Optimization of the Physical and Mechanical Properties of a Spline Surface Fabricated by High-Speed Cold Roll Beating Based on Taguchi Theory

Table 1

Chemical composition of the 20 steel (mass fraction, %).

Carbon	Silicon	Manganese	Phosphorus	Sulfur	Nickel	Chromium
0.20	0.17–0.37	0.35–0.65	≤0.035	≤0.035	≤0.30	≤0.25