Dab tsi yog cov ntsiab lus tseem ceeb ntawm H13 cov khoom siv tempering nkhaus?

Qhov kub ntawm 550-600 degree, ob lub voj voog tempering, lub sijhawm tuav tsawg kawg yog ob teev, qhov pom zoo kub ntawm 580℃± 5 degree, thiab txias rau chav tsev kub yog cov yam ntxwv tseem ceeb ntawm H13 cov khoom tempering nkhaus. Ua ke, cov xwm txheej no tau lees paub qhov microstructure zoo ib yam, kev ua haujlwm zoo, thiab qhov nyuaj ntawm 48-52 HRC.

1. Cov txheej txheem tseem ceeb

Cov ntsiab lus tseem ceeb

Cov xwm txheej tshwj xeeb

Muaj nuj nqi

Tswj qhov kub thiab txias

550-600 degree; 580℃± 5℃tau qhia.

Qhov kub uas siab dhau ua rau dhau- tempering (hardness < 48 HRC), qhov kub uas qis dhau ua rau tsis txaus tempering (hardness> 52 HRC).

Qhov ntau ntawm temperings

Nws yuav tsum tau ua ob zaug.

Txhawm rau kom txo tau qhov kev ntxhov siab ntxiv, cia cov huab cua nyob rau hauv qhov kub thiab txias tom qab thawj tempering.

Khaws Sijhawm

Ntau dua lossis sib npaug li 2 teev txhua lub sijhawm; rau cov ntu tuab, ntxiv 30 feeb rau txhua 25 hli tuab.

Tsis txhob "mos sab hauv, tawv sab nraud" los ntawm kev ua kom cov tub ntxhais muaj tempered txaus.

Tshuab cua txias

Cia cov huab cua poob mus rau qhov kub thiab txias (tsawg dua 50 degree).

Tiv thaiv kom tsis txhob muaj microstructure stability los ntawm kev puas tsuaj los ntawm huab cua lossis dej txias.

 

2. Cov ntsiab lus tseem ceeb rau kev teeb tsa thiab txheeb xyuas qhov nkhaus

Kev Tau Txais Cov Ntaub Ntawv: Ua cov kev sim nrog tsawg kawg ntawm peb cov qauv rau ib pawg ntawm qhov kub ntawm 550 degree, 580 degree, thiab 600 degree, thiab xam qhov nruab nrab hardness tus nqi los ntawm ntau lub ntsiab lus;

Cov yam ntxwv zoo: Raws li qhov kub thiab txias nce, hardness nthuav tawm maj mam poob yam tsis muaj qhov rov qab, qhia txog cov txheej txheem microstructure stability;

Kev Ntsuas Metallographic: Yuav tsum tsis muaj qhov tsis muaj martensite lossis network carbides hauv microstructure, tsuas yog tempered martensite thiab tawg zoo carbides;

Txheej Txheem Archiving: Txhawm rau ua kom tiav kev tswj xyuas kev taug qab, txuag cov ntaub ntawv ntsuas thiab ntsuas kub kub nkhaus.

Nco tseg: Kev ntsuam xyuas ntawm cov txheej txheem hloov pauv yog tsim nyog yog tias qhov hardness ntau dua 2 HRC, vim qhov no qhia txog qhov kub thiab txias ntawm qhov cub lossis qhov cub tsis raug.

3. Tej yam tsis zoo thiab kev tiv thaiv

Manifestation ntawm Anomalies

Tej Yam Ua Tau

Qhov tshwm sim

Hardness ntau tshaj 52 HRC

Tsis tshua muaj kub (tsawg dua 550 degree) los yog tsis txaus cua sov tuav

Siab brittleness thiab thaum ntxov tawg susceptibility

Hardness <48 HRC

Elevated temperature (>600 degree) los yog ntev

Txo lub zog thiab pwm susceptibility rau vau

Qhov tseem ceeb variation nyob rau hauv hardness (ntau> 2 HRC)

Workpiece stacking los yog kub sib txawv nyob rau hauv lub cub tawg ntau tshaj ± 5 degree

Kev pabcuam lub neej raug cuam tshuam los ntawm kev ua haujlwm tsis zoo hauv zos.

"Qhov kub thiab txias, tsim nyog tus lej ntawm lub voj voog, lub sijhawm txaus, thiab khaws cov ntaub ntawv" yog plaub yam tseem ceeb ntawm kev nyab xeeb.