NS3308 is a high-performance material, which can operate stably for a long time in various harsh environments, and is widely used in marine engineering, chemical industry, petroleum, nuclear industry and other fields.
1. Material structure and characteristics.
1.Material Structure:
NS3308 is a nickel-based alloy, mainly composed of nickel, chromium, molybdenum, cobalt and other metal elements, its chemical composition is shown in the following table:
Element. Content (%) Nickel.
Chromium. Molybdenum. Cobalt. Iron.
Copper. Tin. Carbon. Sulfur.
Phosphorus. 2.Features: The NS3308 has the following features:
1) Excellent corrosion resistance: in harsh environments such as strong acid, strong alkali, high temperature and high pressure, seawater, etc., it has good corrosion resistance and is not easy to rust and corrode.
2) Good thermal stability: At high temperatures, the material is not easy to deform, melt or oxidize, and has good thermal stability.
3) Excellent mechanical properties: It has high strength, hardness, toughness and other mechanical properties, and is suitable for use under working conditions such as high strength, high temperature and high pressure.
4) Good processing performance: NS3308 is easy to process, cast, forge, cold draw, hot rolling, cold rolling, etc., and manufacture into various complex parts.
2. Mechanical properties.
The mechanical properties of NS3308 are shown in the table below
Performance. Index.
Tensile strength (MPa).
Yield Strength (MPa).
Elongation (%)
Impact value (j).
Hardness (hb).
3. Manufacturing process.
1.Plate Manufacturing:
Sheet metal manufacturing is a conventional processing method of NS3308, which is widely used in the manufacture of various structural parts, containers, pipes, etc. Plate manufacturing usually uses hot rolling, cold rolling, cold drawing and other methods to make plates of various specifications and sizes.
2.Manufacture of round bars:
Round bar manufacturing is an important manufacturing process of NS3308, which is widely used in the manufacture of bearings, gears, bolts and other parts. Round steel manufacturing usually uses hot rolling, cold drawing and other methods to make round steel of various specifications and sizes.
3.Forging manufacturing:
Forging manufacturing is an important manufacturing process of NS3308, which is widely used in the manufacture of high-temperature and high-pressure vessels, turbine blades, aircraft engine blades and other parts. Forgings are usually manufactured by hot forging and cold forging to make forgings of various specifications and sizes.
4.Seamless Tube Manufacturing:
Seamless pipe manufacturing is an important manufacturing process of NS3308, which is widely used in the manufacture of high-temperature and high-pressure pipelines, chemical containers, nuclear power plant pipelines, etc. Seamless tube manufacturing usually uses hot rolling, hot extrusion and other methods to make seamless tubes of various specifications and sizes.
5.Forged Ring Manufacturing:
Forged ring manufacturing is an important manufacturing process of NS3308, which is widely used in the manufacture of ship bearings, gears, aircraft structural parts and other parts. The manufacturing of forging rings usually adopts free forging, die forging and other methods to make forging rings of various specifications and sizes.
Fourth, the experimental method and conclusion.
1.Difference Between Casting and Forging:
Casting is the pouring of molten metal into a sand mold, and the product is formed after it cools and solidifies. Forging is the shaping of a metal blank under pressure, changing its shape by hammering, pressure, etc.
2.Smelting process:
The smelting process of NS3308 mainly includes smelting, drying, casting, heat treatment and other steps. Melting is the process of melting a metal blank into liquid metal, and drying is the drying of liquid metal at high temperatures to remove impurities and gases in it.
3.Cold-rolled, hot-rolled and cold-drawn:
Cold rolling is the process of rolling a plate at room temperature to make it thinner and smoother. Hot rolling is the process of rolling a sheet at a high temperature to make it thin and flat. Cold drawing is to put the metal blank into the steel pipe, and make it into a seamless pipe with a specified size and outer diameter by drawing.
4.Electroslag and electric furnaces:
Electroslag is to put the steel blank into the electroslag furnace, heat and melt it by arc heating, and add welding rod or other materials to the molten pool to form the desired product. The electric furnace is to put the steel blank into the electric furnace, heat and melt it by means of resistance heating, and add other materials to the molten pool to form the desired product.
Based on the above analysis, NS3308 is a high-performance material with excellent corrosion resistance, thermal stability, mechanical properties and processability. Its manufacturing process includes plate manufacturing, round bar manufacturing, forging manufacturing, seamless tube manufacturing, forging ring manufacturing and other methods, which can be made into various complex parts. In the smelting process, it is necessary to pay attention to controlling the melting temperature, casting temperature and other parameters to ensure the quality of the material. In the processing process, it is necessary to choose different processing methods and technological processes according to the actual requirements to meet customer needs.