| 摘要 |
<p>A work-hardenable austenitic manganese steel has a base composition (each in percent by weight) of 0.8 to 1.8 carbon, 6.0 to 18.0 manganese, 0 to 3.0 chromium, 0 to 2.0 nickel, 0 to 2.5 molybdenum and 0 to 1 silicon. The ratio of carbon to manganese is in the range of 1 : 8 to 1 : 14, the remainder being iron, impurities, deoxidation additions and micro-alloying elements. The micro-alloying elements employed are vanadium and titanium, the total amount of the vanadium and titanium content being limited to the range of 0.05 to 0.08 percent by weight. The contents of vanadium and titanium should preferably be at least 0.01 percent by weight each, and more preferably at least 0.02 percent by weight each. The inclusion of vanadium and titanium brings about a reduction in grain size over the entire cross section of even large castings of work-hardenable austenitic manganese steel without impairing their mechanical properties, particularly their toughness. The steel is cold workable, and is work-hardenable by cold working. The deoxidation additions consist mainly of aluminum, and aluminum content of 0.02 to 0,09 percent by weight should remain in the steel after deoxidation.</p> |
