Thaum siv cov kav dej me me tuab-walled steel kav, yog tias nws ntsib cov brittleness kub, nws yuav cuam tshuam rau kev siv ib txwm muaj. Dab tsi yog vim li cas rau qhov kub brittleness ntawm me me txoj kab uas hla tuab-walled steel yeeb nkab?
Vim tias qhov sib txawv ntawm qhov sib txawv ntawm cov kab me me tuab-walled steel yeeb nkab cov pob qij txha, cov kev ntxhov siab sab hauv loj yuav raug tsim thaum cua sov, tshwj xeeb tshaj yog thaum kub hloov pauv los yog tom qab ob peb zaug ntawm cua sov, thermal qaug zog tawg yuav tshwm sim. Txawm li cas los xij, nws txawv ntawm ib hom kub kub qaug zog, uas yog tshwm sim los ntawm kev kub siab hloov pauv vim yog sab nraud quab yuam, thiab qhov qub yog kub embrittlement tshwm sim los ntawm qhov kub hloov pauv los ntawm kev ntxhov siab sab hauv.
Rau kev nyab xeeb kev nyab xeeb ntawm stainless hlau welded yeeb nkab intergranular corrosion engineering project, tom qab macroeconomic pov thawj, nws tuaj yeem xaus lus tias tsuas yog ib feem ntawm cov welded steel yeeb nkab yog ib feem corroded los ntawm cov cuab yeej thiab cov khoom puas los ntawm intergranular corrosion. Rau qee yam tshuaj, qee qhov tsis tsuas yog muaj kev cuam tshuam loj heev ntawm intergranular corrosion, tab sis kuj tseem muaj kev xeb loj heev.
Thaum cov kab me me tuab-walled steel kav yog kub thiab nkig, cov txheej txheem tsim nyog yuav tsum tau siv los kho lawv.
Nyob rau hauv cov txheej txheem ntawm me me txoj kab uas hla tuab-walled steel kav, nws yog ib qho tseem ceeb heev kom ua raws li kev kho cua sov kom zoo. Yog tias kev kho cua sov ua tiav zoo, kev ua haujlwm ntawm cov kab me me tuab-walled steel kav yuav tau lav. Yog li yuav ua li cas cov kab me me tuab-walled steel kav yuav tsum tau kho kom zoo?
quenching: Cias muab, qhov no yog ib qho kev daws teeb meem, cov yeeb nkab stainless hlau yog quenched tom qab quenching kom tawv. Los ntawm kev tsim thiab tsim cov vintage Japanese riam mus rau tag nrho cov txheej txheem ntau lawm. Ntawm chav kawm, tsis yog txhua yam yog txias. Cov qib sib txawv ntawm cov kav dej stainless hlau muaj qhov sib txheeb ntawm cov cua sov, tuav lub sijhawm thiab txoj kev txias. Feem ntau siv stainless hlau yeeb nkab yog xaiv rau martensitization kub, kom nws ua austenitic qauv thiab tau txais siab toughness. Thaum kawg, nws raug yuam kom dhau los ua ib lub koom haum tsim nyog.
Hardening: Qhov no yog ib txoj kev kho cua sov uas cov kav hlau stainless yog cua sov thiab txias nrog kev ncua kom soften lossis txo lawv cov kev ntxhov siab sab hauv. Tau kawg, qhov no kuj suav nrog cov cua sov, tuav lub sijhawm thiab txoj kev txias. Cov ntaub ntawv nyoos uas tsis yog laser cuttable tuaj yeem ua kom txias. Raws li cov castings deformed los ntawm laser txiav, qhov teeb meem no kuj yuav raug tshem tawm nyob ntawm qhov xwm txheej txias. Yog li ntawd, qhov no yog ib txoj kev ua haujlwm tseem ceeb heev.
