Koj puas tuaj yeem muab cov ntaub ntawv tshwj xeeb hardness rau H13 cov khoom tom qab tempering?

Tom qab tempering, cov ntaub ntawv hardness tshwj xeeb rau cov khoom siv H13 feem ntau yog khov kho ntawm 48 thiab 52 HRC. Lub hardness ntsuas yuav tau ua tib zoo tswj nyob rau hauv 49 ~ 51 HRC nrog ib zaug xwb - tej yam tsawg tshaj li los yog sib npaug rau 2 HRC siv ib tug standardized ob - tempering txheej txheem (xws li, 580℃× 2h × 2 lub sij hawm), exhibiting zoo batch sib xws.

 

1. Cov ntaub ntawv hardness ntsuas siv cov txheej txheem txheem

Tswj qhov kub thiab txias

Khaws Sijhawm

Tempering Lub Sijhawm

Hardness Ntsuas (HRC)

Cov xwm txheej rau cov ntawv thov

550 degree

Ob teev

ob zaug

50.5–52.0

Cov qauv siab rau kev hnav tsis kam thiab qhov tsim nyog los kuaj xyuas qhov brittleness

580 degree

Ob teev

ob zaug

49.0 rau 51.0

Cov txheej txheem tseem ceeb, kev ua haujlwm zoo tag nrho

600 degree

Ob teev

ob zaug

48.0-50.0 Nws

High toughness tshwm sim uas tso cai rau ib tug me me ntawm softening

Case Study los ntawm Wuhan Mould Factory: Lub hardness ntawm tsib qhov chaw ntsuas yog 49.8, 50.1, 50.3, 49.9, thiab 50.0 HRC tom qab tempering kub khiav nozzle ntawm 580℃rau ob teev thiab ob zaug, nrog qhov nruab nrab ntawm 49.9 HRC thiab 5 HRC. Muaj ntau tshaj 500,000 lub voj voog thoob plaws hauv lub neej ua haujlwm.

 

2. Cov ntsiab lus tseem ceeb cuam tshuam qhov sib xws ntawm cov ntaub ntawv Hardness

Kev tswj qhov kub thiab txias: Hardness variations ntawm 1 ~ 2 HRC yuav tshwm sim los ntawm qhov kub thiab txias sib txawv ntau dua ± 5 degree;

Tsis txaus Tempering Cycles: Nrog rau ib lub voj voog tempering, hardness nquag dhau 52 HRC, tsim kom muaj qhov tsis ruaj khov;

Workpiece Thickness thiab Tuav Lub Sijhawm: Txhawm rau kom muaj kev txaus siab txaus, xav tau 30 feeb ntxiv rau txhua 25 hli tuab;

Raw Material Composition: 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%).

Cov ntaub ntawv txawv txav: Tom qab tsuas yog peb hnub ntawm cov kab ntau lawm, ib pawg uas muaj qhov kub thiab txias qis dua 530℃tau tawg tawg thiab ntsuas qhov tawv ntawm 53.5 HRC.

 

3. Kev txheeb xyuas cov ntaub ntawv thiab kev tswj xyuas zoo

Multi-point testing: kom lav qhov ntau yam tsawg dua lossis sib npaug ntawm 2 HRC, peb mus rau tsib lub ntsiab lus raug tshuaj xyuas ib yam khoom (nruab nrab, ntug, tuab ciam);

Metallographic pov thawj: Dispersed carbides thiab homogeneous tempered martensite ua rau microstructure;

Cov ntaub ntawv txheej txheem: Cov ntaub ntawv ntsuas thiab qhov kub ntawm lub qhov cub hluav taws xob tau khaws cia rau kev taug qab.

Cov qauv kev nyab xeeb: "Cov ntaub ntawv hais rau nws tus kheej, cov txheej txheem tswj tau, thiab microstructure ntseeg tau." Txoj cai thiab kev cia siab ntawm cov ntaub ntawv hardness yog lav los ntawm kev sib xyaw ntawm peb lub tswv yim.