Which term describes joining metals using a low-melting-point filler to create a bond at relatively low temperatures?

Which term describes joining metals using a low-melting-point filler to create a bond at relatively low temperatures?

• A. Welding
• B. Soldering
• C. Adhesive bonding
• D. CNC machining

Answer: (B)

Joining metals with a low-melting-point filler that flows into the joint and then solidifies to form a bond at relatively low temperatures is soldering. In soldering, you heat only the filler metal until it melts and wets the surfaces, and capillary action draws the molten filler into the joint, while the base metals stay solid. Once it cools, the filler metal bonds the pieces together without melting them. This differs from welding, which fuses the base metals themselves at high temperatures; adhesive bonding uses glue rather than a metal filler; and CNC machining is a subtractive process, not a bonding method. Soldering is common in electronics and plumbing, using tin-based alloys and temperatures well below those used for welding.

Joining metals with a low-melting-point filler that flows into the joint and then solidifies to form a bond at relatively low temperatures is soldering. In soldering, you heat only the filler metal until it melts and wets the surfaces, and capillary action draws the molten filler into the joint, while the base metals stay solid. Once it cools, the filler metal bonds the pieces together without melting them. This differs from welding, which fuses the base metals themselves at high temperatures; adhesive bonding uses glue rather than a metal filler; and CNC machining is a subtractive process, not a bonding method. Soldering is common in electronics and plumbing, using tin-based alloys and temperatures well below those used for welding.