Cutting and drilling of Zirconia
Are you interested in cutting and drilling zirconium from a supplier — the company Electrovek-Steel? At us you will find only the checked up information on the given question
Purchase of zirconium blanks and forgings from the company is offered by Electrovek-Steel. Effective prices are from the manufacturer. The supplier ensures timely delivery of products to any point determined by the customer.
Mechanical properties of zirconium:
- The limit of the temporary resistance to break (samples after annealing) is 330 MPa;
- Yield strength (samples after annealing) — 230 MPa;
- The modulus of elasticity (Young) is 94.5 GPa;
- The Poisson’s ratio is 0.34;
- Relative elongation at tension (sample after annealing) — 32%;
- Brinell hardness HB — 145;
- Hardness according to Rockwell, scale A — 49;
- Hardness according to Rockwell, scale B — 78;
- Vickers hardness is -150.
Basic thermophysical properties: coefficient of thermal expansion in the temperature range 20−100 ° C 5.80 mm / m ° C — 3.22; Thermal conductivity of 16.7 W / mK.
Prepared zirconium and its alloys blanks can be processed both in cold and hot conditions. However, when heated to temperatures above 250… 300 0 C, zirconium reacts actively with atmospheric oxygen. The resulting pores and oxide films impair the machinability of the metal. Therefore, in order to improve the cutting and drilling of zirconium at elevated temperatures, the ingots are peeled off the machine before heating, removing surface defects.
The company Electrovek-Steel is offering to buy zirconium and its alloys forgings and forgings. Effective prices are from manufacturers. The supplier guarantees the prompt delivery of products to any point specified by the consumer.
Separating operations with zirconium billets
Heating zirconium is usually produced in electric furnaces of resistance. Flame heating should be avoided. If heating is carried out for a long time, then the ingot (or blank) is encased. Copper cladding is applied during heating to a temperature of 870 C, and with increasing temperature up to 900… 950 ° C using nickel shell.
The temperatures and duration of heating are determined depending on the dimensions of the billet and the type of alloy, for example ingots of unalloyed zirconium with a diameter of 75… 100 mm, weight (weight) up to 6 kg to a temperature of 800… 850 ° C are heated for an hour. For ingots of such dimensions from a low-alloy alloy, the heating temperature is increased to 850… 950 ° C.
Ingots up to 250 mm in diameter are heated to elevated temperatures (about 1000 ° C), bringing the duration of heating to 2 hours. Heating at temperatures close to 1000 ° C is recommended to be conducted in a vacuum, especially if the diameter of the ingots is large (300 mm), and for the heating of the metal, an exposure time of 2… 4 hours is required at forging temperatures.
For cutting zirconium billets use mechanical / friction saws. If necessary, reduce waste using precise cutting by shear on dies with minimal axial and radial clearance between the blades.
For precise processing of zirconium, laser cutting and laser drilling technologies are used. Such methods are particularly effective for obtaining small holes and cavities in zirconium billets.
Buy zirconium and its alloys at economically beneficial prices from the manufacturers offers the company Electrovek-steel. The supplier guarantees immediate delivery of the products to any address specified by the customer.