Pure zirconium has better corrosion resistance than stainless steel, nickel-based alloy, titanium and titanium alloy, and its mechanical properties and technology can be used for corrosion resistance of chemical equipment, especially acetic acid, pesticides, plastics and other industries such as reactors, heat exchangers, chestnut, valve, pipe, etc. The industrial zirconium market is benefiting from the rapid development of China's chemical industry.
The application of industrial pure zirconium composite material can save the amount of zirconium and reduce the cost greatly. Large containers and pipes can be made with zirconium lining, steel cladding or other composite materials. Zirconium - steel composites have been widely used in corrosion resistance equipment. But using zirconium width smaller plate manufacture large equipment often require large amount of welding, welding process not only complex, and organizational performance during the welding process because of the weld area is not stable, weld is often perishable erosion source, fault source, great impact on the safety and service life of equipment, and the width is greater than 1000 mm wide application of thin plate, can effectively reduce weld, improve the safety and service life of equipment, so as to greatly prolong the service life of equipment, into and reduce maintenance costs and greatly shorten the production time, but also shorten the manufacturing cycle of the equipment, reduce the production cost. Before, the width of the pure wrong sheet in China is generally less than 1000mm, and there is no mature technology and stable production process for the wide wrong sheet.
This embodiment includes the following steps: Step 1. The pure zirconium slab with the size of 150mm(thick) X800mm(wide) X 1100mm(long) is heated in a heating furnace. After heating up to 740°C, the pure zirconium slab is kept warm for 120min. Described the first dairy for one-way dairy, described the first dairy total deformation is 81. 67%, described the first dairy is divided into eight times to complete, and the dairy for different rates of lane change shape are: 1, 00%, 16. 30% and 22. 12% and 22. 73%, 26. 47%, 24. 00%, 18. 42% and 11. 29%, described the pure zirconium slab grades for Zr - 1 (R60700);
In step 2, will be mentioned in step 1 first intermediate slab cut to size for 27 5 mm (thickness) X800mm (width) X 1000 mm (length), then the first intermediate plate shear also put in the heating furnace heating, heating the first intermediate slab up to 700 ° C insulation 27 after 5 min, then into the hot milk machine for dairy, the second was the size of 5. 5 mm (thick) X 1000 mm (wide) X4000mm (long) the second intermediate plate also; The milking direction of the second milking is perpendicular to the milking direction of the first milking mentioned in step 1. The total deformation amount of the second milking is 800%. The second milking is completed in 7 steps.
step 3. Cut the second semi-finished slab mentioned in step 2 to a size of 5.5mm (thick) X 1000mm(wide) X2000mm(long), and then return the second semi-finished slab after shearing.
