| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid phase diffusion bonding method for steel members with a hollow shape applied to a machine structural component such as a cylinder, and to provide a joint. SOLUTION: In the liquid phase diffusion bonding method for steel members with a hollow shape having excellent tensile strength, steel members comprising≥0.3 mass% C, and in which at least either has a hollow shape are subjected to liquid phase diffusion bonding in such a manner that bonding foil comprising, by mass, 2.0 to 4.5% B and 0.1 to 1.0% C, and the balance Fe with impurities is used, and is melted by heating as the parts to be bonded in the steel members are pressurized and held, thereafter, the bonded parts are again heated to the temperature range from an Ac<SB>1</SB>point to (an Ac<SB>1</SB>point+an Ac<SB>3</SB>point)/2 and are held for≥3 s, so as to be subjected to liquid phase diffusion bonding. COPYRIGHT: (C)2006,JPO&NCIPI |
