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摘自《特许公報》,1993年,平5-24984 在海水和江河中使用的机器和设备,要求采用耐蚀性优良的材料制造,而在发电用水轮机转轮和叶片上使用的材料,则要求具有更高的强度和耐腐蚀疲劳强度,并且对于象转轮之类大型回转结构件来说韧性也很重要。转轮上的导流叶片常用铸钢制造,为了修整铸件常常需要采取补焊措施,特别是大型水轮机是由分型铸造的,并经焊接成为一个整体,所以对于这类材料的焊接性要求也很高。
From “The Gazette”, 1993, pp. 5-24984 Machines and equipment used in seawater and rivers require the use of materials with good corrosion resistance, while materials used on the runner and blades of power plants require Have higher strength and corrosion fatigue resistance, and toughness is also important for large slewing structures such as runners. The guide vanes on the runner are commonly made of cast steel. In order to trim the castings, it is often necessary to take welding measures. In particular, the large hydraulic turbine is cast by the parting mold and welded to form a whole. Therefore, the welding requirements for such materials are also High.