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Alfa and Beta type titanium alloy sheet with excellent cold rolling properties and cold handling properties, and production method therefor

一种处理性、冷轧性的技术，应用在α＋β型钛合金板及其制造领域，能够解决减小冷轧变形阻力等问题，达到变形阻力小、高板厚减少率的效果

Active Publication Date: 2013-11-13
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, these technologies do not suppress the progress of cracks in the width direction of the sheet during cold rolling and in the coil after cold rolling, and reduce the deformation resistance during cold rolling.

Method used

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  • Alfa and Beta type titanium alloy sheet with excellent cold rolling properties and cold handling properties, and production method therefor
  • Alfa and Beta type titanium alloy sheet with excellent cold rolling properties and cold handling properties, and production method therefor
  • Alfa and Beta type titanium alloy sheet with excellent cold rolling properties and cold handling properties, and production method therefor

Examples

Experimental program
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Embodiment

[0127] Next, examples of the present invention will be described, but the conditions in the examples are examples of conditions adopted for confirming the practicability and effects of the present invention, and the present invention is not limited to this example of conditions. In the present invention, various conditions can be adopted as long as the object of the present invention is achieved without departing from the gist of the present invention.

[0128]

[0129] A titanium material having the composition shown in Table 1 was melted by a vacuum arc melting method, hot forged to form a slab, heated to 940°C, and then passed through a slab thickness reduction rate of 97%. Hot-rolled to form a 3 mm hot-rolled sheet. The finishing temperature of hot rolling was 790°C.

[0130] The hot-rolled sheet was pickled to remove scale, and a tensile test piece was prepared to investigate the tensile properties, and X-ray diffraction (using RINT2500 manufactured by Rigaku Co., Ltd....

Embodiment 2

[0146] The billets of test numbers 4, 8, and 14 in Table 1 were hot-rolled under the various conditions shown in Tables 2 to 4, then pickled to remove scale, and then the tensile properties were investigated, and X-ray diffraction (Using RINT2500 manufactured by Rigaku Co., Ltd., Cu-Kα, the voltage is 40kV, the current is 300mA), and the (0002) pole diagram of titanium is tilted from the plate width direction to the normal direction within the orientation angle of 0 to 10° and Take the normal direction of the plate as the central axis and rotate the X-ray relative intensity peak within the orientation angle of ±10° from the width direction of the plate as XTD, and set the orientation inclined from the normal direction of the plate to the width direction of the plate to 0 to 30° When the X-ray relative intensity peaks within the angle and within the orientation angle rotated around the normal of the plate as the central axis are XND, their ratio: XTD / XND is used as the X-ray ani...

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Abstract

An alpha+beta type hot-rolled titanium alloy sheet, wherein: (a) ND represents the normal direction of a hot-rolled sheet; RD represents the hot rolling direction; TD represents the hot rolling width direction; theta represents the angle formed between the orientation of c axis and the ND; phi represents the angle formed between a plane including the orientation of the c axis and the ND, and a plane including the ND and the TD; (b1) XND represents the highest (0002) relative intensity of the X-ray reflection caused by crystal grains when theta is from 0° to 30° and phi is within the entire circumference; (b2) XTD represents the highest (0002) relative intensity of the X-ray reflection caused by crystal grains when theta is from 80° to 100° and phi is ±10°. (c) The alpha+beta type titanium alloy sheet has a value for XTD / TND of at least 5.0.

Description

technical field [0001] The present invention relates to an α+β-type titanium alloy sheet having excellent manufacturability such as cracks (cracks) hardly progressing in the sheet width direction during cold rolling or in a coil after cold rolling, and low deformation resistance (resistance force) during cold rolling, and a manufacturing method thereof . Background technique [0002] Conventionally, α+β-type titanium alloys have been used as aircraft components due to their high specific strength. In recent years, the weight ratio of titanium alloys used in aircraft components has increased, and their importance has increased. In addition, for example, in the field of consumer products, α+β-type titanium alloys characterized by high Young's modulus and light specific gravity are widely used for golf club faces. [0003] In addition, in the future, high-strength α+β-type titanium alloys are also expected to be used in automobile parts that emphasize weight reduction, or geo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00B21B3/00C22F1/18C22F1/00
CPCC22F1/00C22F1/183C22C14/00B21B3/00C22F1/18
Inventor 川上哲藤井秀树
Owner NIPPON STEEL CORP
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