制造飞机螺旋桨叶模锻件的试验表明,其中某些桨叶在机械加工和蚀洗后,出现粗晶组织区。这些区域,通常分布在模锻件的叶尖处,多半分布在最薄的断面上,这些断面在模锻件制造过程中受到的变形最大。不同模锻件的粗晶组织区的大小差别很大。在一些情况下,这些区域在叶尖端部只占很小的一部分,或沿着叶尖的边缘分布。而在另一些情况下,则扩大到沿叶尖长度和宽度的绝大部分地区。细 Tests to produce aircraft propeller blade forgings have shown that some of the blades appear as coarse grained texture after machining and etching. These areas, usually at the tip of the die forgings, are mostly distributed in the thinnest sections that undergo the most deformation during die forging manufacturing. Different forgings coarse grain organization of large differences in size. In some cases, these areas only account for a small portion at the tip of the tip, or along the edge of the tip. In other cases, it extends to most parts along the length and width of the tip. fine