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Preparation method of thick slab of chamfer titanium alloy

A technology of titanium alloy and thick slabs, which is applied in the field of preparation of chamfered titanium alloy thick slabs, can solve the problems of unsuitable preparation of titanium alloy thick slabs, and achieve the effect of simple method, easy realization, and reduced folding

Active Publication Date: 2014-03-26
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the common slab preparation method is no longer suitable for the preparation of titanium alloy thick slabs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1. Cut off the titanium alloy ingot riser and ingot bottom, remove the skin pores of the titanium alloy ingot, and repeatedly upset the titanium alloy ingot with the skin pores removed at a temperature of 200°C above the β transformation point of the titanium alloy and elongation forging twice, control forging cumulative deformation to 75%, final forging temperature at 820°C, to obtain titanium alloy forging billet;

[0025] Step 2. The titanium alloy forging billet described in step 1 is repeatedly upset and elongated for 3 times at a temperature of 80° C. above the β phase transition point of the titanium alloy. The cumulative deformation of forging is 70%, and the final forging temperature is 820°C; then forge the forged titanium alloy billet at a temperature of 10°C above the β phase transition point of the titanium alloy for 2 fires, repeat upsetting and elongating forging 2 times for each fire, and control the forging temperature of each fire. The cumulative ...

Embodiment 2

[0030] Step 1. Cut off the titanium alloy ingot riser and ingot bottom, remove the skin pores of the titanium alloy ingot, and repeatedly upset the titanium alloy ingot with the skin pores removed at a temperature of 150°C above the β phase transition point of the titanium alloy and elongation forging 3 times, the accumulative deformation of forging is controlled to be 85%, and the final forging temperature is 800°C to obtain a titanium alloy forging billet;

[0031] Step 2. Repeat upsetting and elongating forging the titanium alloy forging blank described in step 1 under the condition that the temperature is 50° C. above the β transformation point of the titanium alloy. The cumulative deformation of forging is 80%, and the final forging temperature is 800°C; then the forged titanium alloy forging billet was forged once at a temperature of 30°C above the β-transition point of the titanium alloy. During the forging process, repeated upsetting and elongation forging for 3 times, ...

Embodiment 3

[0036] Step 1. Cut off the titanium alloy ingot riser and ingot bottom, remove the skin pores of the titanium alloy ingot, and repeatedly upset the titanium alloy ingot with the skin pores removed at a temperature of 100°C above the β phase transition point of the titanium alloy and elongation forging 3 times, the accumulative deformation of forging is controlled to be 80%, and the final forging temperature is 810°C to obtain a titanium alloy forging billet;

[0037] Step 2. The titanium alloy forging billet described in step 1 is repeatedly upset and elongated for 2 times under the condition that the temperature is 60° C. above the β transformation point of the titanium alloy. The cumulative deformation of forging is 75%, and the final forging temperature is 810°C; then the forged titanium alloy forging billet is forged once under the condition that the temperature is 20°C above the β transformation point of the titanium alloy. During the forging process, repeated upsetting an...

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Abstract

The invention discloses a preparation method of a thick slab of a chamfer titanium alloy. The preparation method comprises the following steps: 1, cogging-forging a titanium alloy ingot to obtain a titanium alloy forging stock; 2, carrying out intermediate forging on the titanium alloy forging stock 2-3 heating times; 3, upsetting and stretch-forging the intermediate forged titanium alloy forging stock, shaping, chamfering edges on the upper surface and the lower surface of the shaped titanium alloy forging stock, and shaping to obtain a slab; and 4, machining the slab to obtain the chamfer titanium alloy with the thickness of 180-400mm. According to the invention, the large size chamfer titanium alloy slab with the thickness of 180-400mm can be prepared by adopting multi-heating and a manner combining repeatedly upsetting and stretching. By adopting the titanium alloy slab prepared with the method of the invention to roll, the edge folding of a sheet material can be reduced, so the cutting loss of the sheet material head, the sheet material tail and sheet material side surfaces is reduced, the sheet material rolling yield is improved by 5-8%, and the production cost is substantially reduced.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a method for preparing a chamfered titanium alloy thick slab. Background technique [0002] With the development of technologies in aerospace, shipbuilding, petroleum, chemical and other fields, the specification and size of titanium alloy plates are required to develop in a thicker direction. The increase in product thickness requires the selection of a thicker slab, otherwise insufficient deformation will affect the structure and performance of the product. [0003] Due to the limitation of the capacity of the rolling mill, the reduction of the titanium alloy thick slab is generally not large during the first few passes of rolling, and the deformation is difficult to penetrate into the center of the rolled piece, and double drums are prone to appear at the head, tail and side of the rolled piece. As the rolling process progresses, the double drums...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/02B21J5/00
Inventor 谢英杰舒滢杨建朝曲恒磊吴华高文超李维邓超文娜叶红川王瑞琴党鹏周玉川陈钧伟杨利
Owner WESTERN TITANIUM TECH
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