Cov tsos ntawm graphite pwm feem ntau yog coated nrog cov txheej txheem tiv thaiv oxidation, yog li cov txheej txheem tiv thaiv uas tiv taus kub thiab oxidation tuaj yeem txo cov ntaub ntawv poob ntawm steelmaking los ntawm 19 mus rau ib nrab, thiab lub neej ntawm cov ntaub ntawv siv yuav kuj ntxiv 20 mus rau 60 feem pua, thiab tom qab ntawd txo tus nqi ntawm steelmaking, uas yog cov khoom ua pwm zoo heev.
Ntxiv rau qhov tsim nyog ua ke ntawm cov substrate nrog siab txaus lub zog thiab toughness, cov tsos ntawm graphite pwm yog qhov tseem ceeb heev rau kev ua haujlwm thiab kev pabcuam lub neej ntawm graphite pwm. Cov txheej txheem kho saum npoo ntawm graphite pwm yog ib qho kev tsim vaj tsev uas hloov cov duab, tshuaj lom neeg muaj pes tsawg leeg, kev teeb tsa thiab kev ntxhov siab ntawm qhov tshwm sim ntawm graphite pwm los ntawm txheej txheej, kev hloov kho deg lossis kev kho tshuab sib xyaw, kom tau txais cov haujlwm saum npoo. Tam sim no feem ntau siv hauv graphite pwm tsim yog nitriding, carburizing thiab hardened zaj duab xis tsub zuj zuj.
Vim tias cov cuab yeej siv nitriding tuaj yeem tsim qhov ua haujlwm zoo heev, thiab cov txheej txheem nitriding muaj kev sib koom tes zoo nrog cov txheej txheem quenching ntawm graphite tuag hlau, thiab nitriding kub tsis tshua muaj, tsis tas yuav txias txias tom qab nitriding, thiab deformation ntawm graphite. pwm yog qhov me me, yog li qhov pom kev ntxiv dag zog ntawm graphite pwm yog qhov kev xaiv thaum ntxov ntawm nitriding tshuab, thiab nws kuj yog siv dav tshaj plaws.
Graphite pwm carburizing yog los txhim kho tag nrho lub zog thiab toughness ntawm graphite pwm, uas yog, ua hauj lwm nto ntawm graphite pwm muaj siab zog thiab hnav tsis kam. Tam sim no cov kev txawj ntse ntawm cov yeeb yaj kiab tawv tawv tau muaj kev paub ntau dua hauv CVD thiab PVD. Txij li thaum 80s ntawm lub xyoo pua xeem, graphite pwm tau coated nrog hardened film technology. Raws li cov txheej txheem kev txawj tam sim no, tus nqi ntawm cov khoom siv tawv tawv tawv (tsuas yog cov cuab yeej siv) yog siab dua, thiab nws tseem tsuas yog siv qee qhov zoo, lub neej ntev graphite pwm, yog tias koj xaiv los tsim lub chaw kho cua sov, tus nqi ntawm txheej txheej. hardened zaj duab xis yuav raug txo kom tsawg, thiab ntau graphite pwm Yog tias koj xaiv qhov kev txawj no, koj tuaj yeem txhim kho qib ntawm graphite pwm tsim hauv Suav teb tag nrho.