1. Hnav tsis kam
Thaum cov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Yog li ntawd, kev hnav tsis kam ntawm cov ntaub ntawv yog ib qho ntawm cov khoom tseem ceeb thiab tseem ceeb ntawm cov pwm.
Hardness yog qhov tseem ceeb cuam tshuam rau kev hnav tsis kam. Feem ntau, qhov siab dua qhov hardness ntawm qhov chaw tuag, qhov hnav me dua, thiab qhov zoo dua qhov hnav tsis kam. Tsis tas li ntawd, qhov hnav tsis kam kuj tseem cuam tshuam rau hom, qhov ntau, cov duab, qhov loj me thiab kev faib tawm ntawm carbides hauv cov khoom.
2. Lub zog thiab tawv
Kev ua haujlwm ntawm pwm feem ntau yog qhov phem heev, thiab qee qhov feem ntau dais qhov cuam tshuam loj, ua rau tawg tawg. Txhawm rau tiv thaiv kev tawg sai sai ntawm qhov chaw tuag thaum lub sijhawm ua haujlwm, cov tuag yuav tsum muaj lub zog siab thiab toughness.
Lub toughness ntawm cov tuag tsuas yog nyob ntawm cov ntsiab lus carbon, grain loj thiab microstructure ntawm cov khoom.
3. Kev qaug zog tawg ua haujlwm
Nyob rau hauv tus txheej txheem ntawm kev tuag ua hauj lwm, qaug zog tawg yog feem ntau tshwm sim los ntawm lub sij hawm ntev kev txiav txim ntawm cyclic kev nyuaj siab. Nws cov ntaub ntawv muaj xws li lub zog me me ntau yam cuam tshuam rau qaug zog pob txha, tensile fatigue fracture, hu rau qaug zog tawg thiab khoov qaug zog tawg.
Kev ua haujlwm ntawm kev qaug zog ntawm qhov tuag feem ntau yog nyob ntawm nws lub zog, toughness, hardness thiab cov ntsiab lus ntawm kev suav nrog hauv cov khoom.
4. Kev ua haujlwm siab kub
Thaum ua hauj lwm kub ntawm qhov tuag yog siab, lub hardness thiab lub zog yuav txo, ua rau thaum ntxov hnav los yog yas deformation thiab tsis ua hauj lwm ntawm tuag. Yog li ntawd, cov khoom siv tuag yuav tsum muaj kev ruaj ntseg siab kom ntseeg tau tias cov tuag muaj siab hardness thiab lub zog ntawm kev ua haujlwm kub.
5. Txias thiab kub qaug zog ua haujlwm
Qee cov pwm yog nyob rau hauv lub xeev ntawm rov ua cua sov thiab txias nyob rau hauv cov txheej txheem ua hauj lwm, yog li ntawd lub nto ntawm cov kab noj hniav nyob rau hauv qhov kev txiav txim ntawm tensile thiab siab strain stress, uas ua rau nto tawg thiab tev, nce kev sib txhuam, cuam tshuam cov yas deformation thiab txo qhov seem. raug, ua rau pwm tsis ua hauj lwm. Mob khaub thuas thiab kub qaug zog yog ib qho ntawm cov ntaub ntawv tseem ceeb ntawm kev ua haujlwm kub tuag tsis ua haujlwm. Cov tuag zoo li no yuav tsum muaj qhov txias txias thiab kub qaug zog tiv thaiv.
6. corrosion kuj
Thaum qee cov pwm xws li cov pwm yas ua haujlwm, vim tias muaj cov tshuaj chlorine, fluorine thiab lwm yam khoom hauv cov yas, lawv decompose thiab precipitate muaj zog corrosive gases xws li HCI thiab HF tom qab cua sov, uas erodes saum npoo ntawm pwm kab noj hniav, nce. nws nto roughness thiab aggravate hnav tsis ua hauj lwm.
