Welding process for one-time brazing forming of parts with different heat capacities

[0043] Example 1

[0044] A welding process of a two-kind heat capacity component primary brazing, including the following steps:

[0045] S1, surface treatment:

[0046] The welding portion of the thin wall member 1 and the high heat capacity metal base 2 sequentially serves as a golden phase sandpaper, pickled and cleaned to remove oil, oxidation, and residual metal powder particles; free silver-based solder 3 with gold-phase sandpaper. The oxide layer, then ultrasonic cleaning, the ultrasonic frequency is 300 kHz, the ultrasonic power is 800W, and the time of ultrasonic cleaning is 10mim;

[0047] Among them, the material of the thin-walled member 1 is a can which is 4J29; the thin-walled member 1 is a thin-walled tube having a diameter of 50 mm;

[0048] The material of the high heat capacity metal base 2 is an oxygen-free copper TU00;

[0049] Silver-based solder 3 is AGCU 28 series wire, silver-based solder 3 is: Cu 26 wt%, Ni0.8 wt%, GE 1 wt%, CO 2 wt%, the margin is Ag, and t

[0067] Example 2

[0068] A welding process of a two-kind heat capacity component primary brazing, including the following steps:

[0069] S1, surface treatment:

[0070] The welding portion of the thin wall member 1 and the high heat capacity metal base 2 sequentially serves as a golden phase sandpaper, pickled and cleaned to remove oil, oxidation, and residual metal powder particles; free silver-based solder 3 with gold-phase sandpaper. The oxide layer, then ultrasound cleaning, the ultrasonic frequency is 400 kHz, the ultrasonic power is 1500W, and the time of ultrasonic cleaning is 25mim;

[0071] Among them, the material of the thin-walled member 1 is stainless steel; the thin wall member 1 is a thin-walled tube having a diameter of 100 mm;

[0072] The material of the high heat capacity metal base 2 is an oxygen-free copper Tu0;

[0073] Silver-based solder 3 is AGCU 28 series wire, silver-based solder 3 is: Cu 27 wt%, Ni0.8 wt%, GE 2WT%, CO 4WT%, margin is Ag;

[0074] S2, sol

[0091] Example 3

[0092] A welding process of a two-kind heat capacity component primary brazing, including the following steps:

[0093] S1, surface treatment:

[0094] The welding portion of the thin wall member 1 and the high heat capacity metal base 2 sequentially serves as a gold-phase sandpaper, pickled and cleaned to remove oil, oxidation, and residual metal powder particles, nickel plating, plating on the thin wall member 1. The nickel layer has a thickness of 8 μm; the oxide layer on the silver-based solder 3 is removed with a metallographic sandpaper, then ultrasonic cleaning, the ultrasonic frequency is 200 kHz, the ultrasonic power is 400W, and the time of ultrasonic cleaning is 5mim;

[0095] Among them, the material of the thin-walled member 1 is a can which is 4J29; the thin-walled member 1 is a thin-walled tube having a diameter of 20 mm;

[0096] The material of the high heat capacity metal base 2 is an oxygen-free copper TU00;

[0097] Silver-based solder 3 is the