In the world industrial system, steel cable, an often overlooked component, plays an indispensable role. It is not only one of the core materials for ...
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Wholesale Stainless Steel Screw
Stainless steel screw is a common fastener, which is mainly composed of head and screw. The head has various shapes, such as flat head, round head, countersunk head, hexagon head, etc. Its function is to facilitate tools such as screwdriver or wrench to apply torque, so that screws can be screwed into objects. The screw part is externally threaded, and the shape and specification of the thread are different according to different standards. By cooperating with the internal thread (such as nut or prefabricated threaded hole) on the object, axial tension is generated during screwing in, thus fastening two or more objects together.
Stainless Steel Cross Recessed Pan Head Bolt for Machine,Furniture,Automotive Industries
Cross Recessed Pan Head Bolt is a common fastener widely used in the assembly of various mechanical ...
Cross Recessed Pan Head Self-tapping Screw
Cross Recessed Pan Head Self-tapping Screw is a common fastener widely used in various fields such a...
Cross Recessed Countersunk Head Bolt
The Cross Recessed Countersunk Head Bolt is a commonly used fastener that is especially suited for a...
Cross Countersunk Head Self-tapping Screw
Cross Countersunk Head Self-tapping Screw is a commonly used fastener, the design concept combines s...
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READ MOREHow can stainless steel screw factories avoid the blackening of stainless steel screws due to high temperatures during production?
1. Material selection and quality control
The key to controlling the blackening of stainless steel screws from the source is to select high-quality stainless steel raw materials. KAILONG has established long-term and stable cooperative relationships with many high-quality suppliers at home and abroad to ensure that the purchased stainless steel wires meet strict chemical composition and mechanical performance standards. Especially for stainless steel types that are prone to blackening under high temperature environments, such as austenitic stainless steels such as 304 and 316, KAILONG will pay special attention to key indicators such as carbon content and chromium-nickel ratio, because excessive carbon content and inappropriate alloy element ratios will increase the tendency to oxidize at high temperatures.
2. Optimize heat treatment process
Heat treatment is an inevitable part of the production process of stainless steel screws, but oxidation at high temperatures is one of the main causes of blackening. KAILONG effectively reduces the occurrence of oxidation reactions by precisely controlling the temperature curve, holding time and cooling rate during heat treatment. For example, vacuum heat treatment or inert gas protection heat treatment technology can be used to heat and cool in an oxygen-free or low-oxygen environment, thereby significantly reducing the degree of oxidation on the stainless steel surface. KAILONG has also developed specific heat treatment process parameters, such as rapid heating and rapid cooling technology, to reduce high temperature exposure time and further reduce the risk of blackening.
3. Surface treatment and protection
Surface treatment technology is also crucial to prevent stainless steel screws from blackening. KAILONG uses advanced electrolytic polishing, pickling and passivation processes, which can not only effectively remove surface defects and pollutants generated during processing, but also form a dense oxide film on the surface of stainless steel to enhance its resistance to high-temperature oxidation. In particular, electrolytic polishing, through electrochemical action, makes the stainless steel surface achieve a mirror effect, while optimizing the surface microstructure, reducing oxidation points and improving corrosion resistance. KAILONG has also developed special anti-rust oil or protective coating to provide additional protection for finished screws, which can effectively resist the erosion of environmental factors even during transportation and storage.
4. Precise control of the processing environment
Control of the processing environment is also an important part of preventing stainless steel screws from blackening. KAILONG installed an efficient air purification system and temperature and humidity control system in the production workshop to ensure a clean and dry production environment and reduce the impact of dust, moisture and corrosive gases in the air on the stainless steel surface. For processes involving high-temperature operations, such as welding and hot forging, KAILONG adopts local protection measures, such as using inert gas to protect the welding torch to reduce oxidation in high-temperature areas.
5. Quality management system and continuous improvement
KAILONG always adheres to the ISO9001:2015 quality management system certification management to ensure that every link from raw material procurement to finished product delivery meets international quality standards. The company has established a complete quality inspection system, including chemical composition analysis, mechanical properties testing, surface quality inspection, etc., to strictly monitor the entire production process. For the problem of blackening of stainless steel screws, KAILONG has set up a special research team to continuously collect market feedback, analyze the causes of blackening, and continuously optimize production processes and surface treatment technologies. Through continuous improvement and technological innovation, KAILONG has not only effectively solved the problem of blackening of stainless steel screws, but also continuously improved the overall quality and market competitiveness of its products.
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