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在我厂承修若干艘海轮的过程中,经对勘验结果,往往会发现一般车叶之表面剥蚀情况甚为利害,特别是在叶尖之近导边部分更为激剧,有原来厚度约十多公厘之叶厚部分,被剥蚀至仅剩下1～2公厘,也有某些部分被腐蚀光,而失去了车业之原设计外形,就是在一般剥蚀不太利害之处,也形成了很多大小不同之凹穴;在船舶修理过程中,处理方法有二种,一种是干脆调换新车叶;另一种是从节约观点出发,利用割换剥蚀激剧部分以及凹穴堆焊的方法将车叶修复后继续使用,本文主要为通过某海轮车叶之修复实例,对其修复时所采用之工艺方法,作概括之介绍。该车叶之原始设计尺度为;车叶直径(D)3.60公尺;螺距(P)4.25公尺;螺距比(P/D)1.18;叶厚分数0.0445;叶片数目4;材料铸钢;车叶重量约2900
During the process of undertaking a number of seagoing vessels in our factory, it is often found that the denudation of the surface of the general vanes is very harmful to the exploration results. In particular, the edge of the leading edge of the vane is more aggravated. The original thickness About ten centimeters thick leaves, was eroded to only 1 to 2 mm, there are some parts of the corrosion of light, and lost the car’s original design shape, is not harmful in the general erosion of the Department, Also formed a lot of different sizes of pockets; in the ship repair process, there are two ways to deal with, one is simply the replacement of new car leaves; the other is from the saving point of view, the use of cut denudation excitatory part and the pit pile Welding method will be used to repair the car leaves, this paper mainly through the repair of a marine wheel leaves example, the repair process used to make a general introduction. The original design dimensions of the vane are; the vane diameter (D) is 3.60 meters; the pitch (P) is 4.25 meters; the pitch ratio (P / D) is 1.18; the leaf thickness fraction is 0.0445; the number of vanes is 4; Leaf weight about 2900