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

Table 2

Parameters of steel sheet laser welding.

Sample number	1	2	3	4	5	6	7
Beam power, kW	7	2	3	4	4	4	4
Welding rate, mm/s	125	41.7	58.3	75.0	83.3	91.7	100
Heat input, kJ/mm	0.056	0.048	0.051	0.053	0.048	0.043	0.037