Suiting the Heat Treatment to the Job: A Simple Discussion of the Problems of Heat Treatment ...
United States Steel, 1946 - Steel - 54 pages
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agitation air cooling alloy content austempering process bainite or martensite bainite structure bath booklet BRINELL HARDNESS NUMBER carbide carbon content circulation compression cracking cylinder decarburization desired energy absorbed example exhibit ferrite Figure 24 Figure 25-A form pearlite formation of bainite formation of pearlite greater hardness and strength heat is abstracted heat treating heat treatment high hardness higher carbon steel inside ISOTHERMAL TRANSFORMATION DIAGRAM logarithmic scale low alloy steel lower temperature martensite transformation microscopic structure called ness notch notch-bar test NOTCH-BAR TOUGHNESS obtained perature quenched and tempered quenching liquid quenching operation reduction of area residual stress result ROCKWELL C HARDNESS room temperature S-curve seconds section CD severity of quench shown in Figure spheroidite strength and toughness structure of Figure surface tempering range tempering temperature tensile test tension thermal contraction tion transformation expansions transformation product transformation temperature transformation to martensite transformation to pearlite ture whereas yield strength zone