. Cast iron for locomotive-cylinder . . . .675 . 670670. 360,370,740,760 Per ct. . Miles 93 00093 00093 00093 00020 905 12 484 17 50417 504 1516 52539935 6718 10 00010 00012 00012 00032 00032 000 3. METALLOGRAPHIC EXAMINATION Specimens from packing rings made by B (No. 5, 93 000 miles),A (No. 48, 28 988 miles; No. 63, 12 484 miles), D (No. 42, 17 504miles), G (No. 62, 6718 miles), and E (No. 50, 1516 miles) wereexamined microscopically. The samples were polished and examined microscopically bothbefore a
. Cast iron for locomotive-cylinder . . . .675 . 670670. 360,370,740,760 Per ct. . Miles 93 00093 00093 00093 00020 905 12 484 17 50417 504 1516 52539935 6718 10 00010 00012 00012 00032 00032 000 3. METALLOGRAPHIC EXAMINATION Specimens from packing rings made by B (No. 5, 93 000 miles),A (No. 48, 28 988 miles; No. 63, 12 484 miles), D (No. 42, 17 504miles), G (No. 62, 6718 miles), and E (No. 50, 1516 miles) wereexamined microscopically. The samples were polished and examined microscopically bothbefore and after etching. Heat tinting was found to be verysuitable for revealing the irregularly shaped masses of phosphideeutectic and at the same time allowing the black flakes of graphiteto stand out clearly. Micrographs were taken only of typical Bureau of Standards Technologic Paper No. 172 : N ^3^IPS IIP ]v*-S£N|^4^ JkjE^fj b\ii%:4$ BBf Fig. 3.—Specimen No. 5Manufacturer B (93 000 miles service). Etched, with 2 per cent nitric acid. Xioo. Fig. 4.—Specimen No. 50Manufacturer E (1516 miles service). Etched with 2 per cent nitric acid. Xioo Bureau of Standards Technologic Paper No. 172
Size: 1679px × 1489px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidcastironforl, bookyear1920
