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CruiserFJ62
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What are the effects when welding takes place on a fastener. If the head of a bolt or nut is welded to a plate how does it change the properties of the hardware?
You are posing a problem that is not possible to resolve with charts and tables. How much heat was applied during welding? What type of welder was used, and what is the operating temperature of the arc? How much of the bolt's surface was in contact with underlying metal, and what is the thermal conductivity of that metal? You can pile on complication on complication very easily with a bit of thought.CruiserFJ62 said:Does anyone know of a table shows annealed vs tempered&quenched steel properties? What is the decrease in yeild stress on a grade 8 bolt that is annealed due to the heat from welding?
turbo-1 said:You are posing a problem that is not possible to resolve with charts and tables. How much heat was applied during welding? What type of welder was used, and what is the operating temperature of the arc? How much of the bolt's surface was in contact with underlying metal, and what is the thermal conductivity of that metal? You can pile on complication on complication very easily with a bit of thought.
If the bolt is in its annealed state, it will have no more strength than a common fastener, and possibly less, since you might have created discontinuities in its internal structure that would make it prone to sudden complete failure, instead of just stretching/distortion that you might have gotten with a common fastener.CruiserFJ62 said:I'm not really trying to get an exact answer but an understanding of what the worst case would be if the material was in its annealed state?
turbo-1 said:If the bolt is in its annealed state, it will have no more strength than a common fastener, and possibly less, since you might have created discontinuities in its internal structure that would make it prone to sudden complete failure, instead of just stretching/distortion that you might have gotten with a common fastener.
Welding fasteners are mechanical components used to create a strong and permanent joint between two or more pieces of metal. They are commonly used in industries such as construction, automotive, and manufacturing to join metal parts together.
There are several types of welding fasteners, including studs, nuts, bolts, screws, and washers. Each type has its unique properties and is used for different applications.
Welding can significantly alter the properties of fasteners, such as their strength, ductility, and corrosion resistance. The high temperatures and rapid cooling during welding can cause changes in the microstructure of the fasteners, which can affect their mechanical properties.
When selecting welding fasteners, factors such as the type of metal being welded, the application, and the welding process used should be considered. It is essential to choose fasteners with properties that can withstand the welding process and the intended use.
To minimize the effects of welding on fasteners, it is crucial to select proper welding techniques, such as preheating and slow cooling, to reduce the thermal stress on the fasteners. Choosing fasteners with high-temperature resistance and post-weld heat treatment can also help to minimize the changes in their properties.