Cov yam ntxwv ntawm Cov Hlau Manhole Npog

1. Kev ua kom muaj zog zoo:Tus nqi cuam tshuam ntawm cov hlau carbon nruab nrab yog qhov zoo heev, ntau dua 10 npaug ntawm cov hlau grey cam khwb cia.

2. Kev tiv thaiv xeb muaj zog: Hauv kev sim xeb dej tsuag, qhov xeb hauv 90 hnub tsuas yog 1/40 ntawm cov kav hlau thiab 1/10 ntawm cov kav hlau grey. Lub neej ua haujlwm yog ob npaug ntawm cov kav hlau grey thiab tsib npaug ntawm cov kav hlau ib txwm.

3. Zoo plasticity: Elongation ≥ 7/100, zoo ib yam li cov hlau carbon siab, thaum lub elongation ntawm cov khoom siv hlau grey cam khwb cia yog xoom.

4. Lub zog siab: Lub zog tensile ó b yog ≥ 420MPa, thiab lub zog tawm los yog ≥ 300MPa, uas yog tib yam li cov hlau carbon qis thiab peb zaug ntawm cov khoom siv hlau grey.
Lub zog ntawm hlau nplaum sib npaug li cov hlau cam khwb cia. Hlau zas muaj lub zog siab tsawg kawg yog 40k, thaum hlau cam khwb cia muaj lub zog tso zis tsuas yog 36k. Hauv feem ntau ntawm cov ntawv thov hauv nroog, xws li dej, dej ntsev, pa dej, thiab lwm yam, kev tiv thaiv corrosion thiab oxidation ntawm hlau zas ntau dua li cov hlau cam khwb cia. Cov chaw siv tseem ceeb yog: txoj kev hauv nroog, txoj kev loj, kev sib txuas lus, hluav taws xob, kev txuag dej, zej zog, tsev kawm ntawv, thiab ntau lub tiaj ua si.

5. Kev tiv thaiv tub sab thiab kev ruaj ntseg zoo dua:
Lub zog tensile thiab lub zog siab ntawm cov hlau ductile qhov npog tweezers zoo ib yam li hlau, yog li lawv hu ua hlau cam khwb cia. Piv nrog cov hlau grey cam khwb cia ib txwm muaj, nws qhov ntev elongation tau zoo dua, nws cov tawv zoo, thiab nws tsis yooj yim tawg. Nws muaj kev ua tau zoo dua li qub tiv thaiv kev tub sab nyiag. cov hlau cam khwb cia manhole npog, thiab nws qhov kev ua tau zoo tag nrho zoo dua li qub Lub qhov dej hlau cam khwb cia npog.