Yuav ua li cas kuaj qhov sib xws ntawm hardness hauv H13 cov khoom

Cov txheej txheem tseem ceeb rau kev txiav txim siab qhov sib xws ntawm hardness nyob rau hauv H13 cov khoom yog ntsuas ob peb lub ntsiab lus ntawm lub workpiece nrog ib tug portable hardness tester, xam lub workpiece ntau thiab batch standard sib txawv, thiab ces siv metallographic tsom xam kom paub meej tias lub microstructure lub uniformity. Cov chaw mos thiab cov cheeb tsam nyuaj yog cov piv txwv ntawm qhov chaw tsis sib xws uas tuaj yeem txheeb xyuas tam sim siv txoj kev no.

 

1. Cov txheej txheem kuaj Hardness ntawm -site

Cov txheej txheem

Cov ntsiab lus tseem ceeb

Kev ncaj ncees

① Xaiv Cov Ntsiab Lus Ntsuas

Xaiv qhov chaw, ntug, nruab nrab, thiab thickness hloov chaw raws li peb mus rau tsib lub ntsiab lus tseem ceeb rau txhua daim.

Txhawm rau kom muaj kev sawv cev ntxiv, npog thaj chaw uas raug rau qhov tsis sib xws.

② Kev Kho Ntog

Cov roj stains thiab oxide txheej tuaj yeem raug tshem tawm los ntawm kev xuab zeb nrog cov ntawv xuab zeb kom txog thaum nws muaj qhov ci ci.

Txhawm rau tiv thaiv kev nyeem ntawv tsawg, xyuas kom qhov kev sojntsuam ua rau muaj kev sib cuag zoo.

③ Calibration ntawm Instruments

Ua ntej kev sim, xyuas kom tseeb tias qhov tsis raug yog tsawg dua ± 1 HRC los ntawm kev ntsuas ntawm tus qauv thaiv.

Tsis txhob muaj kev xav tsis thoob.

④ Kev ntsuas ntau -point

Ntawm txhua qhov chaw, coj peb qhov ntsuas, tom qab ntawd ntsuas qhov nruab nrab.

Indentations uas nyob ib sab yuav tsum tau sib cais los ntawm tsawg kawg yog 3 hli. Txhim kho repeatability thiab txo qhov yuam kev.

⑤ Kev Ntsuam Xyuas Cov Ntaub Ntawv

Txiav txim siab tus qauv sib txawv thiab ntau yam (tus nqi siab tshaj tawm tus nqi qis tshaj).

txheeb xyuas qhov sib xws ntawm hardness.

Daim Ntawv Pov Thawj: Batch nruab nrab ntawm 48 thiab 52 HRC, ib daim ntau <2 HRC.

 

2. Cov txheej txheem rau Kev Txiav Txim Siab

Qhov taw qhia

Kev ua tau zoo sib xws

Risk ntawm Inconsistency

Ntau yam ntawm Ib Cheeb Tsam Ib Leeg

≤2 HRC >3 HRC txhais tau tias tsis txaus tempering lossis tsis sib xws.

Nruab nrab ntawm Batches

48–52 HRC

Kev ceeb toom yog xav tau rau kev sib txawv ntau dua 1 HRC.

Standard Deviation rau Batches

Tsawg dua lossis sib npaug li 0.8 HRC

Cov txheej txheem dhau los ua tsis ruaj khov thaum tus nqi nce.

Piv txwv li, tsib lub ntsiab lus ntsuas ntawm H13 manifold muaj qhov hardness ntawm 50.1, 50.3, 49.8, 46.5, thiab 50.2 HRC, nrog ntau yam ntawm 3.7 HRC. Qhov no suav hais tias yog qhov chaw mos hauv cheeb tsam uas tuaj yeem tawg thaum siv.

 

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.

Kev Ntsuas Kub Kub Kub Kub: Tshawb xyuas seb puas muaj kev cuam tshuam lossis qhov hloov pauv hauv cheeb tsam thaum lub sijhawm tempering, thiab seb qhov ntsuas kub nyob li cas ntawm 550 thiab 600 degree.

Composition Pre- tshuaj xyuas thiab sib piv: Los ntawm kev tshem tawm qhov cuam tshuam ntawm cov khoom sib txawv, XRF yog siv los txheeb xyuas qhov sib xws ntawm Cr, Mo, thiab V cov ntsiab lus hauv cov khoom siv raw.

Lub hauv paus ntsiab lus kev nyab xeeb "Cov ntaub ntawv hais lus rau nws tus kheej, ntau- kev tshawb xyuas qhov ntev" lav tswj tau thiab traceable hardness sib xws.