Control of Carbides and Graphite in Cast Irons Type Alloy’s Microstructures for Hot Strip Mills

Table 1

Chemical composition for tested samples.

		Chemical composition (mass %)									Carbide
		C	Cr	V	Nb	Ni	Si	Mo	W	Co
High-speed steel type (HS)	1	2.64	4.58	—	2.94	7.01	3.27	2.21	—	—	MC + M6C + M7C3
	2	2.66	0.99	2.30	2.05	4.98	3.46	—	—	—	MC
	3	2.53	2.88	1.82	1.92	6.06	3.01	—	—	—	MC + M7C3
	4	2.63	2.97	2.08	1.86	5.92	3.35	5.05	—	—	MC + M6C + M7C3
	5	2.73	3.02	3.22	0.97	6.09	3.25	5.15	4.93	—	MC + M6C + M7C3
	6	2.79	3.05	2.95	0.99	6.10	3.23	5.16	—	5.11	MC + M6C + M7C3
	7	2.81	2.97	2.89	0.94	6.45	3.45	5.14	—	—	MC + M6C + M7C3
	8	2.74	3.09	2.10	0.87	5.99	4.46	5.09	—	—	MC + M6C + M7C3
Ni-hard type	1	3.37	1.87	—	—	4.26	0.90	0.55	—	—	M3C
	2	3.25	1.85	0.04	—	4.20	0.94	0.49	—	—	MC + M3C
	3	3.16	1.81	1.86	0.53	4.24	0.93	0.46	—	—	MC + M3C
	4	3.20	1.67	1.93	0.75	4.16	1.19	0.51	—	—	MC + M3C
	5	3.25	1.59	0.96	0.90	4.12	1.24	0.52	—	—	MC + M3C
	6	3.31	1.04	0.76	0.74	4.08	0.84	0.50	—	—	MC + M3C
	7	3.35	1.24	1.94	0.35	4.32	0.88	0.54	—	—	MC + M3C
	8	3.30	1.20	1.94	0.62	4.40	0.88	0.54	—	—	MC + M3C
	9	3.33	0.71	0.97	1.80	4.41	0.90	0.53	—	—	MC + M3C
	10	3.35	0.96	0.97	1.82	4.40	0.96	0.54	—	—	MC + M3C