Process for preparing Ti662 titanium alloy tube material

A preparation process, titanium alloy technology, applied in the field of preparation process of Ti662 titanium alloy pipe, can solve the problems such as no alloy pipe found, achieve good room temperature and high temperature mechanical properties, high impact strength, high specific strength effect

Active Publication Date: 2015-04-08
宁夏中色金航钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of pipe is rarely used in China, and th

Method used

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  • Process for preparing Ti662 titanium alloy tube material
  • Process for preparing Ti662 titanium alloy tube material
  • Process for preparing Ti662 titanium alloy tube material

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Experimental program
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Embodiment 1

[0057] According to a company's requirements for Ti662 pipes: chemical composition: 5.0≤Al≤6.0%, 5.0≤V≤6.0%, 1.5≤Sn≤2.5%, 0.35≤Cu≤1.0%, 0.35≤Fe≤1.0%, C≤0.05 %, N≤0.04%, H≤0.0125%, O≤0.20%, and the balance is Ti. And other impurity elements +1.5 ×8 ±0.8 ×2600 +10 mm. Surface quality: Surface roughness is less than 3.2μm. Tensile properties at room temperature: tensile strength ≥ 1103MPa, yield strength ≥ 1034MPa, elongation ≥ 10%. Room temperature impact performance: A KU2 ≥9.47J. Tensile properties at 205°C: tensile strength ≥ 931MPa, yield strength ≥ 807MPa, elongation ≥ 13%. Impact performance at 205°C: A KU2 ≥13.56J. Microstructure: The equiaxed α phase is precipitated on the transformed β matrix, or the equiaxed α phase and elongated α phase are precipitated on the transformed β matrix, and the main grain size judged according to ASTM E112 should be grade 6 or higher.

[0058] Concrete preparation process is as follows:

[0059] 1. Ingot preparation:

[0060] Us...

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Abstract

The invention relates to a process for preparing a Ti662 titanium alloy tube material. The process is characterized by comprising the following steps: (1) preparing an ingot, namely firstly preparing a Ti662 titanium alloy ingot or TC10 titanium alloy ingot with phi of 600mm, and then detecting the phase transformation point T beta by a heating metallographic method; (2) forging a bar billet; (3) carrying out ultrasonic flaw detection, namely carrying out ultrasonic flaw detection on the forged bar billet according to the standard GB/T5193-2007 to require the flow detection level to achieve the class B at least; (4) preparing an extrusion billet, namely mechanically processing the forged bar billet; (5) coating, washing the prepared billet with HNO3 solution or alcohol, coating with two layers, wherein the inner coating is a 1mm A3 steel plate, and the outer coating is a 1mm copper strip. The finished product Ti662/TC10 tube material prepared by the process has the advantages of uniform microscopic structure and fine crystalline grain, and has good room-temperature and high-temperature mechanical performance.

Description

technical field [0001] The invention relates to a preparation process of a Ti662 titanium alloy pipe. Background technique [0002] Ti662 (Ti-6Al-6V-2Sn-0.5Cu-0.5Fe) titanium alloy is a high-strength titanium alloy invented by New York University on the basis of Ti-6Al-4V titanium alloy. Its strength after solution aging heat treatment is It can reach 1200MPa. This alloy is mainly used in occasions where the temperature is 300-400°C and the specific strength is high. The main products are plates, bars and small forgings, which are used for aerospace structural parts, centrifuges, rocket engines and other components. [0003] Because Ti662 titanium alloy has high specific strength and excellent corrosion resistance, it works under seawater medium or complex geological environment conditions, and its corrosion resistance is higher than that of stainless steel, especially for pitting corrosion, acid corrosion and stress corrosion resistance. Therefore, it has been applied to...

Claims

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Application Information

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IPC IPC(8): C22F1/18
CPCB21C37/06B23P15/00C22F1/183
Inventor 陈睿博刘守田朱宝辉刘彦昌赵洪章胡晓晨
Owner 宁夏中色金航钛业有限公司
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