 | George Bower - 1880 - 218 Seiten
...white. Cracks, threads, or sparkling partirles denote bad quality. Good steel will not bear a white heal without falling to pieces, and will crumble under...that before attempting to draw it out to a point the (racture is not concave, and should it be so the end should be filed to an obtuse point before operating.... | |
 | H. C. Godwin - 1890 - 394 Seiten
...not bear a -white heat without falling to pieces, and will crumble under the hammer at a tright-rcA heat, while at a middling heat it may be drawn out...should be drawn out to a fine point and plunged into cold water; the fractured point should scratch glass. To test its toughness, place a fragment on a... | |
 | H. C. Godwin - 1890 - 402 Seiten
...without falling to pieces, and will crumble under the hammer at a tri97tt-mi heat, while at a middlin9 heat it may be drawn out under the hammer to a fine...should be drawn out to a fine point and plunged into cold water; the fractured point should scratch glass. To test its toughness, place a fragment on a... | |
 | Calvin Franklin Swingle, Frederick John Prior - 1906 - 676 Seiten
...without falling to pieces, and will crumble under the hammer at a bright red heat, while at a mild red heat it may be drawn out under the hammer to a fine point. Case Hardening. Place horn, hoof, bonedust or shreds of leather, together with the article to be case... | |
 | William Henry Dooley - 1919 - 498 Seiten
...without falling to pieces. It will crumble under the hammer at a bright red heat, while at a moderate heat it may be drawn out under the hammer to a fine point. Iron is more active than copper. If a piece of iron wire is placed in a copper salt solution, the iron... | |
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... heat, while at a middling heat it may be drawn out under the hammer to a fine point. Care should be taken that before attempting to draw it out to a point the fracture is not concave; and should it be so, the end should be filed to an obtuse point... 