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Introduction to Zirconium Welding Wire
Zirconium wire is an important alloying element of magnesium alloy, which can improve the tensile strength and processing performance of magnesium. Zirconium wire is a modifier for aluminum-magnesium alloys, which can refine grains.
Characteristics of Zirconium Welding Wire
1. Zirconium wire has good thermal conductivity, and the reaction of thermal expansion and cold contraction is small in the application. The thermal conductivity of zirconium wire has become important information in the electronic and electrical equipment manufacturing industry, and of course it is also fully utilized in other industries.
2. Zirconium wire is flammable in the air, and ZIRCONium wire is an available additive for high-quality steel deoxidized zirconium sulfur, and is also a component of armor steel, gun steel, stainless steel and heat-resistant steel
3. Zirconium wire can absorb a large amount of oxygen, hydrogen, ammonia and other gases when heated. In the vacuum tube, zirconium powder is used as a degassing agent, and zirconium wire and zirconium sheets are used as ideal getters for door brackets and anode brackets. Glitter powder is produced when iron powder is mixed with zirconium nitrate. Most are used as packaging for uranium fuel assemblies in nuclear reactors. Also photographs flash and corrosion resistant vessels and piping, especially hydrochloric and sulfuric acids. Zirconium chemicals can be used as crosslinkers for polymers.
| Standard | ASTM B550, ASTM B351 |
| Grade | R60702, R60704, R60705 |
| Technique | Hot Rolled, Cold Rolling, Annealed |
| Straight | Dia.: 1.0mm-5.0mm |
| Coiled | Dia.: 0.05mm-3.0mm |
| Length | Coils or Customers’ Requests |
| Surface | Black, Pickled, Polished ( For Dia. >1mm ) |
| Chemical Composition,% | |||||
| Zr 702 | Zr 704 | Zr 705 | Zircaloy-2 | Zircaloy-4 | |
| Sn | / | 1~2% | 1~2% | 1.2~1.7% | 1.2~1.7% |
| Fe | <0.05% | 0.1~0.2% | <0.05% | 0.07~0.2% | 0.07~0.2% |
| Cr | <0.05% | 0.1~0.2% | <0.01% | 0.05~0.15% | 0.05~0.15% |
| Ni | / | / | / | 0.03~0.08% | <0.007% |
| Hf | 1~2.5% | <4.5% | <4.5% | <200ppm for Nuclear industry | <200ppm for Nuclear industry |
| Nb | / | / | 2~3% | ||
| Zr+Hf | ~99.5% | ~97.5% | ~95.5% | ~98% | ~98% |
Physical Constants and Thermal Properties
Density
g/cm3
6.51
Melting range
°C
1852
Thermal conductivity
W/(m°K)
22.7
Specific heat
J/kg•°C
275
Electrical resistivity
ohm -cm
3.97E-03
Modulus of elasticity
GPa
99.2
Poisson ratio
0.35
Coefficient of expansion
5.89 x 106
The physical properties of zirconium wire
If the elastic modulus is low, the welding stress is small, the melting point is high, the welding line energy needs to be high, the linear expansion coefficient is small, the welding deformation is small, and the welding part with high thermal conductivity has good heat dissipation, low specific heat, small heat absorption at the welding part, and surface tension. big, zirconium
Zirconium wire is an active metal with a high affinity with oxygen, so it forms a protective oxide film in the air at room temperature, and through the oxide film, zirconium and its alloys have excellent corrosion resistance. Zirconium with excellent corrosion resistance has strong resistance to many corrosive media, and has good mechanical properties and heat transfer properties, as well as significant cost advantages, so it has become an excellent corrosion-resistant structural material in the petrochemical field today.
Material
State
Rm(≥)/MPa
Rp0.2(Pa
A50mm(≥)/%
Zirconium 702 (UNS R60702)
Annealed
379
207
16
Zirconium 704 (UNS R60704)
Annealed
413
241
14
Zirconium 705 (UNS R60705)
Annealed
552
379
16
Zirconium welding wire process
Pure zirconium wire is a zirconium wire made by cold drawing large-scale zirconium rods with a diameter of more than 3mm. Alloying elements can increase the strength of zirconium wire. When the alloying elements exceed the solubility, intermetallic compounds or second phase structures will be formed, which may lead to a decrease in the elongation of the zirconium wire and reduce the corrosion resistance of the alloy.
Melting ingot - steel billet - forging - rolling rod - grinding - coating protection - annealing - drawing - pickling or polishing - vacuum annealing
Application of Zirconium Welding Wire
Industrial zirconium wire is widely used in various corrosion-resistant process equipment, mainly used in pressure vessels, pipes, tanks, heat exchangers, shafts, mixers and other mechanical equipment and valves, pumps, sprayers, trays, demisters and zirconium tar zirconium industry According to statistics, roughly only objects are processed into the shape of zirconium or zirconium sponge, and then processed into zirconium alloys for nuclear fuel components or industries. In terms of processing difficulty, science and technology, etc., the zirconium industry chain is the most high-end.
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