1. mob kuj:
Thaum cov voos voos yog plastically denatured hauv cov pwm kab noj hniav, nws ntws thiab swb raws cov kab noj hniav, ua rau muaj kev sib txhuam hnyav ntawm qhov chaw kab noj hniav thiab qhov chaw khoob, uas ua rau kom pwm tsis tas vim hnav. Yog li ntawd, kev hnav tsis kam ntawm cov khoom siv yog ib qho ntawm cov qauv yooj yim thiab qhov tseem ceeb ntawm cov pwm. Hardness yog qhov tseem ceeb cuam tshuam rau hnav tsis kam. Feem ntau, qhov hnyav dua ntawm cov pwm ua ib feem, hnav me dua, thiab qhov zoo dua qhov hnav tsis kam. Ntxiv rau, cov hnav tsis kam kuj tseem muaj feem xyuam rau hom, qhov ntau, cov qauv, qhov loj me thiab kev faib tawm ntawm carbides hauv cov khoom siv.
2. mob tawv:
Feem ntau ntawm cov haujlwm ua haujlwm ntawm cov pwm yog qhov tsis zoo, thiab qee qhov feem ntau cuam tshuam los ntawm qhov kev cuam tshuam loj, ua rau muaj pob tawg. Txhawm rau tiv thaiv cov pwm ntu ntawm kev tawg tam sim ntawd thaum ua haujlwm, lub pwm yuav tsum muaj qhov muaj zog thiab tawv. Lub zog ntawm cov pwm nyob ntawm lub ntsiab lus carbon ntau, qhov loj me thiab microstructure ntawm cov khoom.
3. ua kom zoo ntawm pob txha lov:
Thaum lub sijhawm ua haujlwm ntawm pwm, nyob rau hauv kev ua haujlwm ntev ntawm qhov kev ntxhov siab cyclic, nkees nkees feem ntau ua rau. Daim ntawv muaj zog me me ntau qhov cuam tshuam kev nkees nkees dhau, sib sib zog ua rau lub cev thim rov qab ua rau qaug zog sib tsoo thiab khoov pob txha lov.
4.High kub kev ua tau zoo:
Thaum ua haujlwm kub ntawm lub pwm ua kom siab dua, lub hardness thiab lub zog qis dua, uas ua rau kev hnav thaum ntxov ua pwm lossis yas deformation thiab tsis ua haujlwm. Yog li ntawd, cov khoom siv pwm yuav tsum muaj qhov kub siab ruaj khov kom ntseeg tau tias qhov siab hardness thiab lub zog ntawm cov pwm ntawm qhov kub ua haujlwm.
