The mechanical properties of nickel-chromium alloy cast steel for high temperature according to the American Standard
Introduction
Nickel-chromium alloy cast steel has been widely used in many industries, such as aviation, aerospace and petrochemical, due to its excellent mechanical properties at high temperature. At present, the development and application of nickel-chromium alloy cast steel in the world are being paid more and more attention. Therefore, it is of great significance and practical value to study the mechanical properties of nickel-chromium alloy cast steel at high temperature according to the American Standard.
Definition
Nickel-chromium alloy casting steel, also known as high-temperature heat-resistant steel, is a heat-resistant and anti-oxidation steel generally used in industrial furnaces and other high-temperature atmospheres. It is made of nickel-chromium alloy steel with the addition of chromium or nickel-chromium-molybdenum alloy steel.
Heat treatment process
The heat treatment process of nickel-chromium alloy cast steel is relatively complicated. Firstly, it should reach the required preheating temperature for a certain time without overheating, and then heat it according to the preheating temperature curve, so as to make it reach the uniform temperature in the whole steel ingot, and then cool it at a certain speed. Finally, it should be annealed to obtain the required properties.
Mechanical properties
1. The strength of the material at high temperature, which is an important index to measure the performance of high temperature materials. High temperature is an important criterion to measure the mechanical properties of materials.
2. Dilatation is a very important part of testing mechanical properties. It is the ability of materials to withstand temperature changes. Generally speaking, the more dilatability, the better the resistance to thermal stress and the better the overall performance of materials.
3. Impact toughness is an important indicator to measure the quality of high temperature materials. This is because the resistance of materials to impact fatigue is one of the important factors to measure the performance of materials.
4. Wear and tear resistance is also an important indicator to measure the performance of high temperature materials. According to the American Standard, the test of wear resistance should include abrasive wear, corrosion wear and fatigue, so that the wear and tear resistance of nickel chromium alloy cast steel at high temperature can be evaluated.
Conclusion
In summary, the mechanical properties of nickel-chromium alloy cast steel at high temperature according to the American Standard includes the strength of the material at high temperature, dilatation, impact toughness and wear resistance. The heat treatment process of nickel-chromium alloy cast steel is relatively complicated. These mechanical properties are important indicators of the performance of high temperature materials and can provide guidance for the use of nickel-chromium alloy cast steel at high temperatures.
