The surface quality of 304 stainless steel plate is mainly determined by the pickling process after heat treatment. If the surface oxide scale formed by the previous heat treatment process is thick or the structure is uneven, pickling cannot improve the surface finish and uniformity. Therefore, full attention should be paid to the heating of heat treatment or the surface cleaning before heat treatment. If the thickness of the oxide scale on the surface of the stainless steel plate is not uniform, the surface finish of the base metal under the thick part and the thin part will also be different. Therefore, the surface of the steel plate is not uniform. Therefore, it is necessary to uniformly form oxide scales during heat treatment. To meet this requirement, the following issues must be noted: If the stainless steel plate adheres to oil on the surface of the workpiece during heating, the thickness and composition of the oxide scale at the oil-attached part will be different from the thickness and composition of the oxide scale in other parts, and carburization will occur. The carburized part of the base metal under the oxide scale will be severely attacked by the acid. The oil...
There are three main factors that affect stainless steel corrosion: 1. The content of alloying elements. Generally speaking, the content of chromium is 10.5%, and the steel is not easy to rust. The higher the content of chromium and nickel, the better the corrosion resistance. For example, the content of nickel in 304 material is 8-10%, and the content of chromium is 18-20%. Such stainless steel will not rust under normal circumstances. 2. The smelting process of the manufacturer will also affect the corrosion resistance of stainless steel. A large stainless steel plant with good smelting technology, advanced equipment and advanced technology can ensure the control of alloying elements, the removal of impurities, and the control of the cooling temperature of the billet, so the product quality is stable and reliable, the internal quality is good, and it is not easy to rust. On the contrary, some small steel mills have backward equipment and backward technology. During the smelting process, impurities cannot be removed, and the products produced will inevitably rust. 3. The external environment, the climate is dry and ventilated, and it is not easy to rust. The air humidity is high, continuous rainy weather, or environmental areas with...
What should be paid attention to when grinding 304 stainless steel plate? How much do you know about this issue? The editor of the 304 stainless steel plate below will tell you about this problem, and I hope it will help you. 1) When grinding 304 stainless steel plate, reducing the adhesion and blockage of the grinding wheel is an important factor to improve the grinding efficiency. The grinding wheel should be trimmed frequently during processing to keep the cutting edge sharp. 2) The main goal of grinding 304 stainless steel plate is to choose a grinding wheel with good self-sharpening. Generally, the grinding wheel with low hardness is good, but the hardness should not be too low, otherwise the abrasive particles will fall off without being blunt. Class J is recommended. 3) In order to reduce the adhesion and blockage of the grinding wheel during grinding, a coarse-grained grinding wheel should be selected. Use No. 36 and No. 46 grain size for rough grinding, and No. 60 grain size for fine grinding. 4) When grinding 304 stainless steel plate, the use of GC grinding wheel can improve the grinding efficiency. 5) The selection of grinding fluid needs to take...
What are the requirements for 304 stainless steel plate inspection? The editor of the 304 stainless steel plate below will tell you about this problem, and I hope it will help you. First of all, you should pay attention to check the corrosion resistance requirements of 304 stainless steel plate. This aspect mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and internal structure. The main role is to Chromium element. The chromium in Wuxi 304 stainless steel plate has high chemical stability. After the test force is removed after a specified holding time, a passive film can be formed on the steel surface. Regarding the calculation formula of this passive film for 304 stainless steel plate, it should be noted that it will isolate the metal from the outside world and protect the steel plate from being oxidized. After the passivation film is destroyed, the corrosion resistance decreases. The chromium content (%) in the 304 stainless steel plate is 17.00-19.00, which is cut into billets with a length of one meter. Nickel content.%) 8.00-10.00, stainless steel is a universal stainless steel material, its rust resistance is stronger than that of 200 series stainless steel materials, and...
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