Yuav ua li cas kuaj qhov hardness ntawm H13 khoom tom qab tempering?

Lub portable hardness tester yuav tsum tau siv los ntsuas qhov hardness ntawm H13 khoom ob peb zaug ntawm qhov chaw sib txawv ntawm workpiece tom qab tempering. Qhov no tau lees paub tias thaj chaw tseem ceeb tau them los ntawm cov ntaub ntawv, thiab kev txheeb xyuas ntau yam thiab cov qauv sib txawv yog siv los ntsuas qhov sib xws. Qhov no yog cov txheej txheem tseem ceeb rau kev lees paub qhov kev kho cua sov zoo.

 

1. Cov Qauv Txuj Ci rau Kev Ntsuas Hardness ntawm -Site

Cov txheej txheem

Cov ntsiab lus tseem ceeb

Kev ncaj ncees

① Xaiv Cov Ntsiab Lus Xeem

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

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

② Kev Kho Ntog

Txhawm rau tshem tawm cov oxide txheej los yog cov roj stains, maj mam xuab zeb cov ntsiab lus nrog cov ntawv xuab zeb.

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

③ Ntsuas Hardness

Siv lub portable Rockwell (HRC) lossis Leeb (HL) hardness tester hauv hom hloov dua siab tshiab.

Txhawm rau nce cov ntaub ntawv kev cia siab, ntsuas peb zaug ntawm txhua qhov chaw thiab suav qhov txiaj ntsig nruab nrab.

④ Kev khaws 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).

Tshawb xyuas seb qhov kev hloov pauv yog nyob rau hauv qhov kev tswj tau ntau yam.

Kev lees txais cov qauv: batch nruab nrab ruaj khov ntawm 48 thiab 52 HRC, ib thooj ntau yam tsawg dua lossis sib npaug rau 2 HRC.

 

2. Kev ntsuam xyuas thiab qhov tshwm sim rau qhov kev xeem

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 tej teeb meem uas yuav tsum tau saib.

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, ib lub lag luam tshuaj xyuas lub H13 kub khiav nozzle pom tias ib feem ntawm nws muaj ib lub zos hardness ntawm 46.8 HRC, nrog ib tug ntau yam ntawm 3.3 HRC, thaum seem yog 50.1 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;

Kev Ntsuas Kub Kub Kub Kub: Txiav txim siab seb puas muaj kev cuam tshuam lossis kev hloov pauv hauv cheeb tsam thaum lub sij hawm 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.