Ukukhubazeka Okujwayelekile ku-Magnesium Alloy Welding

(1) Ikristalu elimahhadla

I-Magnesium inephuzu eliphansi lokuncibilika kanye ne-thermal conductivity ephezulu. Umthombo wokushisa we-welding onamandla aphezulu uyadingeka ngesikhathi sokushisela. Izindawo ze-weld kanye ne-seam-seam zijwayele ukushisa ngokweqile, ukukhula okusanhlamvu, ukuhlukaniswa kwe-crystal nezinye izenzakalo, okunciphisa ukusebenza okuhlangene.

(2) I-oxidation kanye nokuhwamuka

I-Magnesium i-oxidizing kakhulu futhi ihlangana kalula nomoya-mpilo. Kulula ukwenza i-MgO ngesikhathi senqubo yokushisela. I-MgO inezinga eliphezulu lokuncibilika (2 500 ℃) kanye nokuminyana okuphezulu (3. 2 g/cm-3), futhi kulula ukwenza ama-flakes amancane ekushiseleni. Ukufakwa kwe-slag okuqinile akuvimbeli nje kuphela ukwakheka kwe-weld, kodwa futhi kunciphisa ukusebenza kwe-weld. Emazingeni okushisa aphezulu okushisela, i-magnesium ingahlangana kalula ne-nitrogen emoyeni ukuze yakhe i-magnesium nitride. Ukufakwa kwe-Magnesium nitride slag nakho kuzodala ukwehla kwe-plasticity yensimbi ye-weld futhi kubi kakhulu ukusebenza okuhlangene. Iphoyinti lokubilisa le-magnesium alikho phezulu (1100 ℃) futhi kulula ukuhwamuka ngaphansi kwezinga lokushisa eliphezulu le-arc.

(3) Ukushiswa nokuwa kwezingxenye ezincane

Lapho kushiselwa izingxenye ezincane, ngenxa yezinga eliphansi lokuncibilika le-magnesium alloy kanye nephuzu eliphakeme lokuncibilika le-magnesium oxide, lezi ezimbili azihlanganisi kalula, okwenza kube nzima ukubona inqubo yokuncibilika komthungo wokushisela ngesikhathi sokushisela. Njengoba izinga lokushisa likhuphuka, umbala wechibi elincibilikisiwe awushintshi ngokuphawulekayo, okulenza lithande ukusha nokubhidlika.

(4) Ukucindezeleka okushisayo nokuqhekeka

I-Magnesium ne-magnesium alloys ine-coefficient ephakeme kakhulu yokwandisa okushisayo, cishe kabili kunensimbi kanye ne-1 Kabili, kulula ukubangela ukucindezeleka okukhulu kwe-welding kanye nokuguqulwa ngesikhathi senqubo yokushisela. I-Magnesium yenza kalula i-eutectic yendawo encibilikayo enezinto ezithile ezixubile (ezifana ne-Cu, Al, Ni, njll.) (njengezinga lokushisa le-Mg Cu eutectic elingu-480 ℃, izinga lokushisa le-Mg Al eutectic elingu-430 ℃, izinga lokushisa le-Mg Ni eutectic elingu-508 ℃) , enobubanzi obubanzi bokushisa obunqamukayo kanye nokwakheka okulula kwemifantu eshisayo. Ucwaningo luthole ukuthi uma i-w (Zn)>1%, inyusa ukuqina kwe-thermal futhi ingaholela ekuqhekekeni kokushisela. Ukwengeza u-w (Al) ≤ 10% ku-magnesium kungacolisa usayizi wokusanhlamvu we-weld futhi kuthuthukise ukushisela. Ama-alloys e-Magnesium aqukethe inani elincane le-Th anokushisela okuhle futhi awathambekele ekuqhekekeni.

(5) Stomata

Izimbotshana ze-hydrogen zikhiqizwa kalula ngesikhathi sokushiselwa kwe-magnesium, futhi ukuncibilika kwe-hydrogen ku-magnesium nakho kwehla kakhulu ngokuncipha kwezinga lokushisa.

(6) I-Magnesium nama-alloys ayo athambekele ekubeni ne-oxidation futhi ashiswe ngesikhathi sokushisela endaweni yomoya, futhi idinga igesi engasebenzi noma ukuvikelwa kwe-flux ngesikhathi sokushisela ·