Influence on the heat resistance of alloys
Are you interested in the influence of various factors on the heat resistance and heat resistance of alloys from the supplier company AvecGlob? Here you will find the necessary information on this topic.
Mechanism of high-temperature strength of alloys
Heat-resistant and heat-resistant are considered to be steels and alloys, which have a high degree of creep resistance and strength at high temperatures. They are used as a building material for parts of internal combustion engines, steam and gas turbines, jet engines and nuclear power plants. The high thermal stability of alloys is determined by two basic physical factors: the strength of the interatomic bonds in the alloy and the alloy structure.
The structure required for high strength is usually obtained by heat treatment, which leads to heterogenization of the microstructure, most often hardening. In this case, the amplification is mainly due to the appearance in the alloy of evenly distributed very small particles of chemical compounds (intermetallides, carbides and other compounds) and microscopic distortions of the crystal lattice of the alloy base due to the presence of particles. The corresponding structure of high-temperature and heat-resistant alloys slows the formation and movement of dislocations, and also increases the number of bonds between atoms that simultaneously participate in the resistance to deformation. On the other hand, a large number of interatomic bonds allows to retain the required structure for long periods at high temperature.
In accordance with the conditions of use, high-temperature alloys can be divided into three groups:
alloys subject to significant, but short-term mechanical loads (in seconds or hours) at high temperatures,
alloys subjected to loads at high temperatures for tens and hundreds of hours,
alloys designed to work under high loads and high temperatures for thousands of hours.
Structural requirements for alloys vary significantly in accordance with these requirements. For example, any factor that causes an unstable structure of the alloy under operating conditions leads to an acceleration of the processes of buckling and fracture. Therefore, alloys designed for long-term maintenance are subject to stabilizing treatment, which makes them more resistant to long-term loading, although this can lead to a certain decrease in resistance to short-term loads.
Supplier — the company AvekGlob — offers to purchase a range of rolled metal products, manufactured from different grades of heat-resistant steels and alloys. Products can be bought at a price formed on the basis of European and world standards. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.
Classification
Heat-resistant alloys are classified according to their base, which can be nickel, iron, titanium, beryllium and other metals. Classification of the base gives an idea of the operating temperature range, which is 40… 80% of the melting point of the base, depending on the load applied and the duration of its use.
Composite materials (alloys reinforced with dispersed refractory oxide particles or high-strength fibers) are various high-temperature alloys. Such materials are characterized by extremely high stability of their properties, which do not strongly depend on residence time at high temperatures. Depending on their purpose, heat-resistant alloys are manufactured with increased resistance to fatigue and erosion and low sensitivity to cutouts, as well as high thermal stability and short-term high loads. For example, stable alloys for use in space technology should have low volatility.
Supplier — AvekGlob company — offers different types of rolled products from heat-resistant and heat-resistant steels and alloys of domestic and foreign production. The products are offered at affordable prices from the manufacturer. The supplier guarantees the timely delivery of products to any address specified by the consumer.