Study on the Microstructure of Vanadium-Modified Tungsten High-Speed Steel-Coded SAE-AISI T1 Steel

Table 9

Secondary hardening temperature and hardness values of investigating steels.

Designation	Austenitization temperature
	1100°C		1150°C		1200°C		1250°C
			T	H	T	H	T	H
Standard T1 high-speed tool steel
1V-18W	525	61	525	62	550	64	550	65
Vanadium-modified T1 high-speed tool steel
2V-13W	525	60	525	62	525	63	525	64
3V-8W	525	60	525	61	550	62	525	63
4V-3W	525	59	525	61	525	62	550	63
Vanadium with extra carbon-modified T1 high-speed tool steel
2V-13W–HC	525	60	525	64	525	65	550	66
3V-8W-HC	525	63	525	64	550	65	550	67
4V-3W-HC	525	64	550	65	525	66	550	67

T: tempering temperature; H: hardness value.