Effects of Mo in HTLA steels include ().
A. improving hardenability
B. improving tempering stability
C. decreas grain size
D. decreas temper embrittlement
E. 2-3-1
F. 期末
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Welding concerns of HTLA steels include ().
A. hydrogen induced cracking
B. reheat cracking
C. toughness decrease
D. solidification cracking
E. 2-3-2
F. 期末
Contents of () should be cared about.
A. H
B. V
C. Mo
D. S
E. 2-3-2
F. 期末
() could be applied to decrease the possibility of hydrogen induced cracking for HTLA steels welding.
A. preheating
B. postweld heat treatment
C. cleaning the surface of workpiece
D. drying both workpiece and welding material before welding
E. 2-3-2
F. 期末
Which region is next to the partially melted zone? ()
A. coarse grain zone
B. patially refining grain zone
C. refining grain zone
D. base metal
E. 2-1-1
F. 期末
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