. The 20th century toolsmith and steel worker; a complete, practical, and scientific book, written by a thorough expert mechanic and steelworker, especially in the interests of blacksmiths, toolsmiths, toolmakers, and all mechanics connected directly on indirectly with the use, repair, and manufacture of steel into tools . coal will ruin cast steel. Hot lead isyery good to heat steel in. To Heat Steel for Hardening or Tempering. Take an iron box or piece of heavy gas pipe, put tools in, pack charcoal around them, heat box or pipeuntil tools get heated in center, then dip tools in solution. For
. The 20th century toolsmith and steel worker; a complete, practical, and scientific book, written by a thorough expert mechanic and steelworker, especially in the interests of blacksmiths, toolsmiths, toolmakers, and all mechanics connected directly on indirectly with the use, repair, and manufacture of steel into tools . coal will ruin cast steel. Hot lead isyery good to heat steel in. To Heat Steel for Hardening or Tempering. Take an iron box or piece of heavy gas pipe, put tools in, pack charcoal around them, heat box or pipeuntil tools get heated in center, then dip tools in solution. For flat piece, knife, bit or blade, always heat on edge. If you lay flat on fire you will spring it, andfor flat piece, blade, bit or knife always dip toward the north. For heavy round piece, stir water to a whirl, then plunge tool in center of whirl. It will notspring. GUIDE FOE HARDENING- - CHAET A. High steel (tool steel) heated, quenched in water and kept there until cooled will be hardened andrefined (small crystals). Heat Used. Resulting Hardness. Excessively hard; almost brittle. Appearance of Fracture. Coarse grain, with fiery lustre. Too hard foreasily. Too hard for use; not strongenough. Very hard; strong enough. Very strong; hard enough exceptin middle. Stronger than bar; not hardenough. Yellow or Grain open, but not so coarse orfiery. Grain not coarse, but with somefiery lustre. Fine grain clear through; no fierylustre. Grain fine on the outside, butnot in the middle. Grain same as the bar GUIDE FOE TEMPERING - - CHAET B. High steel, after hardening, may be tempered as desired by slowly heating it in the open Are until thecorresponding color appears. If heated in oil or tallow, these colors do not appear, but indicationsof the right heat are as given below. Designationof Temper. Very Yellowish White or Straw. Temp. F. Condition of Oil or Tallow. ABOUT First begins to smoke. Orange or Gold.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherc, booksubjectsteel
