Transactions . Quenched in oil from. 900 800c 1 Reheated to * 800 600 Held for-hcmrs not held not held Not Quenched 900° 1100° 620° 720 a H 12 12 D E Fig. 17.—The Impact Test Shows the Influence of Heat TreatmentMore Clearly than the Tensile Test. Properties of Steel of per cent, of Carbon, Eoberts-Austen and Report Alloys Eesearch Committee, Institution of Mechanical Engineers,London, 1904. The steel contained: carbon , silicon , manganese , phos-phorus , sulphur , arsenic dinates Cto F inclusive. The influence of this slow transformationand o
Transactions . Quenched in oil from. 900 800c 1 Reheated to * 800 600 Held for-hcmrs not held not held Not Quenched 900° 1100° 620° 720 a H 12 12 D E Fig. 17.—The Impact Test Shows the Influence of Heat TreatmentMore Clearly than the Tensile Test. Properties of Steel of per cent, of Carbon, Eoberts-Austen and Report Alloys Eesearch Committee, Institution of Mechanical Engineers,London, 1904. The steel contained: carbon , silicon , manganese , phos-phorus , sulphur , arsenic dinates Cto F inclusive. The influence of this slow transformationand of the resultant de-sorbitizing and divorce is shown incompara-bly more clearly by the impact-resistance than by any or all of thetensile properties. 512 SHOCK TESTS OF CAST STEEL. In Figs. 19 and 20 the strong maximum of impact-resistance whenthe tempering temperature reaches the 600°-700° range representsthe sorbitic state, and the sharp decrease at 740°, on rising past Acl,. Not quenched 1100° 020° 720 « 12 12 D E F Quenched in oil from 900 800 Reheated to C00 BOO 900 Held f or-hours Not held Sot held M ABO Fig. 18.—The Impact Test Shows the Influence of Heat TreatmentMore Clearly than the Tensile Test. Properties of Steel of Carbon, Roberts-Austen and Sankey. Sixth Re-port Alloys Research Committee, Institution of Mechanical Engineeis, London,1904. The steel contained: carbon , silicon , manganese , phos-phorus , sulphur , arsenic represents the substitution of pearlite for sorbite. These changes areindeed reflected in the tensile properties but less strikingly. SHOCK TESTS OF CAST STEEL. 513 £ ? a § h £• 7 20,000 JO c — w — 80 40 160 lOJOOO Ccntracti^n of Area
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
