. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ew Bessemer railswhich have displayed transverse fissures at ages rangingfrom 20 to .30 years belong to this class. Few open- hearth rails of great age are in sen-ice or so situated as tofurnish information upon this feature. There has come to notice one notable exception, fur-nished by some rails of 100 pounds weight rolled by theBethlehem Steel Co. in the month of June, 1909. Theserails have been in use in the tracks of the PennsylvaniaRailroad for a period approaching 14 years. They haveoc
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ew Bessemer railswhich have displayed transverse fissures at ages rangingfrom 20 to .30 years belong to this class. Few open- hearth rails of great age are in sen-ice or so situated as tofurnish information upon this feature. There has come to notice one notable exception, fur-nished by some rails of 100 pounds weight rolled by theBethlehem Steel Co. in the month of June, 1909. Theserails have been in use in the tracks of the PennsylvaniaRailroad for a period approaching 14 years. They haveoccupied a situation of exceptionally good maiiitenence,held by screw spikes, tie plated, supported on black gumor yellow pine or oak ties resting on stone ballast, andcarried on a concrete base, but where heavy traffic prevails. Rails of Bessemer steel which have displayed transversefissures are few in numbers when compared with thosewhich have occurred in open-hearth product. Structurally,examples of Bessemer rails have looked decidedly interiorto open-hearth rails. Preference has been given open-. Fig. 2—Transverse Fissure Advanced Stage of Development hearth metal by engineers; therefore, when it came to aconsideration of transverse fissures, their comparativelyabsence in Bessemer rails seemed to throw an additionalcloak of mystery over their formation. The preceding remarks have related to the formationand display of transverse fissures as they have occurredin the track. Transverse fissures have also been producedex|>erimentally by subjecting rails to treatment analogousto the cold-rolling action of wheels. The result was ac-complished l)y repeated alternate overstraining the raillongitudinally. The facilities of the gagging press weremade use of in ap])lying the necessary stresses. Half-length rails were used, applying gagging blows atshort intervals along the length of the head, then reversingthe bend and gagging the base in the same manner. Thisalternation of reverse
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
