Material analysis and identification method of stainless steel sculpture
We can see all kinds of sculptures everywhere in our lives. Among them, stainless steel sculpture is a relatively common one. For stainless steel sculptures, people may still have a little understanding of it. Let me introduce the material analysis of stainless steel sculpture and its Identification method. 1. Analysis of stainless steel sculpture materials 1. Ferritic stainless steel contains 12% to 30% chromium. Its corrosion resistance, toughness and weldability increase with the increase of chromium content, and its resistance to chloride stress corrosion is better than Other types of stainless steel. 2. Austenitic stainless steel contains more than 18% chromium, and also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. It has good overall performance and can resist corrosion by various media. 3. Austenite- Ferritic duplex stainless steel has the advantages of austenitic and ferritic stainless steel, and has superplasticity. 4. Martensitic stainless steel has high strength, but its plasticity and weldability are poor. 2. Stainless steel sculpture material identification method 1 , Pickling stainless steel sculptures have a silvery white surface, chromium-nickel stainless steel and silver white jade; chromium stainless steel has a white and slightly gray luster. The color of chromium-manganese-nitrogen stainless steel is similar to that of chromium-nickel stainless steel, but slightly lighter. Stainless steel sculptures are not pickled The surface color of chromium-nickel steel is brown and white; chromium steel is brown and black. chromium, manganese and nitrogen are black (the three colors refer to the color with high degree of oxidation). cold-rolled non-annealed chromium-nickel stainless steel, silver The white surface is reflective. Stainless steel is generally pickled except for yuan steel. 2. Chemical qualitative method identification The chemical qualitative method is an identification method to identify whether the magnetic stainless steel door material contains nickel. The method includes the following steps: Stainless steel is dissolved in aqua regia, dilute the acid solution with purified water, add ammonia to neutralize, and then gently inject nickel reagent. If red velvet floats on the surface of the liquid, that is, stainless steel contains nickel. If there is no red velvet substance, it means There is no nickel in stainless steel (However, due to the low nickel content in stainless steel, usually only a few percent, the nickel content is not easy to reveal or determine, which can only be grasped after many experiments with standard samples). 3. Identification of iron magnets. French stainless steel can be attracted by magnets in any state. Chrome-nickel stainless steel sculptures are generally non-magnetic in the annealed state, and some will be magnetic after cold working. However, high-manganese steel with high manganese content is non-magnetic. Chromium-nickel-nitrogen stainless steel The magnetism is more complicated: some are non-magnetic, and some are magnetic. The above content is an introduction to the material analysis and identification methods of stainless steel sculptures brought to you by the Beijing sculpture manufacturer. I hope it can help you.