Qhov cuam tshuam ncaj qha ntawm kev nkag mus tsis tiav rau cov qauv welded yog kom txo tau cov kabmob hla ntu thiab txo cov khoom siv ntawm cov khoom sib txuas. Kev ntxhov siab concentration tshwm sim los ntawm qhov tsis muaj kev nkag mus yog qhov teeb meem ntau dua li qhov txo qis hauv lub zog. Welded qauv raug hloov pauv, poob siab loads, kev nyuaj siab corrosion los yog kev khiav hauj lwm ntawm qhov kub thiab txias feem ntau ua rau nkig puas.
Qhov tsis muaj fusion tsis tsuas yog txo qhov ua tau zoo ntawm cov qauv welded, tab sis kuj thaum siv lub workpiece, kev ntxhov siab concentration yuav tshwm sim ntawm ntug ntawm qhov tsis-fusion, thiab cov kab nrib pleb yog tsim ntawm no, ua rau tawg ntawm tag nrho weld.
(1) Incomplete penetration Incomplete penetration is the phenomenon that the root of the welded joint is not full penetrated. Ob qho tib si welding thiab ob sab vuam tuaj yeem ua rau qhov tsis tiav kev nkag mus, thiab cov yam ntxwv morphological ntawm kev nkag tsis tiav hauv cov vuam yog qhia hauv daim duab 1-10.
1) Ua rau muaj kev nkag mus tsis tiav:
Kev xaiv tsis raug ntawm vuam tsis zoo, xws li cov vuam tam sim no me me dhau, kev khiav ceev dhau, lub kaum sab xis electrode tsis zoo, lub tshuab arc tshuab, qhov sib txawv me me dhau lawm thiab lub kaum sab xis tsis zoo, thiab lwm yam, tsis muaj kev nkag mus tau me ntsis ua rau vuam metallurgical yam;
Kev ua haujlwm yuam kev, xws li qhov chaw sib dhos thaum ob tog submerged arc vuam yam tsis muaj qhov qhib qhib, thiab lwm yam;
Kev ua haujlwm tsis zoo, xws li tuab tuab heev, lossis ib sab yog tuab thiab ib sab yog nyias, thiab cov vuam tam sim no me dhau.
2) Kev tiv thaiv kev tiv thaiv rau kev nkag mus tsis tiav:
Vuam nrog ntau dua tam sim no yog txoj hauv kev los tiv thaiv qhov tsis xws luag. Rau fillet welds, siv AC es tsis txhob DC los tiv thaiv magnetic bias tshuab.
Tsis tas li ntawd, kev ntsuas xws li tsim qhov zawj kom tsim nyog, ua kom qhov zawj huv si, thiab siv cov vuam arc luv luv kuj tuaj yeem tiv thaiv qhov tshwm sim ntawm qhov tsis tiav kev nkag mus.
(2) Qhov uas tsis yog tag nrho fused ntawm cov hlau weld thiab lub hauv paus hlau los yog cov hlaws hlaws hlau thiab cov hlaws hlaws hlau yog hu ua tsis tiav fusion.
Kev tsis sib haum xeeb feem ntau tshwm sim rau ntawm phab ntsa ntawm qhov zawj, nruab nrab ntawm cov txheej txheej ntawm ntau txheej vuam thiab ntawm lub hauv paus ntawm cov welding. Qee lub sij hawm qhov sib txawv loj, thiab nws yog indistinguishable los ntawm slag;
Qee lub sij hawm daim ntawv cog lus yog nruj tab sis tsis welded, thiab microcracks zoo li tshwm sim ntawm qhov kawg ntawm qhov chaw tsis siv.
1) Ua rau tsis muaj qhov tsis xws luag:
Lub vuam nto tsis huv, thiab muaj roj lossis xeb; qhov zawj zoo li tsis tsim nyog, thiab muaj cov ces kaum tuag; qhov vuam tam sim no tsawg dhau; Lub vuam teeb tsis viav vias txaus: tus welder nce qhov tam sim no yam tsis muaj kev tso cai los ua kom lub vuam ceev, thiab lwm yam.
2) Kev tiv thaiv kev tiv thaiv rau qhov tsis xws luag:
Siv lub vuam tam sim no siab dua los ua qhov vuam ua haujlwm kom raug thiab ua kom qhov zawj huv si.
