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一、概述低熔点合金,通常是由锡(Sn)、铋(Bi)、铅(Pb)、锑(Sb)等几种金属元素组成,由于这几种金属熔点较低,熔合后一般在300℃以下,因此目前已被广泛使用于工业生产中,而对大型扭曲叶片中的型面定位垫块,用得更多。 1963年已前,汽轮机行业中,对低熔点合金可以为叶片生产服务,尚未完全认识。多年来仅以苏联的一套系统办法来制作型面垫块,即工人用多种型线样板(对板),在粗加工后的整体垫块上,仔细修锉型面,这样不但成本很高,而且周期特别长。后来哈汽
First, an overview Low-melting point alloys, usually from tin (Sn), bismuth (Bi), lead (Pb), antimony (Sb) and other metal elements, due to the lower the melting point of these metals, fused generally 300 ℃ below, so it has been widely used in industrial production, but for large twisted blade profile positioning pad, and more. Before 1963, the steam turbine industry, the low melting point alloy can serve blade production, not yet fully understood. For many years only a set of system methods of the Soviet Union had been used to make profile pads, that is, workers used a variety of profile models (matching plates) to carefully shape the profile on the finished pads after roughing, which made it not only costly High, but the cycle is particularly long. Later Kazakhstan steam