Nws siv sijhawm ntev npaum li cas rau cov khoom siv H13 kom ncav cuag qhov tawv tawv tom qab tempering?

Tom qab qhov thib ob tempering thiab txias rau chav tsev kub, cov khoom H13 ua tiav qhov hardness ruaj khov. Nyob ntawm qhov tuab ntawm lub workpiece thiab cov txheej txheem txias, tag nrho cov haujlwm feem ntau siv sijhawm plaub mus rau rau teev.

1. Cov ntsiab lus tseem ceeb Hardness Stabilization Sijhawm

Nqe lus piav qhia txog cov kev xav tau ntawm theem

Tempering tuav tsawg kawg yog ob teev, ua raws li cua txias rau hauv chav tsev kub (tsawg dua 50 degree) kom tsis txhob tawg, nws yuav tsum tau ua kom sai li sai tau tom qab quenching (pom zoo tsawg dua lossis sib npaug li 4 teev).

Txias rau hauv chav tsev kub tom qab lub sijhawm tempering thib ob ntawm tsawg kawg yog ob teev Kom lav tag nrho kev tso tawm ntawm qhov kev ntxhov siab, qhov no yuav tsum tau ua tom qab qhov pib tempering tau txias tag nrho.

Lub sij hawm rau Hardness Stabilization Tom qab lub thib ob tempering thiab txias rau ambient kub Thaum lub sij hawm no, lub hardness mus txog ib tug ruaj khov thiab cov kev hloov kho microstructure tiav lawm.

Tiag -Kev Piv Txwv Ntiaj Teb: Ib qho H13 kub khiav lub taub hau tau tempered ntawm 580℃× 2h × 2 zaug, tag nrho txog 5.5 teev ( cua sov thiab txias). Lub hardness tsuas yog txawv los ntawm 0.5 HRC tom qab txias, stabilizing ntawm 49.8 HRC.

2. Cov ntsiab lus cuam tshuam qhov ceev ntawm Hardness Stabilization

Ua haujlwm zoo Thickness: Txhawm rau lav qhov tsim nyog cov tub ntxhais tempering, lub sij hawm tuav yuav tsum tau nce 30 feeb rau txhua txhua 25 hli nce thickness.

Txias Rate: Txhawm rau tiv thaiv kev ntxhov siab rov qab los ntawm cov dej nrawm dhau los lossis cua txias, cua txias rau hauv chav tsev yog qhia.

Lub qhov cub kub kub tsis sib xws: Kom tsis txhob muaj qhov tsis txaus lossis ntau dhau ntawm kev kub ntxhov hauv qee thaj tsam, qhov sib txawv ntawm qhov kub ntawm qhov cub yuav tsum tsawg dua lossis sib npaug li ± 5 degree.

Raw Material Consistency: Cov ntsiab lus ntawm Cr, Mo, thiab V yuav tsum ua raws li cov lus qhia (Cr: 5.0% ~ 5.5%, Mo: 1.1% ~ 1.75%, V: 0.8% ~ 1.2%).

Note: To guaranty that the core performance satisfies requirements, it is advised to extend the entire cycle to 6–8 hours for thick-walled items (>75 mm).

3. Cas Hardness Stabilization tuaj yeem lees paub? Multi-point hardness testing: txhua daim yog sim ntawm peb mus rau tsib lub ntsiab lus, ua pov thawj qhov nruab nrab hardness ntawm 48–52 HRC thiab ntau yam tsawg dua los yog sib npaug rau 2 HRC;

Metallographic tsom xam: Tsis muaj untempered martensite nyob rau hauv lub microstructure, uas yog tsim los ntawm homogenous tempered martensite thiab tawg carbides;

Cov ntaub ntawv txheej txheem: Rau traceability, cov ntaub ntawv txias thiab lub cub tawg kub nkhaus rau ob qho tib si tempering yog khaws cia.

"Ob qhov txheej txheem tempering, ua kom txias, thiab cov ntaub ntawv pov thawj" yog tag nrho cov kev cai tseem ceeb ntawm kev nyab xeeb.