Statistical Modeling and Optimization of Laser Cladding Stellite 6/WC Composite Coating

Table 7

Variance analysis of the hardness of the cladding layer.

Source	Sum of squares	df	Mean square	F
Model	241300.00	14	17232.22	25.92	<0.0001	Significant
LP	10574.10	1	10574.10	15.87	0.0014
V	3281.54	1	3281.54	4.94	0.0433
CSD	7.76	1	7.76	0.01	0.9155
WCC	212600.00	1	212600.00	319.88	<0.0001
	5540.81	1	5540.81	8.34	0.0119
	3904.83	1	3904.83	5.87	0.0295
	5056.60	1	5056.60	7.61	0.0154
Residual	9306.13	14	664.72
Lack of fit	7986.78	10	798.68	2.42	0.2044	Not significant
Pure error	1319.35	4	329.84
Correlation total	250600	28
R^2	0.9629			Adeq Precision	18.2773