The Iron and steel magazine . ,SS ^^>*^&^::-r#^^ ?*y !&»- Fig. 4. Magnified 200 diameters. Fig. 5. Magnified 2,000 diameters Brittleness and Blisters in Thin Steel Sheets s°1/ along the Lines where the metal has been cut. Now in the thinsheel the same thing will happen, bu1 in tins case the area ofthe ghost Lines is enormously increased owing to the extendedinfluence of rolling, and even the manganese sulphide, whichis usually considered harmless, becomes rolled out to such anextent that its influence in a thin sheet can no longer be regardedas negligible. Fig. 7 shows the appearance of the
The Iron and steel magazine . ,SS ^^>*^&^::-r#^^ ?*y !&»- Fig. 4. Magnified 200 diameters. Fig. 5. Magnified 2,000 diameters Brittleness and Blisters in Thin Steel Sheets s°1/ along the Lines where the metal has been cut. Now in the thinsheel the same thing will happen, bu1 in tins case the area ofthe ghost Lines is enormously increased owing to the extendedinfluence of rolling, and even the manganese sulphide, whichis usually considered harmless, becomes rolled out to such anextent that its influence in a thin sheet can no longer be regardedas negligible. Fig. 7 shows the appearance of the manganese sulphideinclusions in the section of a sheet. Evidently, then, a thin sheet, rolled from a bar showingghosts, will consist of laminae of ductile steel separated by laminaeof less ductile and highly phosphoric steel, together with laminaeof manganese sulphide. When such a sheet is subject to bend-ing, the ductile material tends to slip over the less ductilematerial, and the sheet fractures, or is brittle. If the defectis due to this cause, the brittleness should not be uniformt
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Keywords: ., bookcentury1800, bookdecade1890, bookidironsteel, booksubjectiron
