Cov Hlau Sib Txuas Qis
J707
GB/T E7015-D2
AWS E10015-D2
Kev piav qhia: J707 yog cov hlau electrode uas muaj zog thiab tsis tshua muaj hlau nrog cov txheej txheem sodium hydrogen tsawg. Siv DCEP (cov electrode tam sim no ncaj qha zoo), thiab tuaj yeem vuam tau txhua qhov chaw. Thaum tsim nyog, cov vuam tuaj yeem raug preheated ua ntej vuam thiab tempered tom qab vuam.
Daim Ntawv Thov: Feem ntau siv rau kev vuam 15MnMoV, 14MnMoVB, 18MnMoNb thiab lwm yam hlau tsis muaj hlau. Cov qauv vuam tuaj yeem ua haujlwm nyob rau hauv qhov xwm txheej ntawm kev vuam lossis tempering (500 ~ 650 ℃).
Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov hlau vuam (%):
|
| C | Mn | Si | Mo | S | P |
| Tau lees paub | ≤0.15 | 1.65 ~ 2.00 | ≤0.60 | 0.25 ~ 0.45 | ≤0.035 | ≤0.040 |
| Tau kuaj xyuas | 0.073 | 1.68 | 0.54 | 0.40 | 0.011 | 0.018 |
Cov khoom siv kho tshuab ntawm cov hlau vuam:
| Khoom sim | Lub zog tensile Mpa | Lub zog tawm los Mpa | Kev ntev % | Tus nqi cuam tshuam (J) -30 ℃ |
| Tau lees paub | ≥690 | ≥590 | ≥15 | ≥27 |
| Tau kuaj xyuas | 720 | 610 | 18.6 | — |
Cov ntsiab lus hydrogen diffusion ntawm cov hlau tso: ≤4.0mL / 100g (txuj ci glycerin)
Kev tshuaj xyuas X-ray: Kuv qib
Pom zoo tam sim no:
| (hli) Txoj kab uas hla ntawm tus pas nrig | 2.5 | 3.2 | 4.0 | 5.0 |
| (Ib) Vuam Tam Sim No | 60 ~ 100 | 100 ~ 140 | 140 ~ 190 | 190 ~ 250 |
Daim Ntawv Ceeb Toom:
1. Lub electrode yuav tsum tau ci rau 1 teev ntawm 350 ~ 380 ℃ ua ntej vuam ua haujlwm;
2. Nws yog ib qho tseem ceeb uas yuav tsum tau ntxuav cov xeb, roj nplai, dej, thiab cov khoom tsis huv ntawm cov khoom vuam ua ntej vuam;
3. Siv txoj kev vuam luv luv thaum vuam. Txoj kev vuam nqaim yog qhov tsim nyog.
