Kev kho nitriding ua li cas thiaj txhim kho qhov hnav tsis kam ntawm cov saw hlau?

Kev kho nitriding ua li cas thiaj txhim kho qhov hnav tsis kam ntawm cov saw hlau?

1. Kev Taw Qhia

Hauv kev lag luam niaj hnub no, cov saw hlau yog ib qho tseem ceeb ntawm kev sib kis thiab siv dav hauv ntau yam khoom siv kho tshuab. Qhov zoo ntawm lawv cov kev ua tau zoo yog ncaj qha cuam tshuam rau kev ua haujlwm zoo thiab lub neej ua haujlwm ntawm cov khoom siv. Kev hnav tsis kam yog ib qho ntawm cov cim qhia kev ua tau zoo ntawmcov saw hlau, thiab kev kho nitriding, ua ib qho thev naus laus zis ua kom lub ntsej muag muaj zog, tuaj yeem txhim kho qhov kev tiv thaiv kev hnav ntawm cov saw hlau.

2. Lub hauv paus ntsiab lus ntawm kev kho nitriding
Kev kho nitriding yog ib qho txheej txheem kho cua sov uas tso cai rau cov atoms nitrogen nkag mus rau hauv qhov chaw ntawm qhov kub thiab txias hauv ib qho chaw tshwj xeeb los tsim ib txheej nitride siab. Cov txheej txheem no feem ntau yog ua tiav ntawm qhov kub ntawm 500-540 ℃ thiab kav ntev li 35-65 teev. Qhov tob ntawm txheej nitriding feem ntau yog ntiav, piv txwv li, qhov tob ntawm txheej nitriding ntawm chromium-molybdenum-aluminium hlau tsuas yog 0.3-0.65 hli. Qhov nyuaj ntawm qhov chaw ntawm workpiece tom qab kev kho nitriding tuaj yeem txhim kho tau zoo rau 1100-1200HV (sib npaug rau 67-72HRC).

3. Cov txheej txheem nitriding
Cov txheej txheem nitriding feem ntau suav nrog cov kauj ruam hauv qab no:
Cua sov: Cua sov cov saw hlau rau qhov kub nitriding, feem ntau ntawm 500-540 ℃.
Kev rwb thaiv tsev: Tom qab ncav cuag qhov kub nitriding, khaws lub sijhawm rwb thaiv tsev kom cov nitrogen atoms tuaj yeem nkag mus rau hauv qhov chaw ntawm cov khoom ua haujlwm.
Txias: Tom qab ua tiav qhov nitriding, maj mam txias cov workpiece kom tsis txhob muaj kev ntxhov siab sab hauv.
Thaum lub sijhawm ua nitriding, feem ntau siv cov roj nruab nrab uas muaj nitrogen, xws li ammonia, los ua cov nitrogen atoms. Ammonia decomposes ntawm qhov kub siab los tsim cov nitrogen atoms, uas yuav nkag mus rau hauv qhov chaw ntawm cov khoom ua haujlwm los tsim ib txheej nitride. Tsis tas li ntawd, txhawm rau txhim kho cov nyhuv nitriding, qee cov khoom sib xyaw xws li txhuas, titanium, vanadium, tungsten, molybdenum, chromium, thiab lwm yam ntxiv rau hauv cov hlau. Cov ntsiab lus no tuaj yeem tsim cov tshuaj ruaj khov nrog nitrogen, txhim kho qhov nyuaj thiab hnav tsis kam ntawm txheej nitrided.

