Formation ntease ne ano aduru a ɛyɛ welding porosity of stainless steel pipe .

Porosity yɛ sintɔ a ɛtaa ba wɔ dade a ɛnyɛ den a wɔde fa nsu mu no welding mu, a ɛda adi sɛ ntokuru nketenkete wɔ weld no mu, na ɛka nsu paipu no mu den ne ahoɔden. Nea edidi so yi yɛ ɔkwan a ɛnyɛ den sɛ wɔbɛte ase a wɔfa so kyerɛkyerɛ nea ɛde stomata ba ne sɛnea wodi ho dwuma no mu:

1. Ɛhe na pores fi?

1.1 gas nkaeɛ .

Dade a ɛwosow bere a welding no twetwe mframa a atwa ho ahyia (te sɛ oxygen ne nitrogen wɔ mframa mu).

Sɛ mframa a ɛbɔ ho ban (te sɛ argon) no nnɔɔso anaasɛ ɛho ntew sɛnea ɛsɛ a, wɔrentumi nyi saa mframa yi nkyɛ dodo bere a dade no ayɛ nwini no, na ɛyɛ ahurututu.

1.2 Nneɛma a wɔde yɛ .

Ngo, nsuo a ɛyɛ nkekaeɛ anaa nkannare wɔ dadeɛ afiri no ani, na mframa te sɛ hydrogen sɛe wɔ ɔhyeɛ a ɛkorɔn mu na ɛfra weld no mu.

1.3 Welding a ɛmfata .

Nsu a ɛreworo so no sõ dodo na ahoɔhare no yɛ ntɛmntɛm dodo: ɔhyew a ɛwɔ ɔtare a ayɛ fĩ no mu no yɛ kɛse dodo anaasɛ nea ɛyɛ den no yɛ ntɛmntɛm dodo, na mframa no ntumi nguan.

Welding torch no anim a ɛnteɛ: Mframa no bɔ mframa a ɛbɔ ho ban no kɔ, na mframa no hyɛn ɔtare a ɛreyow no mu.

2. Ɔkwan bɛn so na wobetumi akwati mframa mu ntokuru?

2.1 Ho tew yiye .

Fa sandpaper anaa nsa ho tew ngo, nkannare ne nsu a ɛwɔ paipu no ani yiye ansa na welding ayɛ.

2.2 Mframa a ɛbɔ ho ban a wɔde di dwuma .

Argon a ɛho tew ≥99.99% na wɔde di dwuma na wɔma nsu a ɛsen no kɔ so yɛ 15-20L/min.

Kwati welding wɔ mframa a ano yɛ den mu, a wobetumi de mframa hood abɔ ho ban.

2.3 Yɛ nsakrae wɔ welding parameters mu .

Paw current a ɛfata (te sɛ 90-120A ma 1.2mm welding wire) na woakwati current a ɛboro so.

Welding ahoɔhare yɛ pɛ, ɛnyɛ ntɛmntɛm dodo (8-12cm/min na wɔkamfo kyerɛ).

2.4 Paw butt welding material .

Fa waya a silicon (Si) anaa titanium (TI) wom, te sɛ ER308LSI, di dwuma na aboa ma wɔayi mframa no afi mu.

Flux-cored wire wɔ porosity resistance a eye sen wire a ɛyɛ den.

2.5 Adwumayɛ ho nimdeɛ .

Ma anim a ɛda welding torch ne adwuma no ntam no nkɔ so bɛyɛ 75° na ama mframa no akata ɔtare a ayɛ fĩ no so koraa.

Porosity no titiriw fi gas nkae ne adwumayɛ a ɛmfata. Ɛdenam nneɛma no a wobɛhohoro, gas no so a wubedi so na woayɛ nsakrae wɔ parameters no mu so no, wubetumi atew porosity no so kɛse na woahwɛ ahu sɛ welding no yɛ papa!