SU804299A1 - Solder for soldering higt-melting metals and their alloys - Google Patents

Description

Guaranteed operation of paired connections prn.

In addition, with a higher germanium content (above 20%) in the solder, due to the formation of brittle intermetallic interlayers in the junction, soldered joints under the conditions of vibration, shock loads and terlucification are not ensured.

The proposed solder containing germanium is 15–20%, the rest is copper, with the melting temperature of BOO-VZO C ensures the operability of the joints at elevated temperatures (about 600 ° C) and the reliability of Hx under the conditions of mechanical loads of vibration, shock loads and thermal cycling. due to a more stable structure of solder compounds.

Example. Prepare three solder compositions with the following ratio of components, wt.%:

I II III

Germanium 15 17 20, Copper 85 83 80

In the process of developing small-size miniature EWPs, there is the problem of soldering miniature thin-walled (about 0.1mm thickness) parts made of molybdenum, wolf frame and their alloys. Hot connections should be mechanically strong and reliable when working in

conditions of high temperatures and mechanical loads.

The proposed solder provides good wetting of the joined surfaces without deep, dissolving them and rapid formation of a spa at 800-850 ° C. Seed connections are reliable in the specified conditions.

 the invention

Solder for the soldering of refractory metals and their alloys, mainly molybdenum and tungsten rubber containing copper and germanium, characterized in that, in order to improve the quality of solder joints, working under conditions of elevated temperatures and mechanical loads, as well as reducing the melting temperatures of the solder, it contains components in the following ratio, wt.%: Germanium15-20

CopperExtraable

Sources of information taken into account pr expertise

1. USSR author's certificate

 490605, class B 23 K 35/30, 11.03.74.

2. USSR author's certificate

I 206988, class At 23 K 35/30, 30.05.66.

Claims (2)

Claim Solder for brazing refractory metals and their alloys, mainly molybdenum and tungsten, containing copper and germanium, distinguishing • 5 s in that, in order to improve the quality of soldered joints working at elevated temperatures and mechanical loads, as well as lowering the melting temperature at 20 singing, it contains components in the following ratio, wt.%: Germanium 15-20 Copper Else “with Sources of information taken into account by examination 1. USSR Copyright Certificate No. 490605, cl. B 23 K 35/30, 11.03.74. 2. Copyright certificate of the USSR No. 206988, cl. B 23 K 35/30, 05/30/66.