Molybdenum ma Chromium Molybdenum Heat Resistant Steel Welding Electrode
R717
AWS A5.5 E9015-B9
Faʻamatalaga: O le R717 o se eletise uʻamea vevela faʻatasi ma se faʻapipiʻi sodium maualalo-hydrogen e aofia ai le 9% Cr - 1% Mo-V-Nb.Fa'aaoga le DCEP (fa'atonu eletise eletise) ma e mafai ona uelo i tulaga uma.Ona o le faʻaopoopoga o se vaega itiiti o Nb ma V, o le uʻamea teuina e sili atu le maualuga o le vevela o le fetolofi.
Talosaga: E faʻaaogaina mo le faʻapipiʻiina o paipa faʻafefeteina ma ulu o pusa vevela ma maualuga, pei ole A213-T91 / A335-P1 (T / P91), A387Cr, 91 ma isi fausaga uʻamea vevela.
Su'ega vaila'au o u'amea u'amea(%):
| C | Mn | Si | Cr | Mo | V | Ni |
| 0.08 ~ 0.13 | ≤1.20 | ≤0.30 | 8.0 ~ 10.5 | 0.85 ~ 1.20 | 0.15 ~ 0.30 | ≤0.80 |
| Nb | Cu | Al | N | S | P |
|
| 0.02 ~ 0.10 | ≤0.25 | ≤0.04 | 0.02 ~ 0.07 | ≤0.01 | ≤0.01 |
|
Fa'aaliga: Mn+Ni＜1.5%
Tulaga fa'ainisinia o u'amea u'amea:
| Su'ega mea | Malosi fa'asa Mpa | Tuuina atu le malosi Mpa | Fa'aumiumi % |
| Fa'amaonia | ≥620 | ≥530 | ≥17 |
Fautuaina le taimi nei:
| u'amea lautele （mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| Uelo Uila （A） | 60 ~ 90 | 90 ~ 120 | 130 ~ 170 | 170 ~ 210 |
Fa'aaliga:
1. E tatau ona tao le electrode mo le 1 itula i le 350 ℃ aʻo leʻi faʻaogaina le faʻaogaina;
2. E taua tele le fa'amamāina o le ele, fua o le suau'u, vai, ma mea leaga i luga o vaega uelo a'o le'i uelo.
3. Preheat le vaega uelo i le 200 ~ 260 ° C ao lei uelo, ma tausia le vevela interpass tutusa;
4. Faʻamalie lemu i le 80 ~ 100 ° C mo le 2 itula pe a maeʻa le uelo;afai e le mafai ona faia togafitiga vevela i se taimi vave, e mafai ona faia togafitiga dehydrogenation i le 350 ° CX 2h.
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