Effect of Heat Input on Microstructure and Hardness Distribution of Laser Welded Si-Al TRIP-Type Steel

Table 1

Chemical composition of the investigated steel, wt.%.

C	Mn	Si	S	P	Nb	Ti	N	Al	Ceq
0.24	1.55	0.87	0.004	0.010	0.030	0.023	0.0028	0.40	0.54

Carbon equivalent C_eq was calculated according to the formula 
C_eq=C+(Mn/6)+(Si/24)+(Ni/40)+(Cr/5)+(Mo/4)[%].