1. What are the heat-resistant steels?
1. Heat-resistant steel is divided into martensitic heat-resistant steel, ferritic heat-resistant steel, austenitic heat-resistant steel, precipitation-strengthened heat-resistant steel, and heat-resistant alloy. There are many types of heat-resistant steel, and different use environments have different requirements for heat-resistant performance, such as the material used in the engine of the car is martensitic heat-resistant steel.
2. Maraging heat-resistant steel - this kind of steel has a chromium content of 7~13%, below 650 °C, it has high high temperature strength and water vapor corrosion resistance, and its disadvantage is that it is poor in weldability, such steel grades are: 1Cr11MoV, 1Cr12WMoV, 4Cr10Si2Mo, etc.
3. Metal materials with high temperature resistance of 1500 degrees, that is, metals with a melting point of more than 1500 degrees include tungsten, rhenium, osmium, tantalum, niobium, iridium and other metals. Tungsten, a metallic element. Atomic number 74, atomic weight 1884.
4. Heat-resistant steel and stainless acid-resistant steel have crossed each other in the scope of use, and some stainless steels have the characteristics of heat-resistant steel, which can be used as stainless acid-resistant steel and heat-resistant steel. Heat-resistant steelAlloy steel with high strength and good chemical stability at high temperatures.
5. Therefore, the working conditions of the reheater are worse than those of the superheater. Therefore, in the past, the reheater of the continental boiler was mostly designed as a convection type, which was arranged in the medium-temperature smoke area, and the high-temperature section was mostly arranged downstream, and good heat-resistant steel was selected.
And there is a special bypass protection system to ensure the safety of fault shutdown and boiler start and stop.
6. There are many classifications of different types of cemented carbide cutters and tools, such as carbide cutters, which are divided into turning tools, milling cutters, planer cutters, drills, boring cutters, etc., which are used to cut cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, and can also be used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel and other difficult-to-process materials.
2. What are the high-temperature resistant steels?
1. Martensitic hardening steelMartensitic hardening steel is a steel with high strength and high hardness, which can maintain stable hardness and strength under high temperature conditions. Its main advantages include high wear resistance, high strength, high impact resistance, and high corrosion resistance. Therefore, it has a wide range of applications in automobile manufacturing, machinery manufacturing, cutting and other fields.
2. Tungsten carbide steel is also a common high-temperature resistant steel, and its alloying elements are mainly carbon and tungsten. It also has high hardness and wear resistance at high temperatures. An important feature of tungsten carbide steel is that it is resistant to high-temperature deformation, especially suitable for high-temperature, high-pressure, and high-load application environments.
3. 16Mo316Mo3 is a commonly used high-temperature resistant steel plate model, which belongs to hot-strength steel. It has good high-temperature strength and oxidation resistance, and can still maintain good mechanical properties at high temperatures. 16Mo3 is widely used in petroleum, chemical, electric power and boiler industries, especially suitable for manufacturing high-temperature and high-pressure vessels.
4. H13 steel: H13 steel is a commonly used high-temperature resistant die steel, which has excellent heat resistance and wear resistance. It is suitable for manufacturing punching dies, extrusion dies, die-casting dies, etc. under high temperature working conditions. P20 steel: P20 steel is a high-quality high-temperature resistant die steel with good cutting performance and wear resistance.
5. 304H high-temperature stainless steel maintains good corrosion resistance and heat resistance in high-temperature environment, and can be used to manufacture high-temperature stoves, heat exchangers and other high-temperature equipment. 321H Stainless Steel: 321H stainless steel is specially treated on the basis of 321 stainless steel.