Dab tsi yog qhov hardness fluctuation qauv rau H13 khoom tom qab tempering?

Tom qab tempering, cov nram qab no hardness fluctuation yuav tsum tau siv rau H13 khoom: Ib tug workpiece nyob rau hauv tib batch yuav tsum muaj ib tug hardness ntau yam tsawg tshaj li los yog sib npaug rau 2 HRC, thiab batch qhov nruab nrab hardness yuav tsum nyob twj ywm ntawm 48 thiab 52 HRC. Yog tias qhov ntau yam no dhau lawm, muaj kev phom sij zoo thiab cov txheej txheem raug suav tias tsis muaj kev tswj hwm.

 

1. Kev lees txais cov txheej txheem rau hardness hloov pauv

Qhov taw qhia

Txais Cov Qauv

Kev ncaj ncees

Ntau yam ntawm Hardness rau ib qho workpiece

Tsawg dua lossis sib npaug li 2 HRC

qhov sib txawv loj tshaj plaws nyob rau hauv hardness ntawm ntau qhov chaw ntsuas ntawm tib lub workpiece, uas yuav qhia tau tias tsis sib xws microstructure los yog txias.

Tag nrho ntau yam ntawm batch hardness

48–52 HRC

Qhov no yuav tsum yog lub hom phiaj ntawm txhua qhov kev ntsuas workpiece. Kev ceeb toom yog qhov tsim nyog yog tias qhov sib txawv ntawm tus nqi nruab nrab yog ntau dua 1 HRC.

Kev sib haum xeeb hauv Batches

Tsawg dua lossis sib npaug li 1.5 HRC ntau yam

Qhov nruab nrab hardness fluctuation yuav tsum tsawg dua thaum ob peb batch yog tas li tsim, qhia cov txheej txheem stability.

Daim Ntawv Thov: Tom qab tempering H13 kub khiav nozzles, lub tuam txhab Wuhan tau txiav txim siab tias qhov nyuaj ntawm tsib qhov chaw ntsuas ib thooj yuav tsawg dua lossis sib npaug rau 1.8 HRC. Cov khoom lag luam uas tsis ua raws li cov qauv raug muab cais tawm sai sai rau kev kuaj xyuas ntxiv.

 

2. Kev phom sij thiab kev cuam tshuam ntawm kev hloov pauv ntau dhau2 HRC: Qhia txog qhov muaj nyob hauv thaj chaw mos lossis qhov chaw uas tsis raug tempered, uas yuav ua rau muaj kev ntxhov siab thaum lub sijhawm ua haujlwm thiab tej zaum yuav ntxov deformation lossis tawg;

<48 HRC: Shows insufficient strength and vulnerability to wear and collapse due to over-tempering or incomplete quenching;52 HRC: Shows excessive brittleness, high residual stress, inadequate tempering, and a markedly elevated risk of rapid fracture;

Kev tswj cov txheej txheem tsis ruaj khov yog qhia los ntawm cov khoom loj loj dispersion, uas yuav muaj kev cuam tshuam rau qhov sib xws ntawm pwm lub neej.

Case Study: Ib pawg ntawm H13 manifolds qhia hardness dispersion li ntawm 46 mus rau 53 HRC raws li qhov tshwm sim ntawm kev tswj qhov kub thiab txias hauv lub cub tawg. Tom qab peb hnub ntawm kev siv, ob daim tawg.

 

3. Cov kauj ruam tseem ceeb rau kev lav ris Uniform Hardness

Ua ob ntu ntawm tempering: Txhawm rau kom tsis txhob muaj kev ntxhov siab rov qab, txias rau qhov kub thiab txias tom qab thawj tempering;

Standardize lub cub tawg loading los ntawm kev ua kom workpieces tsawg kawg yog tsib centimeters sib nrug, tsis txhob stacking, thiab guarantees zoo ib yam li cua kub ncig;

Siv PID qhov kub thiab txias-tswj lub qhov cub: Khaws lub cub tawg tag nrho qhov kub thiab txias rau txhua lub cub tawg thiab ua kom qhov kub thiab txias sib txawv hauv lub cub tawg ntawm ± 5 degree;

Ua ntej- tshuaj xyuas cov ntaub ntawv raw: Txhawm rau tiv thaiv cov khoom hloov pauv los ntawm kev cuam tshuam cov tshuaj tiv thaiv tempering, siv XRF kom paub meej tias cov khoom sib xyaw Cr, Mo, thiab V raws li cov lus qhia tshwj xeeb.