Effects of Phosphorus on the Annealing Texture, Plastic Anisotropy, and Mechanical Propertiesof Low‐Carbon Steels

The effects of phosphorus on the annealingtexture, plastic anisotropy, and mechanicalproperties of low-carbon steels containing 0.11 percentmanganese have been studied. Both vacuum-meltedand air-melted heats, with phsophorus additionsup to 0.12 percent, were used. Results showthat with a cold reduction of 80 percent, followedby annealing at temperatures in the range 710 to820°C, the plastic strain ratios, r m and ∆r, aswell as the strength of the steels were substantiallyimproved by phosphorus. Annealing at the intercriticaltemperatures 780 and 820°C further improvedthe strain ratios. The strong tendency forphosphorus to segregate at the subgrain and grainboundaries is believed to have played an importantrole in controlling the formation of annealing texturesin these steels.