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Effect of Copper and Silicon on Selected Mechanical Properties of Hot-rolled Medium-carbon Steels.

Authors
Copeland-MI
Source
NTIS: PB 224 090 :19 pages
Link
NIOSHTIC No.
10009052
Abstract
The Bureau of Mines investigated the effect of up to 1 wt-pct of copper and silicon on the heat treatment response and hardness, tensile, and impact properties' of hot-rolled medium-carbon steels. The steels were prepared by induction melting and fabricated into plates by forging and rolling. The tensile strength of 0.2-wt-pct carbon steels containing 0.3 wt-pct silicon was affected significantly by copper in both the hot-rolled and heat-treated (600 deg c) conditions, whereas the tensile strength of the 0.3-wt-pct carbon steels was less affected. A 600 deg c treatment was considered optimum as a post-rolling treatment to strengthen the steels by copper precipitation. Strengthening of 0.2-wt-pct carbon steels by silicon was reduced by increasing copper contents. Optimum impact strengths occurred at about 0.3 wt-pct silicon in 0.2- wt-pct carbon steels containing 0.6 and 0.8 wt-pct copper. The impact strengths were lowest for 0.2-wt-pct carbon steels containing over 0.8 wt-pct copper and greater than 0.3 wt-pct silicon, especially in the heat-treated condition. Copper and silicon solutes and copper precipitates strengthened the steels. This effect was augmented slightly by strengthening through grain refinement by these solutes.
Publication Date
19730101
Document Type
IH; Report of Investigation;
Fiscal Year
1973
NTIS Accession No.
PB-224090
NTIS Price
A03
Identifying No.
RI 7777
NIOSH Division
ALRC;
Source Name
NTIS: PB 224 090
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