Method for rolling titanium and titanium alloy bar wire bar with three-roller type Y continuous rolling mill

Abstract

The invention provides a method for rolling of titanium and titanium alloy bar and wire rod with three-roller Y continuous rolling mill. The technical proposal of the invention is as follows that the three-roller Y continuous rolling mill group is used for 6 to 18 pass continuous rolling of heated titanium and titanium alloy bar billet of phi50mm to form bar billet of 30 to 8mm (or hexagonal and triangular structure of 24 to 8mm) or rolling wire billet of phi20 to 8mm. by adopting the method, bar billet of phi50mm can be rolled into bar billet of phi30 to 8mm (or triangular and hexagonal structure) or rolling wire billet of phi20 to 8mm after heated for one time. Compared with the prior methods of multiple fire time casting, swaging, two-roller transverse-arrangement non-continuous rolling and two-roller longitudinal-arrangement continuous rolling, all of which are used for production of titanium and titanium alloy bar or rolling wire billet, the invention not only has the advantages of high efficiency, energy saving, low noise, small occupying and high precision of the size as well as good organization perforation of titanium and titanium alloy bar and wire rod, but also can produce triangular or hexagonal section and other allotype section.

Description

technical field [0001] The invention relates to a processing method for titanium and titanium alloy rods and wires technical background [0002] Titanium and titanium alloys have the characteristics of high specific strength, acid and alkali resistance, and strong affinity with the human body, and are widely used in aviation, medicine, petrochemical and other industries. At present, the domestic production of Φ30-8mm titanium and titanium alloy bars generally adopts three methods: forging, rotary forging, and rolling; Φ20-8mm titanium and titanium alloy coils generally adopt the rolling method. [0003] Existing method 1: forging [0004] Forging is one of the basic methods for blanking rare metals and forging bars, cakes, and rings. Forging equipment can use general equipment such as forging hammers and hydraulic presses, and special equipment such as precision forging machines can also be used for production. Φ30-20mm bars usually use electric air hammer. The forging met...

AI Technical Summary

Problems solved by technology

[0012] The 250 two-roll discontinuous rolling mill is shown in Figure 1. Its advantage is that the electric control and transmission are simple. The disadvantage is that the rolling speed cannot be changed according to the process requirements, which leads to:

[0013] ①The rolling speed is only 1 gear, which is too low for the finished rolling mill and too fast for the rough rolling;

[0014] ②The temperature drop is too fast, the unit weight of the product is small (about 5kg), it is difficult to produce small-sized products, and the product size fluctuates greatly;

[0015] ③Instable production, high labor intensity, too much reliance on the skills of operators

[0021] 250 two-roll rolling mill (horizontal non-continuous rolling or tandem continuous rolling) rolling into Φ30-8mm bar or Φ16-8mm coiled wire, because the rolled piece receives two-way compressive stress, it is easy to produce splitting Cracking, large width and easy to appear ears; in addition, 90° twisted rolling is used, the rolled piece is unstable from the entrance to the center, resulting in a lot of waste and low yield during rolling

However, in the 1980s and 1990s in my country, the Y-type continuous rolling mill was applied to rolling steel wire rods and tungsten-molybdenum wire rods, but the Y-type rolling mill has not been applied to the production of titanium and titanium alloy rods and wires.

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