Rwol Protettiv Gassijiet
In laser welding, the shielding gas affects the weld shape, weld quality, weld quality, weld depth, and width. In most cases, the blowing of shielding gas has a positive effect on the weld, but it can also have a negative effect.
Posittiv effett
Il korrett infiħ ta ' protezzjoni gass se b'mod effettiv jipproteġi il - weld pool minn ossidazzjoni u anke ossidazzjoni.
Korrett infiħ ta ' protezzjoni gass jista' b'mod effettiv jimminimizza il - spatter iġġenerat matul il il iwweldjar proċess.
B'mod korrett daqqa in il protezzjoni gass jista ' jippromwovi il - weldjatura tidwib pool solidifikazzjoni indaqs spread, hekk dak il - weld iffurmar uniformità u estetika
Il korrett infiħ ta ' il protettiv gass jista' effettivament inaqqas il - ... protezzjoni effett ta ' il- metall fwar għanbaqar jew plażma sħaba fuq il - laser % 2c żieda il- effettiv użu ta ' il- laser.
Korrett infiħ ta ' protezzjoni gass jista' b'mod effettiv naqqas weld porożità.
Korrett daqqa ta ' protezzjoni gass can b'mod effettiv naqqas weld porożità. Madankollu, mhux korrett użu ta ' protezzjoni gass jista' ukoll avvers effett iwweldjar.
Negattiv impatt
Inkorrett infiħ ta ' protezzjoni gass jista' imexxi għal deterjorazzjoni ta ' il - iwweldjar.
Selection of the wrong type of gas may lead to cracks in the weld and may also lead to a reduction in the mechanical properties of the weld
Tagħżel il ħażin gass blow-in fluss rata tista ' twassal għal aktar sever ossidazzjoni ta' il - weld (kemm jekk il fluss rata hija għolja jew wisq baxxa 2c u tista ' ukoll ċomb għal serju disturbi ta' il- ... il weld pool li jirriżulta f ' a kollass jew b'mod irregolari forma weldjatura.
Il ħażin għażla ta ' gass-infiħ metodu jista' ċomb għal mhux protett jew virtwalment mhux protett welds jew weġgħat il weld forma.
Il blowing of shielding gas will have a certain effect on the weld depth, especial when welding thin plates, li li will reduce the weld depth.
Tipi ta ' Protettivi Gassijiet
Komunement użat laser welding shielding gases huma N2, Ar, and He, tagħhom fiżiċi u kimiċi proprjetajiet huma differenti, u għalhekk l-effett fuq il-weldjatura is ukoll differenti.
Il jonizzazzjoni enerġija ta ' N2 huwa moderat , ogħla minn dak ta' Ar, u inqas minn dak ta ' He, u il grad ta' jonizzazzjoni taħt l-azzjoni ta ' il-laser huwa ġenerali % 2c li jista' aħjar inaqqas il-formazzjoni ta ' plażma sħaba , b'hekk jiżdied l- effettiv użu ta' il-laser . Nitroġenu at a ċert temperatura can be a chemical reaction with aluminum alloy, and carbon steel, producing nitride, li will improve the weld brittleness, WeChat public number: welder, ebusija reduction, the mechanical properties of welded joints will have a greater adverse effect, so do not recommend the use of nitrogen on aluminum alloy and carbon steel weld protection!
Nitroġenu u stainless azzar kimika reazzjoni jipproduċi nitrid jista ' itejjeb is-saħħa ta' il- weld konġunt , li se ikun li jwassal lill- mekkanika proprjetajiet ta ' il weld , hekk il iwweldjar ta ' stainless azzar jista' użu nitroġenu bħala a protettiv gass
Ar's ionization energy is relatively the lowest, the degree of ionization under the action of the laser is high, is not conducive to controlling the formation of the plasma cloud, will have a certain impact on the effective utilization of the laser, but the Ar activity is very low, it is difficult to have a chemical reaction with the common metal, and the Ar cost is not high% 2c in żieda għal id- densità ta ' Ar IS LARGE, IS CONDUCIVE TO THE WELD TOP WELD MOLTEN pool, Can Be aħjar protezzjoni ta ' il - weld molten pool, u can għalhekk be użat AS A konvenzjonali protezzjoni gass .
