Cov teeb meem twg muaj kev cuam tshuam loj tshaj plaws rau kev nyab xeeb ntawm cov hlab ntsha?

1. Corrosion Defects: Intergranular Corrosion yog qhov txaus ntshai tshaj plaws. Intergranular corrosion tshwm sim raws thaj tsam ntawm cov nplej hlau, ncaj qha rhuav tshem lub zog sib txuas ntawm cov nplej thiab ua rau muaj kev poob qis hauv cov khoom siv tshuab. Ntxiv mus, qhov chaw corrosion yog muab zais, thiab lub nkoj lub ntsej muag feem ntau tsis qhia pom kev hloov pauv. Txawm li cas los xij, nyob rau hauv kev kub siab, nws tuaj yeem ua rau nkig tawg, uas yog qhov nyuaj rau kev kwv yees thiab tiv thaiv. Nws qhov kev phom sij yog ntau dua li cov khoom siv corrosion thiab pitting corrosion. Uniform corrosion tuaj yeem tiv thaiv los ntawm ua ntej - phab ntsa tuab thiab yooj yim los saib xyuas. Pitting corrosion yog localized thiab yooj yim mus ntes, thiab nws txoj kev pheej hmoo yog qis dua intergranular corrosion.

2. Kev tsim khoom / vuam tsis xws luag: Vuam tawg yog qhov txaus ntshai tshaj plaws. Vuam kab nrib pleb yog cov ntse tshaj qhov tsis xws luag. Lub vojvoog ntawm curvature ntawm lub hauv paus hauv paus yog ze rau xoom, ua rau muaj kev ntxhov siab heev. Nws yog ib qho tseem ceeb ua rau pob txha tawg, qaug zog tawg, thiab kev ntxhov siab corrosion tawg hauv cov hlab ntsha. Tsis tas li ntawd, cov kab nrib pleb yooj yim txuas ntxiv mus, uas ua rau lub nkoj tsis ua hauj lwm tam sim ntawd. Nws yog hom kev phom sij tshaj plaws ntawm vuam tsis xws luag, deb tshaj lwm yam vuam tsis xws li porosity, slag inclusions, thiab ntau misalignment.

Ntxiv rau ob hom kev pheej hmoo siab - cov kev pheej hmoo uas tau hais los saum toj no, peb hom kev tsim khoom tsis raug tuaj yeem cuam tshuam rau kev nyab xeeb:

Geometric discontinuities: Xws li cov pob qij txha misaligned, angular deformation, tsis yog - ncig hla- ntu ntawm lub tog raj kheej, thiab qhov tsis sib xws ntawm lub hau kawg, cov teeb meem no tuaj yeem ua rau muaj kev ntxhov siab ntxiv, ua rau muaj kev ntxhov siab hauv zos ntau dhau. Rau cov hlab ntsha nyob rau hauv lub siab sab nraud, cov uas tsis yog -vaj huam sib luag- ntu kuj tseem yuav txo qis qhov tseem ceeb, thaum kawg ua rau muaj kev tsis ruaj khov thiab tawg.

Kev ntxhov siab sab hauv: Kev ntxhov siab sab hauv seem tom qab vuam thiab ua haujlwm txias, txawm tias nws tsis ncaj qha ua rau tawg, tuaj yeem ua rau qaug zog tawg thiab kev ntxhov siab corrosion tawg hauv cov hlab ntsha siab, thiab yog qhov tseem ceeb ntawm kev ntxhov siab corrosion tawg.

Kev nkag mus tsis tiav: Qhov no ua rau pom tseeb qhov khoob hauv qhov vuam, ua rau muaj kev ntxhov siab loj heev, thiab tseem yog ib qho ua rau nkig tawg thiab qaug zog tawg.