H13 steel, feem ntau yog siv los ua kub forging tuag, kub extrusion tuag thiab txhuas alloy tuag casting tuag, yog ib qho ntawm feem ntau siv kub ua hauj lwm tuag hlau nyob rau hauv tsev thiab txawv teb chaws. Nyob rau hauv lub xeev cov kev pab cuam, cov pwm yog raug rau muaj zog omnidirectional cuam tshuam load ntawm kub siab, feem ntau vim tsis txaus lub zog thiab toughness ntawm cov hlau, tshwj xeeb tshaj yog rau sab toughness tsis txaus, uas ua rau cov kab noj hniav ntug los yog lub zos vau, tawg thiab thaum ntxov. ua tsis tiav.
Cov txheej txheem smelting feem ntau ntawm H13 steel hauv Suav teb yog hluav taws xob rauv smelting + electroslag remelting thiab hluav taws xob rauv smelting + nqus refining. Electroslag smelting plays lub luag haujlwm tseem ceeb hauv kev tswj kev huv thiab microstructure uniformity ntawm H13 steel, thiab yog ib qho tseem ceeb txuas hauv kev tsim cov hlau zoo H13. Hais txog kev hais lus, tus nqi smelting ntawm lub cub hluav taws xob tsawg, thiab cov txheej txheem ua kom zoo xws li LF + VD tuaj yeem tsim H13 steel nrog cov ntsiab lus S thiab P qis (tsawg dua lossis sib npaug rau 0.003 %S, Tsawg dua lossis sib npaug li 0.015%P). Kev xyaum tsim khoom hauv tsev tau ua pov thawj tias qhov kev hloov pauv ntawm H13 steel uas tsim los ntawm lub tshuab hluav taws xob smelting yog tsawg, thiab nws tsis tuaj yeem ua tau raws li tus qauv ntawm NADCA#207-2003 "North American Die Casting Association H13 microstructure rating Chart". Qee qhov tshwj xeeb steel mills txawv teb chaws tuaj yeem tsim H13 steel nrog siab transverse toughness siv hluav taws xob rauv smelting. Yog li ntawd, nws yog ib qho tsim nyog los ua ib qho kev sib piv ntawm H13 steel smelted los ntawm electroslag thiab hluav taws xob rauv, tab sis muaj ob peb tsab ntawv ceeb toom nyob rau hauv Suav teb.
Lub microstructure thiab cov khoom ntawm H13 hluav taws xob rauv hlau thiab electroslag hlau tau muab piv thiab kawm. Qhov xaus yog tias qhov ceev thiab purity ntawm H13 hluav taws xob rauv hlau yog qis dua li ntawm cov hlau electroslag vim muaj ntau txoj kev smelting. Lub annealing banded segregation yog qhov hnyav thiab cov qauv annealing tsis sib xws. Tom qab quenching thiab tempering, tsis muaj kev hloov pauv hauv ntau cov kua carbide-tawm cov tebchaw. Nyob rau hauv qhov kev ntsuam xyuas, qhov tawg yog ib qho yooj yim tshwm sim nyob rau hauv qhov chaw uas cov saw hlau ua kua carbide-tawm accumulates, thiab cov kab txaij transverse tshwm nyob rau ntawm lub pob txha, uas ua rau tsis tshua muaj toughness.
