Method for heat treatment of large-sized titanium alloy frame parts by virtue of special-shaped blocks

A titanium alloy and special-shaped block technology, which is applied in the field of heat treatment process for large titanium alloy frame parts, can solve problems such as deformation, affecting the quality of parts delivery, and reducing the progress of parts production and delivery.

Inactive Publication Date: 2015-03-04
SHENYANG AIRCRAFT CORP
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  • Abstract
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Problems solved by technology

In order to solve the deformation problem of large titanium alloy frame parts, in the past production, rectangular pads/briquetting blocks have been used for heat treatment and correction. It is difficult to

Method used

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  • Method for heat treatment of large-sized titanium alloy frame parts by virtue of special-shaped blocks
  • Method for heat treatment of large-sized titanium alloy frame parts by virtue of special-shaped blocks
  • Method for heat treatment of large-sized titanium alloy frame parts by virtue of special-shaped blocks

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Example Embodiment

[0016] A heat treatment process for large-scale titanium alloy frame parts using special-shaped blocks includes the following steps:

[0017] 1) Such as figure 1 with figure 2 As shown, a number of special-shaped blocks are processed: 1Cr18Ni9Ti is used to manufacture special-shaped blocks, one side of the special-shaped block is designed as a plane, and the other side is designed as a step table 1. The distance of the step table is designed to be consistent according to the surface shape of the parts to be heat treated; Set bosses 2 at both ends of the special-shaped block to facilitate handling;

[0018] 2) Choose a titanium alloy vacuum annealing heat treatment furnace with a flat furnace bottom plate for heat treatment. The heat treatment category is Class III (±10°C), and the temperature uniformity and system error are qualified within the validity period;

[0019] 3) Check the surface condition of the parts before installing the furnace, and clean the parts and the special-sha...

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Abstract

The invention relates to a method for heat treatment of large-sized titanium alloy frame parts by virtue of special-shaped blocks. The method comprises the following steps: 1) processing a plurality of special-shaped blocks; 2) carrying out heat treatment by virtue of a titanium alloy vacuum annealing heat treatment furnace with a flat furnace bottom plate; 3) carrying out surface state inspection on the parts before the parts are charged into the furnace and cleaning the parts and the special-shaped blocks with alcohol or acetone, when the parts are charged into the furnace, arranging one end having a plane of each special-shaped block on the furnace bottom plate of the vacuum heat treatment furnace, flatwise placing the parts on the laid special-shaped blocks according to the order-difference corresponding relationship, placing special-shaped blocks having corresponding sizes to the parts on the parts and positioning and then carrying out vacuum stabilizing annealing heat treatment; and 4) heating the parts by virtue of heating steps so as to ensure that the parts are evenly heated during heating for the annealing heat treatment. By the method, the deformation of the parts is effectively controlled, the accurate control of the sizes of the parts is achieved, the stabilizing heat treatment of the parts is ensured, the delivery quality of the parts is guaranteed and meanwhile, the production efficiency is increased.

Description

technical field [0001] The invention relates to a heat treatment process for large titanium alloy frame parts by using special-shaped blocks, which belongs to a heat treatment process. Background technique [0002] During the processing of titanium alloy parts for aircraft, due to the poor state of the raw materials themselves, and the subsequent machining and welding, there will be a lot of internal stress, which will cause deformation of the parts and affect subsequent processing. Most titanium alloy parts need to be heat treated. It is received to control the deformation of parts, especially some large titanium alloy frame parts. Due to the relatively large size of parts and uneven wall thickness, deformation control has always been a difficult point. In order to solve the deformation problem of large titanium alloy frame parts, in the past production, rectangular pads / briquetting blocks have been used for heat treatment and correction. It is difficult to solve large The...

Claims

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Application Information

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IPC IPC(8): C22F1/18
Inventor 李向波焦清洋权纯逸曲凤
Owner SHENYANG AIRCRAFT CORP
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