Txawm hais tias ob qho tib si Astm A588 Qib B koom nrog tib tsev neeg tsis sib thooj, muaj ntau yam khoom siv tshuaj sib txawv, cov kws coj cwj pwm, thiab cov ntaub ntawv.
1. Tshuaj lom neeg sib xyaw
Lub ntsiab sib txawv ntawm Astm A588 qib A thiab qib kawm nyob rau hauv lawv cov kev sib piv, tshwj xeeb tooj liab (CU), thiab Nickel (NI) cov ntsiab lus.
| Lub ntsiab | ASTM A588 Qib A (%) | ASTM A588 qib B (%) |
|---|---|---|
| Carbon (c) | Tsawg dua los yog sib npaug rau 0.19 | Tsawg dua los yog sib npaug rau 0.20 |
| Manganese (mn) | 0.80–1.25 | 0.75–1.35 |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.04 | Tsawg dua los yog sib npaug rau 0.04 |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.05 | Tsawg dua los yog sib npaug rau 0.05 |
| Silicon (si) | 0.15–0.50 | 0.15–0.50 |
| Tooj Liab (Cu) | 0.20–0.40 | 0.25–0.40 |
| Npib tsib caug (ni) | Tsawg dua los yog sib npaug rau 0.65 | Tsawg dua los yog sib npaug rau 0.50 |
| Chromium (cr) | 0.40–0.70 | 0.40–0.70 |
| Vanadium (V) | 0.01–0.10 | 0.01–0.10 |
Kev soj ntsuam tseem ceeb:
Qib B feem ntau muaj cov ntsiab lus tooj liab du me dua, uas txhim kho nws txoj kev tiv thaiv kom haum atmospheric corrosion thiab txhim kho kev tsim cov oxide patina.
Lub caij no, kawm qib ib tus qib qis dua CU thiab NI me me, muab kev ua kom zoo dua tab sis tsis tshua muaj siab dua saum npoo oxidation nyob rau hauv ntev {}} sij} ntu.
2. Cov Khoom Siv Neeg Kho Tshuab
ASTM A588 Qib B Hlau Phaj Cov Khoom Taw Qhia Zoo dua Cov Kev Ua Haujlwm Zoo Tshaj Nrog Qib A, tshwj xeeb tshaj yog nyob rau hauv cov qoob loo thiab tensile lub zog.
| Cov Cuab Yeej Cuab Yeej Cuab Yeej | ASTM A588 Qib A | ASTM A588 qib b |
|---|---|---|
| Yield zog (MPA, min) | 250–290 | 315 |
| Tensile lub zog (mpa, min) | 400–550 | 460–630 |
| Elongation nyob rau hauv 2 hauv. (%) | 21 | 21 |
Kev tsom xam:
Cov txiaj ntsig ntau dua thiab tensile muaj zog ntawm qib b ua nws zoo tagnrho rau cov choj, loj {1} {{} ntev ru tsev, thiab kev lag luam qauv. Qeb A, thaum me ntsis qis dua hauv lub zog, muaj cov qauv sib txuas tau zoo dua thiab muaj peev xwm rau kev siv teeb pom kev zoo.
3. Dabtsi yog khoov thiab vuam ua haujlwm
Vim hais tias ntawm cov kev ua tiav siab dua, ASTM A588 qib qib A588 qib) ua ntej daim phiaj tuab si saud 20 hli lossis khoov me me radii (r / t <1.5).
Qhov no txo qis kev pheej hmoo ntawm kev tawg thaum sib sau.
| Chaw ua uas tsis tau haus | ASTM A588 Qib A | ASTM A588 qib b |
|---|---|---|
| Pom zoo preheat (rau dabtsi yog khoov) | Tsis tas yuav tsawg dua lossis sib npaug rau 20 hli | 100–150°C for >20 hli |
| Yam tsawg kawg nkaus khoov radius (t= tuab) | 1.0 × t | 1.5 × t |
| Hwj txwv | Zoo tshaj | Zoo heev (preheat rau tuab ntu) |
Xaus:
Qeb yog qhov yooj yim dua los khoov thiab daim ntawv, thaum qib pib B muaj zog dua tab sis me ntsis tsis yoog cov txheej txheem rau cov phiaj thicker.
4. Daim ntawv thov tau
Ob txoj qib yog siv nyob rau hauv cov txheej txheem sab nraum zoov uas ntev -}}}}}} ntu kev xav tau. Txawm li cas los xij, lawv cov ntawv thov tshwj xeeb sib txawv raws li cov kev xav tau ua tau.
| Daim ntawv thov | ASTM A588 Qib A | ASTM A588 qib b |
|---|---|---|
| Raug siv | Cov qauv dav dav thiab cov khoom siv zoo nkauj | Cov txheej txheem hnyav thiab thauj khoom -} Cov ntaub ntawv thov cov kabmob |
| Piv txwv | Lub tsev kws ntxig, cov ntxaij, ntim, duab puab sab nraum zoov | Txuas hniav, kev hloov cov yees, lub tsev plhaub, cov tsheb nqaj hlau |
| Kev tsim qauv yuav tsum tau ua | Lub zog nruab nrab thiab cov nqi Aesthetic | Siab lub zog thiab zoo dua corrosion tsis kam |
| Cua Nraws Lo Nru Kuj | Lub hom phiaj | Zoo tshaj |
5. Ntsiab Lus thiab Xaiv Cov Lus Qhia
| Kev Sib Piv | Qib A | Qib B |
|---|---|---|
| Tooj liab cov ntsiab lus | Qi dua | Siab dua |
| Corrosion Kuj | Zoo | Zoo dua |
| Theem siab nyuaj | Nruab nrab | Siab |
| Muaj meej | Zoo dua | Tswj kav |
| Daim ntawv thov teeb meem | Yooj yim rau cov txheej txheem | Yuav tsum tau muaj cov khoom siv reheat thiab kev puas yog khoov |
| Raug Kev Lag Luam | Kos duab, Kev tsim kho | Cuab Yeej Siv Hluav Taws Xob, Tsheb Thauj Mus Los, Txuas hniav |
Cov Lus Taw Qhia:
Xaiv ASTM A588 Qib A rau cov ntawv thov ua ntej cov ntawv cog lus formability thiab zoo li zoo nkauj panels, façades, lossis toj roob hauv pes qauv.
Xaiv ASTM A588 qib B thaum siab dua qub, thiab cov huab cua ntev dua yog qhov yuav tsum tau ua, xws li hauv cov choj, yees, thiab sab nraum zoov, thiab sab nraum zoov cov qauv steel.