Huwa għandu l-ogħla jonizzazzjoni enerġija , il jonizzazzjoni grad huwa ħafna baxx taħt l-azzjoni ta ' il- laser , jista' ikun tajjeb kontroll ta ' il- formazzjoni il plażma sħaba , il-laser jista ' ikun ħafna tajjeb effett fuq il- ... metall , WeChat pubbliku numru 3a mikro-welder, u Hu attività huwa ħafna baxx , bażikament ma m'għandux a kimika reazzjoni ma il- metall , huwa a ħafna tajjeb weld protezzjoni gas, but the cost of He is too high, the general mass production of products not be used in the gas, He is usually used for Scientific research or very high value-added products.
Protettiv gass infiħ metodu
Fuq present, hemm hemm żewġ main types of protective gas blowing methods: one is by-axis side blowing of protective gas, and the other is coaxial protective gas.
Kif tagħżel bejn iż- żewġ tipi ta ' blowing huwa a materja ta' komprensivi konsiderazzjoni, u fi ġenerali , huwa rakkomandat biex uża in-naħa daqqa ta ' protettiv gassijiet.
Protettiv gass infiħ metodu għażla prinċipju
L-ewwel ta ' all , it għandu be ċar li l-hekk imsejħa weld huwa "oxidized" is a komuni isem, il - teorija huwa li il- weld u il - ħsara komponenti fil l- arja kimika ċomb għal deterjorazzjoni ta ' il-kwalità ta' il - ... iwweldja / 2c ċertu temperatura u l ossiġnu% 2c nitroġenu, idroġenu % 2c eċċ. in l-arja biex ikollok a kimika reazzjoni.
Biex tipprevjeni l-weldjatura minn li tkun "ossidizzat" is is to reduce or evita il kuntatt ta' tali ta' ħsara komponenti ma il weld metall in the temperatura għolja state, dan temperatura għolja state is mhux biss the molten pool of metal, but from the weld metal is melted until the molten pool is melted until the molten pool of metal solidification and its temperature is reduced to a certain temperature below the kompletament period of time!
Per eżempju
Għal eżempju, in titanium alloy welding, when a temperature above 300 degree can quickly absorb hydrogen, 450 degree degree above can quickly absorb absorb absorb oxygen, and 600 degree above can quickly absorb nitrogen, so the titanium alloy weld in the solidification and the temperature is reduced to 300 degree below the stage of the need for effective protection effect, otherwise, it will be "oxidized".
Id-deskrizzjoni fuq hija mhux diffiċli biex tifhem, blowing in the protective gas not only needs timely protection of the weld pool, but also needs to have been welded just solidified area for protection, so the general use of Figure 1 shown in the side of the axial side of the blowing protective gas, għax of this way protection relative to the coaxial protection in Figure 2 in the protection OF A Usa ' Firxa TA ' PROTEZZJONI% 2C SPEĊJALI IL IL WELD JUST SOLIDIFIED AREA HAS BETTER PROTECTION.
Bypass side blowing for engineering applications, not all products can be used by the way by by side blowing protective gas, for some specific products, can only be used coaxial protective gas, specific needs from the product structure and the form of joints to make a targeted choice!
Għażla ta ' speċifiku protettiv gass li jonfoħ metodu
Dirett linja iwweldjar
Il forma of the weld seam is straight, and the joints can be butt joints, lap joints, fillet joints, or stacked joints, or stacked joints, and this type of product is preferut to use the side-shaft blowing guarding shielding gas.
Planar magħluq grafiku iwweldjar
Il forma of the weld seam of the product is plane circumference, a plane polygonal shape, plane multi-segmented line shape, and other closed figures, the form of joints for butt joints, lap joints, lap joints, overlaps, stacked welded joints, etc., and this type of product is the use of coaxial shielding gas method is ppreferut.
L-għażla ta ' protezzjoni gass direttament taffettwa il- kwalità , effiċjenza, u spiża ta iwweldjar produzzjoni , iżda dovuta id-diversità ta ' iwweldjar materjali, in il attwali iwweldjar proċess, l-għażla ta ' iwweldjar gass huwa ukoll aktar kumpless , int bżonn li tieħu kont il iwweldjar materjal , iwweldjar metodu , iwweldjar pożizzjoni , kif il - rekwiżiti ta ' il weld effett , permezz il weld test biex tagħżel a aktar adattat iwweldjar gass , biex tikseb aħjar iwweldjar riżultati!
