Industry news_Industry news_Hunan Rhenium Alloy Material Co., Ltd.

The strengthening effect of rhenium in tungsten carbide-cobalt (WC-Co) hard alloy and the application prospect of superhard alloy materials

Tungsten carbide-cobalt (WC-Co) hard alloy is a material with high hardness, excellent wear resistance, and high corrosion resistance. It mainly consists of tungsten carbide (WC) particles and cobalt (Co) metal phase. Tungsten carbide is an extremely hard ceramic material with very high hardness and wear resistance. However, pure tungsten carbide is brittle and difficult to process and use. Therefore, to improve its toughness and processability, tungsten carbide is usually mixed with cobalt powder and then sintered through a high-temperature sintering process. Cobalt acts as a binder between tungsten carbide particles, increasing the alloy's toughness and ductility. Cobalt also helps to enhance the alloy's corrosion resistance, making it more suitable for applications in various harsh environmental conditions.

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The strengthening effect of rhenium in molybdenum-based alloys and the application prospects of molybdenum-rhenium alloy materials.

 Time of issue: : 2023-07--07

As one of the representatives of high-temperature alloys, molybdenum-based alloys have been widely used in aerospace, nuclear industry, chemical industry, and other fields. However, there are still some limitations in the mechanical properties and high-temperature stability of molybdenum-based alloys, which has prompted researchers to explore new alloy design strategies and methods of adding alloying elements. Rhenium, as a high-melting point and high-density transition metal, possesses excellent oxidation resistance and corrosion resistance, and thus has been extensively applied in high-temperature alloys. Studies have shown that the addition of rhenium to molybdenum-based alloys can significantly improve the strength, plasticity, and high-temperature stability of the alloys. Furthermore, molybdenum-rhenium alloy materials have broad prospects in aerospace, nuclear industry, and other fields due to their high strength, high temperature durability, and good corrosion resistance. This article will introduce the strengthening effect of rhenium in molybdenum-based alloys and discuss the application prospects of molybdenum-rhenium alloy materials.

The strengthening effect of rhenium in tungsten-based alloys and the application prospects of tungsten-rhenium alloy materials.

 Time of issue: : 2023-06--28

By adding rhenium to tungsten, the tungsten-rhenium alloy benefits from the "rhenium effect" and demonstrates a range of excellent properties including high melting point, high hardness, high strength, high ductility, high electrical resistivity, high thermoelectric potential, high recrystallization temperature, low vapor pressure, low electron emission work function, and low ductile-to-brittle transition temperature.

The logical relationship - Strengthening Effect(rhenium effect) of Superalloys and Rhenium

 Time of issue: : 2023-06--21

High-temperature alloy, also known as heat-resistant alloy or superalloy, refers to a type of metallic material that is composed primarily of iron, nickel, and cobalt. It is capable of long-term operation under high temperatures of 600℃ or above, as well as certain levels of stress. High-temperature alloys possess high strength at elevated temperatures, good oxidation and corrosion resistance, as well as excellent performance in fatigue and fracture toughness. Based on the matrix composition, they can be categorized into three types: iron-based, nickel-based, and cobalt-based alloys. Regarding the production methods, high-temperature alloys can be classified as cast high-temperature alloys, wrought high-temperature alloys, and powder metallurgy high-temperature alloys. Furthermore, they can be strengthened through mechanisms such as solid solution strengthening, dispersion strengthening, precipitation strengthening, and grain boundary strengthening.

Can Osmium (OS) Replace Rhenium (Re) as The Most Important Strengthening Element in Nickel-Base Single Crystal Superalloys?

 Time of issue: : 2023-03--20

Recently, a team of Central South University including Professor Huang Zaiwang and Professor Zhang Lijun published a paper in ACTAMATERIALIA, reporting the latest research trends: the creep resistance and phase stability of nickel-base single crystal superalloy are improved by replacing Re with OS. So, how likely is it that osmium (OS) will replace rhenium (Re) as the most important strengthening element in ni-base single crystal superalloys in practical production and application? Let's read through the core meaning of this paper.

Application of Rhenium in Nickel-based Superalloys

 Time of issue: : 2023-03--02

as a rare and refractory metal, rhenium comes into being in nature in association with metallic minerals such as molybdenum and copper. Rhenium has high melting point, high strength, good plasticity and stable mechanical properties and is widely used in single crystal superalloys for aero-engine turbine blades due to the "rhenium effect" caused by the addition of rhenium. Besides, the scarcity of reserves and the difficulty of processing and obtaining result in its high price, so many countries regard it as a strategic element. Currently, the superalloy industry is the largest consumer of rhenium, accounting for about 80% of the total, and with the rapid development of human aerospace industry, the consumer market demand for rhenium resources at a growth rate of 5% annually, leading to more attention to the application of rhenium. In order to alleviate the growing tension in rhenium resources, diversified enrichment and separation methods, the use of alternative elements, low rhenium as well as rhenium recycling and other emerging technologies have been gradually developed to make rhenium metal more fully available.