| Qhov zoo |
Nws tuaj yeem rhuav tshem cov qauv casting ntawm lub ingot, kho cov nplej ntawm cov hlau, thiab tshem tawm qhov tsis xws ntawm microstructure, kom cov qauv hlau yog ntom thiab cov khoom siv kho kom zoo tuaj. Qhov kev txhim kho no feem ntau yog tshwm sim hauv cov kev taw qhia dov, kom cov hlau tsis muaj isotropic rau qee yam; cov npuas, tawg thiab looseness tsim thaum lub sij hawm pouring kuj yuav welded nyob rau hauv kub thiab siab. |
| Qhov tsis zoo |
1. Tom qab kub dov, cov non-metallic inclusions (tsuas yog sulfides thiab oxides, nrog rau silicates) nyob rau hauv cov hlau yog nias rau hauv nyias nyias, thiab stratification (interlayer) tshwm sim. Stratification zoo heev deteriorates tensile kev ua tau zoo ntawm cov hlau raws lub thickness kev taw qhia, thiab interlayer tearing yuav tshwm sim thaum lub weld shrinks. Cov kab mob hauv cheeb tsam cuam tshuam los ntawm weld shrinkage feem ntau nce mus txog ob peb zaug ntawm cov ntsiab lus tawm los, uas yog loj dua li cov kab mob tshwm sim los ntawm kev thauj khoom; |
| 2. Kev ntxhov siab uas tshwm sim los ntawm qhov tsis sib xws. Residual stress yog qhov kev ntxhov siab hauv tus kheej uas tsis muaj kev quab yuam sab nraud. Kub-kuav los tiag steel seem ntawm ntau yam ntoo khaub lig-section muaj hom kev ntxhov siab seem. Feem ntau, qhov loj dua qhov loj ntawm cov ntu ntu ntawm cov hlau, qhov ntau dua qhov kev ntxhov siab seem. Txawm hais tias residual kev ntxhov siab yog tus kheej sib npaug, nws tseem muaj qee yam cuam tshuam rau kev ua haujlwm ntawm cov khoom siv hlau nyob rau sab nraud, xws li deformation, stability, qaug zog, thiab lwm yam. |
