High-efficiency short-process heat treatment technology for marine titanium alloy

A titanium alloy, short-process technology, applied in the field of material processing, can solve the problems of low annealing efficiency, difficulty in achieving performance indicators, and difficult control of plate shape, etc., and achieve the effect of increased annealing efficiency and good performance uniformity

Active Publication Date: 2012-07-11
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increase in the use of ships and civilian ships, the application of TA5 alloy plates is increasing, but the requirements for comprehensive performance indicators such as mechanical properties and process properties are relatively high, which results in a wide range of heat treatment for TA5 alloy plates. Narrow, the performance index is not easy to meet the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1

[0014] First, stack 12 4mm TA5 alloy plates together, and place a 50mm thick plain carbon steel press plate on the top. The furnace temperature is raised to 500℃ and the furnace is heated. After the temperature stabilizes, it is held at 500℃ for 80min, and then the temperature is 5℃ / min. The heating rate is raised to 700℃, and the temperature is kept for 200min. The roller rotation frequency is 6Hz. After the heat preservation is completed, it will be air-cooled on the roller table, and the roller rotation frequency will be 15Hz during air cooling. Sampling test according to GB / T3621-2007, the results show that the difference in yield strength and tensile strength of TA5 alloy plates stacked in different positions is not more than 25Mpa, the elongation is 20-22%, and the mechanical and technological properties meet GB / According to the requirements of T3621-2007, the plate unevenness is less than 8mm / m.

Example Embodiment

[0015] Example 2

[0016] First put 11 4mm TA5 alloy plates on top of each other. Place a 30mm thick plain carbon steel press plate on the top. The furnace temperature is increased to 450℃ and the furnace is heated. After the temperature stabilizes, it is held at 500℃ for 70min, and then the temperature is 5℃ / min. The heating rate is raised to 700℃, and the temperature is kept for 160min. The roller rotation frequency is 6Hz. After the heat preservation is completed, it will be air-cooled on the roller table. The roller rotation frequency is 10Hz during air cooling. For the TA5 alloy plate treated by this heat treatment process, the difference in yield strength and tensile strength of the TA5 alloy plates stacked in different positions is not more than 15Mpa, the elongation is between 19.5% and 22%, and the mechanical and technological properties meet GB / According to the requirements of T3621-2007, the plate unevenness is less than 8mm / m.

Example Embodiment

[0017] Example 3

[0018] First, stack 8 5mm TA5 alloy plates together, and place a 50mm thick plain carbon steel pressing plate on the top. The furnace temperature is raised to 500℃ and the furnace is heated. After the temperature is stabilized, it is kept at 500℃ for 50min, and then the temperature is 4℃ / min. The heating rate is increased to 700℃, and the temperature is kept for 150min. The roller rotation frequency is 5Hz. After the heat preservation is completed, it is air-cooled on the roller table, and the roller rotation frequency is 10Hz during air cooling. For the TA5 alloy plate treated by this heat treatment process, the difference in yield strength and tensile strength of the TA5 alloy plates stacked in different positions is not more than 20Mpa, the elongation is between 19 and 23%, and the mechanical properties and process properties meet GB / T3621-2007 requires that the unevenness of the plate is less than 10mm / m.

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PUM

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Abstract

The invention discloses a high-efficiency short-process heat treatment technology for marine titanium alloy, wherein a plurality of TA5 (Titanium Alloy5) plates are overlapped, a Q235 pressing plate is arranged on the TA5 plates, the thickness of the Q235 pressing plate ranges from 30 to 50 mm, the roughness degree of the pressing plate is less than or equals to 5 mm/m, the charging is performed at the temperature ranging from 400 to 500 DEG C, heat preservation is performed for 50 to 70 minutes at the temperature of 550 DEG C, and temperature rises at the speed of 4 to 5 DEG C/min until reaching 700 DEG C and then heat preservation is performed for 150 to 200 minutes; in addition, the TA5 plates move about in a roller hearth furnace in a reciprocating manner during the whole heat treatment process, the rotational frequency of a roller ranges from 5 to 6 Hz, and the rotational frequency of the roller ranges from 10 to 15 Hz in a wind cooling stage. The TA5 plates that are processed through the high-efficiency short-process heat treatment technology achieve good performance uniformity, the shear strength of all parts of the TA5 plates ranges from 680 to 700 Mpa, the tensile strength ranges from 700 to 725Mpa, the elongation percentage ranges from 19 to 23 percent, and the high-efficiency short-process heat treatment technology is a plurality of times the annealing efficiency of a continuous annealing furnace.

Description

technical field [0001] The invention relates to a material processing technology, in particular to a high-efficiency short-flow heat treatment process for marine titanium alloys. Background technique [0002] With the increase in the use of ships and civilian ships, the application of TA5 alloy plates is increasing, but the requirements for comprehensive performance indicators such as mechanical properties and process properties are relatively high, which results in a wide range of heat treatment for TA5 alloy plates. Narrow, the performance index is not easy to meet the requirements of GB / T3621. At present, the TA5 alloy sheet is mainly annealed in a continuous annealing furnace, but the price of the continuous annealing furnace is much higher than that of the ordinary roller hearth furnace, and the continuous annealing furnace is only used for continuous annealing of a single sheet, and the annealing efficiency is low. Not easy to control either. Contents of the inventi...

Claims

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Application Information

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IPC IPC(8): C22F1/18
Inventor 王树军包淑娟刘茵琪王非顾新盛李渤渤
Owner LUOYANG SUNRUI TI PRECISION CASTING
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