Abstract
Quench-age-hardening, blue shortness, strain-age-hardening after cold-working and cold brittleness have been tested on the remelted electrolytric iron deoxidized by silicon and aluminum. As the increase of dexodizers, in these materials, the values of age-hardening after quenching from the temperatures just below A1 point have decreased, and the increases of the tensile strength in the blue heat range, have become little. Moreover, the transition temperature of cold-brittleness have lowered. Hardening values of strain-age-hardening, however, have not been changed so much after cold working. From the results of the investigation of quench-agehardening or blue shortness, non-ageing iron have been observed on the contents of deoxidizer, 0.08% aluminum.
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