Heat treatment of carbon tool steels . Plg« I. SAMPLE BAR TOOL STEEL SHOWING THAT CHANGE OP HARDNESS OCCURS AT A DEFINITE BY THE GRAIN OF THE STEEL. Pig. II GAS MUFFLE FURHAOE AND AUXILILIARY APPARATUS WITH HOSKINS ELECTRIC Pig. Ill GAS FIRED OIL TEMPERIHG APPAEIATUS Fig. IV. HIGH SPEED LATHE FOR USE IN TESTIHGSPECIALLY TEMPEREDCARBON STEEL TOOLS. -88- DISGUSSION OF RESULTS. On account of the time available for the determination ofthe proper hardness to be given the steel,no definite concluBionecan be drawa* The time spent in tliis thesis work was mostly inthe desig
Heat treatment of carbon tool steels . Plg« I. SAMPLE BAR TOOL STEEL SHOWING THAT CHANGE OP HARDNESS OCCURS AT A DEFINITE BY THE GRAIN OF THE STEEL. Pig. II GAS MUFFLE FURHAOE AND AUXILILIARY APPARATUS WITH HOSKINS ELECTRIC Pig. Ill GAS FIRED OIL TEMPERIHG APPAEIATUS Fig. IV. HIGH SPEED LATHE FOR USE IN TESTIHGSPECIALLY TEMPEREDCARBON STEEL TOOLS. -88- DISGUSSION OF RESULTS. On account of the time available for the determination ofthe proper hardness to be given the steel,no definite concluBionecan be drawa* The time spent in tliis thesis work was mostly inthe design and construction of the apparatus,and when this had beensatisfactorily completed,the remaining available time was spent in alimited range of experimentation* The hardness curves be fore temper show some resemblanceto the ideal curves as derived or drawn by former lack of range in the hardening treatment would not allow exactconclusions to be drawn as to the proper hardening heat of the steel It is known that lP©.r each additional degree of temperature coarseness of theabove the hardening heat,,increases usistii tlie^^grain. This makes the steel very brittle,and less fine in texture,and consequently, is not as strong,and wi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1909
