Solderability test of electronic components Welding process of metal materials

Date：2022-09-22 18:06:13Views：729

The weldability of metal materials mainly depends on the chemical composition of the materials, and is related to the complexity of the structure, rigidity, welding methods, welding materials used, welding process conditions and the use conditions of the structure. Solderability defines the wetting of solder to metal or metal alloy surfaces under the minimum appropriate conditions. This test evaluates the strength and wetting quality of solder by replicating the contact between solder and material. It determines the wetting force and the duration from contact to wetting force formation.

The ability of metal materials to adapt to welding processing and whether they can operate safely under service conditions after welding processing is called weldability of metal materials. Therefore, weldability includes process weldability and usability weldability.

Process weldability

It refers to the ability to obtain high-quality welding joints under certain welding process conditions. Generally, the tendency of metal materials to produce cracks during welding and the tendency of welded joints to deteriorate are taken as the main indicators to evaluate the weldability of metal materials.

Working weldability

It refers to the reliability of welded joints in use, including the mechanical properties of welded joints, such as strength, plasticity, toughness, hardness, crack propagation resistance, etc; And other special properties, such as heat resistance, low temperature resistance, corrosion resistance, wear resistance, fatigue resistance, aging resistance, etc.

Low carbon steel welding is easy to obtain qualified welding joints, and the welding process does not require the use of complex welding process measures; The welded low carbon steel structure is reliable and has good mechanical properties. It can be concluded that the low carbon steel has good weldability.

However, cracks often occur when cast iron is welded, and it is not easy to obtain qualified welding joints, so it can be said that the weldability of cast iron is not good.

The qualified welding joints do not necessarily have qualified service performance, such as cast iron welding. The welding joints may be qualified without cracks and other defects. However, due to the white structure at the fusion line of the joint, it cannot be used due to mechanical processing. If the service performance is unqualified, it can be concluded that the weldability of cast iron is not good. In order to effectively utilize the weldability test of metal materials, it is important to understand the appropriate requirements of various surface conditions and test methods.

The above is about the solderability of metal materials arranged by the wound core detection team. I hope it will be helpful to you. Our company has a team of professional engineers and industry elites, and has built three standardized laboratories with an area of more than 1800 square meters, which can undertake a variety of test projects such as electronic component test verification, IC authenticity identification, product design material selection, failure analysis, functional testing, factory incoming material inspection and tape weaving.