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Heat Treatment Fastener Tips

Feb 09, 2018

The heat treatment process uses cooling and heating to operate in the solid state of the alloy or metal. The application of the fastener to achieve the desired change in stiffness, smoothness, ductility and material strength. The microstructure of metal parts was changed by annealing process, which made the manufacturing operation simpler.


In this process, the three most common types of furnaces are: rotating, intermittent, and continuous mesh belts. Such actions involve huge energy and cost investments. Therefore, it is advisable to keep a few points in mind when treating fasteners.


Note the chemical composition of the element


The chemical action of elements is of great importance to the reaction of heat treatment and the properties of fasteners. Boron (in the range of 0.0005% to 0.003%) is one of the elements used as a hardening agent, although it does not significantly affect formability and machineability. However, fastener distributors should know that anything over 0.003% boron has a damaging impact on the finished product.


In the process of steelmaking, boron nitride is formed when free nitrogen is not combined and the availability of boron is reduced. To counteract this effect, the addition of aluminum or titanium is appropriate. Elemental chemistry is essential in this regard because these elements may slow down carburizing.


Cleaning and drying of parts


Even if the heat treatment process tolerates moist parts, there is no reason not to pay attention to cleaning and drying parts. You just move dirt from the surface of the part to the processing system. There are four process parameters that control proper cleaning: elemental chemistry, energy, time and temperature applications. Cleaning can be done by hand, spray mixer, ultrasonic, immersion or through chemical and thermal operation. Surface contaminants can cause problems in equipment operation for a long time.


Prevent threads parts from bending and damaging


The damage to the thread is usually due to improper operation, such as dumping the bathtub into the loading transport equipment, or when the fastener (whether Monel 400 bolts or aluminum nails) is soft in the pre cleaning part. Improper use of metal rods to remove the blockage will cause irreversible damage to the thread. For example, a flat rivet falls on the hardening groove and hits the bottom plate, causing it to bend. When the load exceeds the length to the diameter, we get a curved fastener at the end of the operation. Operators should know what to do with jam. When the device is under repair, you can examine several specific areas to determine the true source of the problem.


Control annealing operation


The ball is a halfway step that requires rolling the wire into a smaller instrument without forming a crack. For fasteners, it is a necessary process to ensure the softness and formability of steel. Annealing leads to the formation of carburized layers, which are further decomposed into spherical and spherical forms. The ball assists in the cold deformation process, such as the title, scrolling and bending.


Maintain uniform belt loading


In a given time period to maintain a standardized belt loading and constant temperature profile, can effectively achieve the function of the network belt conveyor. Overload and improper handling can lead to shortened belt life, possibly lasting around 6 months.


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