Dab tsi yog qhov ua tau zoo ntawm H13 cov khoom siv nrog lub hardness ntawm 48-52 HRC?

Txhawm rau kom ua tiav qhov sib npaug ntawm lub zog siab, qhov ua tau zoo heev, thiab qhov tshwj xeeb hnav tsis kam, H13 cov khoom ua tau zoo tshaj plaws thaum nws qhov tawv yog ntawm 48 thiab 52 HRC. Nws ua haujlwm zoo nrog cov pwm uas raug rau qhov kub thiab txias.

 

1. Kev ntsuas kev ua tau zoo tseem ceeb

Indicators of Performance

Kev ua tau zoo

Kev piav qhia

Hardness

48–52 HRC

Yog tias nws siab dhau, nws ua nkig; yog tias nws qis dhau, nws feem ntau yuav tawg. Qhov zoo tshaj plaws equilibrium muaj nyob rau hauv no ntau yam.

Toughness ntawm Impact

15-20 J / cm²

Fracture resistance has been much enhanced; >18 J / cm² yog qhov zoo heev.

Resistance rau Abrasion

kho tau zoo heev.

Lub matrix tau txais kev txhawb nqa los ntawm kev nplua, tawg ntho carbides, uas ua rau qeeb tus nqi hnav.

Lub neej ntawm Thermal Fatigue

ntau tshaj 30% ntev.

ncua kev tawg, tsis tu ncua microstructure, thiab ruaj khov expansion thaum lub sij hawm thermal cycling.

Kev Nyuaj Siab

Tsawg dua los yog sib npaug li 100 MPa

Kev ntxhov siab tsawg heev txo qis txoj hauv kev tawg thaum ua tiav thiab ua haujlwm.

Kev siv tswv yim: H13 kub khiav nozzles uas tau tempered ob zaug ntawm 580℃muaj ib tug lifespan ntawm ntau tshaj 500,000 cycles, ib tug zoo sib xws hardness ntawm 49.8 HRC, thiab ib tug tej yam toughness ntawm 17.3 J / cm².

 

2. Cov yam ntxwv ntawm Metallography

Matrix Structure: Fine carbides dispersed dav thiab uniform tempered martensite;

Tsis muaj qhov txawv txav: Tsis muaj carbide network, untempered martensite, lossis oxidation ntawm cov ciam teb nplej;

Cov qauv tsis sib xws: Ib qho "nyuaj saum npoo, mos sab hauv" yog zam los ntawm tsis muaj qhov sib txawv ntawm qhov sib txawv ntawm cov ntu tuab thiab nyias.

Txhawm rau lav qhov huv thiab zoo ib yam microstructure, nws raug nquahu kom coj mus kuaj yam tsawg 5% ntawm txhua pawg thiab tshuaj xyuas nws hauv qab 400 × lub tshuab ntsuas.

 

3. Kev ruaj ntseg ntawm cov txheej txheem thiab kev ua tau zoo

Ua ob ntu ntawm tempering: Txhawm rau kom txo tau qhov kev ntxhov siab, cov qauv yuav tsum tau cua txias rau chav sov tom qab thawj tempering;

Txhawm rau tswj qhov kub thiab txias, siv PID kub tswj qhov cub nrog lub qhov cub kub qhov sib txawv ntawm Tsawg dua lossis sib npaug li ± 5℃thiab qhov chaw ntawm 580℃± 5 degree;

Lub sij hawm tuav txaus: Ntau dua lossis sib npaug li 2 teev txhua lub sijhawm, ntxiv rau 30 feeb rau txhua 25 hli tuab ntawm cov khoom tuab;

Cov ntaub ntawv archiving: Rau traceability, txuag cov qhabnias xeem thiab cub kub nkhaus.

"Cov ntaub ntawv khaws cia, kev ntseeg siab ntawm lub koom haum, thiab kev ua raws li kev ua tau zoo" yog peb txoj hauv kev ruaj ntseg tshaj plaws.