Steel Forming and Heat Treating Handbook - Antonio Gorni On Line
Steel Forming and Heat Treating Handbook - Antonio Gorni On Line
Steel Forming and Heat Treating Handbook - Antonio Gorni On Line
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<strong>Gorni</strong><br />
<strong>Steel</strong> <strong>Forming</strong> <strong>and</strong> <strong>Heat</strong> <strong>Treating</strong> H<strong>and</strong>book<br />
- This formula is a modification of Kirkaldy’s Bs equation.<br />
- It assumes that Si amount is constant <strong>and</strong> equal to 0.25%, as most low alloy steels exhibit a content of this<br />
alloy element in this order of magnitude.<br />
- Reliable chemical composition range: 0.20-0.41% C, 0.31-1.01% Mn, 0.10-0.28% Si, 0.00-0.44% Mo, 0.02-<br />
0.98% Cr, 0.02-3.04% Ni, 0.05-0.11% Cu.<br />
Source: LI, M. et al. A Computational Model for the Prediction of <strong>Steel</strong> Hardenability. Metallurgical <strong>and</strong> Materials<br />
Transactions B, 29:6, June 1998, 661-672.<br />
30<br />
. Steven & Haynes<br />
B s<br />
830 270 C 90 Mn 37 Ni 70 Cr 83 Mo<br />
B<br />
50<br />
B s<br />
50<br />
B<br />
100<br />
B s<br />
120<br />
Notation:<br />
Bs: Bainite Start Temperature [°C]<br />
Alloy Amount: [weight %]<br />
Bx: Temperature Required for the Formation of x% of Bainite [°C]<br />
Observations:<br />
- Reliable chemical composition range: 0.10-0.55% C, 0.2-1.7% Mn, 0.0-1.0% Mo, 0.0-3.5% Cr, 0.0-5.0% Ni.<br />
Source: STEVEN, W. & HAYNES, A.G. The Temperature of Formation of Martensite <strong>and</strong> Bainite in Low Alloy <strong>Steel</strong>s.<br />
Journal of the Iron <strong>and</strong> <strong>Steel</strong> Institute, 183, 1956, 349-359.<br />
. Suehiro
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