Vim li cas thiaj muaj qhov sib txawv ntawm qhov nyuaj tom qab tempering hauv H13 khoom?

Tsis sib xws tempering kub, tsis xwm yeem workpiece txias, variations nyob rau hauv raw khoom muaj pes tsawg leeg, thiab tsis txaus tempering cycles yog lub hauv paus ua rau cov variation nyob rau hauv hardness tom qab tempering nyob rau hauv H13 khoom. Ua ke, cov ntsiab lus no muaj kev cuam tshuam rau martensitic tempering qhov sib xws thiab ruaj khov.

1. Kev tshuaj xyuas cov ntsiab lus tseem ceeb

Yam thiab Yuav Ua Li Cas Lawv cuam tshuam Hardness

Tsis raug Tempering Temperature Control: Lub matrix softens thiab hardness poob (<48 HRC) at 600°C; tempering is insufficient below 550°C, leading to a higher hardness (>52 HRC). Kub variations nyob rau hauv lub cub tawg tshaj ± 5℃tuaj yeem ua rau muaj kev hloov pauv loj hauv qhov tawv.

Cov cua txias tsis sib xws: Thaum cov khoom tuab lossis cov khoom sib dhos txias dua qeeb thiab yooj yim tsim cov pob muag, nyias- cov phab ntsa txias ceev thiab muaj qhov tawv tawv. Qhov no tshwj xeeb tshaj yog pom nyob rau hauv cov txheej txheem pwm nyuaj.

Deviations nyob rau hauv raw khoom muaj pes tsawg leeg: Workpieces los ntawm tib lub cub tawg yuav qhia inconsistent tempering teb yog hais tias lub theem transformation kub yog hloov los ntawm variations nyob rau hauv cov ntsiab lus ntawm alloying ntsiab xws li Cr, Mo, thiab V ntau tshaj 0.1%.

Ib lub voj voog tempering tsis txaus kom tso tawm qhov kev ntxhov siab tag nrho, uas ua rau lub microstructure tsis ruaj khov thiab muaj kev xav rau kev ntxhov siab thaum lub sijhawm ua haujlwm ntxiv lossis kev pabcuam, uas ua rau muaj qhov tsis sib xws ntawm cov tawv tawv.

Tiag - piv txwv hauv ntiaj teb: Qhov ntsuas kub tiag tiag hauv lub cub tawg yog 15℃qis dua li qhov xav tau vim yog qhov ua txhaum ntawm qhov ntsuas. Melt leakage tshwm sim nyob rau hauv peb hnub ntawm kev tsim khoom, thiab ib pawg ntawm H13 nozzles pom qhov nyuaj ntawm 46 txog 53 HRC, tshaj qhov yuav tsum tau ua los ntawm 22%.

2. Kuv tuaj yeem lees paub thiab lees paub li cas? Multi-point hardness testing: Ib qho -qhov sib txawv hardness ntau dua li ob HRC yog suav tias yog qhov txawv txav thiab 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 qhov ntsuas kub li cas yog nyob 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, txhim khu kev qha microstructure, thiab cov txheej txheem tswj tau" yog cov qauv kev nyab xeeb tseem ceeb.