| 摘要 |
<p>PURPOSE:To realize a hydraulic turbine runner having properties of high strength and high tenacity, and able to be manufactured with less manhours. CONSTITUTION:At least all of vanes 1 out of the vanes 1, a crown 2 and a band 3 for constituting a hydraulic turbine runner are of 0.01 to 0.10% carbon, 0.10 to 1.0% silicon, 0.10 to 2.0% manganese, 2 to 7% nickel, 10 to 15% chromium and 0.10 to 3% molybdenum by weight, and the remainder of Fe and unavoidable impurities, and the metallic organization is of mixture of martensite and residual austenite. They are formed of rolled steel plates each of which has the residual austenite amount of 10 to 35% by the capacity ratio. Moreover, the vanes 1 are connected to the crown 2 and the band 3 by welding.</p> |
