A387 Qib 11 Chav Kawm 2 hais txog cov ntaub ntawv
ASTM A387 Qib 11 Chav Kawm 2yog tib yam chromium-molybdenum alloy muaj pes tsawg leeg tab sis nkag mus rau hauv qhov zoo li qub thiab tempered (los yog quenched thiab tempered) kev kho cua sov. Qhov no muab siab dua li - xa lub zog thiab kev ua kom zoo dua microstructure, ua rau nws tsim nyog rau cov ntawv thov uas qhov kawg PWHT los ntawm cov fabricator yog impractical los yog qhov siab dua cov cuab yeej cuab tam yog xav tau rau cov khoom tiav.
ASTM A387 Qib 11 Chav Kawm 2 Tshuaj Chemical (%)
| Qib / Khoom siv | C | Mn | Si | P (max) | S (max) | Cr | Mo |
|---|---|---|---|---|---|---|---|
| A387 Qib 11 Chav Kawm 2 (A387 Gr11 Cl2) | 0.05–0.17 | 0.40–0.65 | 0.15–0.40 | 0.035 | 0.035 | 1.00–1.50 | 0.45–0.65 |
Cov ntaub ntawv tseem ceeb ntawm alloy:
Chromium (Cr): 1.00–1.50% → txhim kho oxidation & corrosion kuj
Molybdenum (Mo): 0.45-0.65% → txhim khu kev nkag siab & hydrogen tsis kam
ASTM A387 Qib 11 Chav Kawm 2 Mechanical Properties
| Qib / Khoom siv | Tensile zog | Yield zog (min) | Elongation (min) |
|---|---|---|---|
| MPa | MPa | % | |
| A387 Qib 11 Chav Kawm 2 (A387 Gr11 Cl2) | 515-690 MPa | Ntau dua lossis sib npaug li 310 MPa | Ntau dua lossis sib npaug li 18% |
Piv nrog rau Chav Kawm 1 (415–585 MPa tensile / 240 MPa tawm los),
Chav Kawm 2 muaj lub zog ntau dua, ua rau nws tsim nyog rau kev xav tau ntau dua thiab qhov kub thiab txias.
Impact Test
| Hom kev xeem | Yam yuav tsum tau muaj |
|---|---|
| Charpy V-Qhov cuam tshuam | Raws li tau teev tseg los ntawm qhov project |
| Kev ntsuas kub | -20℃/ −40℃/ −60℃(yeem) |
| Txuj | ASTM / ASME / EN |
Thaum tshav kub kub kho mob
| Yam khoom | Kev xav tau |
|---|---|
| Kev Xa Khoom | Normalized & Tempered (N + T) |
| Yam tsawg kawg nkaus Tempering kub | Ntau dua lossis sib npaug rau 620℃(1150℃F) |
| Kev kho mob xaiv tau | Q+T, HIC, PWHT |
ASTM A387 Qib 11 Chav Kawm 2 Sib npaug Steel Qib
| Txuj | Qib sib npaug |
|---|---|
| ASME | SA387 Qib 11 Chav Kawm 2 |
| Tuam Tshoj (GB) | 14Cr1MoR |
| DIN / EN | 10CrMo9-10 |
Cov cuab yeej cuab tam no tso cai rau cov hlau kom muaj kev nyab xeeb nrog kev kub siab, thermal stress, thiab cyclic loading, ua rau nws tsim nyog rau cov khoom siv siab.
1. Cov xwm txheej "Class 2" cuam tshuam li cas rau cov txheej txheem vuam rau A387 Qib 11?
Lo lus nug no tshawb txog qhov ua tau zoo ntawm kev siv cov khoom siv pre-tempered Class 2, tsom rau cov kev hloov kho tshwj xeeb uas xav tau rau preheat, interpass kub, thiab Post-Weld Heat Treatment (PWHT) piv rau Chav Kawm 1.
2. Dab tsi yog qhov tsis zoo ntawm kev qhia A387 Qib 11 Chav Kawm 2 dhau Chav Kawm 1?
Cov lus nug no tshawb xyuas qhov kev lag luam muaj peev xwm -offs, xws li tus nqi siab dua, tsis yooj yim rau kev tsim kub tom qab, lossis kev pheej hmoo ntawm cov khoom puas tsuaj yog tias tsis raug PWHT raug siv rau cov cua sov uas twb muaj lawm - phaj kho.
3. Hauv daim ntawv thov tshwj xeeb twg yog A387 Qib 11 Chav Kawm 2 qhov yuav tsum tau ua lossis kev xaiv uas nyiam?
Lo lus nug no nrhiav kev txheeb xyuas cov xwm txheej engineering uas qhov siab dua li - xa lub zog thiab ua ntej - kho microstructure ntawm Chav Kawm 2 muab qhov txiaj ntsig tseem ceeb, xws li hauv kev kho cov phiaj xwm lossis rau cov khoom siv uas lub nkoj puv PWHT ua tsis tau.
4. Yuav tsum tswj hwm dab tsi thaum lub sij hawm PWHT ntawm cov khoom siv hauv chav kawm 2 los tiv thaiv kev kub ntxhov?
Cov lus nug no hais txog qhov kev pheej hmoo tseem ceeb: ua kom ntseeg tau tias qhov yuav tsum tau tshaj tawm -weld stress relief tsis txo qis cov txiaj ntsig thiab tensile lub zog ntawm lub hauv paus hlau hauv qab qhov tsawg kawg nkaus qhov tseem ceeb rau Chav Kawm 2.
5. Qhov cuam tshuam rau qhov hnyav ntawm Chav Kawm 2 piv rau Chav Kawm 1 li cas tom qab tsim kom raug?
Cov lus nug no sib piv cov kev pabcuam zaum kawg ntawm ob chav kawm, tshuaj xyuas seb cov kev tsim khoom sib txawv ua rau muaj qhov sib txawv tseem ceeb hauv kev puas tsuaj ntawm kev ua haujlwm kub.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
