Taw qhia rau Nitriding Thaum tshav kub kub kho txheej txheem

Nitriding yog cov txheej txheem kev kho cua sov uas suav nrog kev nkag mus ntawm cov ntsiab lus nitrogen rau hauv qhov chaw ntawm lub workpiece hauv nruab nrab uas muaj cov tshuaj chlorine, txhawm rau txhim kho qhov tawv tawv, hnav tsis kam, qaug zog, thiab liab ntawm lub workpiece. Nws yog hu ua anti hnav ammonia infiltration, abbreviated li nitriding (yav tas los hu ua nitriding).
Cov txheej txheem nitriding yog nqa tawm hauv qab theem hloov pauv kub ntawm cov hlau (450-600 degree), ua rau me me deformation ntawm lub workpiece. Tsis tas li ntawd, lub hardness ntawm nitriding txheej yog siab, thiab hnav tsis kam thiab qaug zog ua hauj lwm ntawm workpiece yog zoo. Yog li ntawd, cov txheej txheem no tau siv dav. Feem ntau siv nitriding steels yog 38 CrMoA1, 38 CrAl, thiab lwm yam. Vim yog kev txhim kho ntawm nitriding tshuab, qis thiab nruab nrab carbon alloy structural steel uas muaj cov ntsiab lus xws li Cr, Mo, V, Ti, A1 tuaj yeem nitrided.
Qhov tob ntawm txheej nitriding yog nyias nyias ({{0}}}2-0.7mm), uas feem ntau tuaj yeem suav tias yog ob txheej: txheej txheej txheej yog tsim los ntawm e theem thiab (e ntxiv rau Y ') theem, uas tsis yooj yim rau corrode thiab yog hu ua dawb ci txheej; Cov txheej sab hauv yog ib theem thiab (ib qho ntxiv Y ') theem (e - Fe2N thiab cov khoom siv ntawm cov hlau los yog nitrogen, Y' - Fe4N, a - cov kua nitrogen hauv cov hlau) nrog cov xim tsaus xim thiab cov khoom tawg heev ntawm nitrides ( AIN, VN, Mo2N, CrN). Cov txheej txheem nitriding siv sijhawm ntev, thiab feem ntau yuav siv sijhawm 20-80 teev kom tau txais 0.3-0.5mm nitriding txheej.
Vim lub fact tias siab hardness yuav tau nyob rau saum npoo ntawm lub workpiece tom qab nitriding, tsis tas yuav muaj kev kho mob. Txawm li cas los xij, ua ntej nitriding, nws yog ib qho tsim nyog yuav tsum ua tempering los yog normalizing kom ntseeg tau tias qhov kev ua tau zoo ntawm cov tub ntxhais, thiab qee zaum kev ntxhov siab yuav tsum tau ua kom sov. Cov cua txias tom qab nitriding yuav tsum tau ua raws li kev tiv thaiv me me ntawm NH3 kom tsis txhob oxidation ntawm lub workpiece.
Tom qab nitriding, qhov tawv tawv ntawm HV {{0}} tuaj yeem tau, nrog kev hnav tsis kam. Qhov siab tawv no tuaj yeem khaws cia txog li 500 degree (ntev ntev), thiab mus txog 6O0 degree (lub sijhawm luv), qhov kev txwv tsis pub thauj khoom tuaj yeem nce 30 feem pua ​​​​rau 300 feem pua, thiab kev tiv thaiv corrosion kuj tau txhim kho.