Are you interested in knowing which solder is stronger? First you have to find out about the activity of welding, since it is an activity widely used in the industry, and consists of melting two or more pieces -normally metal- by pouring.
Another way forward is to melt the outer material that will be used as the conductor for the components, without melting the metal of the assembled parts, which is called hard soldering or soldering.
In the world there are a large number of types of welding, then we are going to present you the welds that are most used in the metalworking industry, we will talk about the advantages and disadvantages of each of them.
First, we must keep in mind the following to fully understand the types of welding, and that is that within this entire classification are the welding methods which we will see below and thus we will answer the question of which weld is more resistant.
welding methods
A. Traditional welding:
This type of welding is made up of a transformer that reduces the voltage and a unit of diodes, which allow convert alternating current from the network into direct current.
B. Electric welding:
Electric welding consists of melt metal at high temperature (about 4000 °C, which results in a weld bead formed by melting both the base material and the filler.
This heat gives way to an electrical current, with a degree of precision and control, that can bond metals together.
C. Inverter welding:
This welding method is also known as dc welding, is a modern and digitized version of the classic welding machine or traditional welding.
The operation of both methods is based on the same concept, which is converting alternating current into direct current to create a voltage arc, only in this case a more complex silicon-based technology is used, while traditional welders They use transformers and rectifiers made of heavy copper or aluminum.
Now that we are clear about this, we are going to go into more detail.
Types of Welding
Among the traditional welds are:
1. Forge welding:
It is an ancient technique of join pieces of metal using heat and force and is also subdivided by two types of welding. By fusion and solid state.
1.1 Fusion welding:
Metals are usually heated by fire, and force is usually applied with hammers.
1.2 Solid State Welding:
The material is heated and pressed to join, however, the metal is not melted or anything else is added.
For this type of welding it is very common to use as tool a torch that combines oxygen and acetylene. One of the biggest benefits of this type of welding is that it is very economical welding method for small scale production.
The mechanical process is easier than other mounting methods.
2. Gas welding:
A process known as soldering is used. oxy-fuel. It was widely used in pipe and tube welding and repair work, yes it is true that in recent years the popularity of gas welding has declined in industrial applications, however it has continued to perform well in applications that we just mentioned
The combustion of acetylene in oxygen is commonly used to produce a flame at 3100 degrees. Although the welding cooling time is longer than other methods, which may cause some deformation, facilitates the welding of high-alloy materials.
methods of sgas pressure welding are very similar and only differ in the type of gas used.
It is used to join metallic materials such as copper or aluminum. Among its main advantages are the low cost and ease of filling the crewHowever, it must be taken into account that the material takes longer to cool down.
Turning to the types of electric welding we find the following:
3. Resistance welding:
Resistance welding is a thermoelectric process in which heat is generated on the surface of the parts to be joined. It works by passing electrical current through components for a precisely controlled time and under controlled pressure.
This type of welding is also known as strength. The term "resistance welding" arose from the fact that the resistance of the workpiece and the electrode are used together or against each other to generate heat at their intersection.
It is a type of welding currently most used, and of great importance in modern industry, especially in the processing of thin metal sheets. Resistance welding is also used in the manufacture of car bodies, household appliances, in the electrical and toy industries.
The main advantages of resistance welding are:
- Very short processing time.
- It does not require any consumables such as materials or welding rods.
- Safe operation thanks to low voltage.
- It is clean and environmentally friendly.
- The result is a reliable electromechanical seal.
- Greater ease of transport due to light weight machinery.
4. Brazing and soldering:
In this welding process heat is also applied, however, the base metal is not melted but the filler metal, that is, the additional material bonds the dissimilar pieces of metal together without changing the metal, changing its natural state.
4.1 Soft soldering:
Soft soldering is done with heat that should not exceed 450 degrees.
This welding joins materials, generally metals, by melting and placing filler metal (solder) in the joint, which it has a lower melting point than the surrounding metal.
Today's welders use lead free alloys for applications in the electronics and health industries; They use metals such as gold, silver, copper, brass and iron.
Today's welders use lead free alloys for applications in the electronics and health industries; They use metals such as gold, silver, copper, brass and iron.
- There is greater efficiency of the process.
- It reaches through this welding heat quickly and locally.
- Save energy through this method.
- Oxidation of the cut is better.
- Non-polluting and safe energy is used.
4.2 Brazing:
The welding process is carried out by heat that always exceeds the 450 degrees. can reach more than 900 degrees if braking is done at high temperature.
Welding is done in a completely different way than arc welding, which we'll look at next. The first big difference is the temperature: welding does not melt the base metal.
This means that the welding temperature is always lower than the melting point of the metal. base. welding temperatures they are much lower than arc welding temperatures for the same base metals and require less energy.
Brazing is very strong on non-ferrous metals and steel, the tensile strength of the joint is identical; Usually outperforms bonded metal. In stainless steel, the gasket can develop a tensile strength of 130,000 pounds per square inch (896.3 MPa [MPa]).
- Welded joints are malleable and can withstand strong shocks and vibrations.
- It is an easy method to use and ideal for joining ferrous and non-ferrous metals.
- Brazing is done at relatively low temperatures, so there is less danger of deformities.
- It is an economical welding method.
5. Arc welding:
First of all, it is part of electric welding, of all types of welding, the easiest to use is electric arc welding, which It uses a source of electrical energy that allows the metal to be melted. In this type of welding we can highlight both MIG and TIG welding.
First of all, welding MIG It is a process that uses a continuous feed of wire as the electrode and a semi-ert gas mixture to protect the weld, and is ideal for joining mild steel, stainless steel and aluminum. It should be noted that MIG welding is not recommended for outdoor use as it requires the use of gas.
In the case of welding equipment TIG, This is a process that uses a permanent tungsten electrode, resulting in a wire that is extremely durable and less prone to corrosion.
The greatest advantage of the arc welding method is mainly the obtaining particles of greater resistance, more ductility and less susceptibility to corrosion than other processes, as the shielding gas prevents contact between the atmosphere and the combined weld pool
We invite you to read another blog about characteristics, advantages and disadvantages of TIG arc welding:
We hope that it has been useful to you and that now you can better direct your search to find the method of welding that best suits your needs, do you already know which one? welding is more resistant?
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