoo ntawm cov hlau bar tab sis yuav ua rau kom lub zog thiab hardness ntawm steel bar thiab txo nws cov toughness.

Kev kho cua sov:

Quenching: Thaum tshav kub kub lub yob Y20 steel bar rau ib qho kub thiab txias (feem ntau ntawm 800 degree thiab 900 degree) thiab ces sai sai rau hauv lub quenching nruab nrab xws li dej los yog roj kom txias. quenching tuaj yeem txhim kho hardness thiab lub zog ntawm steel bar tab sis kuj nce nws brittleness.

Tempering: Kub lub quenched steel bar los ntawm cua sov kom qis dua (feem ntau ntawm 500 degree thiab 600 degree) thiab ces cia nws rau ib lub sij hawm thiab maj mam txias. Tempering tuaj yeem txo qhov brittleness ntawm steel bar, txhim kho nws cov toughness thiab plasticity, thiab tseem tshem tawm cov kev ntxhov siab sab hauv tsim thaum quenching.

Ua tiav:

Txiav: Txiav lub tshav kub-kho steel bar rau hauv qhov ntev raws li cov neeg siv khoom xav tau. Thaum lub sij hawm txiav cov txheej txheem, kev txiav me me raug thiab txiav zoo yuav tsum tau ua kom ntseeg tau.

Kev kho saum npoo: Ntxuav, zom, thiab txhuam qhov saum npoo ntawm steel bar kom tshem tawm cov impurities xws li oxide nplai, roj stains, thiab xeb thiab txhim kho qhov zoo ntawm cov hlau bar.

Kev soj ntsuam zoo:

Tshuaj ntsuam xyuas muaj pes tsawg leeg: Txheeb xyuas cov tshuaj muaj pes tsawg leeg ntawm cov hlau molten thaum lub sijhawm tsim khoom thiab cov hlau tiav kom paub tseeb tias nws ua tau raws li tus qauv yuav tsum tau ua ntawm Y20 steel.

Kev ntsuam xyuas cov cuab yeej cuab tam: Ua cov kev ntsuam xyuas cov cuab yeej cuab tam xws li kev sim tensile, kev ntsuam xyuas hardness, thiab kev ntsuam xyuas cuam tshuam ntawm cov hlau tiav los xyuas seb nws cov khoom siv tshuab puas tau raws li cov qauv tsim.

Dimensional raug soj ntsuam: Siv cov cuab yeej ntsuas los tshuaj xyuas txoj kab uas hla, qhov ntev, qhov ncaj, thiab lwm yam tsis zoo ntawm cov hlau bar kom ntseeg tau tias nws qhov tseeb qhov tseeb raws li tus qauv yuav tsum tau ua.

Kev tshuaj xyuas qhov tshwm sim: Tshawb xyuas qhov zoo li ntawm steel bar los xyuas cov kab nrib pleb, suav nrog, qhov tsis xws luag, thiab lwm yam teeb meem.

 

Cov saum toj no yog cov txheej txheem ntau lawm ntawm Y20 steel bar. Cov txheej txheem tsim khoom tshwj xeeb yuav txawv nyob ntawm cov tuam txhab sib txawv, cov khoom siv, thiab cov khoom yuav tsum tau ua. Hauv cov txheej txheem tsim khoom tiag tiag, cov txheej txheem tsis sib xws ntawm txhua qhov txuas yuav tsum tau tswj hwm nruj kom ntseeg tau tias qhov zoo thiab ua haujlwm ntawm Y20 steel bar.

Cim npe nrov: y20 dawb txiav steel bar, Tuam Tshoj y20 dawb txiav steel bar lwm tus neeg, hoobkas