Q1: Vim li cas cov sulfur (S) thiab phosphorus (P) cov ntsiab lus nruj tswj hwm hauv seamless yeeb nkab steel zoo li 20 #?
A:S thiab P yog suav tias yog impurities. Cov ntsiab lus S siab tuaj yeem ua rau "kub luv" (kub tawg thaum ua haujlwm kub), thaum siab P nce "txias brittleness." Cov qauv feem ntau txwv lawv tsawg dua lossis sib npaug li 0.035% txhua rau qib-5 kom ntseeg tau zoo ductility thiab toughness.
Q2: Lub luag haujlwm ntawm chromium (Cr) hauv qib zoo li 40Cr thiab 20CrMo yog dab tsi?
A:Chromium tsub kom hardenability (qhov tob ntawm hardening thaum lub sij hawm kho cua sov), txhim kho corrosion / oxidation kuj, thiab pab txhawb lub zog los ntawm cov khoom siv ntxiv zog. Qhov no ua rau cov qib no haum rau kev xav tau ntau yam khoom siv-4-5.
Q3: Yuav ua li cas ntxiv ntawm molybdenum (Mo) hauv 42CrMo thiab 15CrMoG txhim kho cov yeeb nkab ua haujlwm?
A:Molybdenum txhim kho lub zog ntawm qhov kub thiab txias, nce hardenability, thiab txhim khu kev tiv thaiv rau "temper embrittlement." Qhov no yog qhov tseem ceeb rau cov kav dej uas siv hauv siab -siab boilers (15CrMoG)-1 los yog high-stress automotive / mechanical Cheebtsam (42CrMo)-4-10.
Q4: Dab tsi yog cov tshuaj sib txawv rau cov ntsiab lus tseem ceeb hauv 35 # steel seamless kav?
A:Rau qib 35 #: Carbon (C): 0.32-0.39%, Silicon (Si): 0.17-0.37%, Manganese (Mn): 0.35-0.65%, nrog S thiab P Tsawg dua lossis sib npaug li 0.035%-5.
Q5: Vim li cas "cov hlau huv" yog qhov tseem ceeb rau kev tsim cov yeeb nkab seamless, tshwj xeeb tshaj yog rau cov qib alloy?
A:Kev txo qis tsis yog{0}}cov khoom siv hlau (oxides, sulfides) yog qhov tseem ceeb rau kev ua tiav cov suab zoo sab hauv, uas cuam tshuam ncaj qha rau lub neej qaug zog, tawv, thiab kev tsim kho. Qhov no yog ib qho tseem ceeb tshwj xeeb rau cov kav dej uas raug rau kev thauj khoom cyclic lossis kev sib sau hnyav.
