Sliding characteristics / Workability

Sliding characteristics

Having a coating layer with high surface hardness and smoothness, ZAM® exhibits superior sliding characteristics.

Dynamic friction coefficients of various types of coated steel

Sliding test conditions

Sample size	0.8 mm (thickness) x 30 mm(width) x 300 mm (length)
Press oil	Z5 (Idemitsu Kosan)
Pressing pressure	0.72、1.45、2.90N/mm2
Pressing force	1、2、4kN
Pressing area	46×30mm2
Withdrawal rate	1000mm/min
Mold surface roughness	#1000 (Polishing for each session)
Mold material	SKD11

Workability

ZAM® has better drawing characteristics than other types of coated steel sheets.

Limiting drawing ratios (LDRs) of various types of coated steel sheets

Conditions for deep drawing test

Diameter of punch (Dp)	40mm
Diameter of die (Dd)	42mm
Shoulder radius of punch (Rp)	5mm
Shoulder radius of die (Rd)	5mm
Stroke speed (Vp)	60mm/min
Press forming oil	Z5 (Idemitsu Kosan)

Samples

	Coating mass	Material	Post-treatment
ZAM®	70/70 g/m2	Deep drawing quality	ZC treatment
Galvanized steel	60/60 g/m2	Deep drawing quality	ZC treatment
Galvanealed steel	45/45 g/m2	Deep drawing quality	ZC treatment