Ua rau Cracks hauv Mid-Frequency Spot Welds

Kev tshuaj xyuas ntawm cov laj thawj ntawm cov kab nrib pleb hauv qee yam qauv welds yog ua los ntawm plaub yam: macroscopic morphology ntawm vuam sib koom, microscopic morphology, lub zog spectrum tsom xam, thiab kev tsom xam metallographicmid-frequency chaw vuam tshuabvuam. Cov kev soj ntsuam thiab kev soj ntsuam qhia tau hais tias cov vuam tawg yog tshwm sim los ntawm sab nraud quab yuam, feem ntau yog vim muaj cov vuam tsis xws luag, nrog cov txheej txheem vuam tsis zoo thiab kev tu tsis zoo ntawm cov vuam qhov chaw yog qhov tseem ceeb ua rau muaj qhov tsis xws luag. Hauv qab no yog ob peb yam teeb meem uas ua rau kev sib koom ua ke:

Crystalline tawg:
Thaum lub sij hawm lub solidification thiab crystallization ntawm lub vuam pas dej ua ke, cov kab nrib pleb tsim raws li ib thaj tsam ntawm cov hlau weld vim crystallization segregation thiab shrinkage kev nyuaj siab thiab strain. Cov kab nrib pleb no tsuas yog tshwm sim hauv qhov vuam.

Liquation cracks:
Thaum lub sij hawm welding, nyob rau hauv tus ntawm lub ncov kub nyob rau hauv lub welding tshav kub voj voog, intergranular hlau nyob ze ntawm lub weld seam nyob rau hauv lub interlayers ntawm ntau txheej welds yuav rov yaj vim cua sov. Nyob rau hauv qee qhov kev ntxhov siab shrinkage, cov kab nrib pleb loj hlob raws austenite grain ciam teb, ib qho tshwm sim qee zaum hu ua kub tearing.
High-temperature low-ductility cracks:
Tom qab ua tiav cov kua theem crystallization, raws li cov welded sib koom ua ke hlau pib txias los ntawm cov khoom ductile rov qab kub, rau tej yam ntaub ntawv, thaum txias mus rau ib tug tej yam kub kub, lub ductility yuav txo vim muaj kev cuam tshuam ntawm strain tus nqi thiab metallurgical yam, ua. kom tawg raws li cov ciaj ciam ntawm cov welded sib koom hlau. Hom kev tawg no feem ntau tshwm sim hauv thaj chaw uas muaj kev kub ntxhov nyob deb ntawm txoj kab fusion tshaj liquation tawg.
Reheat cracks:
Tom qab vuam, thaum muaj kev ntxhov siab los ntawm kev kho cua sov los yog tsis muaj kev kho cua sov, cov kab nrib pleb tshwm sim raws li austenite grain ciam teb ntawm cov hlau vuam ntawm qhov kub thiab txias nyob rau hauv tej yam kev mob. Reheat cov kab nrib pleb yog ib qho teeb meem tseem ceeb hauv kev vuam ntawm cov hlau uas tsis tshua muaj zog, tshwj xeeb tshaj yog nyob rau hauv cov phaj tuab welds ntawm cov hlau tsis tshua muaj siab-carbon steels thiab cov hlau tsis muaj cua sov uas muaj cov carbide-forming ntau (xws li Cr. , Mo, V). Kev daws cov teeb meem no yog siv sijhawm ntev thiab muaj kev cuam tshuam loj rau kev tsim khoom.
Suzhou Agera Automation Equipment Co., Ltd. tshwj xeeb hauv kev tsim cov khoom siv hluav taws xob sib dhos, vuam, cov khoom siv kuaj, thiab cov kab ntau lawm, feem ntau ua haujlwm rau kev lag luam xws li khoom siv hauv tsev, kev tsim tsheb, cov ntawv hlau, thiab 3C electronics. Peb muab cov tshuab vuam customized, cov cuab yeej siv vuam tshuab, thiab sib dhos vuam cov kab ntau lawm raws li cov neeg siv khoom xav tau, muab cov kev daws teeb meem zoo tag nrho los pab cov tuam txhab hauv kev hloov pauv sai ntawm cov txheej txheem ntau lawm mus rau high-end ntau lawm txoj kev. Yog tias koj txaus siab rau peb cov khoom siv automation thiab cov kab ntau lawm, thov hu rau peb: leo@agerawelder.com