. Railway mechanical engineer . ^ ^■^.-* -^ ^•^o\ jt\p 5-., 5^ _; *.« ■ ^•.^ <I.^»^ *\^ •■^ •^.•.* •^.s^ -.*. ^\> ^■^ IS- /6 ^r. Fig. 9—Limits of Zones Det ned by Hardne metal of any zone throughout the tire, as would be metal in zone D .shows the effect of the heating of thetire during welding and it has an effect of a more or draw (by draw is meant a heating to and coolingfrom a temperature which is below the critical range). This AND MICRO-STRUCTURE Photorrricrographs, Figs 10 to 30, show the structure of thetest pieces 3-16 in. from the fracture, and
. Railway mechanical engineer . ^ ^■^.-* -^ ^•^o\ jt\p 5-., 5^ _; *.« ■ ^•.^ <I.^»^ *\^ •■^ •^.•.* •^.s^ -.*. ^\> ^■^ IS- /6 ^r. Fig. 9—Limits of Zones Det ned by Hardne metal of any zone throughout the tire, as would be metal in zone D .shows the effect of the heating of thetire during welding and it has an effect of a more or draw (by draw is meant a heating to and coolingfrom a temperature which is below the critical range). This AND MICRO-STRUCTURE Photorrricrographs, Figs 10 to 30, show the structure of thetest pieces 3-16 in. from the fracture, and of several spotslocated and numbered in Fig. 5. One series was taken at430 diameters and another at 1,200 diameters. It is difficult. Zone Test pieces Original 1. 23 E 4, 7, 13, 15 C & D 5, 6, 9, 14 Tensilestrength Elasticlimit Elongation Reductionof area HardnessBrinell Scleroscope Modulus ofElasticity Modulus ofResilience 125,,800 per per cent per per per cent 263 43298 49245 40 28,950,00029,990,00029,950,000 metal may, therefor
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
