Which of the following welding methods joins metals by melting the base materials at the joint?
Fusion welding
To solve the given question, we need to understand different welding methods and identify which method joins metals by melting the base materials at the joint.
Let's examine each option:
- Pressure Welding: This involves applying pressure to weld materials without melting the base materials. Commonly, heat may be applied, but the fundamental joining mechanism is pressure. It does not rely on melting, which excludes it from being the correct method for this question.
- Fusion Welding: This method involves melting the base materials at the joint to achieve welding. It directly uses heat to melt the metals, allowing them to fuse upon cooling. This method indeed joins metals by melting the base materials, making it the correct answer.
- Solid-State Welding: Here, welding is achieved without melting the base materials. The process involves diffusion, pressure, or relative motion to achieve a weld. Since this does not melt metals, it is not the correct method per the question.
- Resistance Welding: This is a group of welding processes where the base metals are joined by applying heat generated from electrical resistance and force. While it involves heat, it primarily relies on pressure and resistance rather than fully melting the materials. Thus, this too is not the correct method.
Based on the above analysis, Fusion Welding is the correct answer, as it involves melting the base materials at the joint to create the weld.
This welding method is used in various applications, including construction and automotive manufacturing, for its ability to create strong joints.
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