Dab tsi yog qhov tsis xws luag tom qab tempering H13 khoom?

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 los ntawm qhov kub siab tshaj plaws los yog 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 (>100 MPa)

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 tau pom qhov nyuaj ntawm kev tawg ntawm 46-53 HRC vim yog lub qhov cub kub kub tswj kev ua haujlwm tsis zoo, 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: Txiav txim siab cov khoom sib txawv thiab cov qauv sib txawv los ntawm ntau yam - taw tes ntsuas nrog lub ntsuas qhov tawv tawv;

Metallographic Analysis: Txiav txim seb lub microstructure yog homogenous tempered martensite + tawg carbides los ntawm saib nws nyob rau hauv ib tug 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 lub hauv paus ntsiab lus kev nyab xeeb tshaj plaws.

 

3. Kev Tiv Thaiv thiab Tswj

Ua ob ntu ntawm tempering: Txhawm rau kom tso siab rau tag nrho, lub qhov cub yuav tsum cua txias rau chav sov tom qab 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 ntawv pov thawj, guaranteeing txhim khu kev qha txheej txheem tswj.