Vim li cas qhov hardness ntawm H13 cov khoom hloov pauv tom qab tempering?
Tso lus
Kev tswj qhov kub tsis raug thaum lub sij hawm tempering, qhov tsis sib xws ntawm qhov sib txawv ntawm qhov workpiece qhov ntev, thiab qhov sib txawv ntawm cov khoom siv raw khoom yog thawj qhov ua rau hardness fluctuation ntawm H13 khoom tom qab tempering. Ua ke, cov ntsiab lus no muaj kev cuam tshuam rau martensitic transformation stability thiab homogeneity.
1. Kev tshuaj xyuas cov ntsiab lus tseem ceeb
Ib yam
Kev piav qhia
Kub Deviation Tempering
Kev tawm dag zog tsis txaus qis dua 550 degree, ua rau muaj zog ntxiv; saum 600 degree, hardness diminishes sai heev. Ib qho kev hloov ntawm hardness ntawm 1 ~ 2 HRC tuaj yeem tshwm sim los ntawm qhov ntsuas kub ntawm ± 10 degree.
Variations nyob rau hauv tus nqi cua txias
Lub workpiece tuab thiab nyias ntu txias ntawm tus nqi sib txawv; cov cheeb tsam thinner txias dua sai dua thiab muaj zog dua, thaum lub thicker seem txias dua maj mam thiab muaj feem ntau yuav muaj qhov muag muag.
Variations nyob rau hauv muaj pes tsawg leeg ntawm raw khoom
Theem transformation kub yuav hloov thiab tempering stability yuav cuam tshuam los ntawm variations nyob rau hauv cov ntsiab lus ntawm alloying ntsiab xws li Cr, Mo, thiab V uas yog ntau tshaj 0.1%.
Tsis txaus cycles ntawm tempering
Thaum cov residual kev nyuaj siab tsuas yog ib feem tso tawm tom qab ib tug tempering voj voog, lub microstructure yuav tsis ruaj tsis khov thiab kev faib ntawm hardness yuav uneven.
Tiag - piv txwv hauv ntiaj teb: Ib pawg ntawm H13 nozzles ntsib qhov ntsuas kub hauv cheeb tsam txo qis vim qhov tshwm sim ntawm lub tshuab hluav taws xob kub tswj qhov kub thiab txias; Kev ntsuam xyuas tau qhia txog qhov sib txawv ntawm qhov tawv tawv ntawm 46 txog 53 HRC, tshaj qhov txwv tau tso cai los ntawm 22%.
2. Yuav ua li cas cov hardness variations yuav txo tau? Kev Tswjhwm nruj nruj: txhawm rau lav lub qhov cub kub qhov sib txawv ntawm Tsawg dua lossis sib npaug li ± 5 degree, siv lub tshuab cua sov uas muaj PID qhov ntsuas kub thiab ntau qhov ntsuas kub ntsuas;
Standardized Loading: Tiv thaiv stacking, tswj qhov chaw ua hauj lwm zoo ib yam, thiab lav zoo cua kub ncig;
Ob chav Tempering: Txhawm rau kom tsis txhob muaj kev ntxhov siab rov qab, txias rau qhov kub thiab txias tom qab pib tempering;
Raw Khoom Ua Ntej- tshuaj xyuas: Siv XRF los xyuas kom meej tias cov khoom sib xyaw ua tau raws li GB / T 1299-2018 tus qauv ua ntej kev kho cua sov, ua tib zoo saib xyuas rau Cr (5.0% ~ 5.5%), Mo (1.1% ~ 1.75%), thiab V (0.8% ~ 1.2%).
Tswv yim: Txhawm rau taug qab qhov sib txawv ntawm qhov kub thiab txias hauv txhua lub cub tawg, xaiv ib tus neeg muab kev pabcuam uas muaj qhov kub thiab txias profile kaw.
3. Cov lus qhia rau ntawm -Qhov Kev Pom Zoo
Kev sim hardness thiab sampling rau txhua batch: Ua ntau yam - taw tes kuaj ntawm workpieces ntawm ob peb lub ntsiab lus siv lub portable hardness tester, ces xam tus nqi nruab nrab;
Tsim cov ntaub ntawv txheej txheem: txhawm rau ua kom muaj teeb meem taug qab yooj yim dua, nco ntsoov txhua lub pob qhov kub thiab txias, lub sijhawm, cov txheej txheem txias, thiab ntsuas qhov nyuaj;
CQI-9 cov chaw muab kev pabcuam tau lees paub tau muab qhov tseem ceeb vim tias lawv cov txheej txheem tswj hwm nruj dua thiab muaj kev lees paub ntau dua ntawm hardness uniformity.