4. Lub tshuab ua kom cov saw hlau tsis kam hnav zoo dua los ntawm kev ua kom cov hlau tsis kam hnav zoo dua.
(I) Kev txhim kho qhov nyuaj ntawm qhov chaw
Tom qab nitriding, ib txheej nitride uas muaj zog heev tau tsim rau ntawm qhov chaw ntawm cov saw hlau. Cov txheej nitride no tuaj yeem tiv taus kev hnav ntawm cov khoom sab nraud thiab txo cov khawb ntawm qhov chaw thiab qhov tob ntawm kev hnav. Piv txwv li, qhov nyuaj ntawm qhov chaw ntawm cov saw hlau uas tau nitrided tuaj yeem ncav cuag 1100-1200HV, uas siab dua qhov nyuaj ntawm qhov chaw ntawm cov saw hlau uas tsis tau kho.
(II) Kev txhim kho ntawm qhov chaw microstructure
Kev kho nitriding tuaj yeem tsim cov khoom me me nitride rau ntawm qhov chaw ntawm cov saw hlau. Cov khoom me me no tau faib sib npaug hauv lub matrix, uas tuaj yeem txhim kho qhov hnav tsis kam thiab kev qaug zog tsis kam. Tsis tas li ntawd, kev tsim cov txheej nitriding kuj tseem tuaj yeem txhim kho qhov microstructure ntawm cov saw hlau, txo qhov tsis zoo thiab tawg ntawm qhov chaw, thiab yog li txhim kho kev ua tau zoo ntawm cov saw hlau.
(III) Kev txhim kho ntawm kev tiv thaiv kev qaug zog
Kev kho nitriding tsis yog tsuas yog txhim kho qhov tawv thiab hnav tsis kam ntawm qhov chaw ntawm cov saw hlau xwb, tab sis kuj tseem txhim kho nws qhov kev tiv thaiv kev qaug zog. Qhov no yog vim tias cov txheej nitriding tuaj yeem ua rau muaj kev ntxhov siab thiab txo qhov kev ntxhov siab, yog li txo qhov tshwm sim ntawm kev tawg qaug zog thiab nthuav dav. Piv txwv li, hauv kev tshawb fawb txog cov saw hlau maus taus thiab cov saw hlau kis, nws tau pom tias qhov tawv ntawm qhov chaw thiab kev tiv thaiv kev qaug zog ntawm cov hlau carbon nruab nrab uas tau quenched thiab tempered steel pin shaft kho nrog carbonitriding tau zoo dua.
(IV) Txhim kho kev tiv thaiv xeb
Tom qab kev kho nitriding, ib txheej nitride tuab tuab tau tsim rau ntawm qhov chaw ntawm cov saw hlau. Cov txheej nitride no tuaj yeem tiv thaiv kev yaig los ntawm cov xov xwm corrosive sab nraud thiab txhim kho kev tiv thaiv corrosion ntawm cov saw hlau. Qhov no tseem ceeb heev rau cov saw hlau ua haujlwm hauv qhov chaw nyuaj, thiab tuaj yeem ua rau lawv lub neej ua haujlwm ntev dua.

5. Daim ntawv thov kev kho nitriding hauv kev tsim cov saw hlau
(Kuv) Txhim kho lub neej ua haujlwm ntawm cov saw hlau
Kev kho nitriding tuaj yeem txhim kho qhov kev tiv thaiv kev hnav thiab kev qaug zog ntawm cov saw hlau, yog li ntawd ntev lawv lub neej kev pabcuam. Piv txwv li, tom qab kev kho nitriding, lub neej kev pabcuam ntawm cov saw hlau conveyor muaj zog thiab tiv taus kev hnav siab tau ntau dua ob npaug. Qhov no yog vim tias cov saw hlau tom qab kev kho nitriding tuaj yeem tiv taus qhov tsim ntawm kev hnav thiab qaug zog tawg thaum lub sijhawm ua haujlwm, yog li txo qhov zaus ntawm kev saib xyuas thiab hloov pauv.
(II) Txhim kho qhov kev ntseeg tau ntawm cov saw hlau
Cov saw hlau tom qab kev kho nitriding muaj qhov nyuaj ntawm qhov chaw thiab kev qaug zog ntau dua, uas ua rau nws txhim khu kev qha dua thaum lub sijhawm ua haujlwm. Txawm tias thaum ua haujlwm nyob rau hauv qhov hnyav siab thiab qhov chaw ib puag ncig hnyav, cov saw hlau tom qab kev kho nitriding tuaj yeem tswj tau qhov ua tau zoo thiab txo qhov tshwm sim ntawm kev ua tsis tiav. Qhov no tseem ceeb heev rau qee cov khoom siv uas muaj qhov yuav tsum tau muaj kev ntseeg siab siab, thiab tuaj yeem txhim kho kev ua haujlwm ntawm cov khoom siv tau zoo.
(III) Txo cov nqi kho ntawm cov saw hlau
Vim tias kev kho nitriding tuaj yeem txhim kho lub neej kev pabcuam thiab kev ntseeg siab ntawm cov saw hlau, nws tuaj yeem txo nws cov nqi txij nkawm. Kev txo qhov zaus ntawm kev txij nkawm thiab hloov pauv tsis tsuas yog txuag lub sijhawm thiab cov nqi zog ua haujlwm, tab sis kuj txo qhov kev poob nyiaj txiag los ntawm cov khoom siv tsis ua haujlwm. Qhov no muaj qhov tseem ceeb ntawm kev lag luam rau cov lag luam.

