stainless steel dehydrator austenitic stainless steel (represented by 304) magnetic ...
by：IKE Food Machinery 2019-06-09
In real life, most people think that stainless steel is not magnetic and it is very scientific to identify stainless steel with magnets.First, the alloy of zinc and the alloy of copper can generally imitate the appearance color of stainless steel. there is no magnetic property and it is easy to mistakenly think that it is stainless steel;Even our most commonly used 304 steel will have different degrees of magnetic properties after cold processing, so it is not possible to judge the authenticity of stainless steel only with magnets.So how did the magnetic properties of stainless steel come from?According to the study of material physics, the magnetic properties of metals come from the structure of electronic spin, which belongs to the properties of quantum mechanics, can be upward or downward.In ferromagnetic metals, the electrons automatically rotate in the same direction, some antiferromagnetic metal materials are in regular patterns, while adjacent electrons move in the opposite direction or counter-parallel spin, but for triangular crystals of electrons, since two electrons in each triangle must spin in the same direction, the spin structure no longer exists.Under normal circumstances, the Austrian stainless steel (represented by 304) is noneIt is magnetic, but it may also be weak magnetic, as well as ferrite body magnetic (mainly 430, 409l, 439 and 445nf, etc ).) And represented by martensite) are generally magnetic.Stainless steel of some steel (such as 304, etc.Classified as nonMagnetic stainless steel \ "means that its magnetic index is only lower than a certain value, that is, the general stainless steel is more or less magnetic.What is mentioned is thatDue to the partial analysis of smelting components or improper heat treatment, a small amount of slats or iron is contained in stainless steel, which is cold-After processing, the organization will also change to Batten, the larger the deformation of cold processing, the greater the change of Batten, the stronger the magnetic properties.Think.So 304 stainless steel will be weak magnetic.In order to completely eliminate the magnetic properties of 304 stainless steel, it is possible to restore its magnetic properties by high temperature solution to stabilize its OHL tissue, thus eliminating the magnetic properties, therefore, the magnetic properties of the material are regular arrangement and electron spin of co-Direction determination, we believe that the physical properties of the material, the corrosion resistance of the material is determined by the chemical composition of the material, the chemical properties of the material, and whether the material has nothing to do with magnetism.From the perspective of the development of stainless steel, 400 series instead of 300 series is the trend of the times.200 series of materials face many difficulties due to scrap recycling.Stainless steel environmental protection, if increasing the use of steel is not conducive to the sustainable development of the entire stainless steel industry, then many large enterprises with vision now want 200, and look forward to the development of 400 series stainless steel has more potential.It is often believed that the stainless steel suction device, in order to verify its advantages and disadvantages and authenticity, does notMagnetic, that is good, genuine;Magnetic absorption is considered false.In fact, this is a veryA one-sided, unrealistic way to identify errors.There are many kinds of stainless steel, which can be divided into several categories according to the tissue structure at room temperature.304,321,316,310 and austenitic style;2.Such as: 430,420,410 steel or iron body type;Non-ferrous typeIt is magnetic or weak magnetic, and martensite or ferrite is magnetic.The commonly used stainless steel decorative tube pieces are mostly made of aoshi 304, usually magnetic or weak magnetic, but smelting due to fluctuations in chemical composition or processing status may also have magnetic properties, but this cannot be regarded as false, it can't be considered unqualified. what is the reason for this?The above-mentionedMagnetic or weak magnetic properties, but magnetic ones are slats or ferrite, which, due to the partial analysis of smelting components or improper heat treatment, will cause the Austrian 304 stainless steel in a small amount of slats or iron body tissueIn this way, 304 stainless steel will be weak magnetic.In addition, after the 304 stainless steel is cold processed, the organization will be transformed into a Batten, the greater the degree of deformation of the cold forming, the greater the transformation of the Batten, the greater the steel, the greater the magnetic properties.As a batch of steel, the production of Phi 76 pipes has no obvious magnetic sense and production of Phi 9.5 tube.Due to the obvious deformation of the ring bend with large magnetic induction, the rectangular tube on the production side is deformed more than the tube, especially the corner part is deformed stronger and the magnetic induction is obvious.In order to completely eliminate the above-The reason for the magnetic properties of the 304 steel mentioned can be restored by high temperature solution to stabilize the OHS tissue, thus eliminating the magnetic properties.In particular, the magnetic properties of 304 stainless steel caused by the above reasons are different from those of other materials such as 430, carbon steel, that is, the magnetic properties of 304 steel always show weak magnetism.This tells us that for stainless steel with weak magnetic or completely non-magnetic, it should be judged as 304 or 316 material;If it is the magnetic properties of carbon steel, it shows strong magnetic properties because it is not 304 of the material.