Stainless steel is an alloy steel with excellent corrosion resistance, which is often used in the production of equipment and structural parts in the fields of chemical, pharmaceutical, food, machinery and other fields.
1. The basic parameters of X15CRNISI20-12.
X15CrNiSi20-12 is a chromium-nickel stainless steel, its chemical composition is: C 015，si ≤ 1.00，mn ≤ 2.00，p ≤ 0.040，s ≤ 0.030，cr 19.00~21.00，ni 11.00~13.00，nb ≤ 0.60。Its material number is 14828, the international standard is ASTM A240, EN 10088.
2. Problems encountered in the use of X15CRNISI20-12.
When using x15crnisi20-12, the following issues are commonly encountered:
1.Welding deformation is highly susceptible and requires appropriate welding processes and equipment to reduce deformation.
2.Intergranular corrosion is prone to occur in high-temperature environments, so it is necessary to pay attention to controlling the use temperature and environment.
3.It has poor heat resistance and is not suitable for use at high temperatures for a long time.
3. Metallographic structure of X15CrNiSi20-12.
The metallographic structure of X15CrNiSi20-12 is mainly austenite with a small amount of ferrite. At high temperatures, it also produces a small amount of phase and Cr2N phase. In addition, some non-metallic inclusions, such as oxides and sulfides, will occur in this stainless steel.
4. Material structural properties of X15CrNiSi20-12.
The material structure characteristics of X15CrNiSi20-12 are mainly as follows:
1.It has excellent corrosion resistance, especially in acidic and chloride environments.
2.It has excellent antioxidant properties and is not easy to oxidize when used at high temperatures for a long time.
3.It has high tensile strength and yield strength.
4.It has certain malleability and deep drawability.
5.It has good machinability and is easy to cut, drill and mill.
5. Mechanical properties of X15CrNiSi20-12.
The mechanical properties of X15CrNiSi20-12 are as follows:
1.Tensile strength b: 590MPa.
2.Yield strength 02：≥240mpa。
3.Elongation δ5: 40%.
4.Hardness: 217HB.
6. X15CRNISI20-12 plates, round bars, forgings, seamless pipes, forging rings and other forms.
The products of X15CRNISI20-12 are available in the form of plates, round bars, forgings, seamless pipes, forging rings, etc. Among them, plates and round bars are usually used in machinery and equipment manufacturing, forgings and seamless pipes are often used in high-end fields such as chemicals, petroleum, and medicine, and forged rings are usually used in aerospace and other fields.
7. Experimental methods and conclusions of X15CRNISI20-12.
In order to study the performance of X15CrNiSi20-12, the following experimental methods are commonly employed:
1.Metallographic analysis: The metallographic structure of the metallographic microscope was observed.
2.Chemical composition analysis: The chemical composition of the chemical composition is analyzed by chemical analysis methods.
3.Mechanical property test: Tensile test and other methods are used to test its mechanical properties.
The experimental results show that X15CrNiSi20-12 has excellent corrosion resistance and mechanical properties, and is suitable for mechanical equipment, chemical industry, medicine and other fields.
8. The difference between casting and forging, smelting process, how to cold roll, hot rolling and cold drawing, how to electroslag and electric furnace.
Casting and forging are common manufacturing processes, and their difference is that casting is pouring molten metal into a casting mold, whereas forging is heating the metal and then processing it into shape with a hammer or press. The smelting process of X15CrNiSi20-12 includes electric arc furnace smelting and inductance furnace smelting. Cold rolling, hot rolling, and cold drawing are commonly used metal processing methods, where cold rolling is carried out at room temperature, hot rolling is carried out at high temperature, and cold drawing is the drawing of metal bars or tubes. Electroslag furnace and electric furnace are commonly used steel smelting equipment, in which the electroslag furnace melts the metal under the action of the electric arc, and then separates the impurities through the action of the slag, while the electric furnace heats and refines raw materials such as pig iron and scrap steel.
Summary: X15CRNISI20-12 is an alloy steel with excellent corrosion resistance and mechanical properties, which is suitable for mechanical equipment, chemical industry, medicine and other fields. In the process of use, it is necessary to pay attention to its welding deformation, intergranular corrosion and other problems. The stainless steel products are in the form of plates, round bars, forgings, seamless pipes, forging rings, etc. Its manufacturing processes include casting and forging, and smelting processes include electric arc furnace smelting and inductance furnace smelting. In addition, it is necessary to master processing methods such as cold rolling, hot rolling and cold drawing, as well as steel smelting equipment such as electroslag furnaces and electric furnaces.