| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a powder brazing filler metal composition which achieves brazing excellent in corrosion resistance, and to provide a tube having the powder brazing filler metal composition, and a heat exchanger. <P>SOLUTION: The powder brazing filler metal composition is made of Si powder, fluoride based flux and a binder. In the Si powder, the value of the maximum particle diameter (D99) which satisfies that the accumulative particle distribution on the volume standard from the small particle diameter side reaches 99% is 5 to 20μm, and further, the content of the coarse particles satisfying (D99) value×5 or more is <1 ppm. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
