Abstract
AbstractThe residual stresses remaining after each individual production phase in two separate manufacturing processes involving production of round rods from Cr–V spring steel JUS C.4830 (BS 735 A 50, AISI 6150) are discussed. The first manufacturing process comprises annealing, straightening, grinding stage 1, and grinding stage 2, and the second consists of annealing, straightening, grinding stage 1, and roll milling. The aim of the investigation was the assessment of both manufacturing processes with regard to the residual stress distribution produced. The measurements were carried out via electrochemical removal and on line measurement of strain using strain gauges. The specimens for the measurements were randomly selected from the normal production process. This caused considerable spread, and an improved representation of the results obtained was achieved via a statistical treatment. A characteristic feature of both production processes is the occurrence of compressive residual stresses in the surf...
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