Characterization of Tool Wear in High-Speed Milling of Hardened Powder Metallurgical Steels

Table 3

Boundary curves for the case C+.

Case	Area	Condition
		𝐹	𝐶
		𝐹≥0,; 𝐹≥𝑅^2𝑙−𝐶^2−𝑓𝑧	𝐶≥𝑅𝑙^−𝑎en, 𝐶≥𝑅^2𝑙−(𝐹+𝑓𝑧)^2
		−𝑓^𝑧2≤𝐹≤0	𝐶≥𝑅^2𝑙−(𝐹+𝑓𝑧)^2,; 𝐶≥𝑅^20−𝑁^2−𝑎en, 𝐶≥𝑅𝑙−𝑎en
C+		𝐹≥−𝑓^𝑧2	𝐶≤𝑅𝑙−𝑎en, 𝐶≥𝑅^20−𝑁^2−𝑎en,; 𝐹^22𝑎en−𝑎^en2≤𝐶≤−𝑎2^en+2𝐹𝑎^2en+𝑓^𝑧𝑎en𝐹+𝑓^2𝑧2𝑎en
		𝐹≥−𝑓^𝑧2; 𝐹≤𝑅^2𝑙−𝐶^2−𝑓𝑧	𝑅𝑙−𝑎en≤𝐶≤𝑅^2𝑙−(𝐹+𝑓𝑧)^2,; 𝐶≥𝑅^20−𝑁^2−𝑎en
		𝐹≥−𝑓^𝑧2	−𝑎^en2+2𝐹𝑎^2en+𝑓^𝑧𝑎en𝐹+𝑓^2𝑧2𝑎en≤𝐶≤𝑅𝑙−𝑎en
		𝐹≥0,; 𝐹≥𝑅^2𝑙−𝐶^2−𝑓𝑧	𝐶≤𝑎en−𝑅𝑙, 𝐶≤𝑎en−𝑅^20−𝑁^2
		−𝑓^𝑧2≤𝐹≤0	𝐶≤−𝑅^2𝑙−(𝐹+𝑓𝑧)^2,; 𝐶≤𝑎en−𝑅^20−𝑁^2, 𝐶≤𝑎en−𝑟𝑛
C−		𝐹≥−𝑓^𝑧2	𝐶≥𝑎𝑒n−𝑅𝑙, 𝐶≤𝑎en−𝑅^20−𝑁^2,; 𝑎en2−2𝐹𝑎^2en−𝑓^𝑧𝑎en𝐹−𝑓^2𝑧2𝑎en≤𝐶≤𝑎^en2−2𝐹𝑎^2en
		𝐹≥−𝑓^𝑧2; 𝐹≤𝑅^2𝑙−𝐶^2−𝑓𝑧	−𝑅^2𝑙−(𝐹+𝑓𝑧)^2≤𝐶≤𝑎en−𝑅𝑙,; 𝐶≤𝑎en−𝑅^20−𝑁^2
		𝐹≥−𝑓^𝑧2	𝑎en−𝑅𝑙≤𝐶≤𝑎^en2−2𝐹𝑎^2en−𝑓^𝑧𝑎en𝐹−𝑓^2z2𝑎en