High - Ceev Hlau: Ib qho cuab yeej ntse hauv kev lag luam niaj hnub
Nyob rau hauv cov teb ntawm cov txheej txheem kho txhua yam thiab tsim khoom, ib qho khoom siv sawv ntsug rau nws cov ntaub ntawv tshwj xeeb thiab}} kub} ceev steel (hss). Kuj tseem hu ua siab - Ceev tuam steel lossis "cov hlau dawb {5} - Cov Khoom Siv Tool, qhov kev ua haujlwm dawb ua si lub luag haujlwm tsis tseem ceeb hauv kev tsim khoom niaj hnub no.
Dab tsi yog siab - ceev steel?
High - Ceev Hlau yog lub siab ntawm cov ntsiab lus (w)}}}}}}}}}}}}} Qhov sib ntxiv ntawm cov ntsiab lus uas muab cov khoom siv hss, ua kom nws muaj zog thiab hnav tsis kam txiav thiab siab}} tej kev mob kub.
Tshuaj lom neeg tshuaj lom neeg thiab microstructure
Cov ntsiab lus carbon cov ntsiab lus ntawm siab - ceev steel feem ntau yog li ntawm 0.7%, nrog tag nrho cov khoom siv alloying rau 10% rau 25%. Qhov kev siab siab no -} Cov tshuaj muaj yees nyob rau hauv cov carbide feem ntau (xws li tungsten carbide, lossis vanadium carbide) embedded nyob rau hauv ib tug hlau matrix. Qhov no microstructure recants hss tshwj xeeb hardness, thiab liab - hardness (muaj peev xwm los khaws lub hardness (kub).
Cov khoom ntawm high - ceev hlau
Hardness siab: Tom qab kev kho cua sov kom zoo, hss tuaj yeem ua tiav qhov hnyav heev, ua rau nws muaj peev xwm txiav lwm cov ntaub ntawv.
Cov hnav zoo heev: Cov ntsiab lus carbide siab muab hss zoo saib cov hnav tsis kam, txuas cov cuab yeej siv tas li.
Zoo liab - hardness: HSS ua kom nws lub hardness (txog 600 degree), ua rau siab rau siab- ceev tej kev ua haujlwm.
High compressive zog: HSS tuaj yeem tiv taus lub siab zoo, ua rau nws zoo tagnrho rau hnyav {{}} txoj hmoo txiav tej yam.
HSS muaj cov txheej txheem zoo, nrog kev ua kom sib haum ntawm lub zog thiab tawv. Nws yog feem ntau siv los tsim cov complex phaj {1} {{}}}}} kub bearings thiab excove excusion pwm. Ntxiv rau hss tsim los ntawm melting txoj kev, hmoov metallururgy siab siab {6} ceev steel tawm hauv xyoo 1960. Nws tau txais txiaj ntsig zoo nyob rau hauv kev zam lub carbide segregation tshwm sim los ntawm melting cov khoom, uas tuaj yeem txo cov khoom siv me me thiab ua rau kev kho cua sov [1].
Raws li ib qho tseem ceeb Tool cov khoom siv, siab - ceev steel, nrog nws cov ntawv thov ceev, tau dhau los ua qhov tsis tseem ceeb ntawm kev tsim khoom niaj hnub no. Txawm hais tias yog rau precision machining lossis hnyav- Duttion txiav, hss muab kev lag luam txhim kho thiab cov khoom zoo.
