409 stainless hlau txias dov phaj kub kho

409 stainless hlau yog chromium-nickel stainless hlau, feem ntau muaj 11-13% chromium thiab 0.5% npib tsib xee. Vim nws zoo heev corrosion kuj thiab kub tsis kam, 409 stainless hlau yog dav siv nyob rau hauv automotive tso systems, furnaces, burners thiab tshuaj cov khoom. Cov hauv qab no qhia txog kev kho cua sov ntawm 409 stainless hlau:

1. Kev Kho Mob:

Ntawm qhov kub ntawm 1038-1149, 409 stainless hlau yog sai rhuab thiab khaws cia sov rau ib lub sij hawm kom ua tiav lub hom phiaj ntawm kev daws teeb meem. Txoj kev kho no tuaj yeem txo qhov hardness ntawm 409 stainless hlau thiab txhim kho nws cov machinability thiab txias ua haujlwm. Tsis tas li ntawd, kev kho tshuaj kuj tuaj yeem txhim kho corrosion kuj thiab oxidation tsis kam ntawm 409 stainless hlau.

2. Residual Stress Relieving:

409 stainless hlau tuaj yeem tsim kev ntxhov siab tom qab vuam lossis ua haujlwm txias, uas tuaj yeem ua rau deformation ntawm qhov chaw lossis cuam tshuam rau lawv lub neej kev pabcuam. Los ntawm kev kho cua sov ntawm qhov kub ntawm 750-870, qhov kev ntxhov siab seem tuaj yeem raug tshem tawm tau zoo thiab lub zog thiab ruaj khov ntawm cov khoom tuaj yeem txhim kho.

3. Grain Refinement Treatment:

409 stainless hlau yuav loj hlob nplej ntawm qhov kub thiab txias, uas yuav cuam tshuam rau nws cov kev ua tau zoo tag nrho. Annealing ntawm 950-1050 degree tuaj yeem kho cov nplej thiab txhim kho cov yas thiab tawv ntawm 409 stainless hlau.

4. Quenching:

Kev txias sai sai 409 stainless hlau hauv cov kua nruab nrab tuaj yeem ua rau nws muaj zog thiab tawv. Txawm li cas los xij, txij li cov tshuaj muaj pes tsawg leeg ntawm 409 stainless hlau muaj cov ntsiab lus xws li chromium thiab antimony, cov ntsiab lus no yuav ua rau muaj kev kub ntxhov ntawm cov hlau tsis muaj steel, yog li qhov txias thiab kub yuav tsum tau tswj xyuas thaum lub sij hawm quenching.