Muaj pes tsawg txoj kev kho cua sov siv rau cov kav hlau hauv Suav teb? Puas yog qhov kev kho cua sov zoo ib yam rau txhua lub kav hlau? Kev kho cua sov yog ib qho ntawm cov txheej txheem tseem ceeb hauv kev tsim cov yeeb nkab steel, uas ua lub luag haujlwm tseem ceeb hauv kev tshawb nrhiav cov khoom ntawm cov khoom siv hlau, txhim kho cov kev pab cuam lub neej ntawm cov kav hlau, thiab txhim kho lawv cov kev ua tau zoo.
Lub hom phiaj ntawm kev kho cua sov rau seamless steel kav yog:
(1) txhawm rau txhim kho cov khoom siv kho tshuab ntawm cov kav dej;
(2) Txhim kho cov yas ntawm cov hlau;
(3) Yuav kom tau txais ib lub koom haum muaj xwm txheej;
(4) Txhawm rau tshem tawm kev ntxhov siab tom qab txias deformation, thiab lwm yam.
Raws li cov kev cai ntawm ntau yam steel yeeb nkab qauv thiab cov kev cai sib txawv rau lub microstructure, cov khoom, thiab hardness ntawm cov kav hlau steel, cov txheej txheem kev kho cua sov ntawm cov kav hlau feem ntau tuaj yeem muab faib ua pawg hauv qab no:
(1) Annealing - ua tiav annealing, isothermal annealing, spheroidizing annealing;
(2) Normalization;
(3) Normalizing thiab tempering;
(4) quenching thiab tempering (quenching thiab tempering kho);
(5) Vim muaj kev daws teeb meem.
Qhov zoo ntawm steel yeeb nkab kev kho cua sov txheej txheem feem ntau yog nyob ntawm cov cua sov, rwb thaiv tsev, thiab cua txias.