Raw Material Preparation thiab Precise Alloying
Cov ntsiab lus tseem ceeb: Raws li cov hlau- carbon foundation, alloying cov ntsiab lus xws li Cr, Mn, W, Mo, thiab V yog qhov sib npaug raws li lub hom phiaj steel qib cov qauv kev sib xyaw ua ke; cov pa roj carbon ntsiab lus rau cov kub kub- ua hauj lwm tuag steels yog tswj nyob rau hauv lub 0.3% -0.6%.
Kev Tswjhwm Upstream: Kev tshuaj xyuas tshuaj thiab kev kuaj lub cev yog ua rau txhua yam khoom siv raw; cov ntaub ntawv uas muaj impurity qib siab tshaj qhov txwv yog tsis lees paub los xyuas kom meej muaj pes tsawg leeg ntawm qhov chaw.
Melting thiab Purification
Mainstream Melting Route: Cov txheej txheem ua ke ntawm "converter / hluav taws xob arc rauv (EAF) thawj melting → ladle furnace (LF) refining → RH nqus degassing" yog ua haujlwm. Noj H13 steel ua piv txwv, teeb meem impurities nyob rau hauv cov hlau molten yog txo qis los ntawm cov tswv yim xws li converter ob -slag operations thiab high-basicity slag refining.
Advanced Purification: Rau siab -kawg kub- ua hauj lwm tuag steels, ib kauj ruam electroslag remelting (ESR) ntxiv mus ntxiv tshem tawm cov uas tsis yog -hlau inclusions thiab ua tau ib tug huv microstructure, yog li no ho txhim kho toughness thiab thermal qaug zog kuj.
Casting thiab Nruam Casting Control
Cov haujlwm tseem ceeb: Cov hlau purified molten undergoes nruam nruam rau hauv cov paj loj nyob rau hauv nruj tswj qhov kub thiab txias. Cov txheej txheem txias me me yog siv los tiv thaiv cov kab nrib pleb hauv cov cam khwb cia, ua raws li kev hloov pauv tam sim ntawd mus rau lub qhov txias txias kom txias qeeb kom txo tau cov kev ntxhov siab sab hauv.
Kev Tswjhwm Zoo: Casting ceev thiab kub yog nruj me ntsis tswj thoob plaws hauv cov txheej txheem los tiv thaiv qhov tsis xws luag xws li roj porosity thiab inclusions, kom ntseeg tau ib tug uniform internal microstructure nyob rau hauv lub cam khwb cia blooms.
