Manufacturing method of large-calibre seamless titanium alloy barrel body

A seamless titanium alloy and manufacturing method technology, applied in the direction of manufacturing tools, other manufacturing equipment/tools, etc., can solve the problems of short production process, low yield, high yield, etc., to achieve simple method, low manufacturing cost, organization fine uniform effect

Inactive Publication Date: 2010-06-16
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for manufacturing a large-diameter seamless titanium alloy cylinder, which has a short production process, high yield, low cost, and high material utilization rate. It is easy to implement and can effectively solve many defects in the traditional large-diameter titanium alloy cylinder manufacturing process, such as complex process, high cost, and extremely low yield.

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  • Manufacturing method of large-calibre seamless titanium alloy barrel body
  • Manufacturing method of large-calibre seamless titanium alloy barrel body
  • Manufacturing method of large-calibre seamless titanium alloy barrel body

Examples

Experimental program
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Effect test

Embodiment 1

[0044] combine figure 2 , in this embodiment, when manufacturing a large-diameter seamless titanium alloy cylinder, its manufacturing process includes the following steps:

[0045] Step 1. Casting: the titanium alloy raw material is cast into a large-diameter titanium alloy tube billet by using a vacuum melting furnace and a vacuum melting method. The vacuum melting furnace is a vacuum consumable arc shell solidification furnace, and titanium alloy ingots or titanium alloy forging rods are used as consumable electrodes during vacuum melting. In this embodiment, the Φ480mm qualified TA2 titanium alloy ingot (or forged rod) through secondary vacuum consumable arc smelting is used as the smelting consumable electrode, and the vacuum melting is carried out in an 800Kg vacuum consumable arc coagulation furnace and Casting into a straight tube blank with an inner diameter of Φ1000mm, a wall thickness of δ40mm and a length of L500mm. For vacuum melting, titanium alloy ingots or ti...

Embodiment 2

[0054] In this example, the difference from Example 1 is that in step 1, when the titanium alloy raw material is cast into a large-diameter titanium alloy billet by using a vacuum melting furnace through a vacuum melting method, the obtained large-diameter titanium alloy billet is outer The diameter Φ is 100mm, the wall thickness δ is 5mm, and the length L is 150mm. When vacuum melting, titanium alloy ingots or titanium alloy forging rods are used as electrodes, and the vacuum degree of melting and casting is 0.67Pa. When hot isostatic pressing is carried out in step 2, the temperature is 600° C., the applied pressure is 100 MPa, and the hot isostatic pressing time is 1 hour. When multi-pass hot spinning is performed in step 4, the spinning temperature of the initial pass is 550±10°C, the spinning temperature of the intermediate pass is 400±10°C, and the spinning temperature of the final pass is 200±10°C. And when carrying out multi-pass strong hot spinning, the pass thinning ...

Embodiment 3

[0056] In this example, the difference from Example 1 is that in step 1, when the titanium alloy raw material is cast into a large-diameter titanium alloy billet by using a vacuum melting furnace through a vacuum melting method, the obtained large-diameter titanium alloy billet is outer The diameter Φ is 2000mm, the wall thickness δ is 40mm, and the length L is 1000mm. For vacuum melting, titanium alloy ingots or titanium alloy forging rods are used as electrodes, and the vacuum degree of melting and casting is 6.7Pa. When hot isostatic pressing is carried out in step 2, the temperature is 1000° C., the applied pressure is 200 MPa and the pressing time is 2.5 hours. When multi-pass hot spinning is carried out in step 4, the heating temperature gradually decreases with the increase of hot spinning passes. The spinning temperature of the first pass is 900±20°C, and the spinning temperature of the intermediate pass is 700±20°C. The final spinning temperature is 600±20°C. And whe...

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Abstract

The invention discloses a manufacturing method of a large-calibre seamless titanium alloy barrel body, which comprises the steps of: 1, casting: casting titanium alloy raw materials into a large-calibre titanium alloy barrel blank by using a vacuum smelting furnace and through a vacuum smelting method; 2, hot isostatic pressing: performing the hot isostatic pressing for the large-bore titanium alloy barrel blank in an inert protective atmosphere by using a hot isostatic pressing device; 3, mechanical machining: processing a chamfer angle for spinning at the head of the large-bore titanium alloy barrel blank after the hot isostatic pressing by using mechanical processing equipment to obtain a spinning barrel blank; 4, spinning: thermally spinning the mechanically processed spinning barrel blank with the total deformation rate not less than 60% for many times by using spinning equipment to obtain a large-bore seamless titanium alloy thin-wall barrel body; and 5, subsequent treatment. The production process has short process flow, high yield, low cost, high utilization rate of materials and easy realization, and the defects of the large-bore seamless titanium alloy barrel body, such as complex process, high cost, low yield and the like of the traditional production process can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of metal precision plastic forming, and in particular relates to a method for manufacturing a large-diameter seamless titanium alloy cylinder. Background technique [0002] The traditional extrusion (or skew rolling and piercing) rolling process currently used in my country can only produce titanium alloy seamless pipes below Φ114mm. Only the Φ210mm titanium alloy tube billet has been tested by the back extrusion method, and the uniformity of the wall thickness is poor and the length is short, which cannot meet the requirements of use. Cylinders with a diameter of 200-400mm are made of rods, machined into thick-walled billets and hot spinning; seamless titanium alloy thin-walled cylinders with a diameter greater than 400mm are mainly manufactured by ingot casting, billet forging, grinding, Repeated piercing for bar, blanking, punching, forging into ring, machining, heat treatment, ring rolling, machining, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04
Inventor 杨英丽苏航标郭荻子赵彬吴金平赵恒章卢亚锋罗媛媛
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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