Dab tsi yog lub hardness ntawm 440C stainless hlau?

Muaj peb feem ntau siv cov qauv: 440A, 440B, 440C, thiab 440F (yooj yim rau txheej txheem).
Dab tsi yog lub hardness ntawm 440C stainless hlau?
440C Stainless hlau yog lub high-carbon chromium chromium stainless hlau nrog cov ntsiab lus carbon nrog ntawm 95% thiab 20% thiab cov ntsiab lus chromium ntawm 16% rau 18%. Nws muaj cov zoo corrosion tsis kam, hardness thiab hnav tsis kam, thiab yog cov hlau loj ntawm cov hlau stainless.
AISI 400C yog lub siab-carbon chromium steel tsim los muab cov hlau stainless nrog ntau dua hardness. Tom qab kev kho cua sov, ntaus 440C mus txog qhov nyuaj tshaj plaws ntawm txhua tus hlau tsis muaj zog (txog 6HRC). Cov hlau no tsuas yog siv rau cov kabmob sib txawv, suav nrog cov pob kabmob, thiab yuav tsum tau txiav txim siab rau koob li qub thiab pob xyuas li qub.
440C High-infub-zog tej kev txiav cov hlau, nrog cov ntsiab lus carbon ntau dua, thiab lub hardness tuaj yeem ncav cuag 58HRC, uas yog ntawm cov tawv tawv stainless. Ib qho piv txwv ntxiv piv txwv yog "chais plaub hau paj".

Dab tsi yog qhov nyuaj ntawm 440C stainless hlau tom qab kev kho cua sov?
444 {{0 C stainless hlau yog lub high-carbon, siab-chromium martensitic steel cov ntsiab lus ntawm lub 17%, thiab ib anneal tsawg heev ntawm 40 degrees. Thaum siv los ua cov cuab yeej thiab cov kabmob rau kev kho cua sov, lub harc {}, thiab yog tias muaj kev kho cryogenically, lub hardness tuaj yeem ncav cuag HRC60.
Tom qab kev kho cua sov, 440C stainless hlau muaj lub hardness heev, feem ntau mus txog 60-6 hrc. Qhov nce hauv hardness yog feem ntau vim yog theem kev hloov pauv thiab cov khoom siv ua kom zoo thaum lub sijhawm kho kom sov.
440C stainless hlau tuaj yeem daws anealed, quenched thiab tempered. Qhov kev daws anealing kub yog 850-900 degree, qhov ntsuas kub quench, thiab kub degree, thiab qhov npau taws kub}}} degree. Lub hardness ntawm 440C stainless hlau tom qab quenching tuaj yeem ncav cuag hrc 58-60, nrog cov khoom tiv thaiv corrosion.