Molybdenum thiab Chromium Molybdenum Thaum tshav kub kub Resistant Steel Vuam Electrode
r717 ua
AWS A5.5 E9015-B9
Nqe lus piav qhia: R717 yog cov hluav taws kub-resistant steel electrode nrog qis-hydrogen sodium txheej uas muaj 9% Cr - 1% Mo-V-Nb.Siv DCEP (cov khoom siv hluav taws xob ncaj qha tam sim no) thiab tuaj yeem txuas rau txhua txoj haujlwm.Vim qhov sib ntxiv ntawm me me ntawm Nb thiab V, cov hlau tso tau zoo heev kub creep kuj.
Daim ntawv thov: Nws yog siv rau vuam superheated raj thiab lub taub hau ntawm high-temperature thiab high-pressure boilers, xws li A213-T91 / A335-P1 (T / P91), A387Cr, 91 thiab lwm yam tshav kub-resistant steel qauv.
Tshuaj muaj pes tsawg leeg ntawm weld hlau (%):
| C | Mn | Si | Cr | Mo | V | Ni |
| 0.08 ~ 0.13 hli | ≤ 1.20 | ≤ 0.30 | 8.0 ~ 10.5 hli | 0.85 ~ 1.20 Nws | 0.15-0.30 Nws | ≤ 0.80 |
| Nb | Cu | Al | N | S | P |
|
| 0.02 ~ 0.10 Nws | ≤ 0.25 | ≤ 0.04 | 0.02 ~ 0.07 hli | ≤ 0.01 | ≤ 0.01 |
|
Daim ntawv ceeb toom: Mn + Ni ＜1.5%
Mechanical zog ntawm weld hlau:
| Cov khoom kuaj | Tensile zog Mpa | Yield zog Mpa | Elongation % |
| lav | ≥620 | ≥530 | ≥17 |
Pom zoo tam sim no:
| Qws txoj kab uas hla (mm) | 2.5 | 3.2 | 4.0 | 5.0 |
| Vuam tam sim no (A) | 60 ~ 90 | 90 ~ 120 hli | 130-170 ib | 170-210 ib |
Daim ntawv ceeb toom:
1. Cov electrode yuav tsum tau ci rau 1 teev ntawm 350 ℃ ua ntej vuam ua haujlwm;
2. Nws yog ib qho tseem ceeb los ntxuav cov xeb, roj nplai, dej, thiab impurities ntawm vuam qhov chaw ua ntej vuam.
3. Preheat qhov vuam ntawm 200 ~ 260 ° C ua ntej welding, thiab tswj qhov sib thooj interpass kub;
4. Maj mam txias rau 80 ~ 100 ° C rau 2 teev tom qab vuam;Yog tias kev kho cua sov tsis tuaj yeem ua tiav sai li sai tau, kev kho dehydrogenation tuaj yeem ua tiav ntawm 350 ° CX 2h.
