Abstract:The microstructural influence of martensitic carbon steel on torsional fatigue endurance was investigated, taking into consideration the application of high strength steel electric resistance welded (ERW) tubes to automotive structural parts. The chemical composition of the base steel alloy was 0.1-0.2%C-0.2-1.5%Si-1.3-1.9%Mn-0.01%P-0.001%S-(Cr,Mo,Ti,Nb,B). Laboratory vacuum-fused ingots were hot-rolled, heated to 1023 or 1223 K in a salt bath, and then waterquenched and tempered at 473 K. Consequently, three … Show more
“…(4) are Cϭ9.30ϫ10 Ϫ14 and mϭ4.27, which are the reported values of Hvϭ235 carbon steel. 16) Calculated Nc are listed in Table 1. Nc varies from 2 100 to 6 200 accompanying the change of De/2 from 0.27 to 0.21%.…”
“…(4) are Cϭ9.30ϫ10 Ϫ14 and mϭ4.27, which are the reported values of Hvϭ235 carbon steel. 16) Calculated Nc are listed in Table 1. Nc varies from 2 100 to 6 200 accompanying the change of De/2 from 0.27 to 0.21%.…”
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