Cov phaj hlau uas tiv taus hnav muaj cov phaj hlau uas tsis muaj carbon ntau thiab cov txheej hlau uas tiv taus hnav, nrog rau cov txheej hlau uas tiv taus hnav feem ntau muaj li ntawm 1/3 txog 1/2 ntawm tag nrho cov tuab. Thaum lub sijhawm ua haujlwm, cov khoom siv hauv paus muab cov khoom siv dav dav xws li lub zog, kev tawv, thiab kev ywj pheej los tiv taus cov zog sab nraud, thaum cov txheej hlau uas tiv taus hnav muab kev tiv taus hnav uas tsim rau cov xwm txheej ua haujlwm tshwj xeeb.
Cov txheej txheem tiv taus kev sib xyaw ua ke ntawm cov hlau thiab cov khoom siv hauv paus yog sib txuas ua ke los ntawm hlau. Siv cov khoom siv tshwj xeeb thiab cov txheej txheem vuam tsis siv neeg, cov hlau sib xyaw ua ke uas muaj zog thiab tiv thaiv tus kheej tau vuam sib npaug rau cov khoom siv hauv paus. Cov txheej txheem sib xyaw ua ke tuaj yeem yog ib, ob, lossis ntau txheej. Vim muaj ntau yam sib txawv ntawm cov hlau sib xyaw ua ke, cov kab nrib pleb sib npaug tshwm sim thaum lub sijhawm lamination, ib qho cim ntawm cov hlau phaj tiv taus kev sib xyaw.
Cov txheej txheem tiv taus hnav ntawm cov hlau alloy feem ntau yog ua los ntawm chromium alloy, nrog rau lwm cov khoom sib xyaw xws li manganese, molybdenum, niobium, thiab nickel ntxiv. Cov carbides hauv cov qauv metallographic yog fibrous, nrog rau cov fibers taw qhia perpendicular rau qhov chaw. Lub carbide microhardness tuaj yeem ncav cuag tshaj HV 1700-2000, thiab qhov nyuaj ntawm qhov chaw tuaj yeem ncav cuag HRC 58-62. Alloy carbides ruaj khov heev ntawm qhov kub siab, tswj tau qhov nyuaj siab thiab kev tiv thaiv oxidation zoo heev, tso cai rau kev ua haujlwm tag nrho hauv qhov kub txog li 500 ° C.
Cov txheej uas tiv taus hnav tuaj yeem tshwm sim hauv cov qauv nqaim (2.5-3.5mm) lossis dav (8-12mm), nrog rau cov qauv nkhaus (S thiab W). Feem ntau yog ua los ntawm cov hlau chromium, cov hlau no kuj muaj manganese, molybdenum, niobium, nickel, thiab boron. Cov carbides raug faib ua cov qauv fibrous hauv cov qauv metallographic, nrog rau cov fibers khiav perpendicular rau qhov chaw. Nrog cov ntsiab lus carbide ntawm 40-60%, qhov microhardness tuaj yeem ncav cuag tshaj HV1700, thiab qhov nyuaj ntawm qhov chaw tuaj yeem ncav cuag HRC58-62. Cov hlau phaj uas tiv taus hnav feem ntau yog muab faib ua peb pawg: lub hom phiaj dav dav, tiv taus kev cuam tshuam thiab tiv taus kub siab. Tag nrho cov tuab ntawm cov hlau phaj uas tiv taus hnav tuaj yeem me me li 5.5 (2.5 + 3) hli thiab tuab li 30 (15 + 15) hli. Cov hlau phaj uas tsis hnav tau tuaj yeem dov rau hauv cov kav dej uas tsis hnav tau nrog qhov tsawg kawg nkaus ntawm DN200, thiab tuaj yeem ua tiav rau hauv cov luj tshib uas tsis hnav tau, cov tees uas tsis hnav tau thiab cov reducers uas tsis hnav tau.
Lub sijhawm tshaj tawm: Cuaj hlis-24-2025