Zirconium Alloys: Properties, Processing Technology And Application Outlook

Zirconium alloys, as an important metallic material, are found in the earth's crust at a content of about 0.026%, which is 2.5 times that of copper. Their unique physical and chemical properties, such as high melting points, moderate densities, excellent strength, low coefficients of expansion and small modulus of elasticity, as well as corrosion resistance in a wide range of media, make them important in modern industry.
I. Performance characteristics of zirconium alloys
Zirconium alloys are known for their high melting point, corrosion resistance, excellent strength and processing properties. In particular, two types of zirconium alloys, Zr-Sn system and Zr-Nb system, with relatively mature production processes and grades such as Zr-2, Zr-4 and Zr-2.5Nb, are widely used in various industrial fields.
Processing technology of zirconium alloy
The processing technology of zirconium alloys mainly includes two kinds of extrusion molding and forging molding.

Zirconium alloy extrusion molding
Zirconium alloy tubes and bars are important structural materials in nuclear reactors, accounting for about 75%~80% of the total amount used. These tubes and bars are mainly produced by extrusion molding process. Special lubricants have been developed to optimize the extrusion process and reduce product defects.
Zirconium alloy forging and forming
Forging is a key step in the production of zirconium alloys and is designed to break up the as-cast organization and improve metal properties. The forging process involves a number of parameters such as heating specifications, forging temperature and forging equipment. The forging temperature is generally controlled at 950-1100 ℃, using medium and high temperature resistance furnace for heating.
Third, zirconium alloy application areas
Nuclear industry
Zirconium alloy is used in nuclear reactors as key components such as fuel casing tubes and control rods guide tubes, and its low neutron absorption cross-section and excellent corrosion resistance make it an indispensable material in the nuclear industry.
Deep sea and space exploration
Zirconium alloys have great potential for use in special environments such as deep sea and space exploration due to their small coefficient of thermal expansion and resistance to irradiation damage.
Chemical industry
Zirconium alloys are highly corrosion-resistant to various acidic environments, so they are widely used in the chemical industry for valves, acid-resistant pumps and other equipment.
Dental field
Zirconia ceramics are important materials in the dental field due to their chemical stability and biocompatibility.
Biomedical
α+β dual-phase and β single-phase zirconium alloys have good biocompatibility with human tissues, and are potential choices for surgical implantation alloys.
IV. Key to zirconium alloy plastic molding technology
Zirconium alloy plastic forming methods include forging, extrusion and rolling. There are many factors affecting its plastic processing deformation, mainly including strain rate, temperature and lubrication conditions. Optimizing these parameters is crucial for improving the processing efficiency and product quality of zirconium alloys.
With the continuous progress of technology and market expansion, the application prospect of zirconium alloy will be more broad. In the future, zirconium alloy will show its unique advantages and value in more fields.