A514 GR A thiab A514 GR B yog siab- lub zog, quenched thiab tempered alloy steel daim hlau tsim rau ASTM A514 / A514M tus qauv, feem ntau siv hauv cov qauv siv uas xav tau lub zog siab tshaj plaws - rau - qhov hnyav piv xws li cov cuab yeej siv, cov khoom siv mining {7} thiab cov khoom hnyav. Lub "GR" xaiv cov qib hauv A514 specification.
Qhov txawv tseem ceeb:
Thawj qhov txawv yog qhov tsawg kawg nkaus yield zog raws li phaj thickness. Rau cov phaj siab txog 2.5 nti (63.5mm) tuab, A514 GR A feem ntau muab lub zog tawm los ntawm 100 ksi (690 MPa), thaum A514 GR B muab tib lub zog 100 ksi tawm los. Qhov sib txawv tau pom meej dua thaum xav txog lwm qib - cov khoom siv tshuaj lom neeg thiab cov khoom siv tshwj xeeb tau piav qhia hauv tag nrho ASTM specification. Cov yam ntxwv tseem ceeb yog pom nyob rau hauv cov tshuaj lom neeg muaj pes tsawg leeg, uas yog tsim rau kev vuam tshwj xeeb lossis kev ua cov yam ntxwv. GR A, piv txwv li, muaj qhov sib npaug sib npaug ntawm cov khoom sib txawv xws li Manganese, Silicon, Chromium, thiab Molybdenum piv rau GR B. Cov kev sib txawv ntawm cov khoom no tuaj yeem cuam tshuam rau hardenability, carbon sib npaug (Ceq), thiab weldability ntawm txhua qib.
Yog li ntawd, thaum ob daim hlau qhia ultra- siab zog thiab zoo heev, kev xaiv ntawm GR A thiab GR B yog ib qho kev txiav txim siab engineering tshwj xeeb. Qhov kev xaiv yog coj los ntawm kev sib xyaw ua ke ntawm weldability, formability, thiab meej los ntawm -thickness lub zog xav tau rau daim ntawv thov. Fabrication, tshwj xeeb tshaj yog vuam, rau ob qib xav tau cov txheej txheem nruj: kev siv qis - hydrogen, siab - lub zog consumables, tswj preheat thiab interpass kub, thiab feem ntau post-weld tshav kub kev kho mob kom txo tau txoj kev pheej hmoo ntawm hydrogen- induced cracking thiab khaws cia lub hauv paus khoom.
Tshuaj muaj pes tsawg leeg ntawm A514 GR A
|
Element |
Kev sib xyaw (%) |
|---|---|
|
Cov pa roj carbon (C) |
0.15-0.21 |
|
Manganese (Mn) |
0.80-1.10 |
|
Phosphorus (P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Silicon (Si) |
0.40-0.80 |
|
Chromium (Cr) |
0.50-0.80 |
|
Molybdenum (hli) |
0.18-0.28 |
|
Zirconium (Zr) |
0.05-0.15 |
|
Boron (B) |
0.0025 max |
Tshuaj muaj pes tsawg leeg ntawm A514 GR B
|
Element |
Kev sib xyaw (%) |
|---|---|
|
Cov pa roj carbon (C) |
0.15-0.21 |
|
Manganese (Mn) |
0.80-1.10 |
|
Phosphorus (P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Silicon (Si) |
0.40-0.80 |
|
Chromium (Cr) |
0.50-0.80 |
|
Molybdenum (hli) |
0.18-0.28 |
|
Zirconium (Zr) |
0.05-0.15 |
|
Boron (B) |
0.0025 max |
Mechanical Properties ntawm A514 GR A
|
Thickness (hli) |
Yield zog (min, ksi) |
Tensile zog (ksi) |
Elongation (min,%) |
|---|---|---|---|
|
Mus txog 2.5 |
100 |
110-130 |
18 |
|
2.5 rau 6 |
90 |
100-130 |
16 |
Mechanical Properties ntawm A514 GR B
|
Thickness (hli) |
Yield zog (min, ksi) |
Tensile zog (ksi) |
Elongation (min,%) |
|---|---|---|---|
|
Mus txog 2.5 |
100 |
110-130 |
18 |
|
2.5 rau 6 |
90 |
100-130 |
16 |
