Cov txheej txheem kev kub khiav online thiab ua haujlwm txhim kho ntawm kev ntsia hlau
- Dab tsi yog qhov sib txawv ntawm "txau quenching" thiab "ntsees quenching" hauv kev kho mob online kub?
Spray quenching controls cooling speed with atomized water, offering uniform cooling and preventing surface cracks, suitable for high-carbon rails. With a cooling rate of 15 - 25℃/s, it produces fine pearlite, achieving a hardness of HB330 - 380. Immersion quenching has a faster rate (30 - 50℃/s), forming martensite on the surface, which increases hardness (HB >400) tab sis brittleness .}}}}}}} Lub Hoobkas railed tom qab 10% ntawm 60kg / m ntsia hlau tawg vim tsis muaj zog txias.
- Dab tsi yog qhov cuam tshuam ntawm tempering kub ntawm kev tsheb ciav hlau nruj?
Nruab nrab ntawm 450 - 600} degree, kev tsheb ciav hlau nce ntxiv nrog kub ntawm 450 qib kev pab cuam nyuaj ntawm 25J / CM²; Thaum 550 degree, kev ntxhov siab feem ntau yog tshem tawm, hloov cov qauv rau kev ua kom yooj yim dua - 550℃.
- Yuav ua li cas kev kho cua sov online ua kom muaj kev sib tw khiav ua haujlwm?
Ntau qib cua sov thiab cua txias ua tiav cov khoom siv hluav taws xob khiav nrawm dua li kev sib tw yog qhov sib txawv yog tias muaj kev sib cav sib ceg yog qhov kev sib tw kab nce zuj zus kev tsim nyog los ntawm 85% rau 98% tom qab txais cov kab ke no .
- Dab tsi yog qhov cuam tshuam ntawm "muaj kev ntxhov siab" hauv kev kho cua sov-kho rau ntawm lub neej pabcuam?
Residual stress includes compressive and tensile components. Moderate surface compressive stress (100 - 200MPa) extends fatigue life by countering tensile loads from trains. However, high tensile stress (>300mpa) accelerates tawg tawg propagation.} Cov kev sib tw ciav hlau tsis zoo vim yog 10 xyoo dhau los ntawm 10 xyoo .
- Dab tsi yog cov kev ua tau zoo yuav tsum ua rau cov kab ke ua kom sov hauv cov chav kawm sib txawv?
Cov kev tsheb nqaj hlau (tsawg dua los yog sib npaug rau 160km / h) 1} {} hardness thiab tsawg dua los yog sib npaug} 5 hli ib txwm hnav; high-ceev railways (ntau dua los yog sib npaug ntawm 2500mpa tenserness Kev kub ceev cov phiaj xwm Rail tau daws teeb meem los ntawm hloov cov kev hloov pauv kub-kho cov kev muag khoom kub nrog cov kev sib tw tshwj xeeb.