Characteristics of special steel solidification

Characteristic of Special Steels After Solidification

Special steels are steels with superior properties, such as strength and corrosion resistance, which are usually treated with special alloys to form high-strength and high-performance steels. Special steels are mainly used in the manufacture of automobile accessories, machinery, bridge construction, etc. These steels, when solidified, produce a number of special characteristics, which are discussed in this article.

First, special steels typically solidify rapidly, resulting in high wear resistance, thermal shock resistance, and complete micro-structure homogeneity. This is due to their low freezing point, high vaporization pressure, and stable surface tension force. This fast solidification-rate allows for shorter times of production and lower costs.

Second, due to its rapid solidification, special steels have superior wear resistance. High wear resistance is crucial in machinery and automotive parts, as they must resist mechanical stress and friction throughout their lifetime. Special steels produce wear-resistant parts because their high melting point and solidification rate allows parts to form consistent and uniform structures. This increases the strength of the entire parts.

Third, special steels are known for their superior corrosion resistance. This is due to the presence of specific alloys such as chromium, nickel and molybdenum. These elements form a protective layer on the surface of the part, preventing further corrosion from developing. This layer further strengthens the part’s strength and durability.

Fourth, special steels often possess superior magnetic properties, as well as property alteration resistance properties. Magnetic properties are very important for machines and parts that contain engines and motors. Property alteration resistance means that the material remains relatively unchanged even after it has been exposed to a temperature shock or an intense welding operation.

Finally, special steel parts often exhibit superior fatigue life; parts made from special steel typically last longer than parts made from conventional steel. This is because the special alloys present in the steel are able to resist deformation and fatigue better than conventional steel. This greater fatigue and deformation resistance, in turn, increases the overall life of the part.

In summary, special steels, when solidified, exhibit superior wear resistance, corrosion resistance, magnetic properties, and property alteration resistance. The alloys present in these steels also increase their fatigue and deformation resistance, which lengthens the parts’ overall life. As a result, special steels are typically used in the manufacture of automotive and machine parts that require superior properties.

Special steel is a kind of metal material that is subject to special requirements in production and use, usually containing higher requirements for performance than ordinary steel. The quenching of special steels refers to the process of rapidly cooling a workpiece from a high temperature by means of a quenching medium. This process can determine the hardness and microstructure of the workpiece after quenching. It is one of the most important methods for producing wear-resistant and anti-deformation parts.

The quenching of special steels has two common methods: oil quenching and water quenching. The cooling rate of special steel quenching is much faster than that of ordinary steel, because special steels usually require performance with higher temperature resistance and higher hardness.

Oil quenching of special steel requires high requirements of oil cleanliness, temperature, and stirring. Generally, oil with higher boiling point and lower viscosity should be used in order to ensure fast cooling rate of the steel worked, thus forming martensite with higher hardness. The disadvantage of oil quenching is that the cooling rate is slow in the gradient region near room temperature, resulting in higher residual stress and distortion of parts.

Water quenching is a common quenching method for special steels, which require higher cooling rate and is the main quenching method for heat treatment of steel. Compared with oil quenching, water quenching has in advantage in that it has fast cooling rate and can cool down the surface of the steel quickly, which can prevent the plastic deformation of the steel worked and cause less residual stress. The disadvantage is that the cooling rate is too fast, which easily causes cracking of the workpiece, and it requires uniform stirring of the water medium.

To sum up, special steel quenching process usually consists of oil quenching, water quenching and other methods. Oil quenching has the advantage of good cooling rate, while water quenching has the advantage of high cooling speed. Which kind of quenching should be selected depends on the size and properties of the special steel. In general, water quenching is suitable for small workpieces and parts and requires low distortion after quenching, while oil quenching is suitable for larger workpieces and parts requiring higher hardness.