CR12 die steel is a high-carbon, high-chromium cold-work die steel with excellent wear resistance, hardenability and toughness. Its density is one of the important parameters to measure its quality, and it has an important impact on the production and use process. This article will provide a detailed analysis of the density of CR12 die steel.
1. The density of CR12 die steel.
The density of CR12 die steel is generally 775～7.80g cm. The magnitude of the density depends on its chemical composition and smelting process, and is also affected by temperature and pressure. In practical application,CR12 die steelThe density is usually measured by the liquid slag discharge method, that is, after the CR12 mold steel is melted, its mass is measured through slag discharge and cooling solidification, so as to calculate its density.
2. The influence of density on the properties of CR12 die steel.
Density has an important influence on the properties of CR12 die steel. First of all, the density directly affects the hardness and wear resistance of CR12 die steel. The harder and more wear resistance the steel, the higher the density. Secondly, the density also affects the toughness and impact resistance of CR12 die steel. Within a certain range, as the density increases, the toughness and impact resistance of the steel will also increase. However, if the density is too high, it will cause the toughness of the steel to decrease and it will be easy to brittle. Therefore, in the production and manufacture of CR12 die steel, its density should be reasonably controlled to achieve the best performance.
3. Density change of CR12 die steel at different temperatures.
With the change in temperature,CR12 die steelThe density will also change. Generally speaking, as the temperature increases, the density of CR12 die steel will gradually decrease. Therefore, when using CR12 die steel in a high-temperature environment, it is necessary to pay attention to the change in its density to avoid performance fluctuations caused by density changes. At the same time, when using CR12 die steel in a high-temperature environment, it is also necessary to pay attention to the changes in its performance indicators such as thermal fatigue resistance and softening resistance.
Fourth, the method of improving the density of CR12 die steel.
In order to improve the density of CR12 die steel, the following methods can be adopted:
1.Increase the content of carbon and chromium: Increasing the content of carbon and chromium can increase the density of CR12 die steel, thereby improving its hardness and wear resistance. However, this method will also cause the toughness of the steel to decrease, and it is easy to brittle. Therefore, it is necessary to control the proportion of carbon and chromium content reasonably.
2.Addition of alloying elements: Adding the right amount of alloying elements can increase the density of CR12 die steel, while also improving its toughness and impact resistance. For example, the addition of tungsten, vanadium and other elements can improve the hardness and wear resistance of steel;The addition of titanium, aluminum and other elements can improve the toughness and impact resistance of steel.
3.Adjust the smelting process: The density of CR12 die steel can also be improved by adjusting the smelting process. For example, the use of vacuum smelting, electroslag remelting and other processes can improve the purity of steel, thereby increasing its density. At the same time, the use of appropriate heat treatment process can also improve the density and mechanical properties of CR12 die steel.
In conclusion, the density of CR12 die steel has an important impact on its properties. In practical applications, it is necessary to reasonably select and control the density of CR12 die steel according to the specific use environment and requirements to achieve the best performance. At the same time, it is also necessary to strengthen the research on its density change law and the exploration of control methods to continuously improve the quality and service life of CR12 die steel.
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