. Railway age . N?2. N? 3. N?4. ^^p::^^ Diagram Illustrating Grain Structure of Schoen Steel Wheel. There are two weli-dellned zones In the rim of the Schoen wheel,that are evidently due lo the rulllng. One Is at a depth of i, the other n In. IkIow the surface of the tread. This Is bestIllustrated by the acconi|)auying diagram of ihc microstruclure inthe Sohoen wheel, In which the four strips and the location of themlcropholographs are niughly Indicated. Strip No. 1 shows a very line grain at the surface with carbonwell below per cent. This structure runs down for ntiout /;, in., w

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. Railway age . N?2. N? 3. N?4. ^^p::^^ Diagram Illustrating Grain Structure of Schoen Steel Wheel. There are two weli-dellned zones In the rim of the Schoen wheel,that are evidently due lo the rulllng. One Is at a depth of i, the other n In. IkIow the surface of the tread. This Is bestIllustrated by the acconi|)auying diagram of ihc microstruclure inthe Sohoen wheel, In which the four strips and the location of themlcropholographs are niughly Indicated. Strip No. 1 shows a very line grain at the surface with carbonwell below per cent. This structure runs down for ntiout /;, in., where there beginK a gradual increase of ibe grain sizeuntil the normal dlmenxionii are reacbeelowthe lop of the flange. The flrrt /,, In. lii formed of a very floemixture of aljout equal proportlonH of ferrlte and pearliie. andbelow thlM the ferrlte gradually dli>api>earH and the grains increaiieIn Bize. At a depth of /,, In. the ferrlte appears &S a dlscoatinuoustend or envelope around t

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Keywords: ., bookcentury1800, bookdecade1870, bookidrailwayage44, bookyear1870