Taylor

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Taylor Thornton, ALSTOM Power, Rugby
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Variables

• C, Mn, Si, Ni, Cr, Mo, V, Co, B, N, O..
• Thermomechanical processing of steel
• Welding consumable
• Welding parameters
• Subsequent heat treatment

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0.5 µm
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time t?t
time t
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b
a
time t?t
time t
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2.25Cr1Mo 600 C
M3C
M2X
M23C6
Time / h
1000 h
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3Cr1.5Mo 600 C
M23C6
Time / h
Robson Bhadeshia, 1996
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0.02500
NF616 600 C
M23C6
M
C
3
0.02000
0.01500
0.01000
Laves
M
X
0.00500
2
0.00000
1e-03
1e00
1e03
Time / h
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Cole Bhadeshia, 1999
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GTA weld at 823 K (data from Nippon Steel)
600
500
400
300
200
100
0
20000
30000
40000
Life / hours
Cole Bhadeshia, 1999
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Cole Bhadeshia, 1999
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Components of Creep Strength, 2.25Cr1Mo
iron microstructure
550 C
solid solution
600 C
precipitates
Murugananth Bhadeshia, 2001
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elements in solution
Murugananth Bhadeshia, 2001
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Cool, 1996
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Cool, 1996
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600 C
As-welded
700 C
650 C
Cool, 1996
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