Mechanical Characterization and Machinability Behavior of Annealed AISI D6 Cold Working Steel

Table 6

Estimated effects and coefficients for surface roughness (coded units).

Term	Effect	Coef.	SE coef.
Constant		2.6387	0.1432	18.43	0.000
	−0.4175	−0.2087	0.1432	−1.46	0.205
	0.6225	0.3113	0.1432	2.17	0.082
	1.3425	0.6713	0.1432	4.69	0.005
	0.8000	0.4000	0.1432	2.79	0.038
	−0.3325	−0.1662	0.1432	−1.16	0.298
	−0.2775	−0.1388	0.1432	−0.97	0.377
	0.1550	0.0775	0.1432	0.54	0.612
	−1.5675	−0.7838	0.1432	−5.47	0.003
	0.0250	0.0125	0.1432	0.09	0.934
	0.7250	0.3625	0.1432	2.53	0.052

, PRESS = 16.7949, and -Sq = 93.80%.
-Sq (pred.) = 36.47%, -Sq (adj.) = 81.39%.