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formation chhan leh a chinfel dan welding porosity of stainless steel pipe .

A rilru a buai em em 0     a, a rilru a hah em em bawk a. 2025-04-08 Origin: Hmun

zawhna zawt rawh .

Porosity hi stainless steel pipe welding-a chhiatna awm fo a ni a, chu chu weld-a khur te te angin a lang a, chu chuan pipe tightness leh chakna a nghawng a ni. A hnuaia tarlan te hi stomata awm chhan leh a hmachhawn dan tur sawifiah dan hriatthiam awlsam tak a ni:

1. Pores hi khawi atanga lo chhuak nge?

1.1 Gas awm zat .

Welding laiin a hmin thin metal hian a chhehvel gas (thliah oxygen leh nitrogen ang chi) a hip lut thin.

Shielding gas (argon ang chi) chu a tling tawk lo emaw, a thianghlim tawk lo emaw a nih chuan, heng gas te hi metal a lum chuan a chhuak tlai thei lo va, bubble a siam thei a ni.

1.2 Material a fai lo .

Steel pipe chung lamah oil, tui bawlhhlawh emaw rust emaw a awm a, hydrogen ang chi gas chu temperature sang takah a chhe a, weld-ah a inhmeh tir a ni.

1.3 Welding dik lo .

Current a lian lutuk a, a tlan chak lutuk bawk: molten pool temperature a sang lutuk emaw solidification a rang lutuk emaw a, gas a tlan thei lo bawk.

Wrong angle of welding torch: Protective gas chu thliin a nuai bo a, boruak chu melt pool-ah a lut a.


2. Engtin nge air holes hi kan pumpelh theih ang?

2.1 Thianghlim .

Pipe chunglam atanga oil, rust leh moisture te chu weld hmain sandpaper emaw alcohol emaw hmangin uluk takin silfai thin ang che.

2.2 Control shielding gas .

Argon purity ≥99.99% hman a ni a, flow rate chu 15-20L/min ah a awm reng a ni.

Thlipui na tak karah welding loh tur a ni a, chu chu thli hood hmanga venhim theih a ni.

2.3 Welding parameters siamrem dan tur .

Current tam lutuk loh nan current dik tak (1.2mm welding wire atan 90-120A ang chi) thlang rawh.

Welding speed hi a inang tlang vek a, a rang lutuk lo (8-12cm/min a tha).

2.4 Butt Welding Material tih kha thlang rawh .

Gas lakchhuahna atana pui turin silicon (SI) emaw titanium (TI), ER308LSI ang chi wire hmang la.

Flux-a wire hian solid wire aiin porosity resistance a nei tha zawk.

2.5 Hnathawh thiamna .

Gas chuan molten pool a khuh kim theih nan welding torch leh workpiece inkar angle chu 75° velin dah la.


Porosity hi gas residue leh hnathawh dik loh vang a ni ber. Material tihfai, gas control leh parameters siam that hian porosity nasa takin i tihtlem thei a, welding quality pawh i enfiah thei bawk!


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