Production method of zirconium and zirconium alloy strip coil

A production method and zirconium alloy technology, applied in the field of metallurgy, can solve problems such as difficult rolling, huge differences in weld structure and performance, and strip surface damage, so as to achieve rolling and related cost reduction and uniform surface quality , The effect of shortening the production period of cold rolling

A production method and zirconium alloy technology, applied in the field of metallurgy, can solve problems such as difficult rolling, huge differences in weld structure and performance, and strip surface damage, so as to achieve rolling and related cost reduction and uniform surface quality , The effect of shortening the production period of cold rolling

CN105032974AActive Publication Date: 2015-11-11BAOJI TUPENG METAL MATERIALS CO LTD
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  • Production method of zirconium and zirconium alloy strip coil
  • Production method of zirconium and zirconium alloy strip coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: First, heat a zirconium strip slab of 180х1050х7100mm in a walking gas heating furnace for 4 hours, heat it to 850°C, keep it warm for 2 hours, and roll it out of the furnace with a 1800 four-roller reversible double-stand double-steel hot rolling mill. The billet is made, rolled to a thickness of 40mm after 8 passes, rolled into a coil in the furnace, and rolled to a thickness of 4mm after 5 passes;

[0029] Then, the zirconium belt with a thickness of 4mm, a width of 1050mm and a weight of about 8.73 tons is pulled through the 1450mm annealing-shot peening-pickling unit for annealing and surface treatment. min, the shot peening speed reaches 90m / s. The ratio of pickling solution is: H 2 O-62%: HF3%: HNO 3 -35, the processing line speed of the unit is 20m / min.

[0030] The chemical composition of zirconium tape is as follows:

[0031]

Embodiment 2

[0032] Example 2: First, heat a 205х1150х7040mm zirconium alloy strip slab in a walking gas heating furnace for 4 hours, heat it to 850°C, keep it warm for 2 hours, and use a 1800 four-roller reversible double-stand double-steel coil hot rolling mill The billet is rolled and rolled to a thickness of 40mm after 9 passes, rolled into a furnace coil and rolled to a thickness of 3.2mm after 7 passes.

[0033] Then, a zirconium alloy strip with a thickness of 3.2mm, a width of 1150mm, and a weight of about 10.79 tons is pulled through a 1450mm annealing-shot peening-pickling unit by a welding leader for annealing and surface treatment. 1300Kg / min, shot peening speed up to 55m / s, pickling solution ratio: H 2 O-67%: HF3%: HNO 3 -30, the processing line speed of the unit is 45m / min.

[0034] The chemical composition of zirconium alloy coils is as follows:

[0035]

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Abstract

The invention provides a production method of a zirconium and zirconium alloy strip coil. The production method comprises the steps that a zirconium or zirconium alloy strip blank is heated in a heating furnace before production and is rolled on a steekle mill or a tandem rolling unit to the thickness that the blank can be transferred to a cold mill to be rolled, and the blank is directly coiled; surface treatment is carried out on a hot-rolling zirconium coil obtained through rolling on a continuous annealing-shot blasting-acid pickling production line, and a zirconium strip obtained after surface treatment is a smooth and clean zirconium strip which is in the metal natural color and free of oxide skin or harmful air suction layers; then a cold mill unit is adopted for carrying out cold rolling on the zirconium strip to obtain a thin strip, and cold rolling is carried out after annealing is carried out in an on-line annealing or vacuum annealing manner in the process of cold rolling; and finally various finished zirconium or zirconium alloy thin strip products of target thickness are obtained in a rolled manner. According to the production method, the cost is low, the product quality is good, and the rate of the finished products is improved by more than 15%; the requirements of nuclear power, chemical engineering and other aspects for thin zirconium materials and zirconium strips for thin-wall zirconium pipe welding can be completely met; and energy saving and consumption reduction are achieved, and high practical value is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of zirconium and zirconium alloy coils. Background technique [0002] At present, the production of zirconium and zirconium alloy coils adopts the production method of splicing strips at home and abroad, that is, the zirconium slab is first rolled into a thickness of 1.0-2.0mm, a length of 1000-4000mm, and a width of 400-1000mm by hot rolling and cold rolling. Then cut the above zirconium plate into slabs, use the method of argon arc welding to tailor weld along the length direction to form a long strip with the required width of the finished product and roll it up to form a coil, and then roll it to a certain thickness through a strip rolling mill or thinner strip, the disadvantages of this method are as follows: First, the strip has multiple welds throughout the length, and the structure and properties of the welds are very different from the ...

Claims

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Application Information

Patent Timeline
11 Nov 2015
Publication
CN105032974A
IPC
B21C37/02
Inventors
唐普放; 杨艾琴