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Full text of "Metallurgy Of Cast Iron"

336
METALLURGY   OF   CAST   IRON.
fourth and last heat of a continuous remelt of the original charcoal pig used in heat No. 9. The metal from heat No. 12 had each side poured into sand and chill moulds, and the analyses at H, I, J, and K, Table 73, show the chemical changes made by the twelfth heat. Heats 13 and 15 were casts in which the same grade of
TABLE 74.—CHEMICAL ANALYSIS OF CHILLED AND GRAY IRON RE-MELTS, POURED INTO SAND MOLDS BY HEATS SHOWN IN TABLE 72,  PAGE 334.
Description of iron and heat No.	ic ,2 ' It'i cC cd £ rj be c	d   H      • ill	Analysis of gray blocks	bi	.£•2 rt ?3 ^	^ § <w	"tr ^ ^> ^	- ^ 5 513 °	Analysis of gray blocks	3^3 ^ d H   . Ill
								-d		
Classification of re-melts.	Sand i re-mel	11	|3 CO H	__ cy .73 a u S	||	Chill i re-mel	CO u "o	•"^^3 cfl OS'S	Sand T re-mel	t-i ^ sl
Analysis Letter.	A 2	B2	C2	D2	E2	F2	G2	II 2	12	J2
Total Carbon...	4-30	4-30	4-30	4-30	2.94	3-r5	3-55	• 3-f'0	3.SS	3-95
Graphitic C'rb'n	2.42	2.68	2.20	3-20	2.41-	2-73	2.63	2.05	2.15	2.40
Combined Carbon .........	1.98	1.62	2. TO	1. 10	-53	.42	.92	i-55	T-73	1-55
Silicon ............	•63	.68	•75	.87	•55	.69	J-55	i-57	1.29	1-39
Sulphur ...........	.04	.035	.04	.035	.045	.048	.030	• 030	.042	.040
Manganese..	•53	•54	.48	. .62	1.23	1.32	•133	• 135	.126	.130
Phosphorus .....	.274	.   .285	.283	.241	1.07	1,07	•343	•330	.364	• 350
Spig was used as in heat No. 9 as a check to learn if ^similar results would be obtained by further experiments, and heats 14 and 16 are used as a check on heat No. 10, in the same manner.
The analyses given under A, B, and C, Table 73, for heats Nos. 9 and 10 will also serve for heats 13 to 16. When running the sixteenth heat the sand and chill roll metal was run into sand moulds, as described for heat No. 10. Heat No. 17 is a high manganese and phosphorus pig, which was run into sand and chill moulds to make rolls that were used for heat No. 18,No. 10 and melted down in heat No. 11 is also shown at A2 and 132, Table 74, page 336.Hard.	Hard.	Hard.	Hard.	Hard.	Hard.	Hard.