6. Cov txiaj ntsig thiab qhov tsis zoo ntawm kev kho nitriding
(Kuv) Cov txiaj ntsig
Txhim kho qhov hnav tsis kam: Kev kho nitriding tuaj yeem txhim kho qhov tawv thiab hnav tsis kam ntawm qhov chaw ntawm cov saw hlau, yog li ua rau nws lub neej ntev dua.
Txhim kho kev tiv thaiv kev qaug zog: Cov txheej nitriding tuaj yeem ua rau muaj kev ntxhov siab thiab txo qhov kev ntxhov siab, yog li txo qhov tshwm sim ntawm kev tsim thiab nthuav dav ntawm kev qaug zog.
Txhim kho kev tiv thaiv xeb: Ib txheej nitride ntom ntom tau tsim rau ntawm qhov chaw ntawm cov saw hlau tom qab kev kho nitriding, uas tuaj yeem tiv thaiv kev yaig los ntawm cov xov xwm corrosive sab nraud.
Cov txheej txheem laus: Kev kho nitriding yog ib qho thev naus laus zis txhim kho qhov chaw uas muaj kev siv dav hauv kev lag luam.
(II) Qhov Tsis Zoo
Lub sijhawm ua haujlwm ntev: Kev kho nitriding feem ntau siv sijhawm ntev, xws li 35-65 teev, uas yuav ua rau cov nqi tsim khoom nce ntxiv.
Qee qhov cuam tshuam rau qhov loj ntawm workpiece: Kev kho nitriding yuav ua rau muaj kev hloov pauv me ntsis ntawm qhov loj ntawm workpiece, uas yuav tsum tau saib xyuas tshwj xeeb hauv qee daim ntawv thov nrog qhov yuav tsum tau ua kom raug qhov ntev.
Cov kev xav tau siab rau cov khoom siv: Kev kho nitriding xav tau cov khoom siv tshwj xeeb thiab kev tswj hwm cov txheej txheem nruj, uas yuav ua rau kev nqis peev ntawm cov khoom siv thiab cov nqi khiav lag luam nce ntxiv.

7. Xaus Lus
Ua ib qho thev naus laus zis ua kom lub ntsej muag muaj zog, kev kho nitriding tuaj yeem txhim kho qhov kev tiv thaiv kev hnav thiab kev qaug zog ntawm cov saw hlau, yog li ua rau lawv lub neej ua haujlwm ntev dua thiab txhim kho kev ntseeg tau. Txawm hais tias kev kho nitriding muaj qee qhov tsis zoo, xws li lub sijhawm ua haujlwm ntev thiab cov khoom siv siab, nws cov txiaj ntsig ntau dua li qhov tsis zoo. Kev siv kev kho nitriding hauv kev tsim cov saw hlau tsis tsuas yog txhim kho kev ua tau zoo thiab zoo ntawm cov khoom, tab sis kuj txo cov nqi txij nkawm, coj cov txiaj ntsig kev lag luam tseem ceeb rau lub tuam txhab. Yog li ntawd, daim ntawv thov kev kho nitriding hauv kev tsim cov saw hlau dav dav, thiab nws tsim nyog rau kev tshawb fawb tob thiab kev txhawb nqa los ntawm cov tuam txhab thiab cov kws tshawb fawb.

8. Kev taw qhia txog kev loj hlob yav tom ntej
Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, kev siv tshuab kho nitriding kuj tseem niaj hnub tsim kho thiab tsim kho tshiab. Yav tom ntej, kev siv tshuab kho nitriding yuav tsim kho raws li cov hauv qab no:
Txhim kho kev kho mob kom zoo dua: Los ntawm kev ua kom zoo dua cov txheej txheem thiab cov cuab yeej siv thev naus laus zis, ua kom lub sijhawm kho nitriding luv dua thiab txhim kho kev ua haujlwm ntau lawm.
Txo cov nqi kho mob: Los ntawm kev txhim kho cov khoom siv thiab cov txheej txheem, txo cov peev txheej khoom siv thiab cov nqi khiav lag luam ntawm kev kho nitriding.
Txhim kho qhov zoo ntawm kev kho mob: Los ntawm kev tswj hwm cov kev ntsuas hauv cov txheej txheem nitriding kom raug, txhim kho qhov zoo thiab kev sib xws ntawm cov txheej nitriding.
Nthuav dav thaj chaw siv: Siv cov thev naus laus zis kho nitriding rau ntau hom cov saw hlau thiab cov khoom lag luam cuam tshuam kom nthuav dav nws cov ntawv thov.
Hauv ntej, kev siv cov thev naus laus zis kho nitriding hauv kev tsim cov saw hlau muaj qhov tseem ceeb thiab kev cia siab dav dav. Los ntawm kev tshawb fawb thiab kev tsim kho tshiab tas mus li, peb ntseeg tias cov thev naus laus zis kho nitriding yuav ua rau muaj kev pab ntau dua rau kev txhim kho kev lag luam saw hlau.