Introduction
Microcrystalline hard alloys are a class of materials which are composed of a mixture of hard particles and a metallic binder. The alloys are particularly suitable for high-performance structural applications, as the hard particles provide improved mechanical properties and the metallic binder provides ductility. Microcrystalline hard alloys are used in various applications, such as cutting tools and wear-resistant components.
Manufacturing of Microcrystalline Hard Alloys
Microcrystalline hard alloys can be produced using a variety of processes. The most commonly used process is hot isostatic pressing (HIP). In this process, an appropriately sized powder mixture is pressed into a preform and then subjected to a high temperature and pressure. The microcrystalline hard alloy resulting from this process is then machined into the desired shape. Another process used in the manufacture of microcrystalline hard alloys is sintering. In the sintering process, powder particles are heated to form a solid mesh of small crystals. This powder is then placed in a heated mold and subjected to compaction and sintering.
Properties of Microcrystalline Hard Alloys
The microcrystalline hard alloys are characterized by superior mechanical properties. The alloys have high strength, wear-resistance, toughness, and thermal and shock resistance. In addition, microcrystalline hard alloys have a low coefficient of thermal expansion, which makes them suitable for use in applications where high temperatures are encountered. The alloys have a low coefficient of friction and are resistant to corrosion and erosion.
Applications of Microcrystalline Hard Alloys
Microcrystalline hard alloys are widely used in various applications. They are used to manufacture cutting tools, wear-resistant components, and precision instrument parts. In addition, the alloys are used to manufacture parts for the aerospace and automotive industries. The alloys are also used in the medical and nuclear industries.
Conclusion
Microcrystalline hard alloys are a class of materials, composed of hard particles and a metallic binder, which provide improved mechanical properties and ductility. The alloys can be produced through a variety of processes, such as hot isostatic pressing and sintering. Microcrystalline hard alloys are characterized by high strength, wear-resistance, toughness, and thermal and shock resistance. They are widely used in various applications, such as cutting tools and parts for the aerospace, automotive, and nuclear industries.
