1. Cov ntsiab lus sib tw hauv Vuam Huab Cua Hlau
PATINE tsim kev cuam tshuam cuam tshuam: Welds yuav tsis txhim kho cov hluav taws xob sib txuam
Hydrogen Cracking Txaus: Kev paub ntau dua li cov hlau me me
Cov chaw kub kub-cuam tshuam (Haz) cov khoom: Muaj peev xwm txo qis
Txuam corrosion tsis kam: Txhim Kho Weld Hlau Wirers Zoo Ib yam li hauv paus Hlau
2. Pom zoo vuam cov txheej txheem
| Kev ua | Haum rau | Sau ntawv |
|---|---|---|
| Smig (thaiv cov hlau arc) | Teb / Khw | Feem ntau, siv cov hluav taws xob tsawg-hydrogen) |
| GMAW (MIG) | Khw / Ntau Lawm | Zoo tshaj plaws rau automation |
| FCAW (Flux-cored) | Teb / Hnyav ntu | Tus Nqi Tshaj Tawm Ntau Dua |
| Pom (submerged arc) | Tuab daim hlau | Yuav tsum xaiv cov kev xaiv flux kom zoo |
3. Muab tub xaiv
Aws specifications:
SMAW: E7018-W (piv txwv li, Lincoln LH-D78W)
GMAW / FCAW: ER70s-3W lossis E71T-1W
Pom: Em12K + Nruab Nrab Flux
Qhov tseem ceeb yuav tsum muaj:
Yuav tsum phim cov kab mob huab cua
Hydrogen (<5ml/100g)
Zoo sib xws CTE (coefficient ntawm thermal expansion)
4. Pre-weld npaj
Kev sib koom ua:
60° V-groove for plates >10 hli
Hauv paus ntsej muag 1.5-2mm
Cag Hack 2-3mm
Ntxuav:
Tshem cov zeb nplai 25 hli ob sab ntawm kev sib koom tes
Degrease Nrog Acetone
Preheating:
<20mm thickness: 50-100 degree
0-40 hli: 100-150 degree
>40 hli: 150-200 degree
5. VUAM YAM TSIS TAU
| Tuab (mm) | Kis tau | Tam sim no (a) | Voltage (v) | Ceev (hli / min) |
|---|---|---|---|---|
| Tsawg dua los yog sib npaug rau 6 | 1 | 90-120 | 18-20 | 300-400 |
| 6-12 | 2-3 | 120-160 | 20-22 | 250-350 |
| 12-25 | 3-5 | 160-220 | 22-26 | 200-300 |
| >25 | Ntau tus | 200-280 | 24-28 | 150-250 |
