Dab tsi yog qhov tsis xws luag tom qab tempering H13 khoom?
Tso lus
Tom qab tempering H13 cov ntaub ntawv, cov flaws muaj xws li tsis sib xws hardness, siab heev los yog tsawg hardness, microstructure coarsening, ntau dhau kev ntxhov siab, thiab decarburization nto. Cov kev tsis zoo no tuaj yeem ua rau muaj kev cuam tshuam loj rau pwm lub neej ntev thiab kev pabcuam kev ua haujlwm.
1. Thawj hom thiab ua rau muaj qhov tsis xws luag
Ib qho txhaum
Kev nthuav qhia tshwj xeeb
Qhov Tseem Ceeb
Hardness Variability (Ntau> 2 HRC)
tseem ceeb variations nyob rau hauv hardness thoob plaws ntau qhov chaw ntawm tib yam khoom, tsim kom muaj zog los yog mos cheeb tsam.
Cov cua txias tsis sib xws, qhov cub tsis sib xws, thiab qhov kub tsis sib xws
Tsawg Hardness (tsawg dua 48 HRC)
txo lub zog thiab hnav tsis kam, nrog rau tsis txaus tag nrho hardness.
dhau -tempering coj mus rau ib qho kev kub ntxhov siab dhau los lossis lub sijhawm tuav ntev heev.
High Hardness (>52 HRC)
siab brittleness thiab thaum ntxov cracking txaus ntshai.
tsis tiav tempering vim tsis txaus tuav lub sij hawm los yog tempering kub.
Microstructure Coarsening
coarse carbide agglomeration, matrix txiav, thiab toughness txo.
Secondary carbide nag lossis daus los ntawm qhov kub thiab txias heev los yog lub sij hawm ntev tempering.
High Residual Stress (>100MPa)
hlau txiav cracking, deformation thaum lub sij hawm machining, thiab ceev thermal qaug zog tawg propagation.
tempering ib zaug los yog txias sai heev.
Decarburization ntawm Nto
Txo hardness, hnav tsis kam, thiab cov ntsiab lus carbon saum npoo.
tsis huv saum npoo ua ntej tempering los yog tsis txaus tswj ntawm lub cub tawg ib puag ncig.
Tiag tiag- piv txwv hauv ntiaj teb: Ib pawg ntawm H13 pwm cores pom qhov sib txawv ntawm qhov nyuaj ntawm 46-53 HRC vim qhov kub ntawm lub cub tawg kub tswj tsis ua haujlwm, uas ua rau peb tawg qhov tshwm sim hauv ib lub lis piam ntawm kev ua haujlwm.
2. Cov txheej txheem rau kev txheeb xyuas qhov tsis raug thiab pov thawj
Kev Ntsuas Hardness: Kev txiav txim siab ntawm tus kheej cov khoom ntau thiab cov qauv sib txawv los ntawm ntau yam - taw tes ntsuas nrog lub ntsuas qhov tawv tawv;
Kev Ntsuas Metallographic: Kev txiav txim siab seb lub microstructure yog homogenous tempered martensite + tawg carbides los ntawm saib nws nyob rau hauv 400 × microscope;
X-ray diffraction (XRD) yog siv los txheeb xyuas qhov kev ntxhov siab nyob hauv, nrog tus qauv dhau ntawm Tsawg dua lossis sib npaug li 100 MPa;
Kev Tshawb Fawb Txog Kev Tshawb Fawb: XRF txheeb xyuas tias tsis muaj decarburization saum npoo (cov ntsiab lus C ib txwm muaj) thiab cov qauv no tau ua tiav rau Cr, Mo, V, thiab lwm yam.
Kev sib xyaw ua ke ntawm "cov ntaub ntawv pov thawj, microstructure txhim khu kev qha, cov txheej txheem tswj tau" yog txoj cai kev nyab xeeb tshaj plaws.
3. Kev Tiv Thaiv thiab Tswj
Ua ob ntu ntawm tempering: Txhawm rau kom tso siab tag nrho, lub qhov cub yuav tsum cua txias rau chav sov tom qab qhov pib tempering.
Kev tswj qhov kub thiab txias: xyuas kom tseeb tias qhov sib txawv ntawm qhov kub hauv lub cub tawg yog tsawg dua lossis sib npaug li ± 5℃los ntawm kev siv PID kub tswj qhov cub uas tau teeb tsa ntawm 580 degree.
Standardized furnace loading: Txhawm rau kom qhov sib xws ntawm thermal ncig, siv cov cuab yeej racks, tshem tawm cov stacking, thiab khaws qhov tsawg kawg ntawm 5 cm ntawm workpieces.
Cov ntaub ntawv txheej txheem: Txhawm rau kom ua tiav cov ntaub ntawv, sau cov ntaub ntawv tus neeg teb xov tooj, cov ntaub ntawv hardness, thiab kub nkhaus rau txhua qhov cub tawg.
Wuhan Heat Treatment Plant thiab Jingmo Technology yog cov neeg muab kev pabcuam; ob leeg muaj CQI-9 daim ntawv pov thawj, guaranteeing ntau txhim khu kev qha txheej txheem tswj.
