The Effects of Humidity on Cast PA6G during Turning and Milling Machining

Table 3

The effect of humidity on the change of surface roughness.

CNC milling (dry)		CNC milling (humid)
After processing, (µm)	After leaving in a humid environment, (µm)	After processing, (µm)	After leaving in a dry environment, (µm)
2.253	2.589	2.490	2.135
2.742	3.112	3.185	2.993
2.649	2.981	3.620	3.314
2.250	2.453	3.700	3.453
2.142	2.342	2.826	2.486
2.414	2.765	3.233	3.103
2.856	3.231	3.479	3.110
2.920	3.436	3.526	3.203
2.923	3.452	2.246	1.967
2.232	2.564	2.825	2.143
CNC turning (dry)		CNC turning (humid)
After processing, (µm)	After leaving in a humid environment, (µm)	After processing, (µm)	After leaving in a dry environment, (µm)
9.544	10.213	5.764	5.178
1.874	2.025	1.814	1.693
3.186	3.420	2.956	2.760
8.360	8.945	6.296	5.668
2.556	2.799	1.750	1.573
1.878	2.010	2.144	1.929
7.340	7.876	6.423	5.781