Kev sib raug zoo ntawm qhov tob ntawm cov txheej Hardened ntawm Rail Surface thiab hnav Resistance Life
Vim li cas thiaj yuav tsum tau txoj kev tsheb ciav hlau quenching txheej qhov tob tswj ntawm 8-12mm?Qhov tob sib npaug ntawm qhov hnav tsis kam thiab cov tub ntxhais toughness . 8-12mm ua kom zoo hnav tsis kam thaum ua kom cov tub ntxhais tawv txaus los tiv thaiv kev cuam tshuam. Qhov tob tob tshaj 12mm ua rau kom brittleness thiab txaus ntshai chipping. Qhov tob tsis txaus tsawg dua 8 hli hnav tawm sai thiab ua rau lub neej ua haujlwm luv. Yog li 8-12mm yog qhov zoo tshaj plaws rau lub zog, toughness thiab durability.
Yuav ua li cas yog lub quenching txheej yog nyias dua 8 hli?
Cov khaubncaws sab nraud povtseg siv sai sai, nthuav tawm cov tub ntxhais mos thiab ua kom nrawm nrawm. Nws ua rau hnav tsis sib xws, nce sab hnav, corrugation thiab spalling. Kev pabcuam lub neej luv luv los ntawm ntau dua 30%. Txoj kev tsheb ciav hlau tsis zoo ua rau lub log tsis zoo- kev tsheb ciav hlau sib cuag thiab ua rau cov tsheb ciav hlau puas. Nws tseem ua kom luv lub sijhawm txij nkawm thiab ua rau muaj kev ua haujlwm ntau ntxiv.
Dab tsi yog qhov txawv ntawm cov qauv txheej txheem thiab GB rails hauv quenching tsim?
Cov txheej txheem txheej txheem sab nrauv rau siab - nrawm thiab hnyav- siv lub tsheb muaj cov txheej txheem 10-12mm quenching. GB zoo tib yam- cov kab nrawm feem ntau muaj 8-10mm rau kev lag luam. Cov txheej txheem sab nrauv feem ntau siv tag nrho -ntev quenching, thaum GB rails siv lub taub hau- tsuas yog quenching. Cov txheej txheem sab nrauv feem ntau kav ntev li 20% nyob rau hauv tib lub sijhawm hnav.
Dab tsi tshwm sim yog tias lub quenching txheej tsis zoo?
Uneven quenching ua rau tsis sib xws hnav thiab corrugation. Ib txheej nyias ua rau hnav sai thiab spalling. Ib txheej dhau -quenched ua rau brittleness, tawg thiab chipping. Tag nrho cov teeb meem no txo txoj kev smoothness thiab ua rau muaj kev cuam tshuam. Lawv ncaj qha hem khiav kev ruaj ntseg thiab kev nyab xeeb.
Yuav ua li cas txiav txim qhov quenching zoo ntawm qhov chaw?
Kev hnav khaub ncaws tsis muaj qhov muag muag qhia tau tias tsim nyog txheej. Cov chaw ci ntsa iab hauv zos lossis kev nyuaj siab qhia tias tsis txaus quenching. Portable hardness tester tuaj yeem txheeb xyuas qhov hardness ntawm HB320-380. Ib qho kev hloov pauv ntau dua 40HB txhais tau tias tsis sib xws, yuav tsum tau saib xyuas los yog hloov pauv.