RECRYSTALLIZED MOLYBDENUM ROLLED SHEET MATERIAL AND ITS PRODUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a recrystallized molybdenum rolled sheet material in which keeps high temperature sagging resistance in high temperature characteristic evaluation at the same degree as that of the conventional one, and also is free from cracks generated upon room temperature bending and folding, and to provide its production method.;SOLUTION: The recrystallized molybdenum rolled sheet material comprising a lanthanum component of 0.1 to 1.0 mass% expressed in terms of a lanthanum element and the balance molybdenum, has: both surface layers located in regions from the outermost faces to from 100 to 150 μm and formed of equiaxial grains in which the aspect ratio of the recrystallized grains is 3 to 5; and an inside located in the region on the side inner than both surface layers and formed of huge crystal grains in which the aspect ratio of the recrystallized grains is higher than the aspect ratio of both surface layers.;COPYRIGHT: (C)2008,JPO&INPIT