Kev sib tsoo yog ib txoj hauv kev zoo tshaj plaws ntawm kev txiav hlau hauv kev tsim khoom siv tshuab. Nws kuj yog siv dav hauv kev lag luam bearing. Cov kabmob uas tau raug quenched los ntawm kev kho cua sov yuav muaj cov kab nrib pleb reticular los yog cov kab nrib pleb tsis tu ncua thaum lub sij hawm sib tsoo. Cov kab nrib pleb me me hu ua kev sib tsoo cov kab nrib pleb, uas tsis tsuas yog cuam tshuam rau cov tsos ntawm cov kabmob, tab sis tseem ceeb tshaj, cuam tshuam ncaj qha rau qhov zoo ntawm cov kabmob. Kab lus no qhia cov yam ntxwv thiab ua raubearing sib tsoocov kab nrib pleb, nrog rau cov kev tiv thaiv zoo sib xws.
1. Cov yam ntxwv ntawm cov kabmob sib tsoo tawg
Sib tsoo cov kab nrib pleb yog pom tseeb txawv ntawm cov kab nrib pleb dav dav. Sib tsoo cov kab nrib pleb tsuas yog tshwm sim ntawm qhov sib tsoo, thiab qhov tob yog qhov ntiav thiab qhov pib zoo ib yam. Cov sib tsoo sib tsoo tawg yog perpendicular mus rau los yog ze rau cov kab sib txuas ua ke perpendicular mus rau kev sib tsoo cov kev taw qhia, thiab tsis tu ncua txheej txheej strips. Qhov no yog thawj hom tawg. Nws yog kwv yees li 0.03-0.15ram, thiab cov kab nrib pleb yog pom tseeb tom qab acid corrosion, uas yog qhov thib ob hom tawg.
2. Ua rau cov kabmob sib tsoo tawg
Cov txheej txheem ntawm cov kabmob sib tsoo tawg yog tshwm sim los ntawm kev sib tsoo kub, thiab cov kabmob ntawm qhov chaw kub tuaj yeem ncav cuag 800-1000 degree lossis siab dua thaum sib tsoo. Cov qauv ntawm quenched steel yog martensite thiab ib tug npaum li cas ntawm retained austenite, uas yog nyob rau hauv ib tug nthuav lub xeev (tsis tempered). Kev nthuav dav thiab kev cog lus ntawm martensite nce nrog qhov nce ntawm cov ntsiab lus carbon hauv cov hlau, yog li nws yog qhov tseem ceeb tshwj xeeb los tsim kev sib tsoo cov kab nrib pleb ntawm cov kabmob steel. Cov austenite khaws cia hauv cov hlau quenched yog decomposed nyob rau hauv lub zog ntawm kev sib tsoo kub thaum sib tsoo, thiab maj mam hloov mus rau hauv martensite. Qhov tshiab martensite no yog concentrated nyob rau saum npoo ntawm ib feem, ua rau lub zos expansion ntawm bearing nto, ua rau lub nto kev nyuaj siab ntawm qhov chaw ua rau lub concentration ntawm kev sib tsoo kev nyuaj siab, thiab nruam sib tsoo yuav accelerate lub tiam ntawm nto sib tsoo tawg; Tsis tas li ntawd, tus tshiab martensite yog qhov loj, thiab nws yog ib qho yooj yim los ua kom cov txheej txheem ntawm kev sib tsoo tawg thaum sib tsoo.
Ntawm qhov tod tes, thaum sib tsoo qhov chaw ntawm lub tshuab sib tsoo, nws yog ob qho tib si siab thiab nro ntawm cov khoom, uas txhawb cov tiam ntawm kev sib tsoo tawg. Yog tias qhov txias txias tsis txaus thaum sib tsoo, cov cua sov tsim tawm thaum sib tsoo yog txaus los rov ua kom cov txheej nyias nyias ntawm qhov sib tsoo, thiab tom qab ntawd quench nws mus rau hauv quenched martensite dua, yog li ua rau muaj kev ntxhov siab ntxiv ntawm txheej txheej. Ua ke nrog cov cua sov tsim los ntawm kev sib tsoo, qhov kub ntawm cov kabmob saum npoo nce thiab txias heev, thiab qhov superposition ntawm cov txheej txheem kev ntxhov siab thiab thermal stress yuav ua rau kev sib tsoo tawg ntawm qhov sib tsoo.
3. Kev ntsuas los tiv thaiv kev sib tsoo tawg
Los ntawm kev txheeb xyuas saum toj no, peb paub tias lub hauv paus ua rau kev sib tsoo tawg yog tias lub martensite thaum lub sij hawm quenching yog nyob rau hauv ib lub xeev ntawm expansion, thiab muaj kev ntxhov siab. Txhawm rau txo thiab tshem tawm cov kev ntxhov siab zoo li no, kev ntxhov siab nyem tempering, uas yog, quenching, yuav tsum tau ua. Tom qab tempering, lub sij hawm squanding yuav tsum ntau tshaj 4 teev. Raws li lub sijhawm tempering nce, qhov muaj peev xwm ntawm kev sib tsoo tawg tau qis. Tsis tas li ntawd, cov kabmob yuav tawg thaum nws tau kub ceev txog li 100 degree thiab tom qab ntawd txias sai heev. Txhawm rau tiv thaiv cov kab mob khaub thuas, cov khoom yuav tsum tau tempered ntawm li 150-200 degree . Yog tias cov kabmob txuas ntxiv mus txog 300 degree, qhov saum npoo yuav thim rov qab thiab tawg yuav tshwm sim. Txhawm rau tiv thaiv cov kab nrib pleb, cov kabmob yuav tsum tau tempered ntawm li 300 degree. Nws yog tsim nyog sau cia tias tempering lub bearings ntawm ib ncig ntawm 300 degree yuav txo nws hardness, yog li nws tsis haum rau siv. Ib zaug ntxiv, kev sib tsoo cov kab nrib pleb tseem tshwm sim tom qab ib qho tempering, uas tuaj yeem nqa tawm rau theem nrab tempering lossis kev kho kev laus, uas zoo heev.
Kev sib tsoo cov kab nrib pleb yog tshwm sim los ntawm kev sib tsoo kub, yog li txo kev sib tsoo kub yog tus yuam sij rau kev daws kev sib tsoo tawg. Feem ntau, txoj kev sib tsoo ntub dej yog siv, tab sis txawm li cas los xij lub coolant txhaj, lub coolant tsis tuaj yeem ncav cuag qhov sib tsoo hauv lub sijhawm thaum sib tsoo, yog li qhov sib tsoo kub ntawm qhov sib tsoo tsis tuaj yeem txo. Lub coolant tsuas tuaj yeem ua rau qhov sib tsoo ntawm lub log sib tsoo thiab cov khoom yuav txias tam sim tom qab sib tsoo, thiab cov dej txias tuaj yeem tua qhov sib tsoo tib lub sijhawm. Yog li ntawd, kev nce tus nqi ntawm cov coolant siv yog ib qho ntawm cov kev ntsuas tseem ceeb los txo qhov sib tsoo kub hauv qhov sib tsoo kom ntau li ntau tau. Yog tias siv txoj kev sib tsoo qhuav, qhov sib tsoo pub tus nqi me me, uas tuaj yeem txo qhov sib tsoo tawg. Txawm li cas los xij, cov txiaj ntsig ntawm txoj kev no tsis yog qhov tseem ceeb, thiab nws yog plua plav thiab cuam tshuam rau qhov chaw ua haujlwm, yog li nws tsis tsim nyog los txais yuav.
Siv lub log sib tsoo nrog softer hardness thiab coarser xuab zeb nplej rau kev sib tsoo, uas tuaj yeem txo qhov sib tsoo kub. Txawm li cas los xij, coarser hais yuav cuam tshuam qhov roughness ntawm qhov chaw. Rau qhov chaw uas yuav tsum tau muaj qhov roughness siab, txoj kev no tsis tuaj yeem siv, yog li nws yuav raug txwv. Nws muab faib ua ntxhib thiab zoo sib tsoo. Rau kev sib tsoo ntxhib, lub log sib tsoo mos nrog coarser hais yog siv rau kev sib tsoo, uas yooj yim rau kev sib tsoo muaj zog thiab txhim kho kev ua haujlwm. Tom qab ntawd, lub log sib tsoo zoo dua yog siv rau kev sib tsoo zoo, thiab kev sib tsoo pub tus nqi me me. Nws yog ib txoj hauv kev zoo tshaj plaws los siv ob txheej rau kev sib tsoo thiab kev sib tsoo zoo.
Nws tseem yog ib txoj hauv kev zoo los txo cov kev sib tsoo los ntawm kev xaiv cov sib tsoo log abrasives nrog kev ua haujlwm zoo ntawm tus kheej, tshem tawm cov khib nyiab ntawm qhov sib tsoo lub sij hawm, txo qhov sib tsoo pub tus nqi, nce cov sij hawm sib tsoo, thiab txo. qhov ceev ntawm lub rooj.
Kev sib hloov ceev ntawm lub log sib tsoo thiab qhov chaw kuj yog ib qho tseem ceeb cuam tshuam. Qhov loj ntawm kev sib hloov khiav ntawm lub log sib tsoo thiab qhov loj ntawm qhov txav ntawm qhov chaw yog qhov ua rau kev sib tsoo tawg. Txhim kho qhov kev sib hloov qhov tseeb ntawm kev sib tsoo lub log thiab qhov chaw hauv lub sijhawm kom tshem tawm ntau yam uas ua rau kev sib tsoo tawg kom ntau li ntau tau.
4. Qee txoj hauv kev los tiv thaiv kev sib tsoo ntawm qhov chaw ntawm cov kabmob steel
Hauv cov txheej txheem sib tsoo, txhawm rau tiv thaiv qhov tshwm sim ntawm kev sib tsoo cov kab nrib pleb ntawm cov kabmob steel, cov txheej txheem tseem ceeb yog:
① Txo kev sib tsoo cua sov los daws kev sib tsoo tawg. tus
② Nws muab faib ua ntxhib sib tsoo thiab zoo sib tsoo. Rau kev sib tsoo ntxhib, mos sib tsoo log nrog coarser hais yog siv rau kev sib tsoo. tus
③ Xaiv cov sib tsoo log abrasives nrog kev ua haujlwm zoo ntawm tus kheej, tshem tawm cov khib nyiab ntawm qhov chaw sib tsoo hauv lub sijhawm, txo cov kev sib tsoo pub, nce cov sij hawm sib tsoo, thiab txo qhov ceev ntawm lub rooj. tus
④ Txhim kho qhov kev sib hloov qhov tseeb ntawm kev sib tsoo lub log thiab qhov chaw hauv lub sijhawm kom tshem tawm qhov tshwm sim ntawm kev sib tsoo tawg kom ntau li ntau tau.
