Dab tsi yog qhov laj thawj tshwj xeeb rau kev hloov pauv loj hauv hardness ntawm H13 cov khoom tom qab tempering?
Tso lus
Kev tswj qhov kub thiab txias tsis raug, kev ua haujlwm tsis raug ntawm qhov chaw ua haujlwm uas ua rau qhov tsis sib xws, qhov sib txawv ntawm cov khoom siv raw, thiab lub voj voog tsis txaus yog thawj qhov ua rau muaj qhov sib txawv tseem ceeb hauv hardness ntawm H13 cov khoom tom qab tempering. Tag nrho cov ntsiab lus no muaj kev cuam tshuam txog kev hloov pauv microstructure li cas.
1. Kev soj ntsuam ntawm Thawj Qhov Tseem Ceeb
Ua rau muaj feem cuam tshuam
Tsis sib xws lossis loj hloov pauv hauv Tempering Kub: Cov cheeb tsam hauv cheeb tsam yuav dhau mus dhau -tempering (hardness < 48 HRC) lossis tsis txaus tempering (hardness> 52 HRC) thaum qhov kub sib txawv hauv qhov cub yog> ± 5℃. Lub hardness hloov ntawm 1 ~ 2 HRC tuaj yeem tshwm sim rau txhua ± 10 degree.
Txoj Kev Ua Haujlwm Tsis Txaus Siab: Thaum cov khoom ua haujlwm tau muab tso ua ke los yog qhov sib nrug tsawg dua tsib centimeters sib nrug, cov cua kub ncig raug cuam tshuam, uas ua rau tsis sib xws hauv qhov "shielded area," tsim cov tawv tawv lossis muag muag.
Tsis txaus Tempering Cycles (Tsuas yog Ib qho): Thaum qhov kev ntxhov siab seem tsis tso tawm tag nrho, lub microstructure yuav tsis ruaj khov thiab muaj lub caij nyoog uas muaj kev ntxhov siab tuaj yeem rov qab los thaum ua haujlwm ntxiv lossis kev pabcuam, uas ua rau muaj kev sib faib tsis sib luag ntawm cov tawv tawv.
Variations nyob rau hauv Raw Material Composition: Lub uniformity ntawm tempering teb yuav cuam tshuam los ntawm cov kev hloov nyob rau hauv lub theem transformation kub los ntawm variations nyob rau hauv cov ntsiab lus ntawm alloying ntsiab xws li Cr, Mo, thiab V > 0.1%.
Variations nyob rau hauv Thick thiab Nyias Cheeb Tsam 'Tswj Cuab Yeej Thaum qhov loj dua txias dua maj mam thiab feem ntau yuav muaj cov pob muag muag-tshwj xeeb tshaj yog nyob rau hauv cov qauv pwm sib txawv- nyias- cov ntu phab ntsa txias sai thiab muaj zog siab.
Tiag - piv txwv hauv ntiaj teb: Ib lub tuam txhab tempering furnace sensor malfunctioned, ua rau qhov tseeb kub yog 15℃qis dua li qhov xav tau. Raws li qhov tshwm sim, ib pawg ntawm H13 nozzles dhau qhov kev qhia tshwj xeeb los ntawm 22%, nrog rau qhov nyuaj ntawm 46 txog 53 HRC.
2. Kuv tuaj yeem lees paub thiab lees paub li cas?
Multi-point hardness testing: Ib qho anomalous ib leeg-qhov sib txawv hardness ntau dua ob HRC yuav tsum tau soj ntsuam cov txheej txheem;
Metallographic tsom xam: Tshawb xyuas network carbides, untempered martensite, los yog microstructure coarsening;
Txheeb xyuas qhov ntsuas kub ntawm qhov cub kom pom seb puas muaj qhov cuam tshuam lossis qhov hloov pauv hauv cheeb tsam, thiab seb cov txheej txheem tempering kub li cas ntawm 550 thiab 600 degree;
Kev txheeb xyuas cov khoom sib xyaw: Kom paub tseeb tias txhua pawg ntawm cov khoom siv raw txaus siab, siv XRF los sib piv cov ntsiab lus ntawm Cr (5.0% ~ 5.5%), Mo (1.1% ~ 1.75%), thiab V (0.8% ~ 1.2%).
"Cov ntaub ntawv traceability, lub koom haum credibility, thiab cov txheej txheem tswj" yog qhov tseem ceeb ntawm kev nyab xeeb cov ntsiab lus.
