Adams Schaefer's compound for improving the quality of steel

S. Lloyd Wiegand
1886 Journal of the Franklin Institute  
of a Communica/ion, presented at t/ze Stated 3/Ieetinff of the INSTITUTE, Itch kVednesday, Octobcr 2o, Ig86.~ This compound is the subject of letters-patent of the United States, numbered 341,173, and dated May 4, 1886. It consists of rosin, linseed-oil, glycerine and powdered charcoal, heated and intimately mixed in the proportions stated in the specification. It is used by heating the steel to a clear red heat, and immersing and coating it in the compound, and tile steel is afterwards
more » ... afterwards re-heated and hardened in the usual manner by quickly cooling it.. Burned cast-steel is restored to its original condition, and the softer grades of steel acquire the properties of cast-steel by being treated as above stated. Tools made from Bessemer steel, which is incapable of being hardened, are, after treatment with this compound and hardening, capable of cutting cast-steel. Tools so treated possess a greater durability than .before, and are capable of cutting castings, which resist the best of ordinary cast-steel tools. The grain of steel exhibited by fracture of tools so treated as. compared with the same material before treatment shows a difference analogous to tha~ between fine cast-steel and coarse or blistered steel. -The compound applied to gray castings and malleable ironcastings imparts a degree of hardness to them superior to ordinary case-hardening. It is not attended in use with the unpleasant and deleterious. fumes incident to case-hardening compounds, containing hydrocyanic acid, and is much less expensive. Specimens of different materials in their normal state and also as treated with this compound and hardened were submitted, properly labelled, which conveyed a clearer conception of the effect than could be stated in language. In order that the facility of application and its effect may be seen, a forge with fuel and bars of steel and other metal and a supply of the compound were submitted, by means of which
doi:10.1016/0016-0032(86)90143-2 fatcat:j6ol4nprtvbabcxlku2zsddb24