Technology for one-heat rolling of thin and wide titanium plate

Abstract

The invention discloses a technology for one-heat rolling of a thin and wide titanium plate, and belongs to a manufacturing technology for nonferrous materials. The technology sequentially includes the steps of blank heating, descaling, rolling and cooling, a traceless heating method is adopted during blank heating, one-heat rolling is performed on a titanium plate with the thickness being 6-15 mm, a 2800mm medium-thickness plate rolling mill is adopted in the rolling process, a roller of the rolling mill is made of high-chromium cast iron, and the convexity of the roller is increased by 0.03-0.07 mm. According to the technology, the titanium blank traceless heating technology and the roller convexity design are adopted, one-heat rolling is performed, and the manufacturing method for producing the industrial titanium plate by means of the 2800mm medium-thickness plate rolling mill is adopted, so that the investment production cost is low, the production efficiency is high, the surfacequality is high, and the performance meets and is higher than the national standard requirements.

Description

technical field [0001] The invention relates to the manufacturing technology of non-ferrous metal materials, in particular to a process for one-fire rolling thin and wide-sized titanium plates. Background technique [0002] Titanium and titanium alloys have high specific strength, good corrosion resistance and biocompatibility, so they are widely used in aerospace, marine, petrochemical and biological engineering and other fields. The use of titanium in a country can reflect the overall level of the country's titanium material processing field. For example, in the supersonic reconnaissance aircraft of the United States, titanium accounts for 93% of the weight of the entire aircraft; the Russian Navy's Sierra II titanium alloy attack nuclear submarine is the world's most One of the advanced nuclear submarines, because the entire submarine shell is made of titanium alloy, which is light in weight and high in strength, and its sailing speed and dive depth are superior to those ...

AI Technical Summary

Problems solved by technology

About 48,400 tons, the thickness specifications range from 0.3 to 70mm, and the width reaches 2500mm. The plate processing presents the characteristics of many specifications and low output of a single specification. If you invest in the construction of a metal titanium plate rolling production line alone, the investment cost is high and the equipment utilization rate is low.

At present, the production of titanium plate generally includes the following steps: billet heating, descaling, rolling, cooling and post-processing, etc., but there are the following problems: (1) billet heating is generally carried out in a heating furnace, there is hard friction, and the titanium billet is in a high temperature state The bottom is soft and there is a problem of scratching, and the width between the water volume of the heating furnace is 1.6m. Titanium slabs with a width of less than 1.6m cannot be heated in the furnace, and slabs with a width of more than 1.6m have the risk of falling off if the furnace is heated. On the other hand, titanium The contact between the billet and the water beam, the water beam takes away the temperature of the lower surface of the titanium billet, and the heating furnace process will inevitably lead to the problem of uneven heating of the lower surface, which will affect the subsequent production and rolling; (2) the surface of the roll after rolling a large amount of carbon steel There will be problems such as wear of the hardened layer and iron nodules indentation; (3) The titanium plates below 15mm are rolled by two fires, which increases the surface oxidation of the intermediate link of the titanium billet, and the subsequent rolling process requires Carry out re-grinding, and the amount of regrinding is about 4%, which increases labor intensity and reduces the yield of titanium plates; two-fire rolling prolongs the product production cycle, performs secondary heating, increases power energy consumption, and increases production costs