ORIGINAL PLATE MATERIAL FOR HEAT-EXCHANGING PLATE, AND METHOD FOR FABRICATING ORIGINAL PLATE MATERIAL FOR HEAT-EXCHANGING PLATE

摘要

Provided is an original plate material for a heat-exchanging plate fabricated by press working, and also provided is a method for fabricating the original plate material. An original plate material (2) for a heat-exchanging plate (4) is a flat plate material (1) made of titanium on the surface of which convex parts and concave parts are formed, and the heat-exchanging plate (4) is then fabricated by press working the original plate material (2). The convex parts (5) and the concave parts (6) are formed in a manner such that the shape parameter defined by (Rz×L/P) is 12 μm or less, where Rz (μm) denotes the height of the convex parts (5), L (μm) denotes the width of the concave parts (6), and P (μm) denotes the pitch between neighboring convex parts (5).