Hey there! I’m a supplier of welded link chain, and I’ve seen my fair share of chain failures over the years. In this blog, I’m gonna talk about some of the common failures of welded link chain and what you can do to avoid them. Welded Link Chain
1. Weld Failure
One of the most common issues we see with welded link chain is weld failure. The welds are what hold the individual links together, and if they’re not done right, the whole chain can fall apart. There are a few reasons why weld failures happen.
First off, poor welding technique can be a major culprit. If the welder doesn’t have the right skills or doesn’t follow the proper procedures, the weld might not be strong enough. For example, if the weld isn’t deep enough or if there are impurities in the weld area, it can lead to a weak joint.
Another factor is overloading. If you use the chain in a situation where it’s carrying more weight than it’s rated for, the stress can be too much for the welds. Even if the welds were initially strong, the excessive load can cause them to crack and eventually break.
To prevent weld failures, make sure you’re working with a reliable chain supplier who uses high – quality welding equipment and well – trained welders. Also, always check the chain’s load capacity and never exceed it.
2. Wear and Tear
Wear and tear is a natural part of a chain’s life, but it can also lead to failure if it’s not monitored. The constant friction between the chain and the surfaces it comes into contact with, like sprockets or pulleys, can cause the links to wear down over time.
The most common areas for wear are the contact points between the links. As the chain moves, these points rub against each other, and the metal gradually gets thinner. If the wear progresses too far, the links can become too weak to hold the load, and the chain can break.
Environmental factors can also accelerate wear. For example, if the chain is used in a dirty or abrasive environment, like a construction site or a mining operation, the dirt and debris can act like sandpaper on the chain, causing it to wear out much faster.
To reduce wear, you can use lubrication. Applying a good quality lubricant to the chain can help reduce friction and protect the metal from abrasion. Regular inspections are also crucial. Check the chain for signs of wear, such as thinning links or excessive play between the links, and replace the chain when it reaches the end of its useful life.
3. Corrosion
Corrosion is another big problem for welded link chain, especially if it’s used in a wet or corrosive environment. When the chain is exposed to moisture, oxygen, and other corrosive substances, a chemical reaction occurs that eats away at the metal.
There are different types of corrosion. Rust is the most common one, which happens when iron – based chains are exposed to water and oxygen. Other forms of corrosion can occur in different environments. For example, in a salt – water environment, the salt can accelerate the corrosion process and cause pitting on the surface of the chain.
Corrosion weakens the chain by reducing its cross – sectional area. As the metal corrodes, it becomes thinner, and the chain loses its strength. This can lead to sudden failure, especially if the chain is under load.
To prevent corrosion, you can choose chains that are made from corrosion – resistant materials, like stainless steel. If you’re using a regular steel chain, you can apply a protective coating, such as zinc plating or powder coating, to shield it from the elements. Also, try to keep the chain dry and clean as much as possible.
4. Fatigue Failure
Fatigue failure occurs when the chain is subjected to repeated loading and unloading. Every time the chain is used, it experiences stress, and over time, these repeated stresses can cause microscopic cracks to form in the metal.
These cracks start small, but as the chain continues to be used, they gradually grow. Eventually, the cracks become large enough to cause the chain to break. Fatigue failure is often hard to detect because the cracks can be hidden inside the chain, and there may not be any obvious signs of damage on the surface.
The frequency and magnitude of the loading are important factors in fatigue failure. Chains that are used in applications where they experience high – frequency, high – stress cycles are more likely to fail due to fatigue. For example, chains used in a conveyor system that runs continuously are at a higher risk.
To prevent fatigue failure, it’s important to choose the right chain for the application. Make sure the chain is designed to handle the expected load and the number of cycles. Regular inspections can also help detect early signs of fatigue. Non – destructive testing methods, like magnetic particle inspection or ultrasonic testing, can be used to check for internal cracks.
5. Improper Installation
Believe it or not, improper installation can also lead to chain failure. If the chain isn’t installed correctly, it can be subjected to uneven stress, which can cause premature wear and failure.
For example, if the chain is too tight, it can put excessive stress on the links and the sprockets. This can cause the chain to stretch, wear out faster, and even break. On the other hand, if the chain is too loose, it can skip on the sprockets, which can also lead to wear and damage.
Another common installation mistake is not aligning the sprockets properly. If the sprockets aren’t in line, the chain will rub against the sides of the sprockets, causing uneven wear and increasing the risk of failure.
To ensure proper installation, always follow the manufacturer’s instructions. Use the right tools and make sure the chain is adjusted to the correct tension. Check the alignment of the sprockets and make any necessary adjustments.
Conclusion
Well, there you have it – some of the most common failures of welded link chain. As a supplier, I know how important it is to have reliable chains that can do the job. By being aware of these potential problems and taking the right preventive measures, you can extend the life of your chain and avoid costly breakdowns.
Galvanized Steel Wire If you’re in the market for welded link chain or have any questions about chain selection, installation, or maintenance, don’t hesitate to reach out. I’m here to help you find the best chain for your needs and ensure that it performs well. Let’s have a chat and see how we can work together to get the job done right!
References
- ASME B29.1 – 2011, Roller Chains, Attachments, and Sprockets
- ISO 1977 – 2006, Welded steel link and other chain for general lifting purposes – Grade T (T8) – Safety
- ASTM A952/A952M – 18, Standard Specification for Steel Chain, Welded, Grade 80, for Overhead Lifting
Nantong Shenwei Steel Wire Rope Co., Ltd.
Nantong Shenwei Steel Wire Rope Co., Ltd. is well-known as one of the leading welded link chain manufacturers and suppliers in China since 1994. Our factory offers high quality welded link chain made in China with competitive price. Welcome to contact us for quotation.
Address: No.1709, Zhangjiang Road, Nantong Economic Development Zone, Nantong City, Jiangsu, China
E-mail: nt@sw-steelwirerope.com
WebSite: https://www.shenwei-steelwirerope.com/
