Yuav ua li cas txhawm rau txheeb xyuas qhov sib txawv ntawm qhov sib txawv ntawm H13 cov khoom tom qab tempering?

Tom qab tempering, multi-point ntsuas siv lub portable hardness tester yog lub ntsiab siv los xyuas kom meej hardness fluctuations nyob rau hauv H13 cov ntaub ntawv. Batch cov ntaub ntawv txheeb xyuas kev txheeb xyuas yog siv los ntsuas qhov sib xws thiab homogeneity ntawm hardness faib. Cov txheej txheem no yog ceev, tsis yog - puas tsuaj, thiab tsim nyog rau batch tshuaj xyuas ntawm -site.

 

1. Tus txheej txheem txheem rau ntawm -Site Test

Cov txheej txheem

Cov ntsiab lus tseem ceeb

Kev ncaj ncees

① Xaiv thaj chaw xeem

Txhua qhov chaw ua haujlwm yuav tsum muaj peb mus rau tsib qhov ntsuas qhov ntsuas ntawm nws qhov chaw, npoo, nruab nrab, thiab cov pob qij txha tuab.

npog thaj tsam uas yooj yim rau kev ua kom txias tsis tu ncua.

② Kev Kho Ntog

Siv cov ntawv xuab zeb los maj mam xuab zeb rau qhov chaw sim.

tshem tawm cov roj me me los yog oxide txheej kom lav kev sib cuag zoo thiab tiv thaiv cov xwm txheej ntawm qhov cuam tshuam rau kev nyeem ntawv.

③ Ntsuas Hardness

Siv lub portable Rockwell (HRC) lossis Leeb (HL) hardness tester hauv hom hloov dua siab tshiab. Muab xam tus nqi nruab nrab tom qab ntsuas txhua qhov taw tes peb zaug.

txhim kho qhov tseeb ntawm cov ntaub ntawv.

④ Sau thiab sib piv cov ntaub ntawv

Nco ntsoov qhov hardness qhov tseem ceeb ntawm txhua qhov chaw, tom qab ntawd suav cov qauv sib txawv thiab ntau yam (tus nqi siab tshaj tawm tus nqi qis tshaj).

paub meej txog theem ntawm kev hloov pauv.

Cov txheej txheem lees txais suav nrog tus nqi nruab nrab ntawm 48 txog 52 HRC rau tag nrho cov khoom siv thiab qhov sib txawv ntawm qhov nyuaj ntawm tsawg dua lossis sib npaug rau 2 HRC rau ib qho hauv tib pawg.

 

2. Kev ntsuam xyuas qhov pheej hmoo thiab kev hloov pauv

Ntau yam ntawm Fluctuation

Kev txiav txim tshwm sim

Tswv yim

Tsawg dua los yog sib npaug rau 1 HRC

Zoo heev, txhim khu kev qha txheej txheem

Kev siv ncaj qha yog ua tau.

1-2 HRC

Ib txwm hloov pauv, txais tau

Txhawb kev saib xyuas cov txheej txheem

2-3 HRC

Muaj qee qhov kev pheej hmoo, uas yuav tsum tau tshawb fawb ntxiv.

Metallographic txoj kev tshawb fawb thiab kev ua piv txwv kom paub meej tias microstructure homogeneity3 HRC

Muaj qhov chaw tsis tsim nyog, qhov chaw mos, lossis qhov chaw tsis muaj zog.

Rework los yog pov tseg tag nrho cov batch

Piv txwv li, thaum lub chaw tsim tshuaj paus tau tshuaj xyuas ib pawg ntawm H13 manifolds, nws pom tias ib feem muaj lub zos hardness ntawm 46.5 HRC, thaum lwm qhov chaw muaj ib tug ntau ntawm 3.7 HRC thiab lub zos hardness ntawm 50.2 HRC. Kev tsis sib xws tau pom tias yog qhov ua rau qhov teeb meem ntawm thaj chaw mos.

 

3. Cov txheej txheem pov thawj ntxiv

Metallographic Sampling Analysis: Txhawm rau txheeb xyuas qhov muaj nyob ntawm qhov tsis muaj martensite, khaws cia austenite, lossis microstructure coarsening, cov qauv ntawm cov khoom ua haujlwm nrog qhov txawv txav yog npaj rau kev kuaj.

Tshawb xyuas qhov ntsuas kub ntawm lub cub tawg kom pom tias muaj qhov sib txawv ntawm qhov kub thiab txias los yog cuam tshuam thiab yog tias qhov kub thiab txias nyob li ntawm 550 txog 600℃thaum tempering.

Composition Pre-kev tshuaj xyuas thiab kev sib piv: Txhawm rau tshem tawm qhov cuam tshuam ntawm kev sib xyaw ua ke, XRF yog siv los txheeb xyuas qhov sib xws ntawm Cr, Mo, thiab V concentrations hauv cov khoom siv raw.

Lub hauv paus ntsiab lus ntawm kev nyab xeeb "Cov ntaub ntawv hais rau nws tus kheej, ntau-kev pov thawj qhov ntev" lav tias qhov sib txawv ntawm qhov tawv yuav raug taug qab thiab tswj tau.