Method for producing large-sized zirconium ingot with the specification Phi of more than 600mm

Abstract

The invention relates to a method for producing large-sized zirconium ingot with the specification Phi of more than 600mm, and the technical characteristics lie in that a consumable electrode with relatively uniform components is prepared by adopting dosing, mixing and vacuum plasma arc electrode assembly and welding technology, and vacuum consumable electric arc melting is carried out for at least twice by adopting technology of 'speed reducing melting' and 'component uniformity controlling' and the like under the conditions that the melting speed control parameter is 10-40kg / min and the arc stability control is carried out with the magnetic induction of 10-50 Gauss and the stable arc current alternate control time of 1-60 seconds. Compared with the prior art, the invention has the advantages that the large-sized zirconium ingot produced by the invention has uniform and stable chemical components and excellent ingot surface quality, is better than small ingot melted by vacuum consumable electric arc, and has the advantages of high yield, high production efficiency and being easy for producing large zirconium material and the like; and the invention is applicable to producing ingots for large zirconium material.

Description

technical field [0001] The invention relates to a production method of large-sized zirconium ingots of Ф600 mm or more, which belongs to the field of casting technology and is mainly used in metallurgy, petrochemical and other fields, and stably realizes the industrialized batch production of large-sized zirconium ingots of Ф600 mm or larger. Background technique [0002] Zirconium is a transition group element, which belongs to the IV-B group elements in the periodic table of elements. It is not only a rare metal, but also a strategic metal. It has high temperature strength, good corrosion resistance, machinability, good performance and With comprehensive properties such as low thermal neutron absorption cross-section, it is widely used in nuclear energy, aerospace, aviation, ships, electronics, textiles, papermaking, medicine and other industries, and has broad prospects. In recent years, due to its excellent corrosion resistance, its application in the chemical industry h...

AI Technical Summary

Problems solved by technology

Generally speaking, with the increase of ingot shape, the difficulty of smelting increases, and the composition uniformity of large ingots is often difficult to be guaranteed.

With the rapid development of domestic and foreign economies, the demand for large-scale zirconium corrosion-resistant equipment in the chemical industry and other industries has increased sharply, and the general production process of large-scale zirconium corrosion-resistant A large number of welding must be carried out, the production efficiency is low, the quality of the weld seam cannot be guaranteed 100%, the weld seam leakage accidents are prone to occur, and the crevice corrosion cannot be completely eliminated.