How many characteristics of 304 stainless steel plate when bending?

by:Caiyi     2019-12-28
How many characteristics of 304 stainless steel plate when bending? 304 stainless steel plate has beautiful surface and diversified use possibilities, good corrosion resistance, long-term durability compared with ordinary steel, 304 stainless steel plate has good corrosion resistance and high strength, thus the possibility of thin plate use is large, high temperature oxidation resistance and high strength, therefore, it can resist fire and normal temperature processing, I . e. it is easy to plastic processing, because it does not need surface treatment, so it is simple, easy to maintain and clean, and has high finish and good welding performance. The main difference in chemical composition between 316 and 304 is that 316 contains Mo, and it is generally recognized that 316 has better corrosion resistance and is more corrosion resistant than 304 in high temperature environment. Therefore, in high temperature environment, engineers usually choose parts made of 316 materials. However, there is no absolute thing. In the concentrated sulfuric acid environment, do not use 316 at high temperatures. We know that in order to prevent the thread from being bitten at high temperatures, a black solid lubricant needs to be applied. 304 because stainless steel itself has high yield point, high hardness and obvious cold work hardening effect, the characteristics of 304 stainless steel plate when bending are as follows: due to poor thermal conductivity and low elongation compared with ordinary low carbon steel, the required deformation force is large; Compared with carbon steel, stainless steel sheet has a strong tendency to rebound during bending; Due to the low elongation of stainless steel plate relative to carbon steel, the bending angle R of workpiece during bending is larger than that of carbon steel, otherwise cracks may occur; Due to the high hardness of 304 stainless steel plate and the remarkable cold work hardening effect, tool steel with heat treatment hardness above 60HRC should be selected when selecting bending tools, and its surface roughness is one order of magnitude higher than that of carbon steel bending tools. The above characteristics, in general: unit size, the thicker the plate, the greater the bending force required, and with the increase of the thickness of the plate, the bending force margin should be greater when selecting bending equipment; Unit size, the greater the tensile strength, the smaller the elongation, the greater the required bending force, and the larger the bending angle. According to the actual situation, the unfolding size of a curved workpiece is the addition of right-angle edges minus the thickness of two plates, which can completely meet the design accuracy requirements. Calculating the unfolding amount according to the empirical formula can simplify the calculation process and greatly improve the production efficiency; The greater the yield strength of the material, the greater the amount of elastic recovery. In order to obtain a 90-degree angle of the bending part, the smaller the angle of the required pressing knife is designed. Compared with carbon steel, 304 stainless steel plate with the same thickness has a larger bending angle, which should be paid special attention to otherwise bending cracks will occur, affecting the strength of the workpiece. It is not produced immediately when the lightening part is retired from the punch, and sometimes it is not cooked when the drawing deformation is first touched or vibrated; Sometimes in the deep drawing deformation first through a period of time of storage or in the application process before the attack.
